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Method of determining cylinder health in a reciprocating piston engine

A health status, piston technology, applied in the determination of cylinder leakage characteristics and other parameters, the field of piston operation, can solve problems such as limited precision

Active Publication Date: 2021-10-12
DEERE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, this method has various disadvantages, including somewhat limited accuracy, the need to securely hold the engine in place to perform the test, and generally the inability to perform the test with the cylinder head in place

Method used

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  • Method of determining cylinder health in a reciprocating piston engine
  • Method of determining cylinder health in a reciprocating piston engine
  • Method of determining cylinder health in a reciprocating piston engine

Examples

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Embodiment Construction

[0028] One or more exemplary embodiments of the disclosed systems and methods are described below, as illustrated in the figures briefly described above.

[0029] As seen above, it can be useful to accurately determine the TDC of a reciprocating piston. In various embodiments, the methods (or computer systems or computer program products) disclosed herein can achieve a high level of determination accuracy. Further, in certain embodiments, the disclosed method allows TDC to be determined with the cylinder head in place or without the need to securely anchor the engine under test, which allows for various variations in the efficiency of cold (or other) testing of the engine. kind of improvement.

[0030] A TDC measurement ("quantity (period engine) method (or process, application, etc.) can be performed on various reciprocating engines (or other reciprocating machines), including various work vehicles such as tractors, motor graders, skidder tractors etc. In some embodiments, ...

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PUM

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Abstract

The present application discloses a computer-implemented method, computer program product, and computer system to determine cylinder health characteristics in a reciprocating piston engine. A reciprocating piston engine is of the type that includes a piston-cylinder assembly and a crankshaft. A piston-cylinder assembly includes a cylinder and a piston configured to move within the cylinder as the crankshaft rotates. In one embodiment, a computer implementation includes rotating a crankshaft in a first direction while generating a first data set including a plurality of first piston position measurements and corresponding pressure index measurements. Further, the crankshaft is rotated in a second, opposite direction while generating a second data set comprising a plurality of second piston position measurements and corresponding pressure index measurements. Aspects of symmetry between the first data set and the second data set are then identified and used to determine a cylinder health characteristic of the piston-cylinder assembly.

Description

technical field [0001] The present disclosure relates to a reciprocating piston engine and similar devices. In particular, the disclosure relates to piston operation, and in particular to accurately determining the position of top dead center of the various pistons of such an engine (or device), and the characteristics of cylinder leakage in relation to cylinder health in reciprocating piston engines and determination of other parameters. Background technique [0002] In reciprocating engines and other devices, pistons reciprocate within cylinders to produce useful power. In a typical internal combustion engine, for example, one or more pistons may be housed in one or more corresponding cylinders, with each piston connected to a crankshaft by a connecting rod. At an end opposite the crankshaft, each cylinder may be enclosed (eg by an engine cylinder head) whereby a piston (together with the cylinder) defines a combustion chamber. At this point various valves and other mec...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/22F02D41/26
CPCF02D41/22F02D41/26F02D35/023F02D41/009F02D41/2432G01M15/06Y02T10/40
Inventor 乔治·P·李森科凯文·A·普赖斯凯尔·M·克里舍
Owner DEERE & CO
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