Cold start control method and device and electronic control unit

A cold start and engine technology, applied in the field of vehicles, can solve problems such as engine stall and engine start failure, and achieve the effect of ensuring successful start and avoiding excessive intake air temperature.

Active Publication Date: 2020-02-21
WEICHAI POWER CO LTD
View PDF9 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] However, the inventor found that at least the following problems exist in the prior art: when the sensor is installed close to the intake heating grid, the temperature measured by the sensor has exceeded the preset temperature limit due to the high temperature of

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
  • Cold start control method and device and electronic control unit
  • Cold start control method and device and electronic control unit
  • Cold start control method and device and electronic control unit

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0049]The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0050] The terms "first", "second", "third", "fourth", etc. (if any) in the description and claims of the present invention and the above drawings are used to distinguish similar objects and not necessarily Describe a specific order or sequence. It is to be understood that the data so used are interchangeable under appropriate circumstances such that the embodiments of the invention described herein are, for example, capable of practice in sequences other than ...

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 a cold start control method and device and an electronic control unit. The method comprises the following steps that when the cold start of an engine is detected, an engine parameter and an air inlet heating relay parameter are acquired; whether the engine parameter meets a first preset overheating protection condition or not is judged, and whether the air inlet heating relay parameter meets a second preset overheating protection condition or not is judged; if the engine parameter meets the first preset overheating protection condition and the air inlet heating relay parameter meets the second preset overheating protection condition, a preset overheating protection coefficient is set to be a preset protection value, so that an overheating protection device stops performing overheating protection operation according to the preset overheating protection coefficient set to be the preset protection value. According to the method and device and the unit, the situationthat the intake air temperature is too high due to heating of an air inlet heating grid, so that the overheating protection operation is performed, and then the engine flameout is generated is effectively avoided.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of vehicles, and in particular to a cold start control method, device and electronic control unit. Background technique [0002] When the engine is cold-started, it is necessary to use the intake heating grid to preheat the gas in the intake pipe. After a long time of warm-up, the temperature of the intake heating grid will exceed 500°C. The temperature in the intake pipe measured by the sensor The gas temperature, i.e. the intake air temperature, can also be very high. [0003] In the prior art, in order to avoid damage to the engine due to excessively high intake air temperature, an overheating protection mechanism is required, that is, after it is determined that the intake air temperature measured by the sensor exceeds the preset temperature limit, the corresponding protection function is activated to Oil restriction is performed on the engine so that the engine stalls and thus pro...

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): F02D41/06F02D41/00F02M31/13
CPCF02D41/0002F02D41/064F02M31/13F02D2200/0414
Inventor 侯健鹏马雁张小田刘加超
Owner WEICHAI POWER CO LTD
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