Toyota Jidosha Kabushiki Kaisha

Toyota Jidosha Kogyo Kabushiki Kaisha

Chigaku Murata

Toshimitsu Ito

In the fuel control for an engine for which cut off of fuel supply is performed while the engine is in the decelerating operation condition, at the time of fuel cut off termination, an injection of fuel through a fuel injector into an intake system of the engine is supplied at substantially the same time as stopping the fuel cut off, wherein the amount of such fuel injection is controlled according to the temperature of the air being sucked into the engine intake system so as to be decreased as the air temperature increases.

Method and device for control of internal combustion engine at end of

A system for controlling or interrupting the fuel supply in an internal combustion engine operating under a braking condition, in response to the vacuum level in its intake system. This system is equipped with an air pump driven by an output shaft of the engine, and a pressure responsive valve including two chambers partitioned by a diaphragm, a valve body coupled to the diaphragm and a valve seat therefor. A discharge pressure from the air pump is applied to one of the chambers, and a vacuum from the intake system, downstream of a throttle valve in the carburetor, is applied to the other of the chambers. This pressure responsive valve readily discriminates between the engine braking condition and the idling condition of the engine, by widening the sensible or detecting range between the maximum possible vacuum level in an intake pipe, upon idling and the minimum possible vacuum level in the intake pipe, upon engine braking. When the system detects engine braking condition, the fuel supply is interrupted so as to suppress the generation of harmful constituents in the exhaust gases.

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Toyota, Japan

Chigaku Murata