Engine emission control method and system and vehicle

An emission control and engine technology, applied in the direction of engine control, engine components, machines/engines, etc., can solve the problems of unstable exhaust gas, exceeding the limit, etc., and achieve the effect of preventing rapid changes and simple control logic.

Active Publication Date: 2022-08-02
BYD CO LTD
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Based on this, it is necessary to provide an engine emission control method, system, and vehicle for the above technical problems, so as to solve the problems of unstable or even exceeding the limit of vehicle exhaust emissions.

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
  • Engine emission control method and system and vehicle
  • Engine emission control method and system and vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0022] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0023] The engine emission control method provided in this embodiment is applied to a controller of an engine emission control system; the controller may include one or more modules. like figure 1 As shown, the engine emission control system includes a carbon canister 1, which is used for absorbing the mixture from the fuel tank 3, and the carbon canister 1 is provided with a control for delivering the mixture to the combustion chamber of 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 relates to the technical field of engines, and discloses an engine emission control method and system and a vehicle. The method comprises the steps that under the condition that an engine is started, a wide oxygen signal corresponding to current emission tail gas of an engine combustion chamber is obtained, and the pressure ratio change value of a carbon tank is obtained; when it is judged that the pressure ratio change value is larger than the preset threshold value, the first opening degree of the carbon tank is determined according to the wide oxygen signal, and the second opening degree is determined according to the current flow of the carbon tank and the pressure ratio change value; a target opening degree is determined according to the first opening degree and the second opening degree, a control valve of the carbon tank is controlled to be adjusted to the target opening degree from the current opening degree, and the target opening degree is the minimum value of the first opening degree and the second opening degree. The oxygen content in the combustion chamber of the engine can be controlled to be kept in a reasonable and controllable interval; and meanwhile, the constant gas inlet flow of the mixed gas conveyed from the carbon tank to the combustion chamber of the engine is ensured, so that the lowest pollutant content in the to-be-exhausted gas of the engine is stably ensured.

Description

technical field [0001] The present invention relates to the technical field of engines, and in particular, to an engine emission control method, system and vehicle. Background technique [0002] At present, the pollutant emission control requirements of vehicles are becoming more and more stringent. For example, the limit of carbon monoxide pollutants has been lowered from 1g / km to 0.5g / km. Stability puts forward higher requirements. In the prior art, there is a method of regulating the ratio of