Engine air cylinder sealing performance test method and system

A technology of engine cylinder and test system, which is applied in the direction of engine test, fluid tightness test, machine/structural component test, etc. It can solve the problems of engine component damage, long test process, and component complexity, and improve test efficiency. , improve accuracy, and test rapid results

Inactive Publication Date: 2015-08-26
SINO TRUK JINAN POWER
View PDF6 Cites 7 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In the prior art, mechanical methods are usually used for dismantling and inspection. The parts used are relatively complicated, the disassembly and assembly are cumbersome, and the test process is long, which cannot m

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Engine air cylinder sealing performance test method and system

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0033] The present invention will be further described in detail below in conjunction with the accompanying drawings.

[0034] A kind of engine cylinder airtightness testing method of the present invention comprises:

[0035] Step A, detecting the top dead center of the cylinder to be tested of the electronically controlled engine to be tested on the vehicle to be tested;

[0036]Step B, within one cycle of the crankshaft rotating at a certain speed, record the time t it takes for the crankshaft to turn from the α° position before the top dead center detected in the above step A to the top dead center detected in the above step A 1 , and record the time t it takes for the crankshaft to turn from the top dead center detected in the above step A to the β° position after the top dead center detected in the above step A 2 ;

[0037] Step C, respectively calculate the crankshaft in the above time length t 1 and duration t 2 Angular velocity of internal rotation ω 1 , ω 2 , wh...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

PUM

No PUM Login to view more

Abstract

The invention relates to an engine air cylinder sealing performance test method and system. The method includes the following steps that: step A, an upper stopping point of an air cylinder to be tested of an electronic-controlled engine to be tested of an automobile to be tested is detected; step B, with the detected upper stopping point adopted as a critical point, time t1 during which a crankshaft rotates from an alpha-degree position before the detected upper stopping point to the detected upper stopping point and t2 during which the crankshaft rotates from the upper stopping point of the air cylinder to be tested of the electronic-controlled engine to be tested to a beta-degree position behind the upper stopping point of the air cylinder to be tested of the electronic-controlled engine to be tested are recorded; step C, angular velocity omega 1 and angular velocity omega 2 of the crankshaft at the time t1 and t2 are calculated respectively; and step D, the omega 1 is compared with preset benchmark angular velocity omega 01, and the omega 2 is compared with preset benchmark angular velocity omega 02, and whether air leakage occurs on the air cylinder to be tested of the electronic-controlled engine to be tested can be judged according to comparison results. The engine air cylinder sealing performance test method and system of the invention have the advantages of convenient testing and convenient use. With the engine air cylinder sealing performance test method and system adopted, disassembly of the engine on the automobile can be avoided, and rapid testing of the sealing performance of the air cylinder of the electronic controlled engine can be realized.

Description

technical field [0001] The invention relates to the field of airtightness testing of engine cylinders, in particular to a method and system for testing the airtightness of engine cylinders, which are used to detect the airtightness of cylinders of electronically controlled engines on electronically controlled automobiles. Background technique [0002] For electronically controlled vehicles, after a period of use, if the piston rings, injector gaskets are worn or the valve clearance becomes larger, the engine cylinders will not be well sealed or leak air, which will cause high fuel consumption and low output power. , work efficiency is low. Therefore, in actual use, it is necessary to periodically test the airtightness of the engine cylinder on the vehicle to monitor the airtightness of the electronically controlled engine on the vehicle. [0003] In the prior art, mechanical methods are usually used for dismantling and inspection, and the components used are relatively comp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to view more

Application Information

Patent Timeline
no application Login to view more
IPC IPC(8): G01M3/00G01M15/00
Inventor 翟霄雁郭庆波高发廷刘海涛
Owner SINO TRUK JINAN POWER
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Try Eureka
PatSnap group products

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic.

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap