Control device for maintaining constant speed of an automobile
US4893243A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Jan 27, 1988 |
| Grant date | Jan 9, 1990 |
| Priority date | — |
| Expiry date | Jan 27, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2050/0022
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A control device for maintaining a constant speed of an automobile, having an internal combustion engine with a throttle valve and an actuator for the throttle valve. A degree of opening of the throttle valve is decided to bring the speed of the automobile to a desired set speed, corrected in accordance with running conditions by cyclically repeating an integral calculation at a first pattern to provide an integral correction value when a difference exists between the detected speed and the set speed. This integral correcting value is quickly returned at a second pattern greater than the first pattern when the integral correction value becomes greater than a predetermined value and the relationship between the detected speed and the set speed is reversed.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.