Automated mechanical transmission system for use in commercial v

Details Automated mechanical transmission system for use in commercial v Automated mechanical transmission system for use in commercial v

1987-11-12

1989-08-15

Braun, Leslie A.

192 clutches and power-stop control

Transmission control and clutch control

Common control

192 7012, 192 86, 192113B, B60K 4122, F16D 25063, F16D 1374

Patent

active

048566284

ABSTRACT:
An automated mechanical transmission system for use in commercial vehicles comprises an oil spray type oil hydraulic clutch, a mechanical transmission having a shift cylinder, a shift valve, a select cylinder, and a select valve, a hydraulic system control circuit, a clutch oil spray circuit, and a clutch/transmission select valve. The oil hydraulic clutch includes an oil hydraulic clutch servo cylinder for sandwiching a clutch disk between a pressure plate and a clutch cover, the system control circuit includes a high pressure side and a low pressure side hydraulic clutch control lines connected with the clutch servo cylinder, and a hydraulic transmission control line connected with the shift cylinder and select cylinder through the shift valve and select valve. A pressure control valve actuated by a pressure control pilot valve is disposed at the low pressure side hydraulic clutch control line. The pressure control valve adjusts oil pressure of the oil hydraulic circuit to connect or disconnect the clutch, thereby to gear shift the transmission. An oil spray control valve is disposed in the clutch oil spray circuit and controls the flow rate of oil displayed to the clutch disk spray according to each state of the clutch.

REFERENCES:
patent: 3753478 (1973-08-01), Shiber
patent: 4142619 (1979-03-01), Spokas
patent: 4299320 (1981-11-01), Delsmen et al.
patent: 4625840 (1986-12-01), Kojima et al.
patent: 4753332 (1988-06-01), Bieber et al.

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