Title:
HYDRAULIC OIL CONTROLLER, IN HYDRAULIC TRAVELLING VARIABLE-SPEED TRANSMISSION DEVICE OF MOBILE AGRICULTURAL MACHINE
Document Type and Number:
Japanese Patent JPS6034523
Kind Code:
A
Abstract:
PURPOSE:To reduce shock at the time of variable-speed shifting, by adjusting engagement period of a clutch by adjusting a supply quantity of hydraulic oil to a hydraulic clutch type speed change gear according to the shaft speed of an engine. CONSTITUTION:At the time of engagement and disengement actions of a hydraulic pressure, predetermined flow control of hydraulic oil of an oil pump 7 is done by a flow control valve 8, one of clutch pistons P1, P2... is pushed by supplying the hydraulic oil through a variable-speed shifting valve 9 and the remaining oil in the other hydraulic clutches is discharged into a tank 10. A detected value of a rotary speed by a speed detector S detecting the rotary speed of a crankshaft 2 driving the oil pump 7 through an appropriate mechanism is applied to a control part 11, in control action by the flow control valve 8. Then the detected value is converted into a current value by the control part 11 and a flow path from the flow control valve 8 to the variable-speed shifting valve 9 is controlled.
Inventors:
DOI YOSHINORI
Application Number:
JP14274983A
Publication Date:
February 22, 1985
Filing Date:
August 04, 1983
Export Citation:
Assignee:
ISEKI AGRICULT MACH
International Classes:
F16D48/02; F16D48/06; F16H61/00; (IPC1-7): F16D25/11
Domestic Patent References:
| JPS4843300U | 1973-06-04 |
Attorney, Agent or Firm:
Takayoshi Hayashi
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