VEHICLE HEAT MANAGEMENT SYSTEM

• US 20170253104A1
• Filed: 08/07/2015
• Published: 09/07/2017
• Est. Priority Date: 09/04/2014
• Status: Abandoned Application

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: AMANO, Takashi, AIKAWA, Hidefumi, HAYAKAWA, Kojiro
• Application Number:
  US15/504,785
• Publication Number:
  US 20170253104A1
• Time in Patent Office: Days
• CPC Class Codes: B60H 1/00314 Arrangements permitting a rapid heating of the heating liquid B60H1/00492, B60H1/03 take precedence; aiding engine start by heating of engine coolants F02N19/10
• CPC Class Codes: B60H 1/00321 Heat exchangers for air-conditioning devices B60H1/3227 takes precedence
• CPC Class Codes: B60H 1/00328 of the liquid-air type
• CPC Class Codes: B60H 1/00421 Driving arrangements for parts of a vehicle air-conditioning B60H1/3222 takes precedence; auxiliary drives per se for vehicles B60K25/00
• CPC Class Codes: B60H 1/00428 electric
• CPC Class Codes: B60H 1/00814 Control systems or circuits characterised by their output, for controlling particular components of the heating, cooling or ventilating installation
• CPC Class Codes: B60H 1/00885 Controlling the flow of heating or cooling liquid, e.g. valves or pumps B60H1/00899 takes precedence; constructions of valves B60H1/00485
• CPC Class Codes: B60H 1/00899 Controlling the flow of liquid in a heat pump system controlling the properties of the refrigerant liquid, e.g. pressure or temperature, B60H1/3204
• CPC Class Codes: B60H 1/025 from both the cooling liquid and the exhaust gases of the propulsion plant
• CPC Class Codes: B60H 2001/00114 Heating or cooling details
• CPC Class Codes: B60L 2240/10 Vehicle control parameters
• CPC Class Codes: B60L 2240/36 Temperature of vehicle components or parts
• CPC Class Codes: B60L 2240/445 Temperature
• CPC Class Codes: B60L 2250/26 by pedal actuation
• CPC Class Codes: F01P 3/18 Arrangements or mounting of liquid-to-air heat-exchangers such arrangements on cylinders or cylinder heads F01P3/04; relative to vehicles B60K11/04
• CPC Class Codes: F01P 3/20 Cooling circuits not specific to a single part of engine or machine F01P3/22 takes precedence
• CPC Class Codes: F01P 5/12 Pump-driving arrangements
• CPC Class Codes: F01P 7/16 by thermostatic control

Abstract

A heat management system for vehicles comprises: a first circulation circuit which cools an engine body of an internal combustion engine and includes a first pump for pressure-feeding a refrigerant; a second circulation circuit including an exhaust heat recovery apparatus for recovering exhaust heat from the internal combustion engine, a heater core used for air-conditioning of a vehicle, and a second pump for pressure-feeding the refrigerant; communication passages allowing the first circulation circuit to communicate with the second circulation circuit; and an on-off valve provided in the first communication passage, and switching between the communication between the first circulation circuit and the second circulation circuit and the preventing of communication therebetween, wherein the on-off valve is controlled such that the refrigerant temperature of the first circulation circuit is higher than that of the second circulation circuit.

Claims

1. A vehicle heat management system applied to a vehicle to which an internal combustion engine is mounted, comprising:

a first circulation circuit that cools an engine body of the internal combustion engine, and in which is provided a first pump that pressure feeds coolant;

a second circulation circuit in which are provided an exhaust heat recovery apparatus that recovers exhaust heat of the internal combustion engine, a heater core that is used for air conditioning of the vehicle, and a second pump that pressure feeds coolant;

a communicating section that communicates together the first circulation circuit and the second circulation circuit so as to be able to mix together the coolant in the first circulation circuit and the coolant in the second circulation circuit;

a control valve provided in the communicating section, that can be changed over between communicating together the first circulation circuit and the second circulation circuit, and preventing such communication; and

a coolant temperature control device configured to control the control valve, so as to implement a state in which the temperature of the coolant flowing in the first circulation circuit is higher than the temperature of the coolant flowing in the second circulation circuit.

2. A vehicle heat management system according to claim 1, wherein an EGR cooler is further provided in the second circulation circuit.

3. A vehicle heat management system according to claim 1, wherein the coolant temperature control means controls the control valve so as, if the load demanded from the internal combustion engine arrives at a load region in which knocking may easily occur, or if there is a possibility that the load may arrive at the load region, to communicate together the first circulation circuit and the second circulation circuit.

4. A vehicle heat management system according to claim 1, wherein, during dead soak, the coolant temperature control means controls the control valve so as to communicate together the first circulation circuit and the second circulation circuit.