Accelerator control system for a motor vehicle

Internal-combustion engines – Engine speed regulator – Open loop condition responsive

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Details

123339, F02D 1110, F02D 4122

Patent

active

051098199

ABSTRACT:
An accelerator control system having an analog pedal position sensor and an idle switch capable of generating complementary output signals indicative of pedal position. The system includes a control circuit which commands the engine to an idle speed if the analog sensor indicates an idle state or if the complementary output signals together indicate an idle state. The system overrides the idle switch in the absence of complementary output signals therefrom and allows operation in response to the pedal position sensor as long as its output signal is within a predetermined range. Provision is made for operation at a reduced performance level in the event of an out-of-range failure of the analog sensor if the complementary output signals together indicate a non-idle condition.

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Weimer, Cummins Engine Company letter dated Dec. 11, 1987.
SAE J1843, "Accelerator Pedal Position Sensor for Use With Electronic Controls in Medium- and Heavy-Duty Vehicle Applications," Prepared by S.A.E. Truck and Bus Diesel Engine Electronic Controls Subcommittee (Proposed Nov. 1990).
Lannan et al., "Cummins Electronic Controls for Heavy Duty Diesel Engines," IEEE 88 CH2533-8, International Congress on Transportation Electronics, Convergence 88, Dearborn, Mich., Oct. 17-18, 1988.
National Highway Traffic Safety Administration, DOT Standard No. 124, Jan. 1973.

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