CN113565613A

CN113565613A - Engine cooling system and method

Info

Publication number: CN113565613A
Application number: CN202110786938.0A
Authority: CN
Inventors: 黄菲武; 邓光志; 陈明; 马洁高; 潘文军; 程志谋; 缪宣和
Original assignee: Dongfeng Liuzhou Motor Co Ltd
Current assignee: Dongfeng Liuzhou Motor Co Ltd
Priority date: 2021-07-12
Filing date: 2021-07-12
Publication date: 2021-10-29
Anticipated expiration: 2041-07-12
Also published as: CN113565613B

Abstract

The invention discloses an engine cooling system and method. The system comprises: the water outlet of the mechanical water pump is connected with the first port of the double-thermostat assembly through a first water pipe assembly, and the water inlet of the mechanical water pump is connected with the second port of the double-thermostat assembly through a second water pipe assembly; the first end of the heat dissipation water jacket is connected with the water outlet of the mechanical water pump, and the second end of the heat dissipation water jacket is connected with the third port of the double-thermostat assembly; the first end of the radiator is connected with the fourth port of the double-thermostat assembly, and the second end of the radiator is connected with the water inlet of the mechanical water pump; the first end of the warm air device is connected with the fifth port of the double-thermostat assembly, and the second end of the warm air device is connected with the water inlet of the mechanical water pump. According to the system, the third port of the double thermostat is closed when the engine is started, so that the heat radiation of the engine is only conducted to the heat radiation water jacket, the engine is quickly warmed up, and the system provided by the invention changes the circulating water path, and is beneficial to the fine control of the cooling circulation of the engine.

Description

Engine cooling system and method

Technical Field

The invention relates to the technical field of engine cooling, in particular to an engine cooling system and method.

Background

At present, an engine cooling circulation main flow main water pump has two types of an electronic water pump and a mechanical water pump, wherein the electronic water pump can realize that a water path of an engine cylinder sleeve does not circulate after the engine is started, the electronic water pump works after the engine is quickly warmed up, and a circulation water path is started. The technology can realize quick warm-up of the engine and reduce the energy consumption of the water pump, but has high price and is not beneficial to popularization and application. And the mechanical water pump works after the engine is started, the cylinder sleeve water path starts to circulate, the internal circulation is started, and the engine is slowly warmed up. The vehicle warm-air device is connected with the internal circulation, so that the warm-up time of the engine is further prolonged. The warm air device for the vehicle is separated from the internal circulating water cooling area of the engine by arranging the temperature control valve in the prior art, but the warm-up effect of the engine is still poorer than that of an electronic water pump, the warm-up time of the engine of an engine cooling circulating system using a mechanical water pump is long, so that the control of the engine enters a closed loop slowly, and the emission and the oil consumption of the vehicle at a cold start stage are poor.

The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.

Disclosure of Invention

The invention mainly aims to provide an engine cooling system and an engine cooling method, and aims to solve the technical problem that an engine of an engine cooling circulation system using a mechanical water pump in the prior art is long in warming-up time.

To achieve the above object, the present invention provides an engine cooling system including: the system comprises a heat radiation water jacket, a double thermostat assembly, a mechanical water pump, a first water pipe component, a second water pipe component, a heater and a radiator;

the water outlet of the mechanical water pump is connected with the first port of the double-thermostat assembly through the first water pipe component, and the water inlet of the mechanical water pump is connected with the second port of the double-thermostat assembly through the second water pipe component;

the first end of the heat-radiating water jacket is connected with the water outlet of the mechanical water pump, and the second end of the heat-radiating water jacket is connected with the third port of the double-thermostat assembly;

the first end of the radiator is connected with the fourth port of the double-thermostat assembly, and the second end of the radiator is connected with the water inlet of the mechanical water pump;

the first end of the warm air device is connected with the fifth port of the double-thermostat assembly, and the second end of the warm air device is connected with the water inlet of the mechanical water pump.

Optionally, the engine cooling system further comprises: the engine control module is electrically connected with the double-thermostat assembly;

the water temperature sensor is used for detecting the current water temperature of the cooling water flowing into the double-thermostat assembly from the heat radiation water jacket;

the engine control module is used for acquiring the current water temperature, and stopping sending working voltage to the double-thermostat assembly when the current water temperature is lower than a first preset temperature so as to enable the double-thermostat assembly to be in a closed state;

the double-thermostat assembly is used for communicating the first port of the double-thermostat assembly, the second port of the double-thermostat assembly and the fifth port of the double-thermostat assembly when the double-thermostat assembly is in a closed state, so that cooling water circulates among the mechanical water pump, the first water pipe assembly, the double-thermostat assembly, the second water pipe assembly and the warm air device.

Optionally, the engine control module is further configured to, when the current water temperature is within a first preset temperature range, search current electric control information from pre-calibrated electric control information according to a current warm air demand, and send a corresponding current working voltage to the dual thermostat assembly according to the current electric control information;

the double thermostat assembly is further configured to control the opening degrees of the first port of the double thermostat assembly and the third port of the double thermostat assembly under the control of the current working voltage, so that cooling water circulates among the mechanical water pump, the first water pipe assembly, the double thermostat assembly, the second water pipe assembly, the heat dissipation water jacket and the heater unit.

Optionally, the engine control module is further configured to, when the current water temperature is within a second preset temperature range, search target electric control information from pre-calibrated electric control information according to a target warm air requirement, and send a corresponding target working voltage to the dual thermostat assembly according to the target electric control information, where a minimum limit value of the second preset temperature range is a maximum limit value of the first preset temperature range;

the double thermostat assembly is further used for controlling the opening degrees of the first port of the double thermostat assembly and the third port of the double thermostat assembly and controlling the opening degrees of the second port of the double thermostat assembly and the fourth port of the double thermostat assembly under the control of the target working voltage, so that cooling water circulates in the mechanical water pump, the first water pipe assembly, the double thermostat assembly, the second water pipe assembly, the heat dissipation water jacket, the warm air device and the radiator.

Optionally, the engine control module is further configured to send a specified working voltage to the dual thermostat assembly when the current water temperature is higher than a second preset temperature;

the double-thermostat assembly is further used for entering a full-open state under the control of the specified working voltage, closing a first port of the double-thermostat assembly and a second port of the double-thermostat assembly, and communicating a third port of the double-thermostat assembly, a fourth port of the double-thermostat assembly and a fifth port of the double-thermostat assembly, so that cooling water circulates in the mechanical water pump, the heat dissipation water jacket, the double-thermostat assembly, the radiator and the warm air device.

Optionally, the dual thermostat assembly comprises an electronic thermostat and a mechanical thermostat;

the first port of the electronic thermostat is a first port of the dual thermostat assembly, the second port of the electronic thermostat is a third port of the dual thermostat assembly, the third port of the electronic thermostat is connected with the first port of the mechanical thermostat through a pipeline, a fifth port of the dual thermostat assembly is arranged on the pipeline, the second port of the mechanical thermostat is a second port of the dual thermostat assembly, and the third port of the mechanical thermostat is a fourth port of the dual thermostat assembly;

the engine control module is further configured to search current electric control information from pre-calibrated electric control information according to a current warm air demand when the current water temperature is within a first preset temperature range, and send corresponding current working voltage to the electronic thermostat according to the current electric control information;

the electronic thermostat is used for controlling the opening degrees of a first port of the electronic thermostat and a second port of the electronic thermostat under the control of the current working voltage;

the mechanical thermostat is used for communicating a first port of the mechanical thermostat with a second port of the mechanical thermostat when the mechanical thermostat is in a closed state, so that cooling water circulates among the mechanical water pump, the first water pipe assembly, the double-thermostat assembly, the second water pipe assembly, the heat radiation water jacket and the air heater;

and the mechanical thermostat is in a closed state when the current water temperature is in a first preset temperature range.

