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

Hybrid vehicle engine starting control method and system and hybrid vehicle

A technology of engine start and engine, applied in the field of vehicles, can solve the problems of increased pollutant emissions, high fuel consumption, structural damage, etc., and achieve the effect of reducing emissions and reducing fuel consumption

Pending Publication Date: 2020-11-06
BAIC MOTOR CORP LTD
View PDF21 Cites 5 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Since the engine has not been working for a long time at this time and is still in a cold state, if it is started directly and participates in driving, the fuel consumption will be quite high. At the same time, the temperature of the three-way catalytic converter is lower than the light-off temperature, which will increase the emission of pollutants; in addition, The structure of the engine may also be damaged when it is started from a cold state and directly delivers torque

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
  • Hybrid vehicle engine starting control method and system and hybrid vehicle
  • Hybrid vehicle engine starting control method and system and hybrid vehicle
  • Hybrid vehicle engine starting control method and system and hybrid vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] figure 2 It shows a schematic flowchart of a hybrid vehicle engine startup control method provided by Embodiment 1 of the present invention, as shown in figure 2 As shown, the control method for starting the engine of the hybrid vehicle is specifically as follows:

[0027] 1. Pre-state:

[0028] The hybrid vehicle runs in the pure electric drive mode. At this time, the vehicle torque demand is low, and the vehicle is only driven by the motor; the battery SOC is in the normal working range; real-time monitoring of the three-way catalytic converter temperature and engine

[0029] 2. Trigger conditions:

[0030] When the driver deeply steps on the accelerator pedal, the torque demand of the vehicle increases, exceeding the upper limit of the torque threshold of the pure electric drive mode, and the engine needs to be started to participate in the drive, and at the same time, the current working temperature of the three-way catalytic converter is read.

[0031] 3. Judg...

Embodiment 2

[0035] image 3 It shows a schematic flowchart of a hybrid vehicle engine startup control method provided by Embodiment 2 of the present invention, as shown in image 3 As shown, the hybrid vehicle engine startup control method according to the embodiment of the present invention is specifically as follows:

[0036]After the hybrid vehicle enters the gasoline-electric hybrid drive mode, it can be determined that the hybrid vehicle has entered a road condition with a large torque demand, and the engine may participate in driving many times during subsequent driving. In order to ensure that the next engine start is within the normal operating temperature range, and the temperature of the three-way catalytic converter is higher than the light-off temperature, it is necessary to control the engine start-stop state after the end of the driving process. Its control logic is as follows:

[0037] 1. Pre-state:

[0038] The hybrid vehicle runs in the gasoline-electric hybrid drive m...

Embodiment 3

[0048] Figure 4 It shows a schematic flowchart of an engine start control method for a hybrid electric vehicle provided by Embodiment 3 of the present invention, as shown in Figure 4 As shown, the engine start control method for a hybrid vehicle is specifically as follows:

[0049] 1. Pre-state:

[0050] The vehicle is running in the pure electric drive mode. At this time, the torque demand of the hybrid vehicle is low, and only the motor drives the vehicle; the battery SOC is in the normal working range; the temperature of the three-way catalytic converter and the temperature of the engine coolant are monitored in real time;

[0051] 2. Trigger conditions:

[0052] When the driver deeply steps on the accelerator pedal, the torque demand of the vehicle increases, exceeding the upper limit of the torque threshold of the pure electric drive mode, and the engine needs to be started to participate in the drive, and at the same time, the current working temperature of the three...

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 hybrid vehicle engine starting control method and system and a hybrid vehicle, and relates to the field of vehicles. The method includes the steps that the temperature of a three-way catalyst is obtained under the condition of determining to start an engine in a pure electric drive mode; whether the temperature is lower than an initiation temperature or not is determined;the engine is controlled to be started and further enter into a high idling working state under the condition of determining that the temperature is lower than the initiation temperature, and the engine is controlled to participate in driving under the condition that the temperature reaches the initiation temperature; or the temperature of engine cooling liquid is obtained under the condition thatthe engine is determined to be stopped in an oil and electricity combination drive mode; whether the temperature of the engine cooling liquid is higher than a set temperature or not is determined; and the engine is controlled to enter into a low idling working state under the condition of determining that the temperature of the engine cooling liquid is not higher than the set temperature, and theengine is stopped when the temperature of the engine cooling liquid is higher than the set temperature. The problem that the engine directly outputs torque in a cold machine state to cause engine damage is avoided.

Description

technical field [0001] The present invention relates to the field of vehicles, in particular to a hybrid vehicle engine startup control method, system and hybrid vehicle. Background technique [0002] During a driving process of a hybrid electric vehicle (also known as a hybrid vehicle), it may appear that the pure electric mode starts and drives for a period of time, or after a long period of continuous driving in the pure electric mode, the vehicle torque demand increases, and the engine needs to be started to participate in the drive. Condition. Since the engine has not been working for a long time at this time and is still in a cold state, if it is started directly and participates in driving, the fuel consumption will be quite high. At the same time, the temperature of the three-way catalytic converter is lower than the light-off temperature, which will increase the emission of pollutants; in addition, Structural damage can also occur when an engine is started from a c...

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 Applications(China)
IPC IPC(8): F02D41/08F02N11/08F02D29/02
CPCF02D41/08F02D41/0255F02N11/0818F02D29/02
Inventor 徐洋刘洋马海涛尹亿光杨俊超
Owner BAIC MOTOR CORP LTD
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