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US 11,530,743 B2Granted
Vehicle
AssigneeHonda Motor Co., Ltd.
InventorTakuya Honjo
Life of this patent
Estimating the term…
Abstract
A vehicle includes: an electric motor; and a temperature-control circuit through which a non-conductive temperature-control medium for temperature control for the electric motor circulates. The temperature-control circuit includes: a heat exchanger configured to exchange heat between the non-conductive temperature-control medium and a conductive temperature-control medium; and a pump driven in accordance with driving of the vehicle to circulate the non-conductive temperature-control medium. The temperature-control circuit further includes a liquid pressure holding unit configured to hold liquid pressure of the non-conductive temperature-control medium in the heat exchanger equal to or higher than a predetermined pressure.
Claims7
A vehicle comprising:
- an electric motor;
- a power transmission device that is provided between the electric motor and a drive wheel and is configured to transmit power from the electric motor to the drive wheel;
- and
- a temperature-control circuit through which a non-conductive temperature-control medium for temperature control for the electric motor circulates, wherein
- the temperature-control circuit includes:
- a heat exchanger configured to exchange heat between the non-conductive temperature-control medium and a conductive temperature-control medium;
- a pump driven in accordance with driving of the vehicle to circulate the non-conductive temperature-control medium,
- a liquid pressure holding unit configured to hold liquid pressure of the non-conductive temperature-control medium in the heat exchanger equal to or higher than a predetermined pressure,
- a first flow path through which oil is supplied to the heat exchanger and the electric motor as the non-conductive temperature control medium;
- a second flow path through which the oil is supplied to the power transmission device;
- and
- a branching portion from which the temperature-control circuit branches into the first flow path and the second flow path, and
- the liquid pressure holding unit is provided between the branching portion and the heat exchanger in the first flow path.
10 more elements
A vehicle comprising:
- an electric motor;
- and
- a temperature-control circuit through which a non-conductive temperature-control medium for temperature control for the electric motor circulates, wherein
- the temperature-control circuit includes:
- a heat exchanger configured to exchange heat between the non-conductive temperature-control medium and a conductive temperature-control medium;
- a pump driven in accordance with driving of the vehicle to circulate the non-conductive temperature-control medium;
- and
- a liquid pressure holding unit configured to hold liquid pressure of the non-conductive temperature-control medium in the heat exchanger equal to or higher than a predetermined pressure, and
- the liquid pressure holding unit is configured with check valves provided on inflow and outflow sides of the heat exchanger.
6 more elements
A vehicle comprising:
- an electric motor;
- and
- a temperature-control circuit through which a non-conductive temperature-control medium for temperature control for the electric motor circulates, wherein
- the temperature-control circuit includes:
- a heat exchanger configured to exchange heat between the non-conductive temperature-control medium and a conductive temperature-control medium;
- a pump driven in accordance with driving of the vehicle to circulate the non-conductive temperature-control medium;
- and
- a liquid pressure holding unit configured to hold liquid pressure of the non-conductive temperature-control medium in the heat exchanger equal to or higher than a predetermined pressure,
- the liquid pressure holding unit is configured with electrically-actuated valves provided on inflow and outflow sides of the heat exchanger,
- the vehicle further includes a control device configured to control the electrically-actuated valves, and
- the control device controls the electrically-actuated valve to restrict outflow of the non-conductive temperature-control medium from the heat exchanger when a speed of the vehicle is equal to or less than a threshold.
8 more elements
A vehicle comprising:
- an electric motor;
- a temperature-control circuit through which a non-conductive temperature-control medium for temperature control for the electric motor circulates, wherein the temperature-control circuit includes:
- a heat exchanger configured to exchange heat between the non-conductive temperature-control medium and a conductive temperature-control medium;
- a pump driven in accordance with driving of the vehicle to circulate the non-conductive temperature-control medium, and
- a liquid pressure holding unit configured to hold liquid pressure of the non-conductive temperature-control medium in the heat exchanger equal to or higher than a predetermined pressure,
- a pressure sensor configured to measure liquid pressure of the non-conductive temperature-control medium in a flow path through which the non-conductive temperature-control medium is supplied to the heat exchanger in the temperature-control circuit;
- and
- a control device configured to detect, based on the liquid pressure of the non-conductive temperature-control medium measured by the pressure sensor, a leak of the non-conductive temperature-control medium in the liquid pressure holding unit or the heat exchanger, wherein
- the control device is configured to determine that the leak occurs when pressure difference between a driving pressure that is liquid pressure measured when the vehicle is driven and a stopping pressure that is liquid pressure measured when the vehicle is stopped is equal to or greater than a first threshold.
6 more elements
A vehicle comprising:
- an electric motor;
- a temperature-control circuit through which a non-conductive temperature-control medium for temperature control for the electric motor circulates, wherein the temperature-control circuit includes:
- a heat exchanger configured to exchange heat between the non-conductive temperature-control medium and a conductive temperature-control medium;
- a pump driven in accordance with driving of the vehicle to circulate the non-conductive temperature-control medium, and
- a liquid pressure holding unit configured to hold liquid pressure of the non-conductive temperature-control medium in the heat exchanger equal to or higher than a predetermined pressure,
- a pressure sensor configured to measure liquid pressure of the non-conductive temperature-control medium in a flow path through which the non-conductive temperature-control medium is supplied to the heat exchanger in the temperature-control circuit;
- and
- a control device configured to detect, based on the liquid pressure of the non-conductive temperature-control medium measured by the pressure sensor, a leak of the non-conductive temperature-control medium in the liquid pressure holding unit or the heat exchanger, wherein
- the control device is configured to determine that the leak occurs when pressure difference between a first pressure that is liquid pressure measured at a first timing when the vehicle is stopped and a second pressure that is liquid pressure measured at a second timing after the first timing when the vehicle is stopped is equal to or greater than a first threshold.
6 more elements
Dependencies are inferred from the claim text.