Vehicle speed control system
US4934476A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Sep 29, 1988 |
| Grant date | Jun 19, 1990 |
| Priority date | — |
| Expiry date | Sep 29, 2008 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60W2540/12
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A vehicle speed control system compares current vehicle speed against a target vehicle speed and automatically controls the position of the throttle valve of an engine in accordance with the difference therebetween for reducing the difference. A plurality of brake switches are provided. The system terminates the control of the position when at least one of the switches detects a depression of the brake pedal. If at least one of the switches does not detect the depression of the brake pedal when at least one of the switches detects it, an abnormality signal is generated for blocking commencement of the control of the position of the throttle valve. The abnormality signal is extinguished to enable the commencement of the control when all of the switches detect the depression of the brake pedal.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.