US 12,145,424 B2
Vehicle temperature control system
Takuya Honjo, Tokyo (JP); and Masashi Bando, Tokyo (JP)
Assigned to HONDA MOTOR CO., LTD., Tokyo (JP)
Filed by HONDA MOTOR CO., LTD., Tokyo (JP)
Filed on Aug. 30, 2022, as Appl. No. 17/898,977.
Claims priority of application No. 2021-153640 (JP), filed on Sep. 21, 2021.
Prior Publication US 2023/0092968 A1, Mar. 23, 2023
Int. Cl. B60H 1/00 (2006.01); B60H 1/32 (2006.01)
CPC B60H 1/00885 (2013.01) [B60H 1/3205 (2013.01)] 3 Claims
OG exemplary drawing
 
1. A vehicle temperature control system, comprising:
a first temperature control circuit that is provided with a first pump and that is configured to perform temperature control of a rotary electric machine and a gearbox provided in a vehicle;
a second temperature control circuit that is provided with a second pump and that is configured to perform temperature control of an electric-power conversion unit provided in the vehicle;
a heat exchanger in which heat exchange between a first temperature control medium circulating through the first temperature control circuit and a second temperature control medium circulating through the second temperature control circuit is performed; and
a control device,
wherein the first temperature control circuit includes a first temperature sensor configured to detect a temperature of the first temperature control medium,
wherein the second temperature control circuit includes
a radiator with which heat exchange between the second temperature control medium and outside air is performed,
a first branch flow path of the second temperature control medium that bypasses the heat exchanger,
a second branch flow path of the second temperature control medium that passes through the heat exchanger, and
a flow rate control valve with which a flow rate of the second temperature control medium to the second branch flow path is controlled,
wherein the electric-power conversion unit includes an inverter configured to supply electric power to the rotary electric machine, and is capable of changing a carrier frequency of the inverter under control of the control device, and
wherein the control device is capable of controlling the carrier frequency and the flow rate control valve based on the temperature of the first temperature control medium detected by the first temperature sensor, and
wherein in a case where the temperature of the first temperature control medium is lower than a predetermined value, the control device is configured to set the carrier frequency to be lower and controls the flow rate control valve such that the flow rate to the second branch flow path is smaller, as compared with a case where the temperature of the first temperature control medium is equal to or higher than the predetermined value.