Fuel injection system for internal combustion engines
IPC분류정보
국가/구분
United States(US) Patent
등록
국제특허분류(IPC7판)
F02M-059/36
F02M-063/02
F02M-041/16
출원번호
US-0198701
(1994-02-18)
우선권정보
DE-4304967 (1993-02-18)
발명자
/ 주소
Bonse Bernhard (Stuttgart DEX)
출원인 / 주소
Robert Bosch GmbH (Stuttgart DEX 03)
인용정보
피인용 횟수 :
5인용 특허 :
0
초록▼
A fuel injection system for internal combustion engines in which a high-pressure pump and a high-pressure reservoir is supplied with fuel at an injection pressure, from which reservoir the fuel arriving at injection is diverted as a function of time and quantity and delivered via a distributor to on
A fuel injection system for internal combustion engines in which a high-pressure pump and a high-pressure reservoir is supplied with fuel at an injection pressure, from which reservoir the fuel arriving at injection is diverted as a function of time and quantity and delivered via a distributor to one of a plurality of injection points, via two sequentially electrically controlled valves. The injection points are triggered successively by a distributor opening of the distributor. With a fuel pressure, thus held at a certain pressure, in the high-pressure reservoir, a universally controllable fuel injection system is attained in a simple way, at little effort or expense.
대표청구항▼
A fuel injection system for internal combustion engines, having a high-pressure pump, which aspirates fuel via a filling valve (18; 51, 52) into a pump work chamber (8, 49) defined by a pump piston (7, 46, 79) and feeds the fuel at high pressure via a feed valve (23) into a high-pressure reservoir (
A fuel injection system for internal combustion engines, having a high-pressure pump, which aspirates fuel via a filling valve (18; 51, 52) into a pump work chamber (8, 49) defined by a pump piston (7, 46, 79) and feeds the fuel at high pressure via a feed valve (23) into a high-pressure reservoir (24), whose pressure is held at a certain value via a pressure control unit (39, 59; 40, 41, 37); said pressure control unit has a filling valve (118, 65, 86), electrically controlled by the control unit (37), said filling valve is disposed in a fuel delivery line (17, 152, 85) and has opening and closing times which are controlled as a function of pressure in the high-pressure reservoir (24) in order to control the high-pressure supply quantity of the pump piston (7, 46, 79) of the high-pressure pump, a distributor (2, 46) is driven in synchronism with the engine, and upon its rotation successively supplies fuel via a distributor opening (31) to injection lines (33) leading to various injection valves of the engine; a first valve (29) is located in a fuel line (28, 15, 60, 33) leading from the high-pressure reservoir (24) to the distributor opening (31) and is electrically controlled by a control unit (37), a second electrically controlled valve (36) is provided downstream of the first electrically controlled valve (29) in a relief line (35) that communicates with the distributor opening (31), and that for controlling the instant of injection and the injection quantity by opening of the first electrically controlled valve (29) while the second electrically controlled valve (36) is closed, the injection onset is determined, and by opening the second electrically controlled valve (36), the injection end is determined.
Rodriguez-Amaya, Nestor; Potschin, Roger; Gruen, Jurgen; Projahn, Ulrich, Fuel injection device for an internal combustion engine having a pressure-holding valve.
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