F - Mech Eng,Light,Heat,Weapons – 16 – D
Patent
F - Mech Eng,Light,Heat,Weapons
16
D
192/12, 74/168,
F16D 48/06 (2006.01)
Patent
CA 1075041
ABSTRACT OF THE DISCLOSURE A vehicle transmission with an automatic clutch is disclosed in which for gear shifting the clutch is disengaged with the assistance of a vacuum of a source of vacuum, via a control valve having a solenoid actuated clutch release valve and a clutch serve. disengagement of the clutch is carried out when a gear shift lever is manipulated with an engine accler- ater released. The reengagement of the clutch commences as seem as the flow of current to the solenoid for the clutch release valve is cut. The clutch release valve then disconnects the clutch serve form the source of vacuum. The reduction of the vacuum in the clutch serve takes place in two stages. In the first stage, the vacuum is reduced very quickly by means of a selenoid actuated air-on (air bleed) valve for a predetermined time after the flow of current to the selenoid for the clutch release valve has been cut until the clutch begins to engage or is about to engage. Current is supplied to the solenoid for the air-on valve when current is supplied to the solenoid for the clutch release valve. A delay means is pro- vided whereby, after the predetermined time after the flow of current to the selenoid for the clutch release valve has been cut, the flow or current to the solenoid for the air-on valve is cut. -1-
278816
Kawamoto Tamio
Takehiro Etsusou
Toyota Hiroshi
Na
Nissan Motor Co. Ltd.
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