Supercharge Your Innovation With Domain-Expert AI Agents!

Method and system for diagnostic testing of engine crankshaft/camshaft synchronous signal

A diagnostic test and synchronous signal technology, applied in the direction of engine components, machines/engines, mechanical equipment, etc., can solve the problems of many contents and long time consumption, and achieve the effect of reducing infeasibility, saving manpower and time

Active Publication Date: 2021-07-16
VITESCO AUTOMOTIVE ELECTRONICS (CHANGCHUN) CO LTD
View PDF3 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since this test has a lot of content and takes a long time, in order to save various resources, it is necessary to automatically run this test

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
  • Method and system for diagnostic testing of engine crankshaft/camshaft synchronous signal
  • Method and system for diagnostic testing of engine crankshaft/camshaft synchronous signal

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0051]In the present invention, by writing relevant automatic test scripts and loading them into matching automatic test software tools, the control hardware-in-the-loop system outputs fault signals of various crankshaft position sensors and camshaft position sensors respectively, and then, the engine electronic control system respectively collects These failure signals are detected, and the failure flag variables corresponding to each failure signal are respectively set in the relevant software testing tools, and after several driving cycles, the engine failure indicator signal will also be set. The hardware-in-the-loop system will then resend the normal signals from the crankshaft position sensor and the camshaft position sensor, the previously set fault flag variable will be reset, and after several driving cycles, the engine fault indicator light signal will be reset reset. In the automatic test script, it will judge the setting and reset of the fault flag variable corresp...

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 present invention provides a kind of diagnosis test method of engine crankshaft / camshaft synchronous signal, it comprises step 1, hardware in the loop system supplies power to engine electronic control system through wiring harness, and engine electronic control system establishes communication connection with software testing tool; Step 2, The hardware-in-the-loop system selects the normal crankshaft position signal, the intake camshaft position signal and the exhaust camshaft position signal, and sets a fixed speed, and sends them to the engine electronic control system together; step 3, the hardware-in-the-loop system selects the crankshaft position signal, intake camshaft position signal and exhaust camshaft position signal to replace the normal position signal, and then send it to the engine electronic control system together with the other two normal position signals; step 4, in In the software testing tool, check whether the flag bit corresponding to the fault signal in step 3 is set; in step 5, if it is set, it passes; in step 6, if it is not set, it fails.

Description

technical field [0001] The invention relates to a diagnostic test method and system for an engine crankshaft / camshaft synchronous signal, in particular to an online automatic diagnostic test method and system for an engine crankshaft / camshaft synchronous signal based on a hardware-in-the-loop system. Background technique [0002] The synchronous rotation of the crankshaft and camshaft of the engine is a prerequisite for the engine to start normally and run smoothly. At the same time, the engine electronic control system needs to collect the correct crankshaft position sensor signal and camshaft position sensor signal, and control the ignition advance angle and fuel injection quantity through precise calculation, so that the engine can achieve the best torque under various working conditions output and exhaust emissions. [0003] For a long time, the fault diagnosis of the crankshaft position sensor signal and the camshaft position sensor signal by the engine electronic cont...

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): F02B77/08
CPCF02B77/083
Inventor 龚睿
Owner VITESCO AUTOMOTIVE ELECTRONICS (CHANGCHUN) CO LTD
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

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

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com