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Title:
CONTROL SYSTEM FOR FLUID-OPERATED RETARDER AND OPERATING METHOD FOR FLUID-OPERATED RETARDER
Document Type and Number:
Japanese Patent JP2000006777
Kind Code:
A
Abstract:

To smoothly operate a transmission by operating a proportional solenoid control valve with an electronic controller, operationally connecting the control valve to a proportional retarder spool valve, and operationally connecting the proportional retarder spool valve to a fluid-operated retarder.

An electronic control module 40 serving as an electronic controller receives the input signal from a retarder control level switch 46 and controls the operation of a proportional solenoid control valve 77. The proportional solenoid control valve 77 maintains a fluid sufficient to keep the control level of a retarder proportional to a solenoid current between it and a proportional retarder spool valve 70. The deceleration level by the proportional command signal of the electronic control module 40 fed to the proportional solenoid control valve 77 is controlled by a fluid-operated retarder 15 to adjust the quantity of the fluid flowing into the proportional retarder spool valve 70.


Inventors:
Gregory, Menke A.
Daniel, Simon P.
Kenneth, Kiesener P.
Application Number:
JP1999000149814
Publication Date:
January 11, 2000
Filing Date:
May 28, 1999
Export Citation:
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Assignee:
CATERPILLAR INC
International Classes:
B60T10/04; B60T1/093; B60T10/02; (IPC1-7): B60T1/093; B60T10/04
Attorney, Agent or Firm:
松本 昂