Apparatus for detecting malfunction of interface circuit in comm

Details Apparatus for detecting malfunction of interface circuit in comm Apparatus for detecting malfunction of interface circuit in comm

1990-04-13

1991-05-28

Yusko, Donald J.

Communications: electrical

Continuously variable indicating

With meter reading

340653, 324509, 3644241, H04Q 900, G05B 2302

Patent

active

050198106

ABSTRACT:
In a system for controlling a vehicle by exchanging signals between an electronic controller for controlling a vehicle transmission and another electronic controller for controlling a vehicle engine, the transmission controller incorporates a monitor circuit which receives, via an interface circuit of the engine controller, a signal output from the transmission controller through a communication circuit, and which is capable of detecting abnormalities of the interface circuit of the engine controller. If an abnormality of the interface circuit of the engine controller takes place such that the engine torque cannot be reduced although the transmission controller issues an instruction to reduce the engine torque, the transmission controller maintains the line pressure instead of reducing the same to cope with such a situation, thus effecting fail-safe control.

REFERENCES:
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patent: 4635508 (1987-01-01), Tatsumi
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patent: 4764729 (1988-08-01), Yakuwa et al.
patent: 4782300 (1988-11-01), Bonaccio et al.
patent: 4843557 (1989-06-01), Ina et al.
"Microprocessor controls engine and transmission", 8/83, Automotive Engineering, pp. 42-45.

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