A hybrid thermal management system and method coupled with an engine cooling system

Abstract

The present invention discloses a hybrid thermal management system coupled with an engine cooling system, which includes an engine cooling circuit. A water tank is arranged in the engine cooling circuit. The motor cooling module takes water from the outlet of the water tank through a motor water pump and returns the water to the inlet of the water tank to form a motor cooling circuit. The method of the hybrid thermal management system coupled with the engine cooling system includes: when the motor is not working and the engine is working, the motor water pump is closed, and the coolant only cools the engine body accessories through a mechanical water pump; when the motor is working and the engine is not working, the motor water pump is started and the mechanical water pump is closed, and the coolant flows through the motor cooling circuit and the transmission cooling module; when the motor and the engine are working simultaneously, the mechanical water pump and the motor water pump are both turned on, and the flow rate of the coolant flowing through the engine cooling circuit and the motor cooling circuit is controlled by a thermostat. The present invention makes full use of the engine cooling water, reduces the independent water tank and fan, has a simple layout, and is more cost-effective.

Description

Technical Field

[0001] The present invention belongs to the technical field of automotive cooling systems, and particularly relates to a hybrid thermal management system and method coupled with an engine cooling system. Background Art

[0002] As disclosed in Patent CN113650474 A, a hybrid vehicle integrated thermal management system and control method are provided. The engine water cooling system circuit is coupled with the warm water system circuit through a switching valve, the transmission oil cooling system circuit is coupled with the electric drive water system circuit through a water-cooled oil cooler, the air-conditioning refrigerant system circuit is coupled with the electric drive water system circuit through a water-cooled condenser, the engine intake system circuit is coupled with the intercooler water cooling system circuit through a water-cooled intercooler, and the battery air cooling system circuit is coupled with the passenger compartment through a battery blower. However, in the above system, each cooling circuit is independent, including 3 fans and a water tank, and the cooling water resources of the engine cannot be effectively utilized. Summary of the Invention

[0003] The purpose of the present invention is to solve the deficiencies existing in the above background art, and provide a hybrid thermal management system and method coupled with an engine cooling system.

[0004] The technical solution adopted by the present invention is: a hybrid thermal management system coupled with an engine cooling system, including an engine cooling circuit. A water tank is arranged in the engine cooling circuit. The motor cooling module draws water from the outlet of the water tank through a motor water pump and returns water to the inlet of the water tank to form a motor cooling circuit.

[0005] A further preferably structured embodiment is that the motor cooling module is coupled with the transmission cooling module.

[0006] A further preferably structured embodiment is that one end of the water diversion main pipe is connected to the outlet of the water tank. A mechanical water pump and an oil cooler are arranged on the water diversion main pipe. One end of the outlet pipe is connected to the inlet of the water tank. A thermostat is arranged on the water diversion main pipe between the mechanical water pump and the outlet of the water tank.

[0007] A further preferably structured embodiment is that the other end of the water diversion main pipe is connected to the inlet of the cylinder block, the inlet of the air compressor, and one end of the vehicle water intake pipe. The other end of the outlet pipe is connected to the outlet of the cylinder head.

[0008] A further preferably structured embodiment is that the other end of the vehicle water intake pipe is connected to one end of the vehicle water return pipe. The other end of the vehicle water return pipe is connected to the water diversion main pipe between the thermostat and the mechanical water pump.

[0009] A further preferably structured embodiment is that the transmission cooling module is arranged on the pipeline between the vehicle water intake pipe and the vehicle water return pipe.

[0010] A further preferred structure is that a warm air system, a battery heating system and an EGR valve are provided on the pipeline between one end of the water outlet pipe and the other end of the vehicle's return water pipe, and a fuel tank heating system and a urea heating system are provided on the pipeline between the vehicle's water intake pipe and the vehicle's return water pipe.

[0011] A further preferred structure is that the water diversion main pipe is also connected to an expansion water tank.

[0012] A further preferred structure is that the water tank is connected to a fan, and the fan is an electronically controlled silicone oil fan.

[0013] A method for a hybrid thermal management system coupled with an engine cooling system includes the following steps:

[0014] When the motor is not working and the engine is working, the motor water pump is closed, and the coolant only controls the cooling of the engine body accessories through the mechanical water pump.

[0015] When the motor is working and the engine is not working, the motor water pump is started and the mechanical water pump is closed, and the coolant circulates through the motor cooling circuit and the transmission cooling module.

