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Method of determining cylinder health in reciprocating piston engine

A technology of health, cylinders, applied in the field of piston operation, determination of cylinder leakage characteristics and other parameters, able to solve problems such as limited accuracy

Active Publication Date: 2017-07-14
DEERE & CO
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 reciprocating piston engine
  • Method of determining cylinder health in reciprocating piston engine
  • Method of determining cylinder health in 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 accompanying drawings 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 firmly anchor the engine under test, which allows for various differences in the efficiency of cold (or other) testing of the engine. an improvement.

[0030] A TDC measurement ("quantity (permissible launch) method (or process, application, etc.)) may be performed on a variety of reciprocating engines (or other reciprocating machines), including various work vehicles such as tractors, motor graders, skid tractors etc. In so...

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PUM

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Abstract

Computer-implemented methods, computer program products, and computer systems are described for determining cylinder health characteristic in a reciprocating piston engine of the type including a piston-cylinder assembly and a crankshaft. The piston-cylinder assembly includes a cylinder and a piston configured to translate within the cylinder as the crankshaft rotates. In one embodiment, the computer-implemented method includes rotating the crankshaft in a first direction, while generating a first data set comprising a first plurality of piston position measurements and corresponding pressure indicator measurements. The crankshaft is further rotated in a second opposing direction, while a second data set is generated comprising a second plurality of piston position measurements and corresponding pressure indicator measurements. A symmetric aspect between the first and second data sets is then identified and utilized to determining a cylinder health characteristic for 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 more particularly to accurately determining the position of top dead center of various pistons of such engines (or devices), and cylinder leakage characteristics in relation to cylinder health in reciprocating piston engines and other parameters. Background technique [0002] In reciprocating engines and other devices, pistons can reciprocate in cylinders to generate useful power. In a typical internal combustion engine, for example, one or more pistons may be enclosed in one or more respective cylinders, with each piston connected to the crankshaft by a connecting rod. At the end opposite the crankshaft, each cylinder may be enclosed (eg, by an engine cylinder head), whereby the piston (together with the cylinder) defines a combustion chamber. Various valves and other mechanisms may control the inflow a...

Claims

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Application Information

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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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