Fuel injection control system for a diesel engine

Details Fuel injection control system for a diesel engine Fuel injection control system for a diesel engine

1998-07-02

2000-01-25

Argenbright, Tony M.

Internal-combustion engines

Engine speed regulator

Open loop condition responsive

123357, 123478, 12356821, F02D 2108, F02D 4300, F02M 2507

Patent

active

060167882

ABSTRACT:
In a fuel injection control system, a throttle valve is provided on the intake air passage of a diesel engine and an EGR control valve is provided for recycling a part of the engine exhaust gas to the intake air system of the engine. An engine control unit (ECU) controls the intake air amount of the engine to a value corresponding to the engine operating condition by adjusting the throttle valve and the EGR control valve. Further, the ECU detects the actual intake air amount by an airflow meter disposed at the inlet of the intake air passage and determines the maximum fuel injection amount based on the engine speed and the actual intake air amount. The maximum fuel injection amount is the maximum amount of the fuel which does not generate the exhaust smoke. By restricting the actual fuel injection amount so that the actual fuel injection amount does not exceed the maximum fuel injection amount, the generation of the exhaust smoke is prevented in transient operating conditions of the engine regardless of a delay in the response of the EGR control valve.

REFERENCES:
patent: 4223654 (1980-09-01), Wessel et al.
patent: 4368705 (1983-01-01), Stevenson et al.
patent: 5377651 (1995-01-01), Sczomak et al.
patent: 5738126 (1998-04-01), Fausten

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