Throttle valve opening degree processing system

Details Throttle valve opening degree processing system Throttle valve opening degree processing system

1990-08-31

1992-08-18

Raevis, Robert

Measuring and testing

Simulating operating condition

Marine

G01M 1500

Patent

active

051388731

ABSTRACT:
The analog output of a throttle valve position sensor is A/D converted in an engine control unit and the digital signal is subject to a correction which corrects the position indicated by the signal to one which accurately reflects the position of the throttle valve. The corrected valve is then converted into a PWM signal and transmitted to a transmission control unit. The PWM signal is de-coded and used for transmission control purposes. If the position sensor malfunctions, the characteristics of the PWM signal under such circumstances reflects the improper operation thus enabling the transmission control circuit to issue a signal indicative of the situation. Only one line is required to transmit the data between the engine and transmission control units.

REFERENCES:
patent: 3784839 (1974-01-01), Weber
patent: 4665385 (1987-05-01), Henderson
patent: 4893501 (1990-01-01), Sogawa
patent: 4893502 (1990-01-01), Kubota et al.
patent: 4901561 (1990-02-01), Glowczewski
patent: 4930079 (1990-05-01), Kondo
patent: 4951206 (1990-08-01), Kyohzuka
patent: 4972332 (1990-11-01), Luebbering et al.
patent: 4989451 (1991-02-01), Ogawa et al.

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