Title:
AUTOMATIC ELECTRONIC CONTROL MECHANISM
Document Type and Number:
Japanese Patent JPS56155405
Kind Code:
A
Abstract:
An electronic system for controlling the drive ratio changes in an automatic transmission of a motor vehicle having solenoid valves for actuating the gear changes. A microcomputer selectively governs the solenoid valves through power amplifiers, in such a way that when the solenoid valves are not energized the highest drive ratio is engaged. The ratio of the power amplifiers to the corresponding output signals of the microcomputer is such that the solenoid valves are not energized when the supply voltage is zero or when the microcomputer voltage drops below the threshold value necessary for its proper operation.
Inventors:
JIERAARU PANIE
JIYAN KUROODO RUMII
JIYAN KUROODO RUMII
Application Number:
JP4947981A
Publication Date:
December 01, 1981
Filing Date:
April 03, 1981
Export Citation:
Assignee:
RENAULT
International Classes:
B60K23/00; F16H61/12; G05B23/02; G05B9/02; F16H59/24; F16H59/44; (IPC1-7): B60K20/00; B60K23/00; G05B9/02; G05B23/02
Domestic Patent References:
| JPS5479376A | 1979-06-25 | |||
| JPS5169966A | 1976-06-17 | |||
| JP44005910A |