Showing papers on "Secondary air injection published in 1983"

Exhaust gas recirculation system for diesel engine

Abstract: An exhaust gas recirculation (EGR) system for a diesel engine comprising an EGR control valve for regulating the flow of exhaust gases to be recirculated from an engine exhaust system back to an engine air intake system. When the exhaust gas recirculation is to be interrupted, the EGR control valve is closed a predetermined time after the opening of a throttle valve used in the air intake system for regulating the flow of air towards the engine. For this purpose, delay valves are utilized in association with the throttle valve and the EGR control valve.

Particle removing system for an internal combustion engine

Abstract: An exhaust passage extends from an internal combustion engine to conduct exhaust from the engine. A filter is disposed in the exhaust passage to catch particles in the exhaust. A burner is disposed in the exhaust passage at a position upstream of the filter. The burner receives a mixture of air and fuel and burns the mixture to burn off the particles deposited on the filter. The burner includes a vaporizing member and a guide member.

Air ventilation and pollution cleaning system

Abstract: An air ventilation and cleaning system for cooking equipment having an exhaust hood disposed thereover in a building having a heating-ventilating and air-conditioning system for treating the air in the building. The exhaust hood includes a collection chamber and an exhaust chamber with an initial filter means mounted therebetween. An exhaust fan draws air loaded with cooking vapors, odors, fumes, smoke and other pollutants collected in the collection chamber through the filter means and the exhaust chamber, and out through an exhaust passage provided with a water-wash filter and a final filter, and then to the atmosphere. A source of fresh air provides a predetermined amount of fresh makeup air to the collection chamber. A temperature control unit is connected to another source of fresh air, and to the return air duct of the heating-ventilating and air-conditioning system of the building or a room in the building, for providing a combination of fresh air and tempered air to an air curtain passage for forming an air curtain along the front side of the exhaust hood.

Air ventilation system

Abstract: An air ventilation system for cooking equipment having an exhaust hood disposed thereover in a building having a heating-ventilating and air-conditioning system for treating the air in the building. The exhaust hood includes a collection chamber and an exhaust chamber with a filter means mounted therebetween. An exhaust fan draws air loaded with cooking vapors, odors, fumes, smoke and other pollutants collected in the collection chamber through the filter and the exhaust chamber and out through an exhaust passage to the atmosphere. A source of fresh air provides a predetermined amount of fresh makeup air to the collection chamber. A temperature control unit is connected to another source of fresh air, and to the return air duct of the heating-ventilating and air-conditioning system of the building or a room in the building, for providing a combination of fresh air and tempered air to an air curtain passage for forming an air curtain along the front side of the exhaust hood.

Cleaner control for diesel engine exhaust gases

Abstract: An exhaust cleaner system for a diesel engine comprising a cleaner having a filter and also having upstream and downstream compartments on respective sides of the filter, carbon particulates in the exhaust gases from the engine being trapped in the filter as the exhaust gases flow through the cleaner, a burner for producing a high temperature combustion gas necessary to elevate the temperature of the exhaust gases, an air supply device for supplying air to the burner, a fuel supply device for supplying fuel to the burner, and an air pressure regulator for increasing the air supply pressure in correspondence with the increase of the exhaust gas pressure upstream of the filter.

Exhaust brake valve

Abstract: The disclosure illustrates an exhaust brake valve positioned between a divided section exhaust manifold of an internal combustion engine and the divided flow entry to a turbine wheel of a turbocharger used in conjunction with the engine. The valve comprises a closure member displaceable between two positions, the second of which provides separate but free flow from the exhaust manifold sections and the corresponding divided flow entry of the turbine. The closure member, when displaced to the first position, blocks flow to the turbine, but at the same time interconnects the sections of the exhaust manifold. In this condition the engine acts like a compressor working against a blockage to provide a retarding effect, but the manifold interconnection minimizes peak pressure pulses to prevent engine valve bounce.

Apparatus for totally recycling engine exhaust gas

Abstract: A device designed to use exhaust gas discharged out of an engine combustion chamber by dissociating chemical substances contained in the exhaust gas such as CO, CO2, NOx, HC, etc, in an exhaust gas molecule dissociating tube and drawing components of the exhaust gas, oxygen in particular, again into the engine combustion chamber The device is so constructed as to collect dust including the carbon component of the exhaust gas in a cyclone drum for removal from the exhaust gas, which allows all of the engine exhaust to be recycled without releasing it in the atmosphere The device is utilizable with various engines, eg, gasoline engines, diesel engines and so on, and well-suited to mass production on account of its simple, compact and lightweight construction

Diesel exhaust cleaner with glow plug igniters and flow limiting valve

Abstract: An exhaust cleaner system for use in the exhaust system of a diesel engine is provided with a particulate filter positioned in a trap housing with an exhaust inlet thereto and an exhaust outlet therefrom. A pair of exhaust ducts are positioned in the inlet end of the exhaust outlet whereby to define, in effect, three separate exhaust flow zones through the filter and a flow limiter valve is operatively positioned to sequentially control flow through the exhaust ducts. Glow plugs are located so as to extend into the zones of the filter associated with the exhaust ducts to initiate incineration of particulates during reduced exhaust flow conditions as controlled by the flow limiter valve.

Exhaust system control apparatus in an internal combustion engine

Abstract: An exhaust system control apparatus for the exhaust of an internal combustion engine which is particularly useful on two-cycle engines. The exhaust system includes a subsidiary chamber connected to the normal engine exhaust passage with a valve for opening and closing communication between the chamber and exhaust passage to change the pressure wave at the engine cylinder exhaust port to provide optimum performance at high and low speeds. The chamber valve is operated rapidly by a pneumatic actuator supplied with compressed air from one or more of the sources disclosed, namely, a belt driven or electric air compressor and piston and cylinder devices extending between or forming the suspension components of a two wheeled vehicle. A pneumatic valve is operated by engine speed sensing means to supply or release the pressurized air to the actuator at a predetermined engine speed.

Exhaust-gas control system for internal combustion engines with a turbocharger and a catalytic converter for exhaust-gas detoxification

Abstract: An internal combustion engine (10) with a turbocharger (20) and an exhaust pipe (13) is provided with an exhaust-gas control system. A turbine (21) of the turbocharger (20) is arranged in the exhaust pipe (13) and is driven by the exhaust gases. The exhaust-gas control system comprises a catalytic converter (35) which is arranged downstream of the turbine (21) in the exhaust pipe (13) and serves to clean or detoxify the exhaust gases. A temperature sensor (75) serves to sense the temperature of the converter (35). The control system furthermore comprises a mechanism (42) which makes it possible to control the exhaust-gas flow in such a way that at least part of the exhaust gases by-passes the turbine (21) before entering the converter (35). A device (76, 50) controls the mechanism (42) in accordance with the sensed temperature of the converter (35) in such a way that the exhaust gases by-pass the turbine (21) if the sensed temperature is below a predetermined value.

Exhaust gas recirculation system for an internal combustion engine

Abstract: An exhaust gas recirculation system is applied to an internal combustion engine having a combustion chamber and an exhaust passage conducting exhaust gas from the combustion chamber to the atmosphere. The system includes a first mechanism provided to recirculate the exhaust gas through the combustion chamber. A second mechanism is associated with the first mechanism to adjustably determine the percentage of the exhaust gas recirculated. A sensor detects the average pressure in the exhaust passage. In response to the detected exhaust pressure, a third mechanism controls the second mechanism in such a manner that the percentage of the exhaust gas recirculated is independent of the variations in the average pressure in the exhaust passage.

