Showing papers on "Diesel engine published in 1978"

Application of Bioassay to the Characterization of Diesel Particle Emissions

Abstract: A wide variety of combustion sources produce soot, i.e., carbon aerosols containing variable quantities of organic matter. The most significant transportation-related sources of such materials are diesel engines. Diesel power has been used for railway locomotives, long haul trucks, and earthmoving equipment for many years. However, recently a strong trend has developed toward use of diesel engines in urban service vehicles and also taxicabs. In the near future substantial numbers of diesel-powered automobiles may be used by the general public.

Adiabatic turbocompound engine performance prediction

Abstract: The contemporary turbocharged aftercooled diesel engine is providing the world with one of the most efficient and dependable powerplants known to mankind. A adiabatic turbocompound diesel engine is analyzed in this paper to demonstrate that the contemporary diesel cycle without a cooling system could be the beginning of a new era in continued diesel engine efficiency, reliability and durability. The problems with the diesel cooling system encountered in service are presented. The consequence of an adiabatic turbocompound engine without any cooling system is treated for engine performance. /GMRL/

Experimental Reduction of NOx, Smoke, and BSFC in a Diesel Engine Using Uniquely Produced Water (0 - 80%) to Fuel Emulsion

Abstract: With the aid of static mixer and non-ionic emulsifying agent, a comparatively stable water-fuel emulsion was obtained. Engine performance in a 4 cycle direct injection engine using these fuels were studied. A large reduction of NOx concentration was obtained over the wide range of engine operations, in spite of increased ignition lag and rapid combustion. Furthermore, improvements of economy and reduction of exhaust smoke were obtained. The reduction of NOx concentration, fuel consumption and smoke were even more remarkable when compared with operating same engine with water fumigation.

A Preliminary Study on the Utilization of Water-in-Oil Emulsions in Diesel Engines

Abstract: A single cylinder diesel engine study of water-in-oil emulsions was conducted to investigate the effects of water emulsification on particulate emission and the IMEP, with the fuel-air ratio ranging from 002 to 007 Results indicate that an optimum water content for particulate reduction seems to be between 10 and 20 percent by volume, and that with equal amount of fuel injection the IMEP is minimally affected with water addition

A Study of Pollutant Formation within the Combustion Space of a Diesel Engine

Abstract: The concentration of pollutants in the combustion space of an indirect injection swirl diesel engine have been studied on a time basis. A fast acting water-cooled gas sampling valve was used for the in-cylinder sampling. The measured concentrations have been used to visualize a simplified reaction zone structure of diesel combustion. The results show that carbon monoxide appears first in the reaction zone followed by nitric oxide and soot. The high soot concentration exists only for a short period of time (3 ms) and is rapidly reduced to a low level whereas carbon monoxide is gradually oxidised to carbon dioxide over the expansion cycle. The reaction zone is found to be 10 to 20 mm wide and its widest near the chamber wall.

The Starved Lubrication of Piston Rings in a Diesel Engine

Abstract: Miniature pressure and film thickness transducers mounted in the cylinder liner of a diesel engine have been used to study the lubrication of piston rings. The method of using the gauges to determine oil starvation in the inlet of the rings is described and results from a working engine are presented. Calculations for both starved and fully flooded rings have been carried out and are compared with the measured results.

Diesel exhaust particle size distributions - Fuel and additive effects

Abstract: Particle mass and size distribution measurements were made on the exhaust of an Onan prechamber diesel engine in order to describe the influence of fuel and fuel additives on physical characteristics of particulate matter emitted from a prechamber diesel engine. Seven fuels were examined (No. 1 and No. 2 diesel fuels, 40 and 50 cetane number secondary reference fuels, and No. 2 diesel fuel doped with three different concentrations of Lubrizol 565, a barium-based smoke suppressant). Fuel cetane number had a marked influence on diesel exhaust particle emissions. Reducing the cetane number decreased particle mass and volume concentrations in exhaust. A probable explanation for this decrease was that longer ignition delay periods associated with reduced cetane number fuels allowed more complete mixing of fuel and air prior to ignition, thus minimizing the amount of fuel burnt under rich conditions that lead to particle formation. It was found that the barium smoke suppression additive markedly reduced Bosch smoke number but did not produce similar reductions in particle mass emissions. Under certain conditions of light load and high additive concentrations, mass emissions were increased. The additive apparently suppresses the production of light-absorbing carbon particles, but leads to the formation of dense but only weakly light-absorbing barium-containing particles. No. 1 and No. 2 diesel fuels and the 50 cetane number reference fuel produced very similar emissions, with emission indexes in the 0.3-1.3 mg range and volume mean diameters between 0.09 and 0.15 micrometers. The 40 cetane number reference fuel produced both smaller emission indexes and particle diameters.

