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US 9,242,637 B2Granted
Vehicle control system
AssigneesToyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki Kaisha, Aisin Aw Co., Ltd.
InventorsTomohiko Miyamoto, Noriyuki Yagi, Shigeru Matsumura, Kenjiro Nagata, Masatoshi Sugimoto
Life of this patent
Estimating the term…
Abstract
A vehicle control system includes: a power unit including an electric rotary machine; an electric coolant pump configured to circulate a coolant that cools the electric rotary machine; and a control unit configured to operate the electric coolant pump based on a condition that a temperature of the electric rotary machine is equal to or higher than a predetermined operation threshold temperature, and a condition that an output of the electric rotary machine is equal to or higher than a predetermined operation threshold output.
Claims9
A vehicle control system comprising:
- a power unit including an electric rotary machine;
- an electric coolant pump configured to circulate a coolant that cools the electric rotary machine, where a power supply of a driver circuit of the electric coolant pump is a low voltage power supply independent from the power supply unit of the electric rotary machine;
- and
- a control unit configured to operate the electric coolant pump based on a condition that a temperature of the electric rotary machine is equal to or higher than a predetermined operation threshold temperature,
- wherein the control unit is configured to operate the electric coolant pump additionally based on a condition that an output of the electric rotary machine is equal to or higher than a predetermined operation threshold output, wherein the output of the electric rotary machine relates to the output performance of the vehicle,
- wherein the control unit is configured to operate the electric coolant pump when the temperature of the electric rotary machine is equal to or higher than the predetermined operation threshold temperature and the output of the e electric rotary machine is equal to or higher than the predetermined operation threshold output, in a case where a vehicle drive mode is a first mode, and
- wherein the control unit is configured to operate the electric coolant pump when the temperature of the electric rotary machine is equal to or higher than the predetermined operation threshold temperature or the output of the electric rotary machine is equal to or higher than the predetermined operation threshold output, in a case where the vehicle drive mode is a second mode.
4 more elements
A vehicle control system comprising:
- a power unit including an electric rotary machine;
- an electric coolant pump configured to circulate a coolant that cools the electric rotary machine, where a power supply of a driver circuit of the electric coolant pump is a low voltage power supply independent from the power supply unit of the electric rotary machine;
- and
- a control unit configured to operate the electric coolant pump based on a condition that a temperature of the electric rotary machine is equal to or higher than a predetermined operation threshold temperature,
- wherein:
- the control unit is configured to operate the electric coolant pump additionally based on a condition that an output of the electric rotary machine is equal to or higher than a predetermined operation threshold output, wherein the output of the electric rotary machine relates to the output performance of the vehicle;
- the control unit is configured to set a hysteresis characteristic for determination as to whether to operate the electric coolant pump;
- the control unit is configured to set the operation threshold temperature, at which the electric coolant pump starts operating, to a temperature higher than a stop threshold temperature, at which the electric coolant pump stops operating;
- and
- the control unit is configured to set the operation threshold temperature and the stop threshold temperature such that a difference between the operation threshold temperature and the stop threshold temperature takes at least two different values, one of which is a first temperature difference corresponding to a first output value, which is a value of the output of the electric rotary machine, the other of which is a second temperature difference corresponding to a second output value, which is a value of the output of the electric rotary machine and is larger than the first output value, and the second temperature difference is greater than the first temperature difference.
7 more elements
A vehicle control system comprising:
- a power unit including an electric rotary machine;
- an electric coolant pump configured to circulate a coolant that cools the electric rotary machine, where a power supply of a driver circuit of the electric coolant pump is a low voltage power supply independent from the power supply unit of the electric rotary machine;
- and
- a control unit configured to operate the electric coolant pump based on a condition that a temperature of the electric rotary machine is equal to or higher than a predetermined operation threshold temperature,
- wherein the control unit is configured to operate the electric coolant pump additionally based on a condition that an output of the electric rotary machine is equal to or higher than a predetermined operation threshold output, wherein the output of the electric rotary machine relates to the output performance of the vehicle;
- and
- wherein
- the control unit is configured to set the operation threshold output, at which the electric coolant pump starts operating, such that the operation threshold output is higher than a stop threshold output, at which the electric coolant pump stops operating.
5 more elements
Dependencies are inferred from the claim text.