[0016] When the motor and the engine are working simultaneously, the mechanical water pump and the motor water pump are both turned on, and the flow rate through the engine cooling circuit and the motor cooling circuit is controlled by a thermostat.

[0017] The beneficial effects of the present invention are as follows:

[0018] 1. For the present invention, the engine block and some accessories draw water from the engine's small circulation, the motor cooling module and the transmission cooling module are coupled with the engine cooling circuit and draw water from the engine's large circulation, and the temperature and flow rate of the cooling water are controlled by a thermostat, effectively utilizing the engine's cooling water resources, saving parts such as fans and water tanks, and being more concise in layout.

[0019] 2. For the present invention, the motor cooling circuit draws water from the water tank outlet and is controlled by the motor water pump, making full use of the engine cooling water, reducing independent water tanks and fans, having a simple layout and better cost performance.

[0020] 3. The present invention adopts an electronically controlled thermostat to control the water flow rate and water temperature flowing through the engine cooling circuit and the motor cooling circuit, realizing the dual-circulation control of the coolant. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the system connection of the present invention;

[0022] Figure 2 It is a schematic diagram of Embodiment 2 of the present invention;

[0023] Figure 3 It is a schematic diagram of Embodiment 3 of the present invention;

[0024] Figure 4 Schematic diagram of Embodiment 4 of the present invention.

[0025] In the figure, 1 - water tank, 2 - motor cooling module, 3 - motor water pump, 4 - transmission cooling module, 5 - main water intake pipe, 6 - water outlet pipe, 7 - mechanical water pump, 8 - engine oil cooler, 9 - thermostat, 10 - cylinder block, 11 - air compressor, 12 - vehicle water intake pipe, 13 - cylinder head, 14 - vehicle water return pipe, 15 - heating system, 16 - battery heating system, 17 - EGR valve, 18 - fuel tank heating system, 19 - urea heating system, 20 - expansion tank, 21 - fan, 22 - electronically controlled large water pump, 23 - array of electronic fans. Detailed implementation manners

[0026] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments. The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments.

[0027] As Figure 1 shown, a hybrid thermal management system coupled with an engine cooling system of the present invention includes an engine cooling circuit. A water tank 1 is provided in the engine cooling circuit. The motor cooling module 2 takes water from the outlet of the water tank 1 through the motor water pump 3 and returns the water to the inlet of the water tank 1 to form a motor cooling circuit.

[0028] Embodiment 1: The motor cooling module 2 is coupled with the transmission cooling module 4.

[0029] One end of the outlet of the water tank 1 is connected to one end of the main water intake pipe 5. A mechanical water pump 7 and an engine oil cooler 8 are provided on the main water intake pipe 5. One end of the inlet of the water tank 1 is connected to one end of the water outlet pipe 6. A thermostat 9 is provided on the main water intake pipe 5 between the mechanical water pump 7 and the outlet of the water tank 1.

[0030] The other end of the main water intake pipe 5 is connected to the inlet of the cylinder block 10, the inlet of the air compressor 11, and one end of the vehicle water intake pipe 12. The other end of the water outlet pipe 6 is connected to the outlet of the cylinder head 13.

[0031] The other end of the vehicle water intake pipe 12 is connected to one end of the vehicle water return pipe 14. The other end of the vehicle water return pipe 14 is connected to the main water intake pipe 5 between the thermostat 9 and the mechanical water pump 7.

[0032] The transmission cooling module 4 is provided on the pipeline between the vehicle water intake pipe 12 and the vehicle water return pipe 14.

[0033] A pipeline between one end of the water outlet pipe 6 and the other end of the vehicle's return water pipe 14 is provided with a warm air system 15, a battery heating system 16 and an EGR valve 17. A pipeline between the vehicle's water intake pipe 12 and the vehicle's return water pipe 14 is provided with a fuel tank heating system 18 and a urea heating system 19.

[0034] The water diversion main pipe 5 is also connected to an expansion tank 20.

[0035] The water tank 1 is connected to a fan 21, and the fan 21 is an electronically controlled silicone oil fan.

[0036] As Figure 2 shown, Embodiment 2: In the present invention, the mechanical water pump inside the engine can be replaced with an electronically controlled large water pump 22 to improve intelligent and precise control.

[0037] As Figure 3 shown, Embodiment 3: The electronically controlled silicone oil fan is replaced with an array of electronic fans 23, which is beneficial for precise control, and the engine cooling water circuit and the motor cooling water circuit can achieve rapid cooling.

[0038] As Figure 4 shown, Embodiment 4: The transmission cooling module 2 and the motor cooling module 4 are not coupled. The transmission cooling module 4 takes water from inside the engine, and the motor cooling circuit is separately controlled by the motor water pump 3, which is beneficial for accurately controlling the water flow rate and water temperature.

[0039] A method for a hybrid thermal management system coupled with an engine cooling system includes the following steps:

[0040] When the motor is not working and the engine is working, the motor water pump 3 is closed, and the coolant only cools the engine body accessories through the mechanical water pump 7.

[0041] When the motor is working and the engine is not working, the motor water pump 3 is started, the mechanical water pump 7 is closed, and the coolant flows through the motor cooling circuit and the transmission cooling module 4.

[0042] When the motor and the engine are working simultaneously, the mechanical water pump 7 and the motor water pump 3 are both turned on, and the flow rate through the engine cooling circuit and the motor cooling circuit is controlled by the thermostat 9.

[0043] In the present invention, the engine block and some accessories take water from the engine's small cycle. The motor cooling module 2 and the transmission cooling module 4 are coupled with the engine cooling circuit and take water from the engine's large cycle. The temperature and flow rate of the cooling water are controlled by the thermostat 9, effectively utilizing the engine's cooling water resources, saving parts such as the fan 21 and the water tank 1, and being more concise in layout.

[0044] In the present invention, the motor cooling circuit takes water from the water tank outlet and is controlled by the motor water pump 3, making full use of the engine's cooling water, reducing the independent water tank and fan, having a simple layout, and being more cost-effective.

[0045] The present invention adopts an electronic control thermostat to control the water flow rate and water temperature flowing through the engine cooling circuit and the motor cooling circuit, so as to realize the dual-cycle control of the coolant.

[0046] The content not described in detail in this specification belongs to the prior art well known to those skilled in the art.

Claims

1. A hybrid thermal management system coupled to an engine cooling system, including an engine cooling circuit, wherein a water tank (1) is arranged in the engine cooling circuit, and is characterized in that: The motor cooling module (2) draws water from the outlet of the water tank (1) through the motor water pump (3) and returns the water to the inlet of the water tank (1) to form a motor cooling circuit; the motor cooling module (2) is coupled with the transmission cooling module (4). One end of the outlet of the water tank (1) is connected to one end of the water diversion main pipe (5). A mechanical water pump (7) and an oil cooler (8) are provided on the water diversion main pipe (5). One end of the inlet of the water tank (1) is connected to one end of the water outlet pipe (6). A thermostat (9) is provided on the water diversion main pipe (5) between the mechanical water pump (7) and the outlet of the water tank (1). The other end of the water diversion main pipe (5) is connected to the inlet of the cylinder block (10), the inlet of the air compressor (11), and one end of the vehicle water intake pipe (12). The other end of the water outlet pipe (6) is connected to the outlet of the cylinder head (13). The other end of the vehicle water intake pipe (12) is connected to one end of the vehicle water return pipe (14). The other end of the vehicle water return pipe (14) is connected to the water diversion main pipe (5) between the thermostat (9) and the mechanical water pump (7). The transmission cooling module (4) is arranged on the pipeline between the vehicle water intake pipe (12) and the vehicle water return pipe (14). A warm air system (15), a battery heating system (16), and an EGR valve (17) are provided on the pipeline between one end of the water outlet pipe (6) and the other end of the vehicle water return pipe (14). A fuel tank heating system (18) and a urea heating system (19) are provided on the pipeline between the vehicle water intake pipe (12) and the vehicle water return pipe (14). A management method for a hybrid thermal management system coupled with an engine cooling system includes the following steps: When the motor is not working and the engine is working, the motor water pump (3) is closed, and the coolant only controls the cooling of the engine body accessories through the mechanical water pump (7). When the motor is working and the engine is not working, the motor water pump (3) is started, and the mechanical water pump (7) is closed. The coolant circulates through the motor cooling circuit and the transmission cooling module (4). When the motor and the engine work simultaneously, the mechanical water pump (7) and the motor water pump (3) are both turned on, and the flow rate through the engine cooling circuit and the motor cooling circuit is controlled by the thermostat (9).

2. The hybrid thermal management system coupled with the engine cooling system according to claim 1, characterized in that: The water diversion main pipe (5) is also connected to an expansion tank (20).

3. A hybrid thermal management system coupled to an engine cooling system according to claim 1, characterized in that: The water tank (1) is connected to a fan (21), and the fan (21) is an electronically controlled silicone oil fan.

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