Control system for internal combustion engines, provided with an

Details Control system for internal combustion engines, provided with an Control system for internal combustion engines, provided with an

1981-08-31

1983-03-08

Burns, Wendell E.

Internal-combustion engines

Charge forming device

Crankcase vapor used with combustible mixture

123569, F02M 2506

Patent

active

043758002

ABSTRACT:
A control system for internal combustion engines, which comprises: a power transistor connected to the solenoid of a solenoid valve forming an EGR control valve for energization of the same; an abnormality detecting circuit arranged for comparing the input and output levels of the power transistor to generate an output signal when the two levels are out of an inverted relationship; a timer arranged for generating an output signal when the output signal of the abnormality detecting circuit is continuously generated over a predetermined period of time; and emergency means actuatable by the output signal of the timer. The emergency means may include an alarm device and a safety circuit, both responsive to the output of the timer to give the alarm and render the power transistor inoperative, respectively.

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