Filter regenerating apparatus for internal-combustion engine

Abstract: PURPOSE:To regenerate filter efficiently by an inexpensive apparatus, by feeding air to a filter disposed in an exhaust system, and at the same time producing microwaves in regenerating the filter. CONSTITUTION:Exhaust gas discharged from an engine 1 is carried to a filter 5 via an exhaust branch pipe 3a, and after particulates contained in the exhaust gas are captured and removed by the filter 5, it is discharged to the atmosphere via a muffler 13. In regenerating the filter 5 when it has caused clogging, a branch pipe 3a is closed and a branch pipe 3b is opened by an exhaust-gas switching valve 15 to carry exhaust gas to the muffler 13 via the pipe 3b bypassing a muffler casing 4. At the same time, air supplied from an air pump 16 is carried into the casing 4 by opening an air switching valve 18 and a microwave oscillator 8 is set into operation. With such an arrangement, the filter 5 is regenerated by heating and burning only the particulates contained in the exhaust gas by the function of microwaves.

Exhaust relief system

Abstract: The engine (11) of a stern drive (10) is provided with a vacuum relief valve (28) to relieve any vacuum which may occur in the exhaust manifold (16), thus preventing water from entering the engine through the exhaust system. The relief valve (28) is connected to allow one-way flow from the intake manifold (15) to the exhaust system, thus providing an essentially closed system.

Exhaust brake system

Abstract: PURPOSE:To augment an effect of an exhaust brake by providing a sluice valve with an escape hole in an exhaust passage inside a cylinder head of an engine and closing said valve at the time of the exhaust brake operation. CONSTITUTION:A sluice valve 42 with an escape hole 43 is provided in the middle of an exhaust passage 21 inside a cylinder head. The sluice valve 42 is provided with an air cylinder 44, to which a compressed air is supplied from an air tank through a solenoid three-way valve at the time of exhaust brake operation, and the valve 42 is closed. When a piston 31 starts to rise from the bottom dead point following the abovementioned closure, since an exhaust valve 16 is open, working gas in a cylinder 32 including an exhaust space 61 is compressed and the pressure is raised. When the piston 31 approaches the top dead center, the piston slows down and the gas flows out of the escape hole 43. Then the pressure in the cylinder 32 starts lowering, and lowers to the extent of the exhaust pressure at the top dead center.

Air injection bath for therapeutic use

Abstract: This invention relates to an air injection bath for a therapeutic use, the bath comprising a tub having in its base air injection nozzles supplied by a turbine, heating and ozonizing devices being disposed in a box outside the safety perimeter of the bath, the box having an electric and electronic control system receiving air pulses from a mobile control grip or from a stationary control panel disposed near the user for controlling various operations for air injection, heating of the injected air, ozone injection, the direction and speed of air injection into the bath and the starting and stopping of the complete facility.

Exhaust system air introduction device

Abstract: A device for introducing air into the exhaust system of a V-type motorcycle engine. The device includes an air manifold advantageously positioned within the V of the engine with passages extending to each exhaust passage adjacent each exhaust port. A control valve run by vacuum admits air to the manifold while reed valves control the passageways to each exhaust passage. The portion of the passage extending through the cylinder head in one embodiment includes a simple bore in tangential intersection with the exhaust passages. A pipe is positioned within the bore which has nozzles therethrough for proper introduction of air to the exhaust.

Engine exhaust system and supporting apparatus for two-wheeled/three wheeled vehicle

Abstract: An exhaust system for a vehicle is made sufficiently long and yet allows the muffler to be located relatively close to the engine by curving the exhaust pipe about a cooling fan provided for the engine. The arrangement also facilitates mounting of the exhaust system to the engine and vehicle bodies at a fewer number of support points.

Secondary-air supplying apparatus for engine with turbocharger

Abstract: PURPOSE:To improve the accelerating performance of an engine having a fuel supply interrupting means, by preventing after-burning and adverse influences accompanied thereby by providing a secondary-air supply control means for supplying secondary air at the portion of an exhaust passage located on the upstream side of a turbine. CONSTITUTION:An engine 1 has a turbocharger 6 which consists of a turbine 6a and a blower 6b. When operation of the engine 1 is shifted to the decelerating mode with closing of a throttle valve 9 and the engine speed is in its high-speed region, output of a fuel control signal (a) from a control circuit 11 is stopped and a fuel injection valve 10 stops injection of fuel. In this state, a driving signal (f) is given and a three-way changeover valve 18 is operated to supply secondary air from an air pump 17 to an exhaust passage 5 at the portion thereof located on the upstream side of the turbine 6a. By employing such an arrangement, it is enabled to prevent after-burning and adverse influences to the exhaust pipe and a catalytic converter accompanied by the after-burning.

