Constant-temperature control system for water inlet of engine

Abstract

The utility model discloses an engine water inlet constant temperature control system, relates to the engine control technology, and solves the technical problem that the heating cost is easily increased in the existing engine testing mode. The device comprises a first water temperature exchanger, a second water temperature exchanger, a first control valve and a second control valve, a water inlet of an engine cooling system is connected with a first exchange port of the first water temperature exchanger, and a water outlet of the engine cooling system is connected with a first exchange port of the second water temperature exchanger through the first control valve. A second exchange port of the second water temperature exchanger is connected with an external water pool through a pipeline, and the connection position of a water outlet of the engine cooling system and the first control valve is connected with the second exchange port of the second water temperature exchanger and the external water pool through a second control valve at the same time. The device does not need a heating system, is simple in structure and operation, and can reduce the heating cost.

Description

Technical Field

[0001] The utility model relates to an engine control technology, and more specifically, to an engine water inlet constant temperature control system. Background Art

[0002] When the engine is running, the temperature of the gas in the cylinder can reach as high as 2000℃ to 2500℃. These high-temperature components are in contact with the high-temperature combustible mixture, which will affect the normal fit clearance due to thermal expansion, and may cause the moving parts to get stuck or damaged. In addition, high temperature will also reduce the mechanical strength of engine parts, reduce the viscosity of lubricating oil, and deteriorate the lubrication effect, thereby aggravating the friction and wear of parts. Therefore, the role of the cooling system is to dissipate this heat into the air in time to prevent the engine from overheating. At the same time, the cooling system also helps the engine to heat up quickly and maintain a constant temperature, ensuring that the engine runs at the optimal operating temperature, thereby improving its power output, reducing fuel waste, and extending the service life of the engine.

[0003] During bench engine testing, the water inlet temperature must be kept constant at a certain point according to different requirements. However, the temperature of the water supplied from the pool to the engine cannot be adjusted, and the water inlet temperature will fluctuate from 18°C ​​to 42°C due to weather changes.

[0004] Existing test engines mainly use a temperature water temperature exchanger to achieve constant temperature control of the engine. The injected chilled water and the engine's cooling water exchange temperatures. However, the cooling water of existing test engines is directly discharged or heated by a heater to keep the engine's operating temperature constant, which easily leads to an increase in heating costs. Utility Model Content

[0005] The technical problem to be solved by the utility model is to provide an engine water inlet constant temperature control system in view of the deficiencies in the prior art, so as to solve the technical problem that the existing engine testing method easily causes an increase in heating costs.

[0006] The utility model discloses an engine water inlet constant temperature control system, which comprises a first water temperature exchanger, a second water temperature exchanger, a first control valve and a second control valve; the water inlet of the engine cooling system is connected to the first exchange port of the first water temperature exchanger, the water outlet of the engine cooling system is connected to the first exchange port of the second water temperature exchanger through the first control valve, the connection between the water outlet of the engine cooling system and the first control valve is connected to the second exchange port of the second water temperature exchanger through the second control valve, the external water pool is connected to the third exchange port of the second water temperature exchanger through a pipeline, and the fourth exchange port of the second water temperature exchanger is connected to the second exchange port of the first water temperature exchanger through a pipeline.

[0007] As a further improvement, a booster pump is installed in the pipeline between the external water pool and the third exchange port of the second water temperature exchanger.

[0008] Furthermore, an auxiliary channel is provided on one side of the first water temperature exchanger.

[0009] Furthermore, the auxiliary channel includes a cooling water outlet and a cooling water inlet, the third exchange port of the first water temperature exchanger is the cooling water outlet, and the fourth exchange port of the first water temperature exchanger is the cooling water inlet.

[0010] Furthermore, a temperature sensor is installed at the water inlet of the engine cooling system, and the temperature sensor is electrically connected to a controller.

[0011] Furthermore, a third control valve is installed at the fourth exchange port of the first water temperature exchanger, and the third control valve is electrically connected to the controller.

[0012] Beneficial Effects

[0013] The advantages of the utility model are:

[0014] The utility model is provided with a controller, a first water temperature exchanger, a second water temperature exchanger, a first control valve and a second control valve. The utility model adjusts the outlet water temperature of the second water temperature exchanger through the first control valve and the second control valve, thereby adjusting the water temperature of the water inlet of the engine cooling system, and finally achieving constant temperature control of the water temperature of the water inlet of the engine cooling system. The utility model does not need to pass through a heating system, has a simple structure, is simple to operate, and can reduce heating costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0016] Among them: A-engine cooling system, B-external water tank, K1-first control valve, K2-second control valve, P1-first water temperature exchanger, P2-second water temperature exchanger. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the embodiments, but does not constitute any limitation to the utility model. Any limited modifications made by anyone within the scope of the claims of the utility model are still within the scope of the claims of the utility model.

[0018] See also Figure 1The utility model discloses an engine water inlet constant temperature control system, which comprises a first water temperature exchanger P1, a second water temperature exchanger P2, a first control valve K1 and a second control valve K2. The water inlet of the engine cooling system A is connected to the first exchange port of the first water temperature exchanger P1, the water outlet of the engine cooling system A is connected to the first exchange port of the second water temperature exchanger P2 through the first control valve K1, the connection between the water outlet of the engine cooling system A and the first control valve K1 is simultaneously connected to the second exchange port of the second water temperature exchanger P2 and an external water pool B through the second control valve K2, the external water pool B is connected to the third exchange port of the second water temperature exchanger P2 through a pipeline, and the fourth exchange port of the second water temperature exchanger P2 is connected to the second exchange port of the first water temperature exchanger P1 through a pipeline.

[0019] A booster pump is installed in the pipeline between the external water pool B and the third exchange port of the second water temperature exchanger P2, which is used to pump water from the external water pool B into the second water temperature exchanger P2.

[0020] An auxiliary channel is provided on one side of the first water temperature exchanger P1, and the auxiliary channel is used to add cooling water.

[0021] The auxiliary channel includes a cooling water outlet and a cooling water inlet. The third exchange port of the first water temperature exchanger P1 is the cooling water outlet, and the fourth exchange port of the first water temperature exchanger P1 is the cooling water inlet.

[0022] A temperature sensor is installed at the water inlet of the engine cooling system A, and the temperature sensor is electrically connected to the controller. The temperature sensor is used to collect the water temperature of the water inlet of the engine cooling system A.

[0023] The fourth exchange port of the first water temperature exchanger P1 is equipped with a third control valve, which is electrically connected to the controller and is used to control the inlet and outlet of cooling water.

[0024] The working principle of the utility model is:

[0025] When the water temperature value collected by the temperature sensor is higher than the set temperature value, the first control valve K1 is closed and the second control valve K2 is opened. The water heated by the engine itself directly enters the external water pool B for cooling. The water in the external water pool B enters the third exchange port of the second water temperature exchanger P2 through the boost pump. The water entering the third exchange port of the second water temperature exchanger P2 is discharged from the fourth exchange port of the second water temperature exchanger P2. At this time, the third control valve is opened, and chilled water is added to the fourth exchange port of the first water temperature exchanger P1. The chilled water further cools the water entering the second exchange port of the first water temperature exchanger P1. The water in the external water pool B goes from the second exchange port of the first water temperature exchanger P1 to the first exchange port of the first water temperature exchanger P1. The water in the external water pool B is cooled down through the temperature exchange with the chilled water, and finally enters the engine cooling system A from the first exchange port of the first water temperature exchanger P1 to cool the engine.

[0026] When the water temperature value collected by the temperature sensor is lower than the set temperature value, the first control valve K1 is opened and the second control valve K2 is closed. The water heated by the engine itself enters the first exchange port of the second water temperature exchanger P2 from the water outlet. The water entering the first exchange port of the second water temperature exchanger P2 is discharged from the second exchange port of the second water temperature exchanger P2, and then enters the external water pool B from the second exchange port of the second water temperature exchanger P2. The water in the external water pool B enters the third exchange port of the second water temperature exchanger P2 through the booster pump and enters the third exchange port of the second water temperature exchanger P2. The water at the exchange port is discharged from the fourth exchange port of the second water temperature exchanger P2, and the water discharged from the fourth exchange port of the second water temperature exchanger P2 and the water entering the first exchange port of the second water temperature exchanger P2 and heated by the engine's own operation undergo temperature exchange, thereby achieving water heating. At this time, the third control valve is closed, and no chilled water is added to the first water temperature exchanger P1. The heated water flows from the second exchange port of the first water temperature exchanger P1 to the third exchange port of the first water temperature exchanger P1. The heated water does not undergo temperature exchange and finally enters the engine cooling system A, thereby achieving engine heating.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. An engine water inlet constant temperature control system, characterized in that: It comprises a first water temperature exchanger (P1), a second water temperature exchanger (P2), a first control valve (K1) and a second control valve (K2); a water inlet of an engine cooling system (A) is connected to a first exchange port of the first water temperature exchanger (P1); a water outlet of the engine cooling system (A) is connected to a first exchange port of the second water temperature exchanger (P2) through the first control valve (K1); a connection point between the water outlet of the engine cooling system (A) and the first control valve (K1) is simultaneously connected to a second exchange port of the second water temperature exchanger (P2) and an external water pool (B) through the second control valve (K2); the external water pool (B) is connected to a third exchange port of the second water temperature exchanger (P2) through a pipeline; and a fourth exchange port of the second water temperature exchanger (P2) is connected to a second exchange port of the first water temperature exchanger (P1) through a pipeline.

2. The engine water inlet constant temperature control system according to claim 1, characterized in that: A booster pump is installed in the pipeline between the external water pool (B) and the third exchange port of the second water temperature exchanger (P2).

3. The engine water inlet constant temperature control system according to claim 1, characterized in that: An auxiliary channel is provided on one side of the first water temperature exchanger (P1).

4. The engine water inlet constant temperature control system according to claim 3, characterized in that: The auxiliary channel comprises a cooling water outlet and a cooling water inlet, the third exchange port of the first water temperature exchanger (P1) is the cooling water outlet, and the fourth exchange port of the first water temperature exchanger (P1) is the cooling water inlet.

5. The engine water inlet constant temperature control system according to claim 1, characterized in that: A temperature sensor is installed at the water inlet of the engine cooling system (A), and the temperature sensor is electrically connected to a controller.

6. The engine water inlet constant temperature control system according to claim 5, characterized in that: The fourth exchange port of the first water temperature exchanger (P1) is installed with a third control valve, and the third control valve is electrically connected to the controller.

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