CN212337429U

CN212337429U - Engine cooling system

Info

Publication number: CN212337429U
Application number: CN202021190938.1U
Authority: CN
Inventors: 刘益军; 覃星念; 冉景旭; 毛龙归
Original assignee: Guangxi Yuchai Machinery Co Ltd
Current assignee: Guangxi Yuchai Machinery Co Ltd
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2021-01-12
Anticipated expiration: 2030-06-23

Abstract

The utility model discloses an engine cooling system, which comprises a water pump, an engine body, a temperature adjusting device and a water tank, wherein the water pump, the engine body, the temperature adjusting device and the water tank are sequentially connected end to end in a waterway to form a cooling circulation; still including setting up radiator fan on the water tank side is still including setting up the temperature sensor of attemperator's water inlet department, attemperator's first delivery port with the water tank intercommunication constitutes the engine major cycle, attemperator's second delivery port with the water pump intercommunication constitutes the engine minor cycle, attemperator is wax formula electronic temperature regulator, is in including rubber tube, inductor shell and setting the rubber tube with paraffin between the inductor shell still includes that one end stretches into the push rod in the rubber tube, and the one end tip that the push rod stretches into in the rubber tube sets up electric heater unit, temperature sensor and radiator fan all with engine ECU connection of electric lines. The utility model discloses increaseed the temperature regulation scope, can adapt to the requirement of more harsh engine sudden change operating mode, especially heavy load operating mode.

Description

Engine cooling system

Technical Field

The utility model relates to the technical field of engines, especially an engine cooling system.

Background

With the increasing energy-saving requirement of the engine, the engine is required to maintain a proper working temperature. Conventional engine temperature control systems typically use a thermostat to control the temperature of the outgoing water.

The adjustable temperature range of the existing single temperature regulator is not wide enough, and the vehicle warming time is long especially in cold areas. Or the use of two identical thermostats, cannot adapt to the rapidly changing requirements of different loads, in particular to the requirements of a sharp increase in load. Such as:

the water air cooling system disclosed in chinese patent CN109184895A comprises an engine water pump, a low temperature water tank, an engine internal circulation system and an air water cooler, wherein the engine internal circulation system comprises an oil cooler, a body and a cylinder cover, a thermostat and an engine high temperature water tank, when the temperature of water entering the thermostat is higher than the opening temperature of the thermostat, the engine large circulation is opened, the engine small circulation is closed, water directly flows back to the high temperature water tank, enters the water pump after being cooled by a radiator in the high temperature water tank, when the temperature of water entering the thermostat is lower than the opening temperature of the thermostat, the engine small circulation is opened, the engine large circulation is closed, and water directly enters the water pump without passing through the high temperature water tank.

The thermostat of the engine disclosed in chinese patent CN206625887U comprises a thermostat base, a thermostat cover, and two thermostats. The thermostat base is provided with a cylinder cover water inlet cavity and a low-temperature water cavity, and two thermostat holes are formed in the thermostat base; the low-temperature water cavity is provided with two water outlet holes and a machine body water outlet. Two thermostats are installed respectively in the thermostat hole, and the thermostat has and closes the thermostat hole and open the first position of apopore and open the second position of thermostat hole and close the apopore.

And cannot adapt to the rapidly changing requirements of different loads. The traditional engine water pump can only change along with the change of the rotating speed of the engine and can not change along with the change of load and water temperature, and the adjusting range of the cooling capacity of the cooling system is limited.

Disclosure of Invention

The utility model aims at solving the problem of above-mentioned prior art, the design of the wax formula thermoregulator of taking heating device is proposed, adjusts engine circulation flow, has increaseed the temperature regulation scope, can adapt to the requirement that more harsh engine sudden change operating mode, especially engine load sharply increased.