Method and device for improving the efficiency of internal combustion engines

Abstract: A method for improving the efficiency of an internal combustion engine such as a Diesel engine, by ensuring, on the one hand, efficient cylinder scavenging, particularly at light engine loads and/or low speeds, and on the other hand, a reduction of the effective compression ratio resulting in temperature reduction preferably under high engine loads and/or at high speeds. Said method consists in creating, for each engine cylinder and each engine cycle, a reserve of compressed air, during the intake stage, with the intake air and in compressing it by retarding the closing of the intake valve. A non-return valve is accommodated in the intake conduit and said gas reserve is contained in the space between the intake valve and the non-return valve.

Diesel engine exhaust cleaner and burner

Abstract: An arrangement of dual element alternate flow exhaust cleaner and burner device for diesel engines is disclosed which provides trapping of particulates in the engine exhaust gases by their passage through either of the two elements. Collected particulates of carbon and other combustibles in the other nonactive element are electively incinerated by excess air or oxygen containing gas heated by a suitable burner or heater device. The incinerated products from the inactive element are redirected into the exhaust stream to pass through the active element for the cleansing of particulates remaining from the burnoff process before discharge.

Fuel flow control valve assembly

Abstract: A plurality of fuel valve injectors for a diesel engine combustion chamber in which a fuel flow control valve assembly having a high pressure fuel inlet is intermittently pressurized, and a low pressure supply pump inlet connected to a fuel pressurization chamber and to a prechamber fuel injector, the high pressure fuel moving a plunger to unseat a ball valve and pressurize the fuel to the injector to inject fuel through it, the stroke of the plunger being determined by the spacer, seating of the ball valve against a seat terminating flow to the injector, continued pressurization in inlet then opening the pressure relief mechanism of the main chamber injector.

Diesel fueled engine coolant heater

Abstract: A diesel fueled engine coolant heater for vehicles powered by a liquid cooled diesel engine. The heater is adapted to burn diesel fuel ordinarily carried by the vehicle. All electrical components of the system are powered by the vehicle electrical system. The heater supplies a source of thermal energy for engine coolant fluid in order to provide for rapid starting of the vehicle engine in cold temperatures and, if needed, to provide heat for the passenger compartment of the vehicle while the vehicle engine is stopped.

Exothermic injector adapter

Abstract: An exothermic injector adapter that allows a light weight gasoline engine to operate with the efficiency of a diesel engine. The adapter includes a body, a ceramic sleeve, a retainer, ground wires, power supply wires and a catalytic deflector. The adapter is used with any type of diesel fuel injector to replace the spark plug. It utilizes a heated catalytic deflector in close proximity to the outlet of a fuel injector to ignite the fuel charge efficiently. The catalyst used is exothermic or heat producing under certain conditions and has the ability to fracture the heavy and complex hydrocarbon molecules found in most automotive and diesel fuels. The catalyst is plated to the deflector in a porous configuration so that it has colloidal sized crystals. The catalytic deflector is electrically preheated to its level of exothermic activity. Hydrocarbon fuels break into smaller components upon contacting, the catalytic deflector to create additional heat, which obviates the need for further electrical heating during the operation of the engine.

Viscosity compensated fuel injection system

Abstract: An apparatus and method for supplying a predetermined volume of liquid fuel (20) to a cylinder of a diesel engine (10) is provided. A storage tank (22) stores a column of the liquid fuel (20) in a storage area (24). A position sensor (36) transmits an analog signal proportional to the height of the fuel (20) in the tank (22). A pressure transducer (32) disposed at the bottom of the storage area (24) transmits an analog signal corresponding to the static fluid pressure at the bottom of the storage area (24). A temperature transducer (56) disposed along a fuel rail (16) transmits an analog temperature signal to an electronic fuel injection computer (14). The computer (14) converts the analog height signal, the analog temperature signal and the analog pressure signal into digital values and mathematically divides the resulting digital values of height and pressure to obtain a digital value for the fuel density. A programmed ROM (72) of the computer (14) produces an output binary signal representative of a predetermined viscosity based on the instantaneous values of the temperature and the density of the fuel (20) over a range of values of the density and the temperature. The ROM (72) generates a three-dimensional surface representing values of viscosity based upon the temperature and the density. The output binary signal of the ROM (72) is used by the computer (14) through a diesel output control (11) to control a metering solenoid (13) of a fuel injector (12) which injects fuel into a cylinder of the engine (10).

