Apparatus for controlling the recirculated exhaust gas quantities and the injection quantity in auto-igniting internal combustion engines
An apparatus is proposed which serves the purpose of controlling the exhaust gas recirculation quantity and the injection quantity in auto-igniting internal combustion engines. In this apparatus, an arbitrarily actuatable throttle valve is provided in the intake manifold, downstream of which a control pressure is withdrawn from the intake manifold and used to actuate a pneumatic adjustment device which determines the position of the quantity adjustment device of a fuel injection pump. This control pressure simultaneously serves to actuate an exhaust gas recirculation valve and acts counter to the force of a restoring spring in the work chamber of a second pneumatic adjustment device. Thus, during idling and at full-load of the engine, little exhaust gas or none at all is recirculated and at mediumload and rpm the exhaust gas recirculation quantity is controlled in accordance with the induced air quantity, that is, according to load and rpm; at the same time, in the same sense, the suction pressure which actuates the quantity adjustment device is a standard for load and rpm, that is, for the induced air quantity. Thus with increasing suction pressure less fuel is injected, and more exhaust gas is recirculated, and at a desired high load level the power output of the engine is not impaired by exhaust gas recirculation.
- Assignee:
- Bosch, Robert Gmbh (Germany, Federal Republic Of)
- Patent Number(s):
- US 4304209
- OSTI ID:
- 5474689
- Resource Relation:
- Patent Priority Date: Priority date 15 Nov 1978, Germany, Federal Republic of (F.R. Germany); Other Information: PAT-APPL-084701
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
EXHAUST RECIRCULATION SYSTEMS
CONTROL SYSTEMS
FUEL INJECTION SYSTEMS
INTERNAL COMBUSTION ENGINES
EXHAUST GASES
FUEL-AIR RATIO
POLLUTION CONTROL EQUIPMENT
ENGINES
EQUIPMENT
EXHAUST SYSTEMS
FLUIDS
FUEL SYSTEMS
GASEOUS WASTES
GASES
HEAT ENGINES
WASTES
330100* - Internal Combustion Engines
330700 - Advanced Propulsion Systems- Emission Control