Patent•
Fuel injection system
11 Jul 2002-
TL;DR: In this paper, the damping path is embodied such and connected in such a way to the filling path that the fuel positively displaced from a damping chamber via damping throttle in an injection event reaches the fillingpath of the pressure booster pressure chamber via the damped path.
Abstract: A fuel injection system for an internal combustion engine including a fuel injector which can be subjected to fuel at high pressure and is actuatable via a metering valve device by which the pressure in a pressure booster control chamber is controllable such that the pressure in a pressure booster pressure chamber, defined by a pressure booster piston, that can be filled with fuel from the high-pressure fuel source via a filling path in which a check valve is disposed and that is in communication with an injection valve member pressure chamber, is increased by the pressure booster piston such that an injection valve member opens for injecting fuel, whereupon fuel is positively displaced out of a damping chamber via a damping path, in which a damping throttle is disposed. To assure stable injection performance, the damping path is embodied such and connected in such a way to the filling path that the fuel positively displaced from the damping chamber via the damping throttle in an injection event reaches the filling path of the pressure booster pressure chamber via the damping path.
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Patent•
29 Oct 1999
TL;DR: In this article, the inclination of an aluminum-based swash plate is guided by a slide guide relationship between the guide holes 251 and the to-be-guided pins 23 and upon a slide support action of the rotary shaft 18.
Abstract: A swash plate 20 made of an aluminum-based material
is allowed to be inclined in the axial direction of a
rotary shaft 18 and to rotate integrally with the rotary
shaft 18 due to the engagement between guide holes 251
formed in the support arms 25 made of an iron-based
material and heads 231 of to-be-guided pins 23 made of an
iron-based material. The inclination of the swash plate
20 is guided based upon a slide guide relationship
between the guide holes 251 and the to-be-guided pins 23
and upon a slide support action of the rotary shaft 18.
The inclination-limiting protuberances 191 integrally
formed on the rotary support member 19 made of the iron-based
material come into contact with the to-be-guided
pins 23. The swash plate 20 is inclined at a maximum
angle in a state where the inclination-limiting
protuberances 191 come into contact with the to-be-guided
pins 23.
243 citations
Patent•
[...]
TL;DR: In this article, an opening sectional area of the communication hole is defined in such a manner that a fuel discharged amount decreases as an energization start time of a coil is delayed.
Abstract: Between a movable core chamber and a fuel supply passage, a needle guide slidably supports a needle fixed to a movable core. The needle guide has a communication hole which fluidly connects the movable core chamber and the fuel supply passage. An opening sectional area of the communication hole is defined in such a manner that a fuel discharged amount decreases as an energization start time of a coil is delayed. In a suction stroke, it is restricted that the movable core and the needle bounce toward the fixed core after the needle biases a suction valve toward a stopper by means of a biasing force of a second spring. A relationship between the energization start time of the coil and the fuel discharged amount is properly maintained, so that the fuel discharged amount of the high-pressure pump can be controlled correctly.
225 citations
Patent•
[...]
TL;DR: In this article, a high-pressure injection valve for directly injecting fuel into a combustion chamber of a compressed-mixture, spark-ignition internal combustion engine is described, and a slit-type flow outlet is formed between the slit-forming element and a front face of the valve seat body.
Abstract: The invention relates to a fuel-injection valve, in particular a high-pressure injection valve for directly injecting fuel into a combustion chamber of a compressed-mixture, spark-ignition internal combustion engine. Said valve is characterised in that an outlet opening (23) is provided downstream of the valve seat (20), the downstream end of said opening having a slit-forming element (30) that to a great extent closes the outlet opening (23). A slit-type flow outlet (35), through which a fuel spray can be discharged in a fan-type jet, is formed between the slit-forming element (30) and a front face (34) of the valve seat body (16).
186 citations
Patent•
27 Dec 2002TL;DR: In this article, the authors provided a GaN single crystal at least 2 millimeters in diameter, with a dislocation density less than about 10 4 cm −1, and having no tilt boundaries.
Abstract: There is provided a GaN single crystal at least about 2 millimeters in diameter, with a dislocation density less than about 10 4 cm −1 , and having no tilt boundaries. A method of forming a GaN single crystal is also disclosed. The method includes providing a nucleation center, a GaN source material, and a GaN solvent in a chamber. The chamber is pressurized. First and second temperature distributions are generated in the chamber such that the solvent is supersaturated in the nucleation region of the chamber. The first and second temperature distributions have different temperature gradients within the chamber.
92 citations
Patent•
19 Dec 2001TL;DR: In this article, a fuel-injection device with a common pressure accumulation chamber, one injector (3) per cylinder and a local pressure intensifier (4) that is allocated to each injector is presented.
Abstract: The invention relates to a pressure-controlled fuel-injection device (1). Said device comprises a common pressure accumulation chamber, one injector (3) per cylinder and a local pressure intensifier (4) that is allocated to each injector (3). A 2/2-way valve (14) is provided for metering fuel to the injector (3).
69 citations
References
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Patent•
25 May 1994
TL;DR: In this paper, a solenoid valve is used to detect the stroke moment of the needle needle as a precise signal of the commencement and termination of the injection and transmits it to the control device, where this actual value is compared with a desired value from performance characteristics and, if necessary, results in a correction of the controlling of the valve.