Optionally, the engine control module is further configured to, when the current water temperature is within a second preset temperature range, search target electric control information from electric control information calibrated in advance according to a target warm air demand, and send a corresponding target working voltage to the electronic thermostat according to the target electric control information;

the electronic thermostat is further used for controlling the opening degrees of a first port of the electronic thermostat and a second port of the electronic thermostat under the control of the target working voltage;

the mechanical thermostat is further configured to control the opening degrees of a second port of the mechanical thermostat and a third port of the mechanical thermostat, so that cooling water circulates among the mechanical water pump, the first water pipe assembly, the dual-thermostat assembly, the second water pipe assembly, the heat radiation water jacket, the heater unit, and the radiator;

wherein the mechanical thermostat is in a partially open state when the current water temperature is within a second preset temperature range.

Optionally, the engine control module is further configured to send a specified working voltage to the electronic thermostat when the current water temperature is higher than a second preset temperature;

the electronic thermostat is also used for entering a full-open state under the control of the specified working voltage and communicating a second port of the electronic thermostat with a third port of the electronic thermostat;

the mechanical thermostat is further used for communicating a first port of the mechanical thermostat with a third port of the mechanical thermostat when the mechanical thermostat is in a fully-opened state, so that cooling water circulates among the mechanical water pump, the heat radiation water jacket, the double-thermostat assembly, the radiator and the air heater;

wherein the mechanical thermostat is in a fully-open state when the current water temperature is higher than a second preset temperature.

Further, to achieve the above object, the present invention also proposes an engine cooling method applied to the engine cooling system as described above, the engine cooling system including: the system comprises a heat radiation water jacket, a double thermostat assembly, a mechanical water pump, a first water pipe component, a second water pipe component, a heater and a radiator;

the first end of the warm air device is connected with the fifth port of the double-thermostat assembly, and the second end of the warm air device is connected with the water inlet of the mechanical water pump;

the engine cooling system further includes: the engine control module is electrically connected with the double-thermostat assembly;

the engine cooling method includes:

the water temperature sensor detects the current water temperature of the cooling water flowing into the double-thermostat assembly from the heat radiation water jacket;

the engine control module acquires the current water temperature, and stops sending working voltage to the double-thermostat assembly when the current water temperature is lower than a first preset temperature so as to enable the double-thermostat assembly to be in a closed state;

when the double thermostat assembly is in a closed state, the first port of the double thermostat assembly, the second port of the double thermostat assembly and the fifth port of the double thermostat assembly are communicated, so that cooling water circulates among the mechanical water pump, the first water pipe assembly, the double thermostat assembly, the second water pipe assembly and the air heater.

Optionally, after the engine control module obtains the current water temperature, the method further comprises:

when the current water temperature is in a first preset temperature range, the engine control module searches current electric control information from pre-calibrated electric control information according to the current warm air requirement, and sends corresponding current working voltage to the double-thermostat assembly according to the current electric control information;

and the double-thermostat assembly controls the opening degrees of the first port of the double-thermostat assembly and the third port of the double-thermostat assembly under the control of the current working voltage so as to enable cooling water to circulate in the mechanical water pump, the first water pipe assembly, the double-thermostat assembly, the second water pipe assembly, the heat dissipation water jacket and the warm air device.

The engine cooling system provided by the invention comprises: the system comprises a heat radiation water jacket, a double thermostat assembly, a mechanical water pump, a first water pipe component, a second water pipe component, a heater and a radiator; the water outlet of the mechanical water pump is connected with the first port of the double-thermostat assembly through a first water pipe assembly, and the water inlet of the mechanical water pump is connected with the second port of the double-thermostat assembly through a second water pipe assembly; the first end of the heat dissipation water jacket is connected with the water outlet of the mechanical water pump, and the second end of the heat dissipation water jacket is connected with the third port of the double-thermostat assembly; the first end of the radiator is connected with the fourth port of the double-thermostat assembly, and the second end of the radiator is connected with the water inlet of the mechanical water pump; the first end of the warm air device is connected with the fifth port of the double-thermostat assembly, and the second end of the warm air device is connected with the water inlet of the mechanical water pump. The design of the double thermostats, the water pipe assembly and the whole system changes the trend of a circulating water path, is beneficial to the fine control of the cooling circulation of the engine, seals the third port of the double thermostats when the engine is started, enables the heat dissipation of the engine to be only conducted to the heat dissipation water jacket, realizes the quick warming-up of the engine, reduces the emission of the cold starting stage of the engine, changes the circulating route of cooling water through the double thermostats in the working process of the engine, and is beneficial to the engine to be at the optimal working temperature.

Drawings

FIG. 1 is a block diagram of a first embodiment of an engine cooling system according to the present invention;

FIG. 2 is a block diagram of a conventional engine cooling cycle system;

FIG. 3 is a block diagram of a second embodiment of the engine cooling system of the present invention;

FIG. 4 is a block diagram of a third embodiment of an engine cooling system according to the present invention;

FIG. 5 is a schematic flow chart of a first embodiment of the engine cooling method of the present invention.

The reference numbers illustrate:

reference numerals	Name (R)	Reference numerals	Name (R)
				10	Radiating water jacket	70	Heat radiator
20	Double thermostat assembly	80	Engine control module
				30	Mechanical water pump	90	Water temperature sensor
40	First water pipe assembly	100	Electronic thermostat
				50	Second water pipe assembly	110	Mechanical thermostat
60	Warm air device

The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.

Detailed Description

It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, an engine cooling system according to an embodiment of the present invention is provided, and fig. 1 is a block diagram showing a structure of a first embodiment of the engine cooling system according to the present invention.

In this embodiment, the engine cooling system includes: the system comprises a heat radiation water jacket 10, a double-thermostat assembly 20, a mechanical water pump 30, a first water pipe component 40, a second water pipe component 50, a heating device 60 and a radiator 70;

the water outlet of the mechanical water pump 30 is connected with the first port of the dual thermostat assembly 20 through the first water pipe component 40, and the water inlet of the mechanical water pump 30 is connected with the second port of the dual thermostat assembly 20 through the second water pipe component 50;

the first end of the heat-radiating water jacket 10 is connected with the water outlet of the mechanical water pump 30, and the second end of the heat-radiating water jacket 10 is connected with the third port of the double-thermostat assembly 20;

a first end of the radiator 70 is connected to the fourth port of the dual thermostat assembly 20, and a second end of the radiator 70 is connected to the water inlet of the mechanical water pump 30;

a first end of the heater unit 60 is connected to the fifth port of the dual thermostat assembly 20, and a second end of the heater unit 60 is connected to the water inlet of the mechanical water pump 30.

It will be appreciated that the dual thermostat assembly 20 is assumed to include a first thermostat that controls the opening of the first and third ports and distributes the flow of cooling water to the first water tube assembly 40 and the heat sink jacket 10 under different temperature conditions and a second thermostat that controls the opening of the second and fourth ports and distributes the flow of cooling water to the second water tube assembly 50 and the radiator 70 under different temperature conditions.

It should be noted that, when the first thermostat and the second thermostat are both in the closed state, the first port and the second port are fully open, the third port and the fourth port are closed, the cooling water flowing out of the mechanical water pump 30 flows to the dual thermostat assembly 20 through the first water pipe assembly 40, a part of the cooling water flowing into the dual thermostat assembly 20 flows to the air heater 60, and a part of the cooling water flows back to the mechanical water pump 30 through the second water pipe assembly 50, and for convenience of description, a circulation route in which the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, and the second water pipe assembly 50 is referred to as a first circulation water path. When both the first thermostat and the second thermostat are in the closed state, the cooling water flows in the first circulation water path and the heater unit 60.

It is to be understood that, when the first thermostat is in a partially opened state, the first port and the third port are half opened, and a part of the cooling water circulates in the first circulation water path, and a part of the cooling water flows from the mechanical water pump 30 to the heat radiation water jacket 10, the dual thermostat assembly 20, the air heater 60, and flows back to the mechanical water pump 30, for convenience of description, a circulation route in which the cooling water flows back to the mechanical water pump 30 via the mechanical water pump 30, the heat radiation water jacket 10, the dual thermostat assembly 20, and the air heater 60 is referred to as a second circulation water path, and when the first thermostat is in a partially opened state and the second thermostat is in a closed state, the cooling water flows in the first circulation water path and the second circulation water path.

