Constant speed running apparatus
US4754831A · kind A · utility
Assignee
Inventors
Key dates
| Filing date | Dec 4, 1986 |
| Grant date | Jul 5, 1988 |
| Priority date | — |
| Expiry date | Dec 4, 2006 |
Classification
- Technology area (CPC B)Performing Operations; Transporting
- CPC primaryB60K31/107
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
A constant speed running apparatus has a surge tank for storing a vacuum for driving a vacuum actuator, a vacuum switch for judging the amount of vacuum stored in the surge tank, and a vacuum pump activated when the amount of vacuum stored in the tank decreases so as to supply the vacuum to the tank. When a switch for starting a constant speed running is actuated, the pump is activated for a predetermined period of time to replenish the vacuum before the vacuum switch is activated. Accordingly, it is possible to maintain the internal pressure in the surge tank at a sufficiently high level when a constant-speed running control is started, and consequently improve the response of the actuator.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.