Clutch hydraulic controller

Details Clutch hydraulic controller Clutch hydraulic controller

1999-08-17

2000-12-05

Bonck, Rodney H.

192 clutches and power-stop control

Clutches

Operators

192103F, F16H 6100

Patent

active

061553964

ABSTRACT:
Line pressure is adjusted by one valve for supplying the pressure to control the engagement of a clutch in normal and abnormal operating conditions. In the normal operating condition, the valve control pressure which is controlled by a starting clutch control valve 41 is used for the control of a clutch pressure control valve 42, so the line pressure from a line 61b is adjusted to control the engagement of the starting clutch 5. If there is a breakdown, two electrically controlled valves 41 and 45 are turned off, and the line pressure is applied through another line 64. As a result, the spool of a shift restriction valve 43 is shifted to the left, so the hydraulic oil is supplied to a pitot flange 51. In this condition, the pressure (correspondent pressure) which corresponds to the rotational speed of the engine is supplied as a signal pressure from a pitot pipe 53 through lines 66 and 67 to the shift restriction valve 43. This hydraulic controller adjusts the line pressure in the line 61b by using this correspondent pressure for controlling the engagement of the starting clutch 5.

REFERENCES:
patent: 4995283 (1991-02-01), Sawasaki et al.
patent: 5183439 (1993-02-01), Yumoto et al.
patent: 5665023 (1997-09-01), Aoki et al.

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