It should be noted that, when the first thermostat and the second thermostat are both in the partially opened state, the first port, the second port, the third port, and the fourth port are half opened, a part of the cooling water circulates in the first circulation water path, a part of the cooling water circulates in the second circulation water path, and a part of the cooling water flows from the dual thermostat assembly 20 to the radiator 70, for convenience of description, a circulation route in which the cooling water flows back to the mechanical water pump 30 via the mechanical water pump 30, the heat radiation water jacket 10, the dual thermostat assembly 20, and the radiator 70 is referred to as a third circulation water path, and when the first thermostat and the second thermostat are both in the partially opened state, the cooling water flows in the first circulation water path, the second circulation water path, and the third circulation water path.

It should be understood that when the first thermostat and the second thermostat are both in the fully open state, the first port and the second port are closed, the third port and the fourth port are fully open, the cooling water flows to the heat radiation water jacket 10, the dual thermostat assembly 20, a part of the cooling water flows to the heater unit 60, and the other all flows to the radiator 70 via the mechanical water pump 30, and when the first thermostat and the second thermostat are both in the fully open state, the cooling water flows in the second circulation water path and the third circulation water path.

Referring to fig. 2, fig. 2 is a structural block diagram of a conventional engine cooling circulation system, in fig. 2, 1 is a mechanical water pump, 2 is a heat dissipation water jacket, 3 is a water temperature sensor, 4 is an electronic thermostat, 5 is a heating device, 6 is a radiator, the mechanical water pump works after the engine is started, a cylinder liner water path of the heat dissipation water jacket starts to circulate, an internal circulation is started, at this time, a part of cooling water flows from the mechanical water pump to the heating device through the heat dissipation water jacket, and a part of cooling water flows back to the mechanical water pump from the mechanical water pump through the heat dissipation water jacket, the heating device for the vehicle is connected with the internal circulation, the engine warm-up time is further prolonged, the engine warm-up time is long, the engine control is slow to enter a closed loop, and the vehicle has poor emission and poor oil consumption in a cold start stage. In this embodiment, after the engine is started, the third port of the dual thermostat is in a closed state, the cooling water flows in the first circulation water path and the air heater 60, and the water flow in the heat dissipation water jacket 10 does not participate in circulation, so that the heat dissipation of the engine is conducted only to the heat dissipation water jacket 10, and the rapid heating of the engine is realized.

The engine cooling system proposed by the present embodiment includes: the system comprises a heat radiation water jacket 10, a double-thermostat assembly 20, a mechanical water pump 30, a first water pipe component 40, a second water pipe component 50, a heating device 60 and a radiator 70; the water outlet of the mechanical water pump 30 is connected with the first port of the double thermostat assembly 20 through a first water pipe component 40, and the water inlet of the mechanical water pump 30 is connected with the second port of the double thermostat assembly 20 through a second water pipe component 50; the first end of the heat-radiating water jacket 10 is connected with the water outlet of the mechanical water pump 30, and the second end of the heat-radiating water jacket 10 is connected with the third port of the double-thermostat assembly 20; a first end of the radiator 70 is connected with a fourth port of the dual thermostat assembly 20, and a second end of the radiator 70 is connected with a water inlet of the mechanical water pump 30; a first end of the heater unit 60 is connected to the fifth port of the dual thermostat assembly 20, and a second end of the heater unit 60 is connected to the water inlet of the mechanical water pump 30. The design of the double thermostats, the water pipe assembly and the whole system changes the trend of a circulating water path, is beneficial to the fine control of the cooling circulation of the engine, seals the third port of the double thermostats when the engine is started, leads the heat dissipation of the engine to be only conducted to the heat dissipation water jacket 10, realizes the quick warming-up of the engine, reduces the emissions of the cold starting stage of the engine, changes the circulating route of cooling water through the double thermostats in the working process of the engine, and is beneficial to the engine to be at the optimal working temperature.

Referring to fig. 3, fig. 3 is a block diagram showing the structure of a second embodiment of the cooling system for an engine according to the present invention.

Based on the first embodiment described above, the engine cooling system in this embodiment further includes: the engine control module 80 and the water temperature sensor 90, the water temperature sensor 90 is disposed on a pipeline connecting the heat dissipation water jacket 10 and the third port of the dual thermostat assembly 20, and is connected to the engine control module 80, and the engine control module 80 is electrically connected to the dual thermostat assembly 20;

the water temperature sensor 90 is configured to detect a current water temperature of the cooling water flowing from the heat radiation water jacket 10 into the dual thermostat assembly 20.

The engine control module 80 is configured to obtain the current water temperature, and stop sending the working voltage to the dual thermostat assembly 20 when the current water temperature is lower than a first preset temperature, so that the dual thermostat assembly 20 is in a closed state. In this embodiment, the engine control module 80 is a core component of engine control for an automobile, controls fuel injection and ignition timing of the engine according to input information of various sensors, and provides an optimal control instruction for other output devices. When the engine is started, the current water temperature is lower than a first preset temperature, at this time, the engine control module 80 does not send the working voltage to the dual thermostat assembly 20, the dual thermostat assembly 20 is in a closed state, the dual thermostat assembly 20 is originally in a half-open state or an open state, after heat dissipation and cooling processing, when the internal water temperature is sufficiently low, the engine control module 80 stops sending the working voltage to the dual thermostat assembly 20, and the dual thermostat assembly 20 enters the closed state.

The dual thermostat assembly 20 is configured to communicate the first port of the dual thermostat assembly 20, the second port of the dual thermostat assembly 20, and the fifth port of the dual thermostat assembly 20 when the dual thermostat assembly 20 is in a closed state, so that cooling water circulates among the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, the second water pipe assembly 50, and the air heater 60. In this embodiment, when the dual thermostat assembly 20 is in the closed state, the third port and the fourth port are closed, the first port, the second port and the fifth port are communicated, so that the cooling water flows in the first circulation water channel and the air heater 60, at this time, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20 and the second water pipe assembly 50, and a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20 and the air heater 60.

It should be noted that when the current water temperature is lower than the first preset temperature, the water flow in the engine cooling water jacket 10 does not circulate, taking the first preset temperature as 60 ℃ as an example for description, the engine control module 80 monitors the engine water temperature, and when the engine water temperature is lower than 60 ℃, the dual thermostat assembly 20 is in a non-power state and is in a closed state. Cooling water (not heated by the engine heat dissipation water jacket 10) circulates in the first circulation water channel and the air heating device 60, so that the power consumption of the water pump is reduced, meanwhile, the engine heat dissipation is only conducted to the engine heat dissipation water jacket 10, the water temperature of the engine can be increased to 60 ℃ in cold weather, and the engine can be quickly warmed up.

In an embodiment, the engine control module 80 is further configured to, when the current water temperature is within a first preset temperature range, search current electric control information from pre-calibrated electric control information according to a current warm air demand, and send a corresponding current working voltage to the dual thermostat assembly 20 according to the current electric control information. In this embodiment, the minimum threshold of the first preset temperature range is the first preset temperature, the engine control module 80 determines the requirements of the actual vehicle for the warm air and the oil consumption of the entire vehicle according to the data collected by each sensor, searches the current electronic control information from the pre-calibrated electronic control information according to the determined requirements, the pre-calibrated electronic control information includes the warm air requirement and the corresponding electronic control information, calibrates the control electronic control information of the dual thermostat assembly 20 in advance to obtain the pre-calibrated electronic control information, when the current warm air requirement is obtained, searches the current electronic control information corresponding to the current warm air requirement from the pre-calibrated electronic control information, and the engine control module 80 realizes the distribution and control of the cooling water flow of the first water pipe assembly 40 and the heat dissipation water jacket 10 by controlling the power supply voltage or the working power of the dual thermostat assembly 20.

