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Apparatus and method for diagnosing failure of piston cooling jet of engine

a technology of cooling jet and diagnostic apparatus, which is applied in the direction of mechanical apparatus, machines/engines, pressure lubrication, etc., can solve the problems of increasing emissions according to a deterioration of engine thermal efficiency, oil cannot flow, and problems such as problems, to achieve the effect of reducing costs and easy diagnosis of failure of solenoid valves

Inactive Publication Date: 2016-12-15
HYUNDAI MOTOR CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Benefits of technology

The present invention provides a way to diagnose the failure of a solenoid valve in an engine that controls the injection of piston cooling oil. Using an oil pressure switch, it is possible to detect the oil pressure in the piston cooling oil line and prevent damage to the engine's emission regulations and cylinder block caused by failure of the solenoid valve. Additionally, the invention uses a cheap oil pressure switch instead of an expensive sensor, reducing costs.

Problems solved by technology

However, when the solenoid valve has a failure, problems occur as described below.
First, when the solenoid valve is stuck in an open state due to failure, oil continuously flows to the PCJ, so that oil flow occurs and causes an increase in emissions according to a deterioration of engine thermal efficiency.
Second, when the solenoid valve is stuck in a closed state due to failure, oil cannot flow to the PCJ any longer, and the cylinder block may be damaged due to an increase in a temperature of the engine.

Method used

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  • Apparatus and method for diagnosing failure of piston cooling jet of engine
  • Apparatus and method for diagnosing failure of piston cooling jet of engine
  • Apparatus and method for diagnosing failure of piston cooling jet of engine

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Embodiment Construction

[0037]Hereinafter reference will now be made in detail to various embodiments of the present disclosure, examples of which are illustrated in the accompanying drawings and described below. While the disclosure will be described in conjunction with exemplary embodiments, it will be understood that the present description is not intended to limit the disclosure to those exemplary embodiments. On the contrary, the disclosure is intended to cover not only the exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the disclosure as defined by the appended claims.

[0038]Hereinafter, an exemplary embodiment of the present disclosure will be described in detail with reference to the accompanying drawings.

[0039]FIG. 4 is a schematic diagram illustrating a piston cooling jet failure diagnosing apparatus of an engine according to the present disclosure.

[0040]As can be seen in FIG. 4, a main oil...

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Abstract

An apparatus for diagnosing failure of a piston cooling jet of an engine includes an oil line for a piston cooling jet arranged in a cylinder block in a longitudinal direction, a piston cooling jet mounted at the oil line for the piston cooling jet to inject oil to a piston, a solenoid valve mounted at an inlet of the oil line for the piston cooling jet to selectively allow an injection operation of the piston cooling jet, an oil pressure detecting means mounted at the oil line for the piston cooling jet after the solenoid valve to detect oil pressure, and a control unit configured to receive a detection signal of the oil pressure detecting means and determine whether the solenoid valve is in a failure state.

Description

CROSS-REFERENCE TO RELATED APPLICATION[0001]This application claims, under 35 U.S.C. §119(a), the benefit priority to Korean Patent Application No. 10-2015-0083285, filed on Jun. 12, 2015 with the Korean Intellectual Property Office, the entire contents of which are incorporated herein by reference.TECHNICAL FIELD[0002]The present disclosure relates to an apparatus and a method for diagnosing a failure of a piston cooling jet of an engine, and more particularly, to an apparatus and a method for diagnosing a failure of a piston cooling jet of an engine, which are capable of determining a failure of a solenoid valve to selectively operate a piston cooling jet.BACKGROUND[0003]A main oil gallery formed in a cylinder block of an engine for a vehicle serves as a path for lubricating oil from the cylinder block to a crank shaft and various perturbation units.[0004]In addition to the main oil gallery, to prevent the piston ring from being burned increasing thermal fatigue stresses of a pist...

Claims

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Application Information

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Patent Type & Authority Applications(United States)
IPC IPC(8): F01P11/14F01P3/08
CPCF01P11/14F01P2003/006F01P3/08F01P11/18F01P2025/04F01P2050/22F01M1/08F01M1/16F01M2250/00
Inventor KIM, SEUNG BUM
Owner HYUNDAI MOTOR CO LTD
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