Adaptive lean limit air fuel control using combustion pressure s

Details Adaptive lean limit air fuel control using combustion pressure s Adaptive lean limit air fuel control using combustion pressure s

1986-12-01

1988-04-12

Argenbright, Tony M.

Internal-combustion engines

Charge forming device

Including cylinder pressure or temperature responsive means

123436, F02D 4114, F02D 4104

Patent

active

047367245

ABSTRACT:
Controlling operation of an internal combustion engine at lean air fuel ratios uses an in-cylinder pressure sensor. The in-cylinder pressure sensor is coupled to each cylinder of the engine and measures in-cylinder pressure and generates an output signal as a function of such pressure. Airflow into the engine is also sensed and both the airflow and in-cylinder pressure are applied to the fuel controller for generating a fuel injection drive signal. Compensation means coupled to the in-cylinder pressure sensor means and airflow indication means modify the fuel air command applied to the engine as a function of airflow and in-cylinder pressure. The compensation means is also coupled to the fuel controller for applying a fuel command signal to the fuel controller thereby permitting engine operation at the lean air fuel ratio limit.

REFERENCES:
patent: 3969614 (1976-07-01), Moyer et al.
patent: 4216750 (1980-08-01), Kobayashi
patent: 4391248 (1983-07-01), Latsch
patent: 4535740 (1985-08-01), Ma
patent: 4543934 (1985-10-01), Morita et al.
patent: 4622939 (1986-11-01), Matekunas

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