The dual thermostat assembly 20 is further configured to control the opening degrees of the first port of the dual thermostat assembly 20 and the third port of the dual thermostat assembly 20 under the control of the current operating voltage, so that cooling water circulates among the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, the second water pipe assembly 50, the heat dissipation water jacket 10, and the air heater 60. In this embodiment, when the current water temperature is within the first preset temperature range, the first thermostat of the dual thermostat assembly 20 is in a half-open state, the second thermostat is in a closed state, the first port and the third port are half-open, the second port and the fifth port are all open, the fourth port is closed, so that the cooling water circulates in the first circulation water path and the second circulation water path, at this time, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, and the second water pipe assembly 50, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, and the air heater 60, and a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat dissipation water jacket 10, the dual thermostat assembly 20, and the air heater 60.

It can be understood that when the current water temperature is in the first preset temperature range, the water flow in the engine cooling water jacket 10 enters the circulation and circulates through the second circulation water path, which is exemplified by the first preset temperature range being 60-85 ℃, the engine control module 80 monitors the engine water temperature, and when the engine water temperature is in the range of 60-85 ℃, the first thermostat is partially opened and the second thermostat is closed by supplying power to the dual thermostat assembly 20. The cooling water flowing to the first water pipe assembly 40 and the engine heat dissipation water jacket 10 is distributed by controlling the power supply of the first thermostat according to the requirements of the actual vehicle on warm air and the oil consumption of the whole vehicle, and the requirement of the warm air after the engine is rapidly warmed up is guaranteed.

In an embodiment, the engine control module 80 is further configured to search target electric control information from pre-calibrated electric control information according to a target warm air requirement when the current water temperature is within a second preset temperature range, and send a corresponding target working voltage to the dual thermostat assembly 20 according to the target electric control information, where a minimum limit value of the second preset temperature range is a maximum limit value of the first preset temperature range.

The dual thermostat assembly 20 is further configured to control the opening degrees of the first port of the dual thermostat assembly 20 and the third port of the dual thermostat assembly 20, and control the opening degrees of the second port of the dual thermostat assembly 20 and the fourth port of the dual thermostat assembly 20 under the control of the target operating voltage, so that cooling water circulates among the mechanical water pump 30, the first water pipe component 40, the dual thermostat assembly 20, the second water pipe component 50, the heat dissipation water jacket 10, the air heater 60, and the radiator 70. In this embodiment, when the current water temperature is in the second preset temperature range, the first thermostat and the second thermostat of the dual thermostat assembly 20 are in a half-open state, and the first port, the second port, the third port and the fourth port are half-open, so that the cooling water flows in the first circulation water path, the second circulation water path and the third circulation water path, at this time, a part of the cooling water flows back to the mechanical water pump 30 via the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20 and the second water pipe assembly 50, a part of the cooling water flows back to the mechanical water pump 30 via the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20 and the air warming device 60, a part of the cooling water flows back to the mechanical water pump 30 via the mechanical water pump 30, the heat dissipation water jacket 10, the dual thermostat assembly 20 and the heat dissipater 70, and a part of the cooling water flows back to the mechanical water pump 30 via the mechanical water pump 30, the heat dissipation water jacket 10 and the heat dissipation water jacket 10, The double thermostat assembly 20 and the heater unit 60 flow back to the mechanical water pump 30.

It should be noted that when the current water temperature is in the second preset temperature range, the water flow in the engine heat dissipation water jacket 10 circulates through the second circulation water path and the third circulation water path, which is exemplified by the second preset temperature range of 85 ℃ to 95 ℃, the engine control module 80 monitors the engine water temperature, and when the engine water temperature is in the range of 85 ℃ to 95 ℃, the first thermostat is partially opened to distribute the flow of the cooling water in the first water pipe assembly 40 and the engine heat dissipation water jacket 10 by supplying power to the dual thermostat assembly 20, and the second thermostat is partially opened to distribute the flow of the cooling water in the second water pipe assembly 50 and the external radiator 70. In the present embodiment, the power supply of the dual thermostat assembly 20 is used to keep the engine at the optimum working temperature (90-95 ℃).

In one embodiment, the engine control module 80 is further configured to send a specified operating voltage to the dual thermostat assembly 20 when the current water temperature is higher than a second predetermined temperature. In this embodiment, the specified operating voltage is the maximum operating voltage. The second preset temperature may be a maximum limit value of the second preset temperature range, or a temperature value greater than the maximum limit value of the second preset temperature range.

The dual thermostat assembly 20 is further configured to enter a fully-opened state under the control of the specified operating voltage, and close the first port of the dual thermostat assembly 20 and the second port of the dual thermostat assembly 20, and communicate the third port of the dual thermostat assembly 20, the fourth port of the dual thermostat assembly 20, and the fifth port of the dual thermostat assembly 20, so that cooling water circulates among the mechanical water pump 30, the heat dissipation water jacket 10, the dual thermostat assembly 20, the radiator 70, and the air heater 60. In this embodiment, when the current water temperature is higher than the second preset temperature, the first thermostat and the second thermostat of the dual thermostat assembly 20 are both in a fully open state, the first port and the second port are closed, the third port and the fourth port are fully open, so that the cooling water flows in the second circulation water path and the third circulation water path, at this time, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat dissipation water jacket 10, the dual thermostat assembly 20, and the radiator 70, and a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat dissipation water jacket 10, the dual thermostat assembly 20, and the air warming device 60.

It can be understood that when the current water temperature is higher than the second preset temperature, the water flow in the engine cooling water jacket 10 circulates through the second circulation water path and the third circulation water path, which is described by taking the second preset temperature as 110 ℃, by supplying power to the dual thermostat assembly 20, the first thermostat and the second thermostat are all opened, the first water pipe assembly 40 and the second water pipe assembly 50 are cut off, the engine cooling water flows through the engine cooling water jacket 10 to the external radiator 70, and the heat dissipation power of the radiator 70 is maximized.

Further, the engine control module 80 is further configured to, when the current water temperature is within a third preset temperature range, search for first electrical control information from pre-calibrated electrical control information according to a first warm air requirement, and send a corresponding first working voltage to the dual thermostat assembly 20 according to the first electrical control information, where a minimum limit value of the third preset temperature range is a maximum limit value of the second preset temperature range;

the dual thermostat assembly 20 is further configured to control the first port of the dual thermostat assembly 20 and the opening degree of the third port of the dual thermostat assembly 20 under the control of the first operating voltage, close the second port of the dual thermostat assembly 20, and communicate the fourth port of the dual thermostat assembly 20 and the fifth port of the dual thermostat assembly 20, so that cooling water circulates among the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, the heat dissipation water jacket 10, the air heater 60, and the radiator 70.

When the current water temperature is within the third preset temperature range, the first thermostat of the dual thermostat assembly 20 is in a half-open state, the second thermostat is in a full-open state, the first port and the third port are half-open, the second port is closed, the fourth port is full-open, so that the cooling water flows in the first water pipe assembly 40, the second circulating water passage and the third circulating water passage, at this time, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat radiation water jacket 10, the dual thermostat assembly 20 and the radiator 70, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20 and the radiator 70, and a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat radiation water jacket 10, the dual thermostat assembly 20 and the air heater 60.

For example, the first thermostat is set to start to open at 60 ℃, fully open at 110 ℃ or higher, the second thermostat has the characteristics that the second thermostat starts to open at 85 ℃, fully open at 95 ℃ or higher, the third preset temperature range is 95-110 ℃, when the current water temperature is 95-110 ℃, power is supplied to the dual-thermostat assembly 20, the first thermostat of the dual-thermostat assembly 20 is in a half-open state, the second thermostat is in a fully-open state, at this time, the flow distribution of the cooling water of the first water pipe assembly 40 and the engine cooling water jacket 10 is performed by controlling the power supply of the dual-thermostat assembly 20, the second water pipe assembly 50 is cut off, and the engine cooling water flows through the first water pipe assembly 40 and the engine cooling water jacket 10 to the external radiator 70.

