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Control method and device for electronic control piston cooling nozzle, vehicle and storage medium

A technology of a piston cooling nozzle and a control method, which is applied in the field of vehicles, can solve the problems of reduced control accuracy of an electronically controlled piston cooling nozzle and inability to accurately evaluate the piston temperature, and achieves the effect of ensuring the control accuracy

Active Publication Date: 2022-07-29
WEICHAI POWER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a control method, device, vehicle and storage medium for an electronically controlled piston cooling nozzle, so as to solve the problem that the temperature of the piston cannot be accurately evaluated only by the temperature of the oil in the main oil passage in the prior art, which will cause the electronic control The problem of reduced control accuracy of piston cooling nozzles

Method used

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  • Control method and device for electronic control piston cooling nozzle, vehicle and storage medium
  • Control method and device for electronic control piston cooling nozzle, vehicle and storage medium
  • Control method and device for electronic control piston cooling nozzle, vehicle and storage medium

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Experimental program
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Effect test

Embodiment 1

[0084] The existing piston cooling nozzle control method comprehensively considers the operating conditions of the engine, the real-time engine speed, the engine load, the oil pressure of the main oil passage, the real-time value of the oil temperature of the main oil passage, and the pre-calibrated data through the bench test. Perform different control steps after the meter, the engine electronic control unit ECU controls the variable oil pump to change its displacement to reach the corresponding target oil pressure of the main oil passage; and controls the pressure limiting valve to achieve the corresponding opening based on the target oil pressure of the main oil passage Piston cooling jets produce different flow rates. However, the influence of lubricating oil on the piston is not only reflected in the temperature, but also the convective heat transfer coefficient of the lubricating oil cooling oil cavity will affect the actual temperature of the piston, so this method is n...

Embodiment 2

[0138] This embodiment provides a control device for an electronically controlled piston cooling nozzle, and the control device for an electronically controlled piston cooling nozzle is used to implement the above-mentioned control method for an electronically controlled piston cooling nozzle. Specifically, as figure 2 As shown, the control device for the electronically controlled piston cooling nozzle includes a parameter acquisition module 2001 , a first determination module 2002 , a second determination module 2003 , a target temperature acquisition unit 2004 , a comparison unit 2005 and a first execution unit 2006 .

[0139] The parameter acquisition module 2001 is used to acquire engine operating parameters, including engine speed, engine load rate, lubricating oil flow, wind speed flowing through the radiator, coolant flow and atmospheric temperature. The first determination module 2002 is configured to determine the temperature of the main oil passage and the convectiv...

Embodiment 3

[0143] This embodiment provides a vehicle such as image 3As shown, the vehicle includes an engine 3001, an electronically controlled piston cooling nozzle 3002, a driving controller 3003, a rotational speed sensor 3004, a torque sensor 3005, a temperature sensor 3006, a lubricating oil flow sensor 3007, a fan rotational speed sensor 3008, a coolant flow sensor 3009 and memory 3010. Among them, the engine 3001, the electronically controlled piston cooling nozzle 3002, the driving controller 3003, the rotational speed sensor 3004, the torque sensor 3005, the temperature sensor 3006, the lubricating oil flow sensor 3007, the fan rotational speed sensor 3008, the coolant flow sensor 3009 and the memory 3010 pass through the bus connect. The rotational speed sensor 3004 is used to detect the engine rotational speed of the engine and send the detected engine rotational speed to the driving controller 3003; the torque sensor 3005 is used to detect the torque of the engine and send ...

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Abstract

The invention relates to the technical field of vehicles, and particularly discloses a control method and device for an electric control piston cooling nozzle, a vehicle and a storage medium, and the control method for the electric control piston cooling nozzle comprises the steps that operation parameters of an engine are obtained; determining the temperature of a main oil duct and the convective heat transfer coefficient of a lubricating oil cooling oil cavity based on the operation parameters of the engine; the working temperature T1 of the piston is determined based on the temperature of the main oil duct and the convective heat transfer coefficient of the lubricating oil cooling oil cavity; the target temperature T0 of the piston is obtained; t1 and T0 are compared, when T1-T0 is smaller than or equal to m, the opening degree of a cooling nozzle of the electric control piston is kept unchanged, when the working temperature of the piston is determined, the temperature of a main oil way is considered, meanwhile, the convective heat transfer coefficient of a lubricating oil cavity is also considered, it can be guaranteed that the determined working temperature of the piston has high precision, and the working temperature of the piston can be accurately determined. Therefore, the control precision of the electric control piston cooling nozzle is ensured, and the accurate control of the flow of the lubricating oil is realized.

Description

technical field [0001] The present invention relates to the technical field of vehicles, and in particular, to a control method, device, vehicle and storage medium for an electronically controlled piston cooling nozzle. Background technique [0002] Combustion in the engine cylinder releases a lot of heat, which is transferred to the piston, cylinder liner and cylinder head. In order to ensure that the piston works within the normal temperature range, the piston needs to be cooled by lubricating oil, and the cylinder liner and cylinder head are mainly cooled by coolant. However, the temperature of the piston cannot be directly measured, and is usually evaluated by the oil temperature of the main oil passage in the prior art. [0003] For example, the commercial vehicle piston cooling nozzle control method disclosed in the previous patent with the application number of CN201910180471.8, by comprehensively considering the operating conditions of the engine, the engine speed o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01P7/16F01P3/08
CPCF01P7/16F01P3/08Y02T10/12
Inventor 马伟杜祥宁李振国
Owner WEICHAI POWER CO LTD
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