Air and fuel supply control systems for internal combustion engi

Details Air and fuel supply control systems for internal combustion engi Air and fuel supply control systems for internal combustion engi

1990-03-05

1992-03-17

Bertsch, Richard A.

Power plants

Fluid motor means driven by waste heat or by exhaust energy...

With supercharging means for engine

60601, F02B 3712

Patent

active

050957031

ABSTRACT:
An air and fuel supply control system for an internal combustion engine comprises a plurality of superchargers including a turbosupercharger, an intake air cutoff valve operative selectively to be open and closed respectively for opening and closing one of separated intake passages in which a compressor of the turbosupercharger is disposed, an intake air relief valve operative selectively to be open and closed respectively for opening and closing a relief passage provided for detouring the compressor of the second supercharger, a cutoff valve controller operative to control the intake air cutoff valve to be closed so that the turbosupercharger is restrained from supercharging the engine and to be open so that the turbosupercharger works for supercharging the engine, a relief valve controller operative to control the intake air relief valve to be closed before the intake air cutoff valve is opened and to be open after the intake air cutoff valve is closed, an air flow sensor for detecting intake air mass flow passing through an intake passage from which the separated intake passages are branched, a fuel supply controller operative to control quantity of fuel supplied to the engine in accordance with a detection output obtained from the air flow sensor, and a fuel supply revising device operative to revise the quantity of fuel supplied to the engine when the intake air relief valve is caused to be open and closed selectively.

REFERENCES:
patent: 4512152 (1985-04-01), Asaba
patent: 4982567 (1991-01-01), Mashimoto

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