Throttle valve control apparatus of vehicle

Details Throttle valve control apparatus of vehicle Throttle valve control apparatus of vehicle

1993-07-27

1995-03-07

Nelli, Raymond A.

Internal-combustion engines

Engine speed regulator

Idle speed control

36443105, F02M 908

Patent

active

053948475

ABSTRACT:
A throttle control system reliably determines failure of a throttle valve driving system. During engine idling, a throttle valve is opened and closed by an actuator. A central processing unit generates a pulse-like drive signal to the actuator through a back-up integrated circuit. When the frequency of the drive signal exceeds a predetermined value, the back-up integrated circuit determines that a failure in the central processing unit has occurred. Since this determination is based on the frequency of the drive signal, a driving system failure can be reliably detected even using pulse-like signals.

REFERENCES:
patent: 5031595 (1991-07-01), Heck et al.
patent: 5115396 (1992-05-01), Keegan
patent: 5191531 (1993-03-01), Kurosu et al.
patent: 5199272 (1993-04-01), Yamanaka et al.
patent: 5235951 (1993-08-01), Taguchi et al.
patent: 5307776 (1994-05-01), Unuvar et al.
patent: 5307777 (1994-05-01), Sasajima et al.

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