A kind of engine pre-ignition durability test method and device

An endurance test and engine technology, which is applied in the direction of engine testing, measuring devices, machine/structural component testing, etc., can solve problems such as high cylinder pressure, piston breakdown, lack of test methods, etc., to improve reliability, Guarantee the quality of development and improve the effect of the development process

Active Publication Date: 2022-07-01
CHINA FIRST AUTOMOBILE
View PDF8 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Direct-injection supercharged gasoline engines are prone to pre-ignition in the low-speed and heavy-load region. Because the piston is in the upward compression stroke, it will cause very high cylinder pressure and strong knocking, and even super knocking, making the cylinder The maximum explosion pressure in the engine may exceed 20 MPa, which can cause irreversible damage to the components in the engine cylinder, and can easily cause spark plug electrode fusing, piston top breakdown, connecting rod bending and other serious damage to the engine.
[0004] However, the relevant tests in the current engine development stage do not evaluate the engine's ability to withstand pre-ignition, lack of relevant test methods, and cannot test whether the design strength of the core components of the direct injection supercharged gasoline engine can meet the resistance Ability to prematurely burn problems

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
  • A kind of engine pre-ignition durability test method and device
  • A kind of engine pre-ignition durability test method and device
  • A kind of engine pre-ignition durability test method and device

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0051] This embodiment provides an engine pre-ignition durability test method, which can determine whether the test prototype meets the pre-ignition durability requirements, and fills the vacancy of the pre-ignition durability test in the engine test. The engine may be a direct injection supercharged gasoline engine.

[0052] In addition, the engine pre-ignition endurance test is carried out in the engine bench laboratory, and the test prototype (ie the engine to be tested) needs to be normally connected to the dynamometer, fuel consumption meter, combustion analyzer, water temperature control system, bench operating system and other necessary equipment. . By formulating the engine pre-ignition endurance test method, the ability of the engine to resist pre-ignition problems can be effectively verified, so that the designers can reasonably optimize the design scheme of the engine-related core components according to the test results in the engine product development stage, so a...

Embodiment 2

[0099] This embodiment also provides an engine pre-ignition durability test device, which is used to implement the engine pre-ignition durability test method of the above-mentioned embodiment. The engine pre-ignition durability test device includes:

[0100] The first determination module is used to determine that the test prototype meets the requirements of the pre-ignition durability test.

[0101] The control module is used to control the test prototype to complete m test sub-cycles. The test sub-cycle includes controlling the rotation speed of the test prototype to be the cleaning speed, the operating load to be the first load, and the running duration to be the first duration; controlling the rotation speed of the test prototype to be the first speed, the operating load is the second load, the operating time is the second time, the second load is greater than the first load, and the second time is greater than the first time; adjust the test prototype to idle speed, and th...

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 discloses an engine pre-ignition durability test method and device, which belong to the technical field of engine tests. The engine pre-ignition durability test method includes determining that a test prototype meets the pre-ignition durability test requirements, and then controlling the test prototype to complete m sub-cycles. In the second sub-cycle, there is a step of cleaning carbon deposits, a step of generating carbon deposits and two test conditions. The performance parameters of the test prototype are tested and judged. When the performance parameters of the test prototype after the test are the same as those of the test prototype before the test The difference of the performance parameters is within the preset difference range, and it is determined that the deformation of the preset components in the test prototype is within the preset deformation range, then it is determined that the test prototype has passed the pre-ignition durability test assessment. The invention realizes the pre-ignition endurance test of the engine, has high reliability, plays an important role in improving the engine development process and enhancing the engine assessment, and can provide strong support for the R&D personnel to discover the major design defects of the engine in advance.

Description

technical field [0001] The invention relates to the technical field of engine testing, in particular to a method and device for an engine pre-ignition durability test. Background technique [0002] At present, in order to meet the passenger car emission regulations and fuel consumption limit requirements, the supercharged direct injection small displacement engine technology is usually used in the vehicle. However, with the increase of power per liter and torque per liter of small-displacement direct-injection supercharged gasoline engines, the engine is prone to pre-ignition problems in low-speed and high-load areas. [0003] Among them, pre-ignition is an abnormal combustion phenomenon in which the fuel-air mixture starts to ignite and burn before the spark plug ignites. The direct-injection supercharged gasoline engine is prone to pre-ignition in the low-speed and high-load area. Since the piston is in the upward period of the compression stroke, it will cause very high ...

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
Patent Type & Authority Patents(China)
IPC IPC(8): G01M15/00
CPCG01M15/00
Inventor 刘子鸣韩云峰郭英俊闫涛郝伟胡伟兴宋庆文刘晓光周天鹏耿真
Owner CHINA FIRST AUTOMOBILE
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