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Diagnostic method for piston cooling nozzle valve, diagnostic device, control device, motor vehicle

A technology of piston cooling nozzle and diagnostic method, which is applied in the direction of pressure lubrication safety device, liquid cooling, safety device, etc., and can solve problems such as failure, wrong diagnosis, inaccurate results, etc.

Pending Publication Date: 2022-01-18
VOLKSWAGEN AG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The risk is that a fault is misdiagnosed (false exception; English: false failure) or misdiagnosed as a good result (false normal; English: false pass)
Also, only passive diagnostics are set here, which may provide inaccurate results

Method used

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  • Diagnostic method for piston cooling nozzle valve, diagnostic device, control device, motor vehicle
  • Diagnostic method for piston cooling nozzle valve, diagnostic device, control device, motor vehicle
  • Diagnostic method for piston cooling nozzle valve, diagnostic device, control device, motor vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0132] exist figure 1 An exemplary embodiment of an oil hydraulic system 1 according to the invention is schematically shown in .

[0133] The oil hydraulic system 1 comprises an oil sump 2 and a variably adjustable oil pump 3 . A variably adjustable oil pump 3 pumps oil at a preset pressure from an oil sump 2 into an oil filter 4, after which an oil cooler 5 is provided.

[0134] The hydraulic system 1 also includes an oil passage 6 having a main oil passage 7 and a bypass oil passage 8 . Arranged in the main oil gallery 7 is an oil pressure sensor 9 which is provided for determining the oil pressure in the main oil gallery. Arranged in the bypass oil passage 8 is a piston cooling nozzle valve 10 which, as described here, is designed as an electronic regulating valve.

[0135] The known hydraulic system additionally has a line 11 and a proportional valve 12 with which the functionality of the piston cooling nozzle valve 10 can be checked. However, since the piston cooling...

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PUM

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Abstract

A diagnostic method for an oil piston cooling jet valve of an oil pressure system of an internal combustion engine of a motor vehicle, including: controlling (21;58) the OPCJ valve (10;43) for detecting oil pressure diagnostic data if multiple enabling conditions have been met, the multiple enabling conditions including: presence of a stationary operation of the internal combustion engine; presence of a predetermined operating range; presence of an oil temperature within a predetermined oil temperature range; prevention of a scheduled driving of the OPCJ valve for regular piston cooling; and prevention of an error of the oil pressure system. The diagnostic method further including: determining (22) whether an oil pressure measuring point is within a predefined oil pressure measuring point range. The invention further relates to a diagnostic device, a control unit and a motor vehicle, which are each suitable or configured for carrying out the method.

Description

technical field [0001] The invention relates to a diagnostic method for a piston cooling nozzle valve, a diagnostic device, a controller and a motor vehicle. Background technique [0002] There are different types of oil pressure systems for internal combustion engines, such as oil pressure systems with constant displacement pumps, oil pressure systems with stepwise adjustable pumps and oil pressure systems with fully variable displacement pumps. [0003] If using a constant displacement pump or a pump that can be adjusted in steps, one or more oil pressure switches can be provided. Alternatively an oil pressure sensor can be used. For fully variable displacement oil pumps, an oil pressure sensor is usually used, which continuously detects the oil pressure in the oil pressure system. [0004] If switchable piston cooling is used, the hydraulic system can additionally have one or more piston cooling jet valves (KKD valves). In this case, a central piston cooling nozzle val...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): F01P11/18F01P3/08F01M1/20F01M1/08
CPCF01P11/18F01P3/08F01M1/20F01M1/08F16N2260/08F16N2250/04F01M2250/60F01M2250/64
Inventor J.金斯C.勒德维格
Owner VOLKSWAGEN AG