The engine cooling system of the present embodiment further includes: the engine control module 80 and the water temperature sensor 90, the water temperature sensor 90 is arranged on a pipeline connecting the heat dissipation water jacket 10 and the third port of the double-thermostat assembly 20, and is connected with the engine control module 80, and the engine control module 80 is electrically connected with the double-thermostat assembly 20; the water temperature sensor 90 detects the current water temperature of the cooling water flowing from the heat radiation water jacket 10 into the dual thermostat assembly 20; the engine control module 80 acquires the current water temperature, and stops sending the working voltage to the dual thermostat assembly 20 when the current water temperature is lower than a first preset temperature, so that the dual thermostat assembly 20 is in a closed state; when the dual thermostat assembly 20 is in the closed state, the first port of the dual thermostat assembly 20, the second port of the dual thermostat assembly 20, and the fifth port of the dual thermostat assembly 20 are communicated with each other, so that the cooling water circulates among the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, the second water pipe assembly 50, and the air heater 60. Through designing two thermostats, water pipe subassembly and entire system, change the trend in circulation water route, be favorable to the control that becomes more meticulous of engine cooling cycle, when the engine starts, through the current temperature of engine control module 80 monitoring water temperature sensor 90, when current temperature is less than first preset temperature, two thermostat assembly 20 is in the closed condition, seal the third port of two thermostats, make the heat dissipation of engine only conduct to heat dissipation water jacket 10, realize the quick warm-up of engine, reduce the emission of engine cold start stage, change the circulation route of cooling water through two thermostats in engine course, be favorable to the engine to be in best operating temperature.

Referring to fig. 4, fig. 4 is a block diagram showing the structure of a third embodiment of the cooling system for an engine according to the present invention.

Based on the first and second embodiments, the dual thermostat assembly 20 of the present embodiment includes an electronic thermostat 100 and a mechanical thermostat 110;

the first port of the electronic thermostat 100 is a first port of the dual thermostat assembly 20, the second port of the electronic thermostat 100 is a third port of the dual thermostat assembly 20, the third port of the electronic thermostat 100 is connected to the first port of the mechanical thermostat 110 through a pipe, the pipe is provided with a fifth port of the dual thermostat assembly 20, the second port of the mechanical thermostat 110 is a second port of the dual thermostat assembly 20, and the third port of the mechanical thermostat 110 is a fourth port of the dual thermostat assembly 20;

the engine control module 80 is further configured to, when the current water temperature is within a first preset temperature range, search current electric control information from the pre-calibrated electric control information according to a current warm air demand, and send a corresponding current working voltage to the electronic thermostat 100 according to the current electric control information. In this embodiment, the minimum threshold of the first preset temperature range is the first preset temperature, the engine control module 80 determines the requirements of the real vehicle for the warm air and the oil consumption of the whole vehicle according to the data collected by the sensors, searches the current electronic control information from the pre-calibrated electronic control information according to the determined requirements, and realizes the distribution and control of the cooling water flow of the first water pipe assembly 40 and the heat dissipation water jacket 10 by controlling the power supply voltage or the working power of the electronic thermostat 100.

The electronic thermostat 100 is configured to control the opening degrees of the first port of the electronic thermostat 100 and the second port of the electronic thermostat 100 under the control of the current operating voltage. In this embodiment, the electronic thermostat 100 controls the opening degrees of the first port and the second port, which is equivalent to the dual thermostat assembly 20 controlling the opening degrees of the first port and the third port. The third port of the electronic thermostat 100 is always open and connected to the mechanical thermostat 110, and the cooling water flowing into the electronic thermostat 100 is transmitted to the mechanical thermostat 110, and the fifth port of the dual thermostat assembly 20 located on the pipeline connecting the electronic thermostat 100 and the mechanical thermostat 110 is equivalent to being connected to the cavity of the dual thermostat assembly 20 and always open, so long as water flows through the dual thermostat assembly 20, some water flows to the air heater 60 through the fifth port of the dual thermostat assembly 20.

The mechanical thermostat 110 is configured to communicate a first port of the mechanical thermostat 110 with a second port of the mechanical thermostat 110 when the mechanical thermostat 110 is in a closed state, so as to circulate cooling water in the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, the second water pipe assembly 50, the heat radiation water jacket 10, and the air heater 60;

wherein the mechanical thermostat 110 is in a closed state when the current water temperature is in a first preset temperature range. In this embodiment, the first port of the mechanical thermostat 110 assembly is connected to the electronic thermostat 100 and is always in an open state, and when the mechanical thermostat 110 is in a closed state, the second port is opened and the third port is closed, which corresponds to the dual thermostat assembly 20 communicating with the second port of the dual thermostat assembly 20 and closing the fourth port of the dual thermostat assembly 20. In a specific implementation, the opening temperature of the mechanical thermostat 110 is set to be greater than the opening temperature of the electronic thermostat 100, and when the current water temperature is within the first preset temperature range, the electronic thermostat 100 has already started to open, while the mechanical thermostat 110 is still in the closed state.

It can be understood that, when the current water temperature is within the first preset temperature range, the electronic thermostat 100 is in a half-open state, the mechanical thermostat 110 is in a closed state, the first port and the second port of the electronic thermostat 100 are half-open, the third port of the electronic thermostat 100 is open, the first port and the second port of the mechanical thermostat 110 are open, the third port of the mechanical thermostat 110 is closed, which is equivalent to half-open the first port and the third port of the dual-thermostat assembly 20, the second port and the fifth port are fully open, and the fourth port is closed, so that the cooling water circulates in the first circulation water path and the second circulation water path, and at this time, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual-thermostat assembly 20, and the second water pipe assembly 50, and a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual-thermostat assembly 20, and the mechanical water pump assembly 20, The air heater 60 flows back to the mechanical water pump 30, and a part of cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat radiation water jacket 10, the double-thermostat assembly 20 and the air heater 60.

It should be noted that when the current water temperature is within a first preset temperature range, the water flow in the engine cooling water jacket 10 enters a circulation mode, and circulates through a second circulation water path, which is described by taking the first preset temperature range as an example, the engine control module 80 monitors the engine water temperature, and when the engine water temperature is within 60 ℃ to 85 ℃, the electronic thermostat 100 is partially turned on by supplying power to the electronic thermostat 100, and since the temperature has not yet reached the turn-on temperature of the mechanical thermostat 110, the mechanical thermostat 110 is turned off. The cooling water flowing to the first water pipe assembly 40 and the engine heat dissipation water jacket 10 is distributed by controlling the power supply of the electronic thermostat 100 according to the requirements of the actual vehicle on warm air and the oil consumption of the whole vehicle, and the requirement of the warm air after the engine is rapidly warmed up is guaranteed.

Further, when the current water temperature is lower than the first preset temperature, the electronic thermostat 100 is in a non-power state, and communicates the first port of the electronic thermostat 100 with the third port of the electronic thermostat 100, and closes the second port of the electronic thermostat 100. In this embodiment, when the electronic thermostat 100 is not powered on, the second port of the electronic thermostat 100 connected to the heat dissipation water jacket 10 is closed, the first port of the electronic thermostat 100 connected to the first water pipe assembly 40 is opened, and the cooling water passing through the electronic thermostat 100 flows to the third port of the electronic thermostat 100 through the first port of the electronic thermostat 100, and flows to the heater unit 60 and the mechanical thermostat 110.

The mechanical thermostat 110 is configured to communicate a first port of the mechanical thermostat 110 with a second port of the mechanical thermostat 110 when the mechanical thermostat 110 is in a closed state, so as to circulate cooling water through the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, the second water pipe assembly 50, and the heating device 60;

wherein the mechanical thermostat 110 is in a closed state when the current water temperature is lower than a first preset temperature. In this embodiment, when the mechanical thermostat 110 is in the closed state, the third port of the mechanical thermostat 110 is closed, and the cooling water flowing in through the first port of the mechanical thermostat 110 is distributed to the second port of the mechanical thermostat 110 and all flows into the second water tube assembly 50.

