Control systems for power trains provided in vehicles
US5018408A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Sep 20, 1988 |
| Grant date | May 28, 1991 |
| Priority date | — |
| Expiry date | Sep 20, 2008 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16H2059/385
- WIPO fieldMechanical elements
- WIPO sectorMechanical engineering
Abstract
A control system for a power train provided in a vehicle to include an engine which has an engine output adjusting device, such as a throttle valve, controlled through an electric actuator in accordance with a controlled variable on an accelerator and an automatic transmission in which a speed change operation is automatically performed utilizing operating oil pressure produced in an oil hydraulic control circuit for actuating a speed change mechanism in the automatic transmission having engaging friction elements and controlled to vary in accordance with an operating condition of the engine, which comprises a first detecting device for detecting the controlled variable on the accelerator, a second detecting device for detecting a controlled variable on the engine output adjusting device, a third detecting device for detecting a travelling speed of the vehicle, a device for controlling the speed change mechanism to cause the same to carry out the speed change operation based on detection outputs of the first and third detecting devices, and a device for controlling the operating oil pressure applied to the engaging friction elements in the speed change mechanism based on a detectio…
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.