Diesel engine glow plug energization control device

Abstract: A glow plug or plugs for a Diesel engine is energized directly or indirectly through the normally closed contacts of a thermally operated switch, preferably a bimetal switch, in thermal communication with the engine and a local electric heater that is energized by the same source as the glow plug and controlled in unison with the glow plug. The bimetal switch is arranged to switch off at a temperature of the order of 80° C. which, at an initial engine temperature of the order of -18° C., permits the glow plug to heat to the order of 900° C. The hysteresis in the bimetal switch is arranged to close the switch when the glow plug has cooled to the order of 810° C., thus the glow plug is cycled between the order of 800° C. and 900° C. It has been found that the glow plug temperature rise at elevated temperatures is substantially less than proportional to heat input. As a consequence, the effect of lower engine temperature is to produce increased glow plug temperature less than proportional to the bimetal temperature rise over engine temperature prior to switch opening, and the effect of increased engine temperature is to lower the glow plug temperature less than in proportion to the lesser bimetal temperature rise over engine temperature. With proper selection of the bimetal switch characteristics, the variation of glow plug temperature with engine temperature substantially matches the engine requirement for ease of start. Further, the glow plugs are initially heated at a very rapid rate and reach temperatures suitable for engine crank more quickly than with conventional, continuous, glow plug energization.

Electronic digital governor

Abstract: The present invention relates to an electronic digital governor for controlling the RPM of an engine. The governor is comprised of a clock generator which includes a clear pulse generator and a latch pulse generator. A sensor is provided for receiving a train of pulses whose number per unit time is proportional to the RPM of the engine. A counter is provided connected to the sensor for counting the number of pulses in the train of pulses. The count is carried out between consecutive clear pulses fed to the counter from the clear pulse generator. A latch is provided connected to the counter for storing a count accumulated between consecutive clear pulses. The latch is controlled by latch pulses from the latch pulse generator. The time duration between consecutive clear pulses and consecutive latch pulses is the same and is equal to a predetermined time period T. A comparator is provided which has a first input connected to the latch and a second input connected to a switch which is manually controllable to enter an upper bound RPM value. The comparator compares the stored count in the latch with the upper bound RPM value and activates a relay if the stored value is greater than the upper bound RPM value. An electromechanical device is provided which is controllable by the relay for controlling the RPM of the engine to reduce the RPM below the upper bound RPM value. The present invention relates to a digital governor and tachometer. The present invention can be used to control the speed of rotation of an internal combustion engine. One embodiment of the present invention can be used in conjunction with the vacuum governor of an engine which is standard equipment on the engine, for accurately controlling the speed of the engine, in applications where the engine is, for example, driving a hydraulic pump. Existing mechanical type spinner governors cannot maintain the speed of rotation of an engine to protect, for example, a hydraulic pump load from damage due to speed overshoot. The movable parts of the mechanical governor are susceptible to breakdown and wear and maintenance costs are high. The electronic digital governor is virtually maintenance free. There are no moving parts to wear and the accuracy attainable is far superior to the mechanical governor. The governor according to the present invention senses the revolutions of an engine by being directly connected to the distributor of the engine's ignition system. If the device is attached to a diesel engine which does not have an ignition system, a pulse generator must be provided which generates a series of pulses, the number per unit time being proportional to the RPM of the engine. The digital governor of the present invention receives the pulses from the engine being controlled. These pulses are fed through a shaper and filter which produces at its output a series of pulses having a square shape and a predetermined amplitude. The number of these pulses is equal to the number of pulses generated by the engine. The pulses are fed to a counter and latch circuit which counts and stores the number of pulses counted over a predetermined time period. The time period is adjustable and is a function of the number of cylinders of the engine. The engine operator can set the governor to control the engine between upper and lower engine speeds. This is accomplished by dialing into the governor via a series of tumble switches, an upper RPM value above which the speed of the engine is not to exceed and a lower RPM value below which the speed of the engine is not to fall. At the end of each time period the governor compares the pulse count in the latch circuit with a pulse count corresponding to the speeds of the upper and lower bounds to which the governor is manually set. If the actual pulse count indicated that the speed of the engine is higher than the upper bound engine speed the comparator actuates a first eletromechanical device which is connected to the engine to reduce the fuel flow to the engine thereby reducing the RPM of the engine. If the actual count representing the speed of the engine is below the lower bound engine speed, the comparator actuates a second electromechanical device which is connected to the engine to increase the fuel flow thereby increasing the RPM of the engine. When the count representing engine speed falls within the count represented by the upper and lower bound of engine speed manually introduced into the governor, the comparator does nothing. A digital display may be connected to the output of the latch. If the time period is correctly chosen, the count in the latch is directly decodable into RPM so that the display will represent the current RPM. This display and the output of the comparator is, of course, updated every time period. One embodiment of the present invention controls only the upper RPM of the engine. In other words, the governor has only an upper value. Such a governor can be used when total speed control is not necessary but when RPM overshoot is a problem. The upper bound governor eliminates this problem of engine RPM overshoot. In accordance with the present invention there is provided an electronic digital governor for controlling the RPM of an engine comprising: clock generator means including a clear pulse generator and a latch pulse generator; a sensor for receiving a train of pulses whose number per unit time is proportional to the RPM of said engine; counting means connected to said sensor means for counting the number of pulses in said train of pulses, said count being carried out between consecutive clear pulses fed to said counter by said clear pulse generator; latch means connected to said counting means for storing a count accumulated between consecutive clear pulses, said latch being controlled by latch pulses from said latch pulse generator, the time duration between consecutive clear pulses and consecutive latch pulses being the same and equal to a predetermined time period T; comparator means having a first input connected to said latch and a second input connected to a switching means which is manually controllable to enter an upper bound RPM value, wherein said comparator compares said stored count with said upper bound RPM value and activates a relay if said stored value is greater than said upper bound RPM value; and an electromagnetic device, controlled by said relay for controlling the RPM of said engine to reduce said RPM below said upper bound RPM value.

