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CN-122014463-A - Cooler water supply device, control method and engine

CN122014463ACN 122014463 ACN122014463 ACN 122014463ACN-122014463-A

Abstract

The application relates to a water supply device of a cooler, a control method and an engine, comprising a shell, a flow path switching mechanism and a control device, wherein the shell is provided with a water inlet and a water outlet, and a first interface and a second interface which are used for connecting the cooler, the flow path switching mechanism is arranged in the shell and is used for switching a water flow path to enable water flow to have at least three flow states, namely a first state, water flow flows from the water inlet to the water outlet, a second state, water flow flows from the water inlet to the first interface so as to enable the water flow direction to be the same as the medium flow direction in the cooler, and a third state, water flow flows from the water inlet to the second interface so as to enable the water flow direction to be opposite to the medium flow direction in the cooler. According to the application, through the integrated shell structure and the flow path switching mechanism, the flexible switching of three working modes of cooling water bypass, forward flow and reverse flow is realized, so that the cooler can be dynamically optimized among the warming-up speed, the heat exchange efficiency and the boiling inhibition according to the working condition requirement of the engine, and the fuel economy, the emission performance and the system reliability are considered.

Inventors

  • AN TAO
  • LEI GANGQIN

Assignees

  • 东风商用车有限公司

Dates

Publication Date
20260512
Application Date
20260327

Claims (10)

  1. 1. A water supply device of a cooler, characterized by comprising the following steps: The cooling device comprises a shell (1), wherein a water inlet (2) and a water outlet (3) are arranged on the shell (1), and a first interface (4) and a second interface (5) which are used for connecting a cooler are arranged on the shell; The flow path switching mechanism is arranged in the shell (1) and is used for switching the flow paths so that the water flow has at least three flow states: In a first state, water flows from the water inlet (2) to the water outlet (3); a second state in which water flows from the water inlet (2) to the first port (4) so that the water flow direction is the same as the medium flow direction in the cooler; in a third state, water flows from the water inlet (2) to the second port (5) so that the water flow direction is opposite to the medium flow direction in the cooler.
  2. 2. The chiller water supply of claim 1 wherein, The water inlet (2) is arranged between the first interface (4) and the second interface (5); A first branch runner (6) is arranged between the water inlet (2) and the first interface (4); a second branch runner (7) is arranged between the water inlet (2) and the second interface (5); The first branch flow passage (6) and the second branch flow passage (7) are converged to form the water outlet (3); the flow path switching mechanism includes: The first switching mechanism (8) is arranged at the junction of the water inlet (2), the first interface (4) and the first branch flow passage (6); The second switching mechanism (9) is arranged at the junction of the water inlet (2), the second interface (5) and the second branch flow channel (7).
  3. 3. The chiller water supply of claim 2 wherein, The first state is that the water inlet (2) is communicated with the first branch flow passage (6) and the second branch flow passage (7), and the first interface (4) and the second interface (5) are closed; the second state is that the water inlet (2) is communicated with the first interface (4), and the water inlet (2) is closed with the first branch flow passage (6), the second branch flow passage (7) and the second interface (5); the third state is that the water inlet (2) is communicated with the second interface (5), and the water inlet (2) is closed with the first branch flow passage (6), the second branch flow passage (7) and the first interface (4).
  4. 4. The chiller water supply of claim 1 wherein, The control unit is in communication connection with the flow path switching mechanism and is used for controlling the flow path switching mechanism to switch among the three flow states according to engine operation parameters.
  5. 5. A control method of a chiller water supply apparatus as claimed in any one of claims 1 to 4, comprising the steps of: acquiring an engine operation parameter; and controlling the flow path switching mechanism to switch among the three flow states according to the engine operation parameters.
  6. 6. The control method of a chiller water supply according to claim 5 wherein, The engine operating parameters include engine water temperature; And if the temperature of the water of the engine is lower than a preset temperature threshold value, controlling the flow path switching mechanism to the first state.
  7. 7. The control method of a chiller water supply according to claim 6 wherein, The engine operating parameters include engine water temperature and EGR rate; and if the water temperature of the engine is greater than or equal to a preset temperature threshold and the EGR rate is greater than a preset EGR rate threshold, controlling the flow path switching mechanism to the second state.
  8. 8. The control method of a chiller water supply according to claim 6 wherein, The engine operating parameters include engine water temperature and EGR rate; And if the water temperature of the engine is greater than or equal to a preset temperature threshold and the EGR rate is less than or equal to a preset EGR rate threshold, controlling the flow path switching mechanism to the third state.
  9. 9. An engine, characterized by comprising a cooler water supply device according to any one of claims 1 to 4, said water inlet (2) being connected to the engine block, said water outlet (3) being adapted to be connected to a water tank, said first interface (4) and said second interface (5) being adapted to be connected to two water inlets of the cooler, respectively.
  10. 10. A vehicle comprising an engine according to claim 9.

Description

Cooler water supply device, control method and engine Technical Field The application relates to the technical field of engines, in particular to a cooler water supply device, a control method and an engine. Background To reduce engine nitrogen oxide emissions, exhaust Gas Recirculation (EGR) techniques are widely used. This technique directs a portion of the exhaust back into the intake manifold, where it is mixed with fresh air and then enters the cylinders to participate in combustion. Since the exhaust temperature is as high as hundreds or even nearly thousands of degrees celsius, the high temperature EGR gas needs to be cooled by an EGR cooler before entering the cylinder to prevent knocking and improve the charge efficiency. An EGR cooler is a heat exchanger whose cooling effect directly affects engine performance and emissions. In the prior art, in order to ensure that the cooling liquid absorbs heat sufficiently in the EGR cooler and to prevent local boiling, a "forward flow" arrangement is generally used in which the cooling water flow direction coincides with the air flow direction. Although the arrangement reduces the boiling risk to a certain extent, the arrangement cannot be flexibly adjusted according to different working conditions of the engine, so that cooling water still flows through the EGR cooler under partial working conditions (such as when a rapid heat engine is needed), the power consumption of the water pump is increased, the engine warming-up time is prolonged, and under other working conditions (such as when a high EGR rate is achieved), the heat exchange efficiency cannot be further improved or the boiling cannot be effectively restrained by changing the water flow direction. Because the prior art only provides a fixed heat exchange mode, the cooling efficiency, the water pump power consumption and the boiling area are difficult to be simultaneously and optimally considered because flexible adjustment cannot be performed according to the change of the working condition of the engine. Disclosure of Invention The embodiment of the application provides a cooler water supply device, a control method and an engine, which are used for solving the problems that in the related art, the cooling efficiency, the water pump power consumption and the boiling area are difficult to be simultaneously and optimally adjusted because a cooler cannot be flexibly adjusted according to the change of the working condition of the engine. In a first aspect, there is provided a chiller water supply comprising: The shell is provided with a water inlet and a water outlet, and a first interface and a second interface which are used for connecting the cooler; The flow path switching mechanism is arranged in the shell and is used for switching the flow path so that the water flow has at least three flow states: in a first state, water flows from the water inlet to the water outlet; In a second state, water flows from the water inlet to the first interface so that the water flow direction is the same as the medium flow direction in the cooler; and in a third state, water flows from the water inlet to the second interface so that the water flow direction is opposite to the medium flow direction in the cooler. In some embodiments, the water inlet is disposed between the first interface and the second interface; A first branch runner is arranged between the water inlet and the first interface; a second branch runner is arranged between the water inlet and the second interface; the first branch flow passage and the second branch flow passage are converged to form the water outlet; the flow path switching mechanism includes: the first switching mechanism is arranged at the junction of the water inlet, the first interface and the first branch flow passage; The second switching mechanism is arranged at the junction of the water inlet, the second interface and the second branch flow passage. In some embodiments, the first state is that the water inlet is communicated with the first branch flow passage and the second branch flow passage, and the first interface and the second interface are closed; the second state is that the water inlet is communicated with the first interface, and the water inlet is closed with the first branch flow passage, the second branch flow passage and the second interface; The third state is that the water inlet is communicated with the second interface, and the water inlet is closed with the first branch flow passage, the second branch flow passage and the first interface. In some embodiments, the engine further comprises a control unit communicatively coupled to the flow path switching mechanism for controlling the flow path switching mechanism to switch between the three flow states in accordance with engine operating parameters. In a second aspect, there is provided a control method of a chiller water supply apparatus, comprising the steps of: acquiring an engine operation parameter; and