It can be understood that, when the current water temperature is lower than the first preset temperature, the electronic thermostat 100 and the mechanical thermostat 110 are in a closed state, the first port and the third port of the electronic thermostat 100 are opened, the second port of the electronic thermostat 100 is closed, the first port and the second port of the mechanical thermostat 110 are opened, the third port of the mechanical thermostat 110 is closed, which is equivalent to closing the third port and the fourth port of the dual-thermostat assembly 20, and the first port, the second port and the fifth port of the dual-thermostat assembly 20 are communicated, so that the cooling water flows in the first circulation water channel and the air heater 60, and at this time, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual-thermostat assembly 20 and the second water pipe assembly 50, and a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the first water pipe assembly 40, the dual-thermostat assembly 20, the mechanical water pump 30, The heater unit 60 flows back to the mechanical water pump 30.

It should be noted that when the current water temperature is lower than the first preset temperature, the water flow in the engine cooling water jacket 10 does not circulate, taking the first preset temperature as 60 ℃ as an example for description, the engine control module 80 monitors the engine water temperature, and when the engine water temperature is lower than 60 ℃, the electronic thermostat 100 is in a power-off state, and both the electronic thermostat 100 and the mechanical thermostat 110 are in a closed state. Cooling water (not heated by the engine heat dissipation water jacket 10) circulates in the first circulation water channel and the air heating device 60, so that the power consumption of the water pump is reduced, meanwhile, the engine heat dissipation is only conducted to the engine heat dissipation water jacket 10, the water temperature of the engine can be increased to 60 ℃ in cold weather, and the engine can be quickly warmed up.

In an embodiment, the engine control module 80 is further configured to, when the current water temperature is within a second preset temperature range, search target electric control information from electric control information calibrated in advance according to a target warm air requirement, and send a corresponding target working voltage to the electronic thermostat 100 according to the target electric control information;

the electronic thermostat 100 is further configured to control the opening degrees of a first port of the electronic thermostat 100 and a second port of the electronic thermostat 100 under the control of the target operating voltage;

the mechanical thermostat 110 is further configured to control the opening degrees of the second port of the mechanical thermostat 110 and the third port of the mechanical thermostat 110, so that cooling water circulates among the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, the second water pipe assembly 50, the heat-dissipating water jacket 10, the air heater 60, and the radiator 70;

wherein the mechanical thermostat 110 is in a partially opened state when the current water temperature is in a second preset temperature range. In this embodiment, the mechanical thermostat 110 controls the opening degrees of the second port and the third port of the mechanical thermostat 110 when in a partially opened state, and the electronic thermostat 100 controls the opening degrees of the first port and the second port of the electronic thermostat 100 when in a partially opened state, which is equivalent to the dual thermostat assembly 20 controlling the opening degrees of the first port and the third port of the dual thermostat assembly 20 and controlling the opening degrees of the second port and the fourth port of the dual thermostat assembly 20.

It can be understood that when the current water temperature is in the second preset temperature range, the electronic thermostat 100 and the mechanical thermostat 110 are both in a half-open state, the first port and the second port of the electronic thermostat 100 are half-open, the third port of the electronic thermostat 100 is open, the first port of the mechanical thermostat 110 is open, the second port and the third port of the mechanical thermostat 110 are half-open, which is equivalent to half-open of the first port, the second port, the third port and the fourth port of the dual thermostat, so that the cooling water flows in the first circulating water path, the second circulating water path and the third circulating water path, at this time, a part of the cooling water flows back to the mechanical water pump 30 via the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20 and the second water pipe assembly 50, a part of the cooling water flows back to the mechanical water pump 30 via the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20 and the air heater 60, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat radiation water jacket 10, the double-thermostat assembly 20 and the radiator 70, and a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat radiation water jacket 10, the double-thermostat assembly 20 and the air heater 60.

It should be noted that when the current water temperature is in the second preset temperature range, the water flow in the engine heat dissipation water jacket 10 circulates through the second circulation water path and the third circulation water path, which is exemplified by that the second preset temperature range is 85 ℃ to 95 ℃, the engine control module 80 monitors the engine water temperature, and when the engine water temperature is 85 ℃ to 95 ℃, the electronic thermostat 100 is partially turned on by supplying power to the electronic thermostat 100, so as to distribute the flow of the cooling water in the first water tube assembly 40 and the engine heat dissipation water jacket 10, and the mechanical thermostat 110 is partially turned on, so as to distribute the flow of the cooling water in the second water tube assembly 50 and the external radiator 70. In the present embodiment, the power supply of the dual thermostat assembly 20 is used to keep the engine at the optimum working temperature (90-95 ℃).

In one embodiment, the engine control module 80 is further configured to send a specified operating voltage to the electronic thermostat 100 when the current water temperature is higher than a second preset temperature;

the electronic thermostat 100 is further configured to enter a fully-open state under the control of the specified operating voltage, and communicate the second port of the electronic thermostat 100 with the third port of the electronic thermostat 100. In the present embodiment, when the electronic thermostat 100 is in the fully-opened state, the first port of the electronic thermostat 100 is closed, the second port and the third port of the electronic thermostat 100 are opened, which is equivalent to opening the third port of the dual thermostat assembly 20, closing the first port of the dual thermostat assembly 20, and cutting off the cooling water in the first water pipe assembly 40.

The mechanical thermostat 110 is further configured to communicate the first port of the mechanical thermostat 110 with the third port of the mechanical thermostat 110 when the mechanical thermostat is in a fully open state, so that cooling water circulates among the mechanical water pump 30, the heat dissipation water jacket 10, the dual-thermostat assembly 20, the radiator 70, and the air heater 60;

wherein the mechanical thermostat 110 is in a fully-opened state when the current water temperature is higher than a second preset temperature. In this embodiment, when the mechanical thermostat 110 is in the fully open state, the second port of the mechanical thermostat 110 is closed, the first port and the third port of the mechanical thermostat 110 are opened, which is equivalent to opening the fourth port of the dual thermostat assembly 20, closing the second port of the dual thermostat assembly 20, and cutting off the cooling water in the second water pipe assembly 50.

It can be understood that, when the current water temperature is higher than the second preset temperature, the electronic thermostat 100 and the mechanical thermostat 110 are all in the fully open state, the second port and the third port of the electronic thermostat 100 are opened, the first port of the electronic thermostat 100 is closed, the first port and the third port of the mechanical thermostat 110 are opened, the second port of the mechanical thermostat 110 is closed, which is equivalent to the closing of the first port and the second port of the dual-thermostat assembly 20, the third port and the fourth port of the dual-thermostat assembly 20 are fully opened, so that the cooling water flows in the second circulation water path and the third circulation water path, at this time, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat dissipation water jacket 10, the dual-thermostat assembly 20, the heat sink 70, and a part of the cooling water flows through the mechanical water pump 30, the heat radiation water jacket 10, the double thermostat assembly 20 and the heating device 60 flow back to the mechanical water pump 30.

It should be noted that when the current water temperature is higher than the second preset temperature, the water flow in the engine cooling water jacket 10 circulates through the second circulation water path and the third circulation water path, taking the second preset temperature as 110 ℃ for example, by supplying power to the electronic thermostat 100, the electronic thermostat 100 and the mechanical thermostat 110 are all turned on, at this time, the first water pipe assembly 40 and the second water pipe assembly 50 are cut off, all the engine cooling water flows through the engine cooling water jacket 10 to the external radiator 70, and the heat dissipation power of the radiator 70 is maximized.

Further, the engine control module 80 is further configured to, when the current water temperature is within a third preset temperature range, search for first electric control information from pre-calibrated electric control information according to a first warm air requirement, and send a corresponding first working voltage to the electronic thermostat 100 according to the first electric control information, where a minimum limit value of the third preset temperature range is a maximum limit value of the second preset temperature range;

the electronic thermostat 100 is further configured to control the opening degrees of the first port of the electronic thermostat 100 and the second port of the electronic thermostat 100 under the control of the first operating voltage. In this embodiment, when the current water temperature is in the third predetermined temperature range and the electronic thermostat 100 is in the partially open state, the first port and the second port of the electronic thermostat 100 are half open, the third port of the electronic thermostat 100 is open, and the flow of the cooling water flowing to the first water tube assembly 40 and the heat dissipation water jacket 10 is distributed.

