Automatic clutch control device
US4651855A · kind A · utility
Assignee
Inventor
Key dates
| Filing date | Oct 2, 1984 |
| Grant date | Mar 24, 1987 |
| Priority date | — |
| Expiry date | Oct 2, 2004 |
Classification
- Technology area (CPC F)Mechanical Engineering; Lighting; Heating
- CPC primaryF16D2500/7109
- WIPO fieldTransport
- WIPO sectorMechanical engineering
Abstract
The control device comprises an electric motor-gearbox unit (2) acting on the thrust bearing (16) of a clutch (1) and a switching device (3) comprising four transistors adapted to apply the voltage from the battery (30) with either polarity to the motor (20) of the motor-gearbox unit (2) according to whether the output of "AND" gates (41 and 42) is at 1. This occurs, when end of travel switches (28 and 29) are closed, when positive pulses appear at the output (40c) of the microprocessor (40) and according to whether the output (40d) is at "0" or "1". The microprocessor produces pulses of defined duration at its output (40c) with a recurrence frequency which is a direct function of the frequency produced by the sensor (50) responsive to the rotation speed of the motor when above a threshold higher than the idling speed, in the clutch engagement phase, and which is such in the clutch release phase that the pulses are adjacent. The clutch engagement and release phases are defined by the state of the input (40b) of the microprocessor, a logic system (51) coupled to control devices of the vehicle being adapted to produce a clutch release order.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.