Apparatus for improving gasoline consumption, power and reducing emission pollutants of internal combustion engines

Abstract: An apparatus used in combination with a gasoline powered internal combustion engine. The apparatus allows a fuel-air inlet charge to be applied into the engine combustion chamber that is comprised of an optimized mixture of gasoline, air and unburned hydrocarbon exhaust gases. The apparatus is comprised of four elements that are synergistically combined with existing engine and engine-related components. The four elements include a thermic reactor, a catalytic gas injector, a thermic reactor exhaust filter, and a fuel regulator/restrictor. The thermic reactor supplies heated clean air and exhaust gases to the catalytic gas injector where the clean air and exhaust gases are mixed. The mixed gas together with a regulated quantity of gasoline supplied from the fuel regulator/restrictor are applied to the carburetor or fuel injection system. The fuel-air mixture improves the thermal efficiency of the engine, thereby reducing fuel consumption, and reducing air-contaminating exhaust emissions.

Orifice of exhaust gas recirculation system

Abstract: In an exhaust gas recirculation system for an internal combustion engine, orifices disposed in a passage for recirculating the exhaust gas is made of a sheet of a bimetal or other material capable of changing from a normal shape to a deformed shape when the heat of the exhaust gas is applied, in order to prevent carbon contained in the exhaust gas from depositing on the orifices.

Two-stage supercharging type internal-combustion engine

Abstract: PURPOSE:To aim at compactification in each air cooler, by forming the air cooler for a high-pressure stage supercharger and the air cooler for a low-pressure stage supercharger solidly together. CONSTITUTION:An exhaust turbine 4A of a high-pressure stage supercharge 4 is driven by exhaust E out of an exhaust manifold 8 and thereby a blower 4B on the same axis is rotated. Next, an exhaust turbine 3A of a low-pressure stage supercharge 3 is driven by the exhaust E out of the exhaust turbine 4A and thereby a blower 3B on the same axis rotated whereby air A is pressurized as shown in A1 (see illustration) at the blower 3B of the low-pressure stage supercharger 3 and led into the blower 4B of the high-pressure stage supercharger 4 by way of a low-pressure stage cooler 5A. Then, the pressurized air A2 is led into a combustion chamber from a suction manifold 7 after being cooled at a high-pressure stage air cooler 5B.

Fuel cut-off device for fuel injection pumps for multi-cylinder internal combustion engines

Abstract: Three way valves forming a fuel cut-off valve are arranged across respective injection pipes connected to injection nozzles associated with preselected cylinders of the engine. In a first valve position, the three way valves connect the injection pump body or bodies of the fuel injection pump to the respective injection pipes, and in a second valve position, they connect the injection pump body or bodies to a lower pressure zone in the pump. Preferably, the fuel cut-off valve is pneumatically operated for high speed valve position changing action.

Hydraulic driving apparatus for exhaust valve

Abstract: PURPOSE:To lower the specific fuel consumption of an engine, by reducing the work required for driving an exhaust valve by making the exhaust valve in an outwardly opened type, and introducing high-pressure work oil to the top surface of a hydraulic piston at one end of the exhaust valve at the time of closing the exhaust valve. CONSTITUTION:An exhaust valve 40 is made in a type that is opened outwards of a combustion chamber 10, and a cam 41 is made in recessed shape which decreases the lift of a roller 33 at the time of opening the exhaust valve 40. When a cam shaft 31 is turned and the roller 33 is lowered by a cam 41, pressure of work oil in a hydraulic cylinder 17 begins to drop. With increasing of the crank angle, the exhaust valve 40 begins to open, and work gas begins to flow out to an exhaust passage 19 from the combustion chamber 10. Finally, only the compressive force of a valve spring 16 is acted to the exhaust valve 40. With further increasing of the crank angle, the roller 33 is pushed upward again by the cam 41 and the pressure of work oil is raised to compress the valve spring 16, so that the exhaust vlave 40 begins to close.