The mechanical thermostat 110 is further configured to communicate the first port of the mechanical thermostat 110 with the third port of the mechanical thermostat 110 when the mechanical thermostat is in a fully-opened state, so that cooling water circulates among the mechanical water pump 30, the first water pipe assembly 40, the dual-thermostat assembly 20, the heat dissipation water jacket 10, the air heater 60, and the radiator 70.

Wherein the mechanical thermostat 110 is in a fully-opened state when the current water temperature is in a third preset temperature range. In this embodiment, when the current water temperature is within the third preset temperature range, the mechanical thermostat 110 is in a fully open state, the second port of the mechanical thermostat 110 is closed, the first port and the third port of the mechanical thermostat 110 are opened, which is equivalent to opening the fourth port of the dual thermostat assembly 20 and closing the second port of the dual thermostat assembly 20, so as to cut off the cooling water in the second water pipe assembly 50.

It should be noted that, when the current water temperature is within the third preset temperature range, the electronic thermostat 100 is in a half-open state, the mechanical thermostat 110 is in a full-open state, the first port and the second port of the electronic thermostat 100 are half-open, the third port of the electronic thermostat 100 is open, the second port of the mechanical thermostat 110 is closed, the first port and the third port of the mechanical thermostat 110 are open, which is equivalent to half-open of the first port and the third port of the dual-thermostat assembly 20, the second port of the dual-thermostat assembly 20 is closed, the fourth port of the dual-thermostat assembly 20 is fully open, so that the cooling water flows in the first water pipe assembly 40, the second circulating water passage and the third circulating water passage, at this time, a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat sink 10, the dual-thermostat assembly 20 and the heat sink 70, and a part of the cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, The first water pipe component 40, the dual thermostat assembly 20 and the radiator 70 flow back to the mechanical water pump 30, and a part of cooling water flows back to the mechanical water pump 30 through the mechanical water pump 30, the heat radiation water jacket 10, the dual thermostat assembly 20 and the air heater 60.

For example, the electronic thermostat 100 is set to start to open at 60 ℃, fully open at 110 ℃ or higher, the mechanical thermostat 110 has the characteristics that the mechanical thermostat 110 starts to open at 85 ℃, fully open at 95 ℃ or higher, and the third preset temperature range is 95-110 ℃, when the current water temperature is 95-110 ℃, the electronic thermostat 100 is in a half-open state by supplying power to the electronic thermostat 100, and the mechanical thermostat 110 is in a fully open state, at this time, the flow distribution of the cooling water of the first water pipe assembly 40 and the engine cooling water jacket 10 is performed by controlling the power supply of the electronic thermostat 100, the second water pipe assembly 50 is cut off, and the engine cooling water flows through the first water pipe assembly 40 and the engine cooling water jacket 10 to the external radiator 70.

The dual thermostat assembly 20 of the present embodiment includes an electronic thermostat 100 and a mechanical thermostat 110; the first port of the electronic thermostat 100 is a first port of the dual-thermostat assembly 20, the second port of the electronic thermostat 100 is a third port of the dual-thermostat assembly 20, the third port of the electronic thermostat 100 is connected with the first port of the mechanical thermostat 110 through a pipeline, the pipeline is provided with a fifth port of the dual-thermostat assembly 20, the second port of the mechanical thermostat 110 is a second port of the dual-thermostat assembly 20, and the third port of the mechanical thermostat 110 is a fourth port of the dual-thermostat assembly 20; when the current water temperature is in a first preset temperature range, the engine control module 80 searches current electric control information from the pre-calibrated electric control information according to the current warm air demand, and sends corresponding current working voltage to the electronic thermostat 100 according to the current electric control information; the electronic thermostat 100 controls the opening degrees of a first port of the electronic thermostat 100 and a second port of the electronic thermostat 100 under the control of the current operating voltage; when the mechanical thermostat 110 is in a closed state, the first port of the mechanical thermostat 110 and the second port of the mechanical thermostat 110 are communicated, so that cooling water circulates in the mechanical water pump 30, the first water pipe assembly 40, the dual thermostat assembly 20, the second water pipe assembly 50, the heat dissipation water jacket 10 and the air heater 60; wherein, the mechanical thermostat 110 is in a closed state when the current water temperature is in a first preset temperature range. The trend of a circulating water path is changed through the electronic thermostat 100, the mechanical thermostat 110, the water pipe assembly and the whole system, fine control of engine cooling circulation is facilitated, the current temperature of the water temperature sensor 90 is monitored through the engine control module 80, when the current water temperature is within a first preset temperature range, the working voltage of the electronic thermostat 100 is controlled according to the current warm air requirement, the electronic thermostat 100 is controlled to distribute the flow of cooling water of the first water pipe assembly 40 and the engine cooling water jacket 10, water in the cooling water jacket 10 enters circulation, and the engine is facilitated to be at the optimal working temperature by controlling the power supply of the electronic thermostat 100 and the characteristics of the mechanical thermostat 110.

Referring to fig. 5, fig. 5 is a schematic flow chart of a first embodiment of the engine cooling method of the present invention.

As shown in fig. 5, the engine cooling method proposed by the embodiment of the invention is applied to the engine cooling system as described above, which includes: the system comprises a heat radiation water jacket, a double thermostat assembly, a mechanical water pump, a first water pipe component, a second water pipe component, a heater and a radiator;

the engine cooling method includes:

step S10: the water temperature sensor detects the current water temperature of the cooling water flowing into the double-thermostat assembly from the heat radiation water jacket;

step S20: the engine control module acquires the current water temperature, and stops sending working voltage to the double-thermostat assembly when the current water temperature is lower than a first preset temperature so as to enable the double-thermostat assembly to be in a closed state;

step S30: when the double thermostat assembly is in a closed state, the first port of the double thermostat assembly, the second port of the double thermostat assembly and the fifth port of the double thermostat assembly are communicated, so that cooling water circulates among the mechanical water pump, the first water pipe assembly, the double thermostat assembly, the second water pipe assembly and the air heater.

It should be understood that the above is only an example, and the technical solution of the present invention is not limited in any way, and in a specific application, a person skilled in the art may set the technical solution as needed, and the present invention is not limited thereto.

In the embodiment, the water temperature sensor detects the current water temperature of the cooling water flowing into the double-thermostat assembly from the heat dissipation water jacket; the engine control module acquires the current water temperature, and stops sending working voltage to the double-thermostat assembly when the current water temperature is lower than a first preset temperature so as to enable the double-thermostat assembly to be in a closed state; when the double thermostat assembly is in a closed state, the first port of the double thermostat assembly, the second port of the double thermostat assembly and the fifth port of the double thermostat assembly are communicated, so that cooling water circulates among the mechanical water pump, the first water pipe assembly, the double thermostat assembly, the second water pipe assembly and the air heater. Through designing two thermostats, water pipe subassembly and entire system, change the trend in circulation water route, be favorable to the control that becomes more meticulous of engine cooling cycle, when the engine starts, through the current temperature of engine control module monitoring water temperature sensor, when current temperature is less than first preset temperature, two thermostats assembly is in the closed condition, seal the third port of two thermostats, make the heat dissipation of engine only conduct to the heat dissipation water jacket, realize the quick warm-up of engine, reduce the emission of engine cold start stage, change the circulation route of cooling water through two thermostats in engine working process, be favorable to the engine to be in best operating temperature.

It should be noted that the above-described work flows are only exemplary, and do not limit the scope of the present invention, and in practical applications, a person skilled in the art may select some or all of them to achieve the purpose of the solution of the embodiment according to actual needs, and the present invention is not limited herein.

In addition, the technical details that are not elaborated in the present embodiment may be referred to an engine cooling system provided in any embodiment of the present invention, and are not described herein again.

