Vehicle drive device
First Claim
1. A vehicle drive device comprising:
- an oil pump configured to supply oil to an electric motor and a differential gear through an oil passage;
an oil cooler that is arranged on the oil passage and configured to cool the oil;
a bypass oil passage configured to bypass the oil cooler;
a control valve configured to be switched between a first state of regulating the oil from flowing through the oil cooler and a second state of letting the oil flow to the oil cooler; and
a control unit, whereinthe control unit keeps the control valve in the first state while a temperature of the oil circulated by the oil pump is lower than a predetermined value, and switches the control valve to the second state when the temperature of the oil circulated by the oil pump becomes not lower than the predetermined value while the control valve is in the first state, andthe control unit changes a voltage command value of the electric motor to a value smaller than a voltage command value corresponding to a required output of the electric motor after elapse of a predetermined period from a time the control valve is switched to the second state.
1 Assignment
0 Petitions
Accused Products
Abstract
A vehicle drive device includes: an oil pump; an oil cooler; a bypass oil passage configured to bypass the oil cooler; a control valve; and a control unit. The control unit keeps the control valve in a first state while a temperature of oil circulated by the oil pump is lower than a predetermined value, and switches the control valve to a second state when the temperature of the oil circulated by the oil pump becomes not lower than the predetermined value while the control valve is in the first state. The control unit changes a voltage command value of an electric motor to a value smaller than a voltage command value corresponding to a required output of the electric motor after elapse of a predetermined period from a time the control valve is switched to the second state.
6 Citations
10 Claims
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1. A vehicle drive device comprising:
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an oil pump configured to supply oil to an electric motor and a differential gear through an oil passage; an oil cooler that is arranged on the oil passage and configured to cool the oil; a bypass oil passage configured to bypass the oil cooler; a control valve configured to be switched between a first state of regulating the oil from flowing through the oil cooler and a second state of letting the oil flow to the oil cooler; and a control unit, wherein the control unit keeps the control valve in the first state while a temperature of the oil circulated by the oil pump is lower than a predetermined value, and switches the control valve to the second state when the temperature of the oil circulated by the oil pump becomes not lower than the predetermined value while the control valve is in the first state, and the control unit changes a voltage command value of the electric motor to a value smaller than a voltage command value corresponding to a required output of the electric motor after elapse of a predetermined period from a time the control valve is switched to the second state. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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Specification