Exhaust purifier for diesel engine

Abstract: PURPOSE:To obtain an exhaust purifier for feeding predetermined amount of burning air easily with low cost, by providing a throttle valve in an exhaust pipe at the upstream of filter while providing a bypath coupling between the upstream of said throttle valve and burner air inlet. CONSTITUTION:The pressure at the upstream section 3 of throttle valve is controlled by a rotatble throttle valve 5 such that required amount of O2 for combustion in burner 9 will be bypassed to the bypath 7. O2 in exhaust gas passed through bypath 7 is mixed with fuel injected through a fuel pipe 8 and burner 9 then swirled by swirler 10 and fired by firing plug 14. High temperature combustion gas will pass together with exhaust gas passed through the opening of throttle valve 5 through a ceramic filter 12 to oxidize particulates caught in ceramic filter 12 then goes to muffler 13.

Device for purifying exhaust gas from diesel engine

Abstract: PURPOSE:To obtain the titled device in which the system is compact and the cost is inexpensive by providing a filter for arresting Diesel particulates at the downstream of a catalyst converter provided with HC control means. CONSTITUTION:In a case where the exhaust air pressure within exhaust pipes 6 and 7 reaches a predetermined value or more, the regeneration of a filter 4 is necessary. Therefore, a throttle valve 2 is closed in a certain quantity to generate HC and supply HC to the catalyst converter. The temperature of exhaust air becomes increased by the reaction heat generated in the catalyst converter, and the Diesel particulates arrested by the filter 4 are burnt. In a case when the temperature of exhaust air does not reach a value required for burning the particulates, the throttle valve 2 is further closed and a large quantity of HC is generated.

Double-chambered exhaust manifold

Abstract: A double-chambered exhaust manifold with individual chambers that are connected edge to edge so as to independently pass exhaust gas flows through each. The first chamber is connected to receive an exhaust gas flow through exhaust ports of an internal combustion engine and connects to an inlet side of an exhaust driven turbine air compressor. The exhaust gas flow turns a turbine wheel that is connected to an impeller to compress the fresh air flow for passage to the engine air intake system. Exhaust from the turbine then passes to the second chamber that vents the exhaust gases into the vehicle exhaust system. The separate double-chambered exhaust manifolds are bent or otherwise contoured appropriately to fit within the space available within the vehicle engine compartment.

Liquid fuel combustion device

Abstract: PURPOSE: To restrict a local occurance of red flame or noise by a method wherein there are arranged an air cylinder communicating with an air chamber at the central part of a gasification chamber, a plurality of small diameter holes arranged at the upper part of the air cylinder and a fuel vapour guide plate spaced apart by a desired amount from the air holes to cause the fuel vapour to be guided by air injection flow CONSTITUTION: A gasification chamber 5 is arranged at the bottom part of a combustion cylinder 1 and a gasification wick 6 is stored in it The upper end of the air cylinder 7 of the gasification chamber 5 is provided with an air injection hole 8 having a diameter of 05W15mm and its outer circumference is provided with a vapour guide plate 9 The circumferential wall of the combustion chamber 10 is provided with rough air holes 11a and fine air holes 11b and in it are arranged the first flame holding unit 13 and the second flame holding unit 14 with a vertical spaced-apart relation to each other Air supplied to the upstream end of the combustion cylinder 1 flows through the air cylinder 7 having air holes made uniformly around the upper circumferential wall, so that no displacement of air flow occurs, the air is mixed well with fuel guided from the gasification wick 6 in the vapour guide plate 9 and moved in a downstream direction, resulting in that less variation in flame is found and sound generated is also quite less COPYRIGHT: (C)1984,JPO&Japio