Method and apparatus for controlling an automotive drive system with free-wheeling
US4621545A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Mar 8, 1985 |
| Grant date | Nov 11, 1986 |
| Priority date | — |
| Expiry date | Mar 8, 2005 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02T10/60
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
To prevent jolts or shocks interfering with smooth operation of an automotive vehicle upon disengagement of an automatic free-wheeling arrangement and reestablishment of engine braking, a control element (22, 23) is provided, controlled by the system, typically coupled to the brake light switch, which reestablishes positive drive connection between engine and wheels to permit engine braking, to reduce the torque supplied by the engine at the re-engagement instant, to thereby insure smooth transition from free-wheeling to engine braking. Preferably, the engine speed is sensed, and the speed of the shaft beyond the free-wheeling arrangement is sensed (points A, B), and engine torque is reduced just before synchronism is achieved.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.