The technical scheme of the invention is as follows:

an engine cooling system comprises a water pump, an engine body, a temperature adjusting device and a high-temperature water tank, wherein water paths are sequentially connected end to form a cooling circulation; still including setting up radiator fan on the water tank side is still including setting up the temperature sensor of attemperator's water inlet department, attemperator's first delivery port with the water tank intercommunication constitutes the engine major cycle, attemperator's second delivery port with the water pump intercommunication constitutes the engine minor cycle, attemperator is the wax formula thermosistor who takes heating device, is in including rubber tube, inductor shell and setting the rubber tube with paraffin between the inductor shell still includes that one end stretches into the push rod in the rubber tube, and the one end tip that the push rod stretches into in the rubber tube sets up electric heater unit, temperature sensor and radiator fan all with engine ECU connection of electric lines.

Preferably, the water temperature sensor is connected with a water tank through a wire, and the water temperature sensor is connected with a water tank through a wire.

Preferably, the electric heating device is a heating wire.

The utility model discloses increase electric heater unit heating paraffin and adjust the opening temperature on traditional wax formula temperature regulation basis, send the instruction through ECU, change PWM duty cycle and realize nimble opening temperature, the opening speed of adjusting the engine. The principle is that the starting temperature is flexibly adjusted according to the load condition of an engine, and when the load is small, the engine is started according to the set starting temperature of a wax type temperature regulator; when the load meter is large, the load meter needs to be electrified for heating and is opened in advance. The device can meet the requirement of quickly increasing the temperature of the outlet water during starting and prevent overheating.

The initial starting temperature is increased, so that the working temperature of the engine is increased when the engine is in partial load, the heat dissipation of the cooling liquid of the engine is reduced, the cooling strategy of the fan is optimized, the working time of the fan is reduced, the oil consumption is reduced, and the oil saving effect is 0.5-1.5%. The control mode of controlling the thermostat to start through the ECU is more flexible, and can meet the requirements of energy conservation, consumption reduction, quick vehicle warming and quick loading.

The utility model discloses a take heating device's wax formula thermoregulator technique changes the thermoregulator, to the engine few, and the cost change is also few, just can satisfy the demand that improves engine water temperature and carry out the consumption reduction that economizes on fuel, can not produce other troubles from this. The flow and temperature of the engine can be adjusted simultaneously, and the effects of energy conservation and consumption reduction are more obvious.

Drawings

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

FIG. 2 is a schematic structural view of the temperature adjusting device of the present invention;

FIG. 3 is a structural diagram of a wax type thermostat with a heating device according to the present invention;

in the figure, 1-water pump, 2-engine body, 3-temperature regulating device, 301-wax type temperature regulator with heating device, 303-first water outlet, 304-second water outlet, 4-water tank, 5-temperature sensor, 6-engine ECU, 7-cooling fan, 8-display, 309, rubber tube, 302, inductor shell, 305, paraffin, 306, push rod, 307, lead, 308 and heating device.

Detailed Description

In order to explain the technical content, the objects and the effects of the present invention in detail, the following description is made with reference to the accompanying drawings in combination with the embodiments.

As shown in fig. 1-2, an engine cooling system comprises a water pump 1, an engine body 2, a temperature adjusting device 3 and a water tank 4, wherein water paths are sequentially connected end to form a cooling cycle; still including setting up radiator fan 7 on the water tank side, still including setting up temperature sensor 5 at attemperator 3's income water inlet department, attemperator 3's first delivery port 303 with water tank 4 intercommunication constitutes the engine major cycle, attemperator 3's second delivery port 304 with water pump 1 intercommunication constitutes the engine minor cycle, as figure 3, attemperator 3 is the wax formula thermosistor 301 who takes heating device, includes rubber tube 303, inductor shell 304 and sets up rubber tube 309 with paraffin 305 between the inductor shell 302, still includes the push rod 306 that one end stretches into in the rubber tube 309, and the one end tip that the push rod stretches into in the rubber tube 309 sets up electric heater unit 308, temperature sensor 5 and radiator fan 7 all with engine ECU6 connection of electric lines.