In one embodiment, after the engine control module obtains the current water temperature, the method further comprises:

when the current water temperature is in a second preset temperature range, the engine control module searches target electric control information from pre-calibrated electric control information according to a target warm air requirement, and sends corresponding target working voltage to the double thermostat assembly according to the target electric control information, wherein the minimum limit value of the second preset temperature range is the maximum limit value of the first preset temperature range;

and the double-thermostat assembly controls the opening degrees of the first port of the double-thermostat assembly and the third port of the double-thermostat assembly and controls the opening degrees of the second port of the double-thermostat assembly and the fourth port of the double-thermostat assembly under the control of the target working voltage, so that cooling water circulates in the mechanical water pump, the first water pipe assembly, the double-thermostat assembly, the second water pipe assembly, the heat dissipation water jacket, the air warming device and the radiator.

the engine control module sends a specified working voltage to the double-thermostat assembly when the current water temperature is higher than a second preset temperature;

the double-thermostat assembly enters a full-open state under the control of the designated working voltage, and is closed, the first port of the double-thermostat assembly and the second port of the double-thermostat assembly are communicated, the third port of the double-thermostat assembly, the fourth port of the double-thermostat assembly and the fifth port of the double-thermostat assembly are communicated, and therefore cooling water circulates in the mechanical water pump, the heat dissipation water jacket, the double-thermostat assembly, the radiator and the warm air device.

In one embodiment, the dual thermostat assembly includes an electronic thermostat and a mechanical thermostat;

when the current water temperature is in a first preset temperature range, the engine control module searches current electric control information from pre-calibrated electric control information according to the current warm air demand, and sends corresponding current working voltage to the double-thermostat assembly according to the current electric control information, and the method comprises the following steps:

when the current water temperature is in a first preset temperature range, the engine control module searches current electric control information from pre-calibrated electric control information according to the current warm air requirement, and sends corresponding current working voltage to the electronic thermostat according to the current electric control information;

the dual thermostat assembly controls the opening degrees of the first port of the dual thermostat assembly and the third port of the dual thermostat assembly under the control of the current working voltage, so that cooling water circulates among the mechanical water pump, the first water pipe component, the dual thermostat assembly, the second water pipe component, the heat dissipation water jacket and the heater unit, and the dual thermostat assembly includes:

the electronic thermostat controls the opening degrees of a first port of the electronic thermostat and a second port of the electronic thermostat under the control of the current working voltage;

when the mechanical thermostat is in a closed state, the first port of the mechanical thermostat and the second port of the mechanical thermostat are communicated, so that cooling water circulates among the mechanical water pump, the first water pipe assembly, the double-thermostat assembly, the second water pipe assembly, the heat-dissipation water jacket and the air heater;

In one embodiment, when the current water temperature is within a second preset temperature range, the engine control module searches for target electric control information from pre-calibrated electric control information according to a target warm air requirement, and sends a corresponding target working voltage to the dual thermostat assembly according to the target electric control information, including:

when the current water temperature is in a second preset temperature range, the engine control module searches target electric control information from pre-calibrated electric control information according to a target warm air requirement and sends corresponding target working voltage to the electronic thermostat according to the target electric control information;

the dual thermostat assembly controls the opening degrees of the first port of the dual thermostat assembly and the third port of the dual thermostat assembly, and controls the opening degrees of the second port of the dual thermostat assembly and the fourth port of the dual thermostat assembly, under the control of the target working voltage, so that cooling water circulates among the mechanical water pump, the first water pipe component, the dual thermostat assembly, the second water pipe component, the heat dissipation water jacket, the heater unit, and the radiator, including:

the electronic thermostat controls the opening degrees of a first port of the electronic thermostat and a second port of the electronic thermostat under the control of the target working voltage;

the mechanical thermostat controls the opening degrees of a second port of the mechanical thermostat and a third port of the mechanical thermostat so as to enable cooling water to circulate in the mechanical water pump, the first water pipe component, the double-thermostat assembly, the second water pipe component, the heat dissipation water jacket, the warm air device and the radiator;

In one embodiment, the engine control module sends a specified operating voltage to the dual thermostat assembly when the current water temperature is higher than a second preset temperature, including:

the engine control module sends a specified working voltage to the electronic thermostat when the current water temperature is higher than a second preset temperature;

the dual thermostat assembly enters a fully-opened state under the control of the specified working voltage, closes the first port of the dual thermostat assembly and the second port of the dual thermostat assembly, and communicates the third port of the dual thermostat assembly, the fourth port of the dual thermostat assembly and the fifth port of the dual thermostat assembly, so that cooling water circulates among the mechanical water pump, the heat dissipation water jacket, the dual thermostat assembly, the radiator and the warm air device, including:

the electronic thermostat enters a full-open state under the control of the specified working voltage and is communicated with a second port of the electronic thermostat and a third port of the electronic thermostat;

when the mechanical thermostat is in a fully-opened state, the first port of the mechanical thermostat and the third port of the mechanical thermostat are communicated, so that cooling water circulates among the mechanical water pump, the heat radiation water jacket, the double-thermostat assembly, the radiator and the air heater;

Further, it is to be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other like elements in a process, method, article, or system that comprises the element.

The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.

Through the above description of the embodiments, those skilled in the art will clearly understand that the method of the above embodiments can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware, but in many cases, the former is a better implementation manner. Based on such understanding, the technical solution of the present invention or portions thereof that contribute to the prior art may be embodied in the form of a software product, where the computer software product is stored in a storage medium (e.g. Read Only Memory (ROM)/RAM, magnetic disk, optical disk), and includes several instructions for enabling a terminal device (e.g. a mobile phone, a computer, a server, or a network device) to execute the method according to the embodiments of the present invention.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.

Claims

1. An engine cooling system, characterized in that the engine cooling system comprises: the system comprises a heat radiation water jacket, a double thermostat assembly, a mechanical water pump, a first water pipe component, a second water pipe component, a heater and a radiator;

2. The engine cooling system of claim 1, further comprising: the engine control module is electrically connected with the double-thermostat assembly;

3. The engine cooling system of claim 2, wherein the engine control module is further configured to search for current electrical control information from pre-calibrated electrical control information according to a current warm air demand when the current water temperature is within a first preset temperature range, and send a corresponding current operating voltage to the dual thermostat assembly according to the current electrical control information;

4. The engine cooling system of claim 3, wherein the engine control module is further configured to search for target electric control information from pre-calibrated electric control information according to a target warm air requirement when the current water temperature is within a second preset temperature range, and send a corresponding target operating voltage to the dual thermostat assembly according to the target electric control information, wherein a minimum limit value of the second preset temperature range is a maximum limit value of the first preset temperature range;

5. The engine cooling system of claim 4, wherein the engine control module is further configured to send a specified operating voltage to the dual thermostat assembly when the current water temperature is greater than a second preset temperature;

6. The engine cooling system of claim 5, wherein the dual thermostat assembly includes an electronic thermostat and a mechanical thermostat;

7. The engine cooling system of claim 6, wherein the engine control module is further configured to search for target electrical control information from pre-calibrated electrical control information according to a target warm air requirement when the current water temperature is within a second preset temperature range, and send a corresponding target operating voltage to the electronic thermostat according to the target electrical control information;

8. The engine cooling system of claim 7, wherein the engine control module is further configured to send a specified operating voltage to the electronic thermostat when the current water temperature is greater than a second preset temperature;

9. An engine cooling method applied to an engine cooling system according to any one of claims 1 to 8, the engine cooling system comprising: the system comprises a heat radiation water jacket, a double thermostat assembly, a mechanical water pump, a first water pipe component, a second water pipe component, a heater and a radiator;

the engine cooling system further includes: the water temperature sensor is arranged on a pipeline connecting the heat dissipation water jacket and the third port of the double-thermostat assembly, and is connected with the engine control module, and the engine control module is in electric control connection with the double-thermostat assembly;

the engine cooling method includes:

10. The engine cooling method of claim 9, wherein after the engine control module obtains the current water temperature, the method further comprises: