Looking for breakthrough ideas for innovation challenges? Try Patsnap Eureka!

Assessment method for working life of valve lash adjustment sheet of engine

A technology for engine valves and working life, which is applied in special data processing applications, instruments, electrical digital data processing, etc., and can solve the problems of valve cam profile wear, impact, large impact and noise, etc.

Active Publication Date: 2016-03-16
CHINA NORTH ENGINE INST TIANJIN
View PDF4 Cites 2 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Once the valve clearance adjustment piece fails, it will cause abnormal wear of the valve cam profile in contact with it, and the damage of the cam profile will affect the valve clearance and valve movement, which will affect the performance of the engine and lead to irregular valve movement. Continuously produce large impact and noise, and sometimes cause other failures

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
  • Assessment method for working life of valve lash adjustment sheet of engine
  • Assessment method for working life of valve lash adjustment sheet of engine
  • Assessment method for working life of valve lash adjustment sheet of engine

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0026] It should be noted that, in the case of no conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other.

[0027] In addition, the task profile of the engine mentioned in the embodiments of the present invention refers to the time sequence description of the engine's rotational speed, power and torque during the period when the engine completes the specified task.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and examples.

[0029] A method for assessing the service life of an engine valve clearance adjustment plate, such as figure 1 shown, including the following steps:

[0030] Step 1, determine the working condition of the engine and its corresponding working time and working speed;

[0031] Specifically, according to the task profile of the engine, determine the working conditions included in the engine task profile, and determine the correspond...

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 provides an assessment method for working life of a valve lash adjustment sheet of an engine. The method comprises the following steps of: determining a working condition as well as corresponding working time and working speed of the engine; determining a maximum contact stress of the valve lash adjustment sheet of the engine working in different working conditions; determining a contact fatigue strength parameter of the valve lash adjustment sheet; determining effective contact stress and working condition for life assessment of the valve lash adjustment sheet; determining an engine mission profile cycle index of the valve lash adjustment sheet; and determining the working life of the valve lash adjustment sheet. The method has the following advantages: the working life of the valve lash adjustment sheet can be determined for a specific mission profile of the engine, and the reliability assessment, structural optimization design and repair scheme establishment of the valve lash adjustment sheet can be effectively guided.

Description

technical field [0001] The invention belongs to the technical field of diesel engine structure reliability evaluation, and in particular relates to an evaluation method for the service life of an engine valve clearance adjusting plate. Background technique [0002] The valve clearance adjustment piece is one of the core parts of the diesel engine valve train. The reliability of the valve clearance adjustment plate directly affects the reliability of the engine valve train, and also affects the performance indicators such as the output power of the engine. Contact fatigue damage is one of the typical failure modes of the valve clearance trim. When the contact fatigue failure occurs in the valve clearance trim, the surface of the valve clearance trim will peel off and wear abnormally. Once the valve clearance adjustment piece fails, it will cause abnormal wear of the valve cam profile in contact with it, and the damage of the cam profile will affect the valve clearance and va...

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): G06F17/50
Inventor 王正王增全王小慧王阿娜和龙
Owner CHINA NORTH ENGINE INST TIANJIN
Who we serve
  • R&D Engineer
  • R&D Manager
  • IP Professional
Why Patsnap Eureka
  • Industry Leading Data Capabilities
  • Powerful AI technology
  • Patent DNA Extraction
Social media
Patsnap Eureka Blog
Learn More
PatSnap group products

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

© 2024 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com