Diesel exhaust aerosol particle size distributions: comparison of theory and experiment

Abstract: Particle size distributions have been measured in the exhaust of a single cylinder Onan diesel engine using an electrical aerosol analyzer. These measurements give volume mean diameter for the exhaust particles of about 0.1 ..mu..m. Other investigators have shown that the particles found in diesel exhaust consist of agglomerates of very small primary particles (about 0.025 ..mu..m diameter) and may contain condensed hydrocarbons. A mathematical model has been constructed to determine the particle size distributions which will result from the growth of the primary particles by coagulation. The coagulation equation was solved numerically for an expanding stratified system. The model indicates that the inhomogeneity characteristic of stratified combustion can explain the rapid growth of the primary particles into the larger particles observed in diesel exhaust.

Investigation of a Diesel Exhaust Aerosol

Abstract: This paper describes a study of the exhaust aerosols produced by a single cylinder Onan diesel engine using a rapid dilution sampling system. Diluted exhaust aerosols were analyzed with an electrical aerosol analyzer (EAA) and a transmission electron microscope. Mass concentrations of particulate matter were determined by gravimetric filter analysis. Volume mean diameters observed with the EAA were about 0.1 micrometer. Mass concentration measurements made with filters were in qualitative agreement with those calculated from the aerosol volume concentrations measured with the EAA. /SASI/

Recirculated exhaust gas control device for use in a diesel engine

Abstract: The present invention is directed to a to a diesel engine comprising a throttle valve disposed in an intake passage, which gradually opens in accordance with an increase in the level of the load of the engine. A recirculated exhaust gas conduit is also provided for recirculating a partial amount of the exhaust gas into the intake passage located at the downstream side side of the throttle valve so that the exhaust gas recirculation ratio could be reduced in accordance with an increase in the level of the engine load. In addition a solenoid valve is disposed in the recirculated exhaust gas conduit for stopping the recirculating of the exhaust gas when the engine is being operated under a heavy load.

Health effects associated with diesel exhaust emissions, literature review and evaluation

Abstract: Engineering tests have shown a significant improvement in fuel economy in light duty vehicles equipped with diesel engines versus those equipped with gasoline engines. Automobile manufacturers are considering a major program for conversion to diesel engines in the automobile fleet by 1985. Available studies show rather large differences in emissions from diesel engine exhausts as opposed to gasoline engine exhaust. Conversion of a major portion of the automobile fleet to diesel engines may significantly change the ambient concentrations of both regulated and unregulated pollutants, and hence the potential human exposure pattern. Such changes may impact upon public health, and consequently require changes in air quality standards, and/or new emissions or air quality standards. An assessment of the current state of knowledge regarding the health effects from diesel exhaust emissions, and the identification of major research needs, are important factors which must be considered by the EPA under the 1977 Amendments to the Clean Air Act. In order to accomplish this objective, the following information on diesel emissions has been reviewed in this document: physical and chemical characteristics; biological effects in animals and man; epidemiologic studies; knowledge gaps; and research needs.

Methanol vaporization and injection system for internal combustion engine

Abstract: An engine equipped with an alcohol vaporization injection system operates as a four stroke cycle diesel engine that transfers the heat of exiting exhaust gases and cylinder head walls to the fuel the engine runs on alcohol. The alcohol becomes vaporized and its pressure is high enough so that when a valve is opened between the high pressure fuel line and the combustion chamber (when it is at the peak of its compression ratio) enough alcohol will enter the combustion chamber to allow proper combustion. The overall advantages to this type of alcohol vaporization injection system is that it adds relatively few new mechanisms to the spark ignition four cycle internal combustion engine to enable it to operate as a diesel engine with a high thermal efficiency. This alcohol injection system exploits the engine's need for greater volumes of alcohol caused by the alcohol's relatively low heat of combustion (when compared to gasoline) by using this greater volume of fuel to return greater quantities of heat back to the engine to a much greater degree than other fuels can.

Diesel engine lube filter life related to oil chemistry

Abstract: A three-year investigation was conducted to determine the cause of oil filter plugging in diesel engines. Laboratory, engine, and field tests showed that filter life does not correlate with filter media areas having highly dispersant oils. The oil holds several pounds of contaminant which is finely suspended until dump-out or agglomeration begins. Once agglomeration starts, it proceeds at a high rate, resulting in rapid filter plugging. Agglomeration or contaminant particle growth in oil depends on soot content, pH, level of oxidation products, presence of coolant or moisture, and oil additive chemistry. Filter analysis can be useful in solving field problems; in some cases, such analysis provides more information than oil analysis since the filter has stripped oil of problem evidence. Filters plug by six mechanisms (impaired dispersancy, excessive oil contamination, absorption/filtration of oxidation products, additive precipitation, gel formation, and wear debris). Water and coolant react with oil to precipitate additives, form gels or emulsions, and destroy oil dispersancy. Oils vary greatly in their water tolerance, and oil sump temperatures in winter during idle or stop-and-go service range from 120 to 170 degrees F. Blow-by condensate from a four-cycle diesel engine is extremely acidic, having pH values as low as 0.4. Small amounts of coolant in oil are difficult to detect with existing methods. Coolant evaporates, is removed by filters, forms gels with oil additives, and undergoes other reactions in the crankcase. Sodium level of filter paper ash is the most reliable means of detecting coolant leakage. Engine maintenance, not filter capacity, is the limiting factor on oil drain intervals. Filter plugging is a symptom of an engine or oil problem. Precipitated oil additive material imbedded in bearing overlay may cause overlay removal and make the bearing more susceptible to wear and corrosion. American Petroleum Institute classifications for diesel lubricants are inadequate because they have no provision for testing water tolerance nor the ability to measure wear and filter plugging with extended drains under winter operating conditions.

Anti-stall device in a diesel engine

Abstract: An anti-stall device for an internal combustion engine provided with a fuel injection pump having a fuel control rack and a governor mechanism connected to the fuel control rack and which has a speed control lever, comprising: a circuit for generating a dc voltage in proportion to the rotational speed of the engine; a circuit for comparing and amplifying an output voltage of the dc voltage generating circuit and a reference voltage corresponding to the idling speed of the engine; a timer circuit for receiving outputs of the comparing and amplifying circuit as inputs to generate outputs for a predetermined period of time; and an electromagnetic actuator for utilizing the outputs of the timer circuit to drive said fuel control rack in a fuel quantity increasing direction.

Fuel injection device for compression ignition engine

Abstract: A fuel injection device for a Diesel engine provided in one combustion chamber thereof with a plurality of injection nozzles and as many plunger pumps; which device is adapted so that the time intervals at which the plurality of injection nozzles inject fuel into the combustion chamber are automatically optimized in accordance with the variable conditions under which the engine is put to operation, whereby the formation of nitrogen oxides in the exhaust gas of the engine is controlled without entailing any decline in the engine output

The Development and Application of Ferrography to the Study of Diesel Engine Wear

Abstract: Ferrographic oil analysis of wear measurement is compared with both the radioactive tracer method and spectroscopic oil analysis, and is described in depth. Metallic wear debris is magnetically separated from a lubricant sample, systematically arranged according to size on a glass substrate, and examined by either a scanning electron microscope or transmission electron microscope. Ferrography is easily adaptable to either laboratory or field analysis. Its disadvantage is that it cannot detect the soluble portion of wear which is often due to corrosion. The technique is described in detail. Test data of the ferrographic oil analysis technique made with a direct injection, four-cycle, turbocharged diesel engine show that ferrography is sensitive enough to indicate changes in engine operating conditions. Data indicate operating time on engine oil for steady state engine operation to approach finite concentrations with time. Engine oil filtration is beneficial. Ferrography is shown to be the most versatile method of analyzing severe wear and detecting failure.

Physical size distribution characterization of diesel particulate matter and the study of the coagulation process

Abstract: Diesel particulate matter in both the diluted and undiluted state is subject to the processes of coagulation, condensation or evaporation, and nucleation which causes continuous changes in its physical characteristics. The Electrical Aerosol Analyzer (EAA) is used to measure the diesel particle size distribution in the Michigan Technological University dilution tunnel for a naturally aspirated direct-injection diesel engine operated on the EPA 13 mode cycle. The design and development of accurate and repeatable sampling methods using the EAA are presented. These methods involve both steady-state tunnel and bag measurements. The data indicate a bimodal nature within the 0.001 to 1 millimicron range. The first mode termed the "embryonic mode" has a saddle point between 0.005 to 0.015 millimicron and the second mode termed the "aggregation mode" lies between .08 to .15 millimicron for the number distribution. The particle concentration decreases with time and the resulting size distribution function approaches an asymptotic steady-state solution indicating the self-preserving nature of particulate size distributions. Coagulation constants have been calculated for the diesel particles and are compared to theoretical values in the literature.

Two-stroke cycle diesel engine

Abstract: A two-stroke cycle diesel engine having at least one two-stroke cycle power cylinder-piston assembly incorporating uniflow scavenging and having two horizontally opposed pistons, at least first and second scavenging ports and two crankcases which may perform crankcase compression; a pump assembly including at least one scavenging pump cylinder-piston assembly of the reciprocating type which is separate from and is driven by the power cylinder-piston assembly; a scavenging air introducing device which introduces scavenging air compressed by the pump assembly to the first and the second scavenging ports through first and second passage systems, respectively; and a fume generating device incorporated in the second passage system and supplying fuel mist in an initial part of the air supplied through the second passage system; wherein the fume is supplied as stratified with exhaust gases so as to be heated by the exhaust gases toward decomposition and then the first passage system is interrupted before the pump assembly reaches its top dead center so that thereafter the scavenging air compressed by the pump assembly is all supplied to the second scavenging port thereby generating strong swirl flows in the power cylinder.

Electronic-mechanical governor for diesel engines

Abstract: A governor for use in a diesel engine which comprises an integral combination of a centrifugal governing mechanism mainly constituted of a flyweight unit connected to the driving shaft of the diesel engine and an electronic governing mechanism mainly constituted of an electromagnetic actuator including an electromagnetic coil and a plunger connected to a fuel control rack. In said electronic governing mechanism, the plunger is connected to the fuel control rack via a coupling means with a built-in Angleichung spring for adjusting the rate of fuel supply to a proper value in response to a change in the engine speed, while at high engine speeds said centrifugal governing mechanism is adapted for connection to said fuel control rack via a lever-rod coupling means to transmit the opening motion of the flyweight unit via said lever-rod coupling means to the fuel control rack thereby to move the fuel control rack in the fuel supply-decreasing direction.

Multi-cylinder diesel engine

Abstract: A multi-cylinder supercharged diesel engine with low compression ratio, in which for starting and possibly at partial load operation a number of the cylinders are operated as a compressor and the compressed air produced by the same is fed to the remaining cylinders operating as an engine in addition to the combustion air sucked-in by the latter to achieve sufficient ignition conditions. One or several intermediate storage devices for the compressed air are provided which are connected with the cylinders operating as the compessor by way of valves adapted to be closed and with the cylinders operating as the engine by way of valves controlled in dependence on the piston position during the suction stroke and/or compression stroke of the corresponding cylinder operating as the engine.