Abstract: A fuel-injection device has a pump working chamber (7) which can be supplied and discharged by means of a fuel line (13) provided with a solenoid valve (23). The pump working chamber (7) is connected to a fuel-injection valve (33). Control of the fuel injection is achieved by means of the opening or closing of the solenoid valve (23) during the delivery stroke of the pump piston (5). The solenoid valve (23) is controlled by a control device (51). A needle stroke transducer (61) is disposed at the nozzle needle of the fuel-injection valve (33) which, after a limit value is exceeded, detects the stroke moment of the nozzle needle as a precise signal of the commencement and termination, and therefore the quantity, of the fuel injection, and transmits it to the control device (51) where this actual value is compared with a desired value from performance characteristics and, if necessary, results in a correction of the controlling of the solenoid valve (23).
313 citations
Patent•
22 Mar 2002TL;DR: In this paper, a Ventilhohlnadel (15) is angeordnet, die eine ausere Ventildichtflache (30) aufweist, with der sie mit dem auseren Ventilsitz (107) zusammenwirkt, and so die Offnung der wenigstens einen ausesren Einspritzoffnung (10) steuert.
Abstract: Kraftstoffeinspritzventil fur Brennkraftmaschinen mit einem in einem Ventilkorper (1) ausgebildeten auseren Ventilsitz (107), der eine Konusform mit einem auseren Offnungswinkel (a) aufweist und von dem wenigstens eine ausere Einspritzoffnung (10) abgeht. Weiter ist ein innerer Ventilsitz (207) ausgebildet, der ebenfalls eine Konusform mit einem inneren Offnungswinkel (b) aufweist und von dem wenigstens eine innere Einspritzoffnung (12) abgeht. Im Ventilkorper (1) ist eine Ventilhohlnadel (15) angeordnet, die eine ausere Ventildichtflache (30) aufweist, mit der sie mit dem auseren Ventilsitz (107) zusammenwirkt und so die Offnung der wenigstens einen auseren Einspritzoffnung (10) steuert. In der Ventilhohlnadel (15) ist eine Ventilnadel (17) angeordnet, die mit einer inneren Ventildichtflache (32) mit dem inneren Ventilsitz (207) zur Steuerung der wenigstens einen inneren Einspritzoffnungen (12) zusammenwirkt, wobei die Offnungswinkel (a; b) des inneren Ventilsitzes (207) und des auseren Ventilsitzes (107) verschieden sind.
267 citations
Patent•
07 Jul 1995TL;DR: In this paper, a pressure storage (common rail) fuel injection system for an engine is provided, in which the fuel injection pressure rise response when quickly accelerating the engine is improved, engine output shortage is prevented, engine noise is reduced, and improvement is made with respect to soot generation and exhaust gas particulation.
Abstract: A pressure storage (common rail) fuel injection system for an engine is provided, in which the fuel injection pressure rise response when quickly accelerating the engine is improved, engine output shortage is prevented, engine noise is reduced, and improvement is made with respect to soot generation and exhaust gas particulation. A booster (100) is provided to boost pressurized fuel fed out from a pressure storage (36) with a directional control valve (105) for piston operation. It is switched between low pressure fuel injection in which fuel from the pressure storage (36) is fed directly to a fuel injection valve (18) for injection, and high pressure fuel injection in which fuel having been boosted by the booster (100) is fed to the fuel injection valve (18) for injection by a directional control valve (105) for fuel injection control.
127 citations
Patent•
03 Apr 1984
TL;DR: In this paper, a fuel injector of a Diesel engine is supplied with a boosted supply of fuel from a booster and operated to start and terminate a fuel injection by a hydraulically controlled nozzle needle actuator.
Abstract: A fuel injector of a Diesel engine is supplied with a boosted supply of fuel from a booster and operated to start and terminate a fuel injection by a hydraulically controlled nozzle needle actuator A valving unit is controlled to selectively communicate compressed operating fluid to the booster so that the boosted supply of fuel reaches the fuel injector The valving unit comprises a pair of poppet type valves each of which is operated by a solenoid operated pilot valve, thereby attaining high speed operation due to a high frequency of switching actions and accommodating a large flow rate of fluid A manually or automatically adjustable stop is associated with each of the poppet type valves to control the flow rate of fluid through the valve to the booster, which dictates the pressure of fuel injection from the injector
99 citations
Patent•
[...]
09 Apr 2003
TL;DR: In this paper, a double injection nozzle is formed by longitudinally arranging a first injection hole 21 and a second injection hole 22, and mounted on a circle and arranged in parallel at an interval of 0.4 mm.
Abstract: PROBLEM TO BE SOLVED: To provide a fuel injection valve capable of sufficiently obtaining the fuel spray penetration force even when a nozzle injecting diameter is reduced, and advancing the atomization of fuel spray. SOLUTION: A double injection nozzle 20 is formed by longitudinally arranging a first injection hole 21 and a second injection hole 22, and mounted on a circle. The first injection hole 21 and the second injection hole 22 respectively have a hole diameter of 0.1 mm or less, and arranged in parallel at an interval of 0.4 mm. Inlet openings 21 in, 22 in of the first injection hole and the second injection hole 22 are formed on a recessed part 14 formed on a sheet part 12.
81 citations