In the embodiment, the engine cooling system is applied to an inline six-cylinder diesel engine, the electric heating device 308, the temperature sensor 5 and the radiator fan 7 are all in electric wire connection with the engine ECU6, wherein the electric heating device 308 passes through a cavity in the middle of the push rod 306 through a lead 307 and is in electric wire connection with the engine ECU 6; the engine ECU6 receives the signal from the temperature sensor 5, processes the generated command, and controls the radiator fan 7 and the electric heater 308 to be turned on and off to keep the engine water temperature constant.

A control strategy of engine ECU6, comprising the steps of:

s1: after the engine is started, the temperature-saving device 3 is not started at the moment, and the engine is cooled by adopting a small circulation;

s2: when the water temperature rises to 75 ℃, the wax type temperature regulator 301 with the heating device is started, the heating device 308 is started, the wax type temperature regulator 301 with the heating device is driven to be started for the first time, and the engine major cycle is started;

s3, when the water temperature reaches 86 ℃, the heating device 308 is closed, and as the load of the engine continuously increases, the oil injection of the oil supply system of the engine is continuously carried out, so that the water temperature continuously rises to 98 ℃, and the wax type temperature regulator 301 with the heating device is fully opened;

s4, the engine ECU6 collects signals of the temperature sensor 5, when the water temperature reaches 98 ℃, the engine ECU6 sends out instructions to control the radiating fan 7 to start working, and the water temperature is kept stable in a balance state; if the water temperature still continues to rise above 105 ℃, entering S5;

s5: and the engine ECU6 sends out an instruction after receiving the signal of the temperature sensor 5, controls an engine oil supply system to stop oil injection, and returns to S4 when the water temperature is reduced to be lower than 102 ℃.

In this embodiment, if the temperature control device 3 is a conventional temperature controller, i.e., a wax type temperature controller, the opening temperature is 78 ℃ at the initial opening and 90 ℃ at the full opening. The wax type thermostat 301 with the heating device is initially opened at 86 ℃ and is fully opened at 98 ℃. By using the wax type temperature regulator with the heating device, the initial opening temperature can be 75-86 ℃, the temperature regulation range is enlarged, and the wax type temperature regulator can meet the more severe working condition requirements of the sudden change engine.

Preferably, the water heater further comprises a display 8 connected with the temperature sensor through a wire, and the display 8 is used for displaying the water temperature of the engine and acquiring the working state of the engine in real time. It is also possible to use the ECM for engine water temperature display.

In one preferred embodiment of the present invention, the heating device is an electric heating wire, which is easy to select materials and low in cost.

Although the invention has been described in detail and with reference to specific embodiments thereof, it will be apparent to one skilled in the art that modifications and improvements can be made thereto. Therefore, such modifications and improvements are intended to be within the scope of the invention as claimed.

Claims

1. An engine cooling system, characterized in that: the engine comprises a water pump, an engine body, a temperature adjusting device and a water tank, wherein water paths are sequentially connected end to form a cooling circulation; still including setting up radiator fan on the water tank side is still including setting up the temperature sensor of attemperator's water inlet department, attemperator's first delivery port with the water tank intercommunication constitutes the engine major cycle, attemperator's second delivery port with the water pump intercommunication constitutes the engine minor cycle, attemperator is the wax formula thermosistor who takes heating device, is in including rubber tube, inductor shell and setting the rubber tube with paraffin between the inductor shell still includes that one end stretches into the push rod in the rubber tube, and the one end tip that the push rod stretches into in the rubber tube sets up electric heater unit, temperature sensor and radiator fan all with engine ECU connection of electric lines.

2. An engine cooling system according to claim 1, characterized in that: also included is a display or ECM in wired connection with the temperature sensor.

3. An engine cooling system according to any one of claims 1 to 2, characterized in that: the electric heating device is an electric heating wire.