Control system for hydraulic automatic clutch
AssigneeNissan Motor Co., Ltd.
InventorsHaruyoshi Kumura, Yoshikazu Tanaka, Keiju Abo, Hiroyuki Hirano, Sigeaki Yamamuro
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Abstract
The control system comprises a starting valve wherein an engine revolution speed indicative fluid pressure and a start adjustment fluid pressure act on a spool of the valve against each other. The starting valve generates a start pressure to be used as a clutch engagement pressure for a hydraulic clutch. The start adjustment fluid pressure is generated by a start adjustment valve coupled with an electronic control unit. Under the control of the electronic control unit, the start adjustment offsets a variation in the engine revolution fluid pressure when the engine idles with the vehicle at a standstill.
Claims13
A control system for a hydraulic automatic clutch of a vehicle having an engine, comprising:
- a hydraulic clutch;
- an engine revolution means for generating an engine revolution fluid pressure signal indicative of a revolution speed of the engine;
- a start adjustment valve means for generating a start adjustment fluid pressure signal in response to an electric signal;
- a starting valve means coupled with said engine revolution means and said start adjustment valve means for generating a start fluid pressure in response to said engine revolution fluid pressure signal and said start adjustment fluid pressure signal, said start fluid pressure being supplied to said clutch to engage same;
- and
- an electronic control unit means for controlling said electric signal to keep said clutch in a predetermined state regardless of a variation in said engine revolution fluid pressure signal when the engine idles with the vehicle at a standstill.
Dependencies are inferred from the claim text.