Control system for an engine having an air intake passage

Details Control system for an engine having an air intake passage Control system for an engine having an air intake passage

1985-02-21

1987-12-15

Lall, Parshotam S.

Boots, shoes, and leggings

73204, 731182, 123494, 364510, F02M 5100, G01F 168

Patent

active

047137657

ABSTRACT:
A control system for an engine has a temperature sensitive element as part of a device for measuring the air flow in an air intake manifold to the engine. Further, a first pulse signal is generated, corresponding to the rotation of the engine, for controlling the setting of a flip-flop. A transistor is conducted in the set state of the flip-flop to supply a heating electric current to the element. The element supplied with the current is raised to the temperature that corresponds to the air flow in the manifold. When the temperature of the element is raised until the specified temperature difference to the air temperature (measured by a sub temperature sensitive element) is set, the temperature difference is detected by a comparator, and the flip-flop is reset by the detection signal. A pulse-shaped signal corresponding to the set state of the flip-flop is produced as a measurement output signal, supplied as one detection signal of the operating state of the engine to an engine control unit, and the current to the element is controlled to be supplied by the pulse-shaped signal.

REFERENCES:
patent: 3803913 (1974-04-01), Tracer
patent: 3928800 (1975-12-01), Strenglein
patent: 4334186 (1982-06-01), Sasayama et al.
patent: 4357830 (1982-11-01), Kohama et al.
patent: 4409828 (1983-10-01), Kohama et al.
patent: 4587842 (1986-05-01), Handtmann

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