Temperature control apparatus of vehicle

Patent metadata

Field	Value
Publication number	US-10808599-B2
Application number	US-201916239583-A
Country	US
Kind code	B2
Filing date	Jan 4, 2019
Priority date	Mar 12, 2018
Publication date	Oct 20, 2020
Grant date	Oct 20, 2020

Abstract

A temperature control apparatus of a vehicle of the invention flows a cooling medium in an engine circulation circuit and a battery circulation circuit and an activation of an engine heat exchanging system so as not to perform an engine heat exchanging when an engine temperature is lower than an engine warming end temperature and a battery temperature is lower than a predetermined battery temperature lower than a battery warming end temperature, and flows the cooling medium in the engine circulation circuit and the battery circulation circuit and the activation of the engine heat exchanging system so as to perform the engine heat exchanging when the engine temperature is lower than the engine warming end temperature, and the battery temperature is equal to or higher than the predetermined battery temperature.

First claim

What is claimed is:

1. A temperature control apparatus of a vehicle, the temperature control apparatus comprising:
an engine circulation circuit including an engine passage in an internal combustion engine of the vehicle, a first cooling passage in a first cooling system, and a cooling medium flowing in the engine circulation circuit;
a battery circulation circuit including a battery passage in a battery of the vehicle, a second cooling passage in a second cooling system, and a cooling medium flowing in the battery circulation circuit;
an engine heat exchanging system to perform an engine heat exchanging to exchange heat between the cooling medium flowing in the engine circulation circuit and the cooling medium flowing in the battery circulation circuit; and
an electronic control unit configured to;
control an activation of the engine heat exchanging system;
control a flow of the cooling medium flowing in the engine circulation circuit to control a temperature of the internal combustion engine to a temperature within a predetermined engine temperature range by heat exchange between the cooling medium and the internal combustion engine;
control a flow of the cooling medium flowing in the battery circulation circuit to control a temperature of the battery to a temperature within a predetermined battery temperature range by heat exchange between the cooling medium and the battery;
control the flow of the cooling medium in the engine circulation circuit, the flow of the cooling medium in the battery circulation circuit and the activation of the engine heat exchanging system so as to perform the engine heat exchanging when the temperature of the internal combustion engine is equal to or higher than an engine warming end temperature, and the temperature of the battery is lower than a battery warming end temperature, the engine warming end temperature being a lower limit temperature of the predetermined engine temperature range and the battery warming end temperature being a lower limit temperature of the predetermined battery temperature range;
control the flow of the cooling medium in the engine circulation circuit, the flow of the cooling medium in the battery circulation circuit, and the activation of the engine heat exchanging system so as not to perform the engine heat exchanging when the temperature of the internal combustion engine is lower than the engine warming end temperature, and the temperature of the battery is lower than a predetermined battery temperature lower than the battery warming end temperature; and
control the flow of the the cooling medium in the engine circulation circuit, the flow of the cooling medium in the battery circulation circuit, and the activation of the engine heat exchanging system so as to perform the engine heat exchanging when the temperature of the internal combustion engine is lower than the engine warming end temperature, and the temperature of the battery is equal to or higher than the predetermined battery temperature.

2. The temperature control apparatus as set forth in claim 1 , wherein the engine heat exchanging system includes:
a first engine connection passage to connect the engine circulation circuit and the battery circulation circuit to each other so as to supply the cooling medium from the engine circulation circuit to the battery circulation circuit;
a second engine connection passage to connect the engine circulation circuit and the battery circulation circuit to each other so as to discharge the cooling medium from the battery circulation circuit to the engine circulation circuit; and
an engine connection control valve to control a connection between the engine circulation circuit and the battery circulation circuit; and
the electronic control unit is configured to:
control the activation of the engine heat exchanging system so as not to perform the engine heat exchanging by controlling an activation of the engine connection control valve so as to shut off any of a communication between the engine circulation circuit and the battery circulation circuit via the first engine connection passage and a communication between the engine circulation circuit and the battery circulation circuit via the second engine connection passage; and
control the activation of the engine heat exchanging system so as to perform the engine heat exchanging by controlling the activation of the engine connection control valve so as to communicate the engine circulation circuit and the battery circulation circuit with each other via the first engine connection passage and the second engine connection passage.

3. The temperature control apparatus as set forth in claim 1 , wherein the electronic control unit is configured to control a flow rate of the cooling medium flowing in the engine circulation circuit to a minimum flow rate when the temperature of the internal combustion engine is lower than the engine warming end temperature, and the temperature of the battery is lower than the predetermined battery temperature.

4. The temperature control apparatus as set forth in claim 1 , wherein the first cooling system includes a radiator provided in the engine circulation circuit.

5. The temperature control apparatus as set forth in claim 1 , wherein the second cooling system includes a heat pump including an evaporator in the battery circulation circuit, a condenser, a compressor, and an expansion valve.

6. The temperature control apparatus as set forth in claim 1 , wherein the vehicle comprises a device including an electric motor,
the temperature control apparatus further comprises:
a device circulation circuit including a passage in the device, a passage in a third cooling system, and a cooling medium flowing in the device circulation circuit to control a temperature of the device by heat exchange to a temperature within a predetermined device temperature range; and
a device heat exchanging system to perform a device heat exchanging to exchange heat between the cooling medium flowing in the device circulation circuit and the cooling medium flowing in the battery circulation circuit, and

the electronic control unit is configured to:
control the flow of the cooling medium in the engine circulation circuit, the flow of the cooling medium in the device circulation circuit, the flow of the cooling medium in the battery circulation circuit, and the activation of the engine heat exchanging system so as not to perform the engine heat exchanging, and control activation of the device heat exchanging system so as to perform the device heat exchanging when the temperature of the internal combustion engine is lower than the engine warming end temperature, and the temperature is lower than the predetermined temperature; and
control the flow of the cooling medium in the engine circulation circuit, the flow of the cooling medium in the battery circulation circuit, and control the activation of the engine heat exchanging system so as to perform the engine heat exchanging when the temperature of the battery reaches the predetermined battery temperature while the temperature of the internal combustion engine is lower than the engine warming end temperature.

7. The temperature control apparatus as set forth in claim 6 , wherein the device heat exchanging system includes:
a first device connection passage to connect the device circulation circuit and the battery circulation circuit to each other so as to supply the cooling medium from the device circulation circuit to the battery circulation circuit;
a second device connection passage to connect the device circulation circuit and the battery circulation circuit to each other so as to discharge the cooling medium from the battery circulation circuit to the device circulation circuit; and
a device connection

Assignees

• Toyota Motor Co Ltd

Inventors

• Ogura Yoichi
• Hayashi Kunihiko
• Miyoshi Yuji
• Yano Masatoshi
• Ofune Yu

Classifications

• F01P2007/146

  using valves · CPC title

• H01M10/663

  the system being an air-conditioner or an engine · CPC title

• B60K11/02 Primary

  with liquid cooling · CPC title

• B60K2001/005

  the electric storage means · CPC title

• B60Y2400/61

  Arrangements of controllers for electric machines, e.g. inverters · CPC title