Hydraulic clutch control of vehicle power train
AssigneeJATCO Ltd
InventorsNaoya Inoue, Tateki Jozaki, Tatsuo Ochiai
Life of this patent
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Abstract
A hydraulic clutch (12, 13) transmits driving torque in a power train of a vehicle. An oil pressure supply unit (35) which supplies oil pressure for engagement to the clutch (12, 13) and a controller (40) which controls the unit (35) are provided. The controller (40) causes the unit (35) prior to engagement of the clutch (12, 13) to precharge the interior of the clutch (12, 13) with hydraulic fluid. The controller (40) counts an elapsed time since the last release of the clutch (12, 13) and shortens the precharge period as the elapsed time decreases, thereby optimizing the precharge state of the clutch (12, 13).
Claims12
A control device for a hydraulic clutch which is provided in a power train of a vehicle to transmit a drive torque, comprising:
- an oil pressure supply unit which supplies oil pressure to engage the clutch;
- and
- a programmable controller programmed to:
- count an elapsed time following a release of the clutch;
- and
- cause the oil pressure supply unit, when the clutch is engaged from a state of release, to precharge the interior of the clutch in accordance with the counted time to fill the interior of the clutch with hydraulic fluid prior to engage the clutch.
A control device for a hydraulic clutch which is provided in a power train of a vehicle to transmit a drive torque, comprising:
- means for supplying oil pressure to engage the clutch;
- means for counting an elapsed time following a release of the clutch;
- and
- means for causing the oil pressure supplying means, when the clutch is engaged from a state of release, to precharge the interior of the clutch in accordance with the counted time to fill the interior of the clutch with hydraulic fluid prior to engage the clutch.
A control method of a hydraulic clutch which is provided in a power train of a vehicle to transmit a drive torque and is engaged by oil pressure, the method comprising:
- counting an elapsed time following a release of the clutch;
- and
- precharging the interior of the clutch in accordance with the counted time to fill the interior of the clutch with hydraulic fluid prior to engage the clutch.
Dependencies are inferred from the claim text.