Control System for Opportunistic Heating of Transmission Fluid

    公开(公告)号:US20210277987A1

    公开(公告)日:2021-09-09

    申请号:US16809705

    申请日:2020-03-05

    Abstract: A thermal management for a hybrid vehicle is provided. The system includes an engine coolant to cabin air heat exchanger in a first heat exchange loop and being operably coupled to an engine coolant circuit and cabin air in the vehicle, respectively, a transmission fluid to engine coolant heat exchanger in a second heat exchange loop and being operably coupled to a transmission fluid circuit and the engine coolant circuit, respectively, a control valve operable to control a flow of engine coolant through at least the second heat exchange loop, and a control module configured to selectively operate the control valve to initiate or restrict the flow through the second heat exchange loop to provide heat to the transmission fluid circuit based on ambient temperature, transmission fluid temperature and engine coolant temperature. The control module is further configured to enable control functions associated with transmission operation and hybrid functions based on the transmission fluid temperature.

    Control system for opportunistic heating of transmission fluid

    公开(公告)号:US11359714B2

    公开(公告)日:2022-06-14

    申请号:US16809705

    申请日:2020-03-05

    Abstract: A thermal management for a hybrid vehicle is provided. The system includes an engine coolant to cabin air heat exchanger in a first heat exchange loop and being operably coupled to an engine coolant circuit and cabin air in the vehicle, respectively, a transmission fluid to engine coolant heat exchanger in a second heat exchange loop and being operably coupled to a transmission fluid circuit and the engine coolant circuit, respectively, a control valve operable to control a flow of engine coolant through at least the second heat exchange loop, and a control module configured to selectively operate the control valve to initiate or restrict the flow through the second heat exchange loop to provide heat to the transmission fluid circuit based on ambient temperature, transmission fluid temperature and engine coolant temperature. The control module is further configured to enable control functions associated with transmission operation and hybrid functions based on the transmission fluid temperature.

    Vehicle cabin thermal management system and control methods

    公开(公告)号:US11364769B2

    公开(公告)日:2022-06-21

    申请号:US16717298

    申请日:2019-12-17

    Abstract: A thermal management system for a passenger cabin of a hybrid vehicle includes a refrigerant loop in fluid communication with a compressor, a condenser, and a chiller. A main cabin evaporator is in fluid communication with the refrigerant loop. A first valve is configured to regulate refrigerant flow through the main cabin evaporator. A temperature sensor disposed at the main cabin evaporator is configured to output a signal indicative of a main cabin evaporator temperature. An auxiliary evaporator is in fluid communication with the refrigerant loop. A second valve is configured to regulate refrigerant flow through the auxiliary evaporator. A controller is programmed to, in response to the main cabin evaporator temperature being less than a threshold while the main cabin evaporator is operated with the second valve closed, open the second valve to cycle refrigerant through the auxiliary evaporator to increase the main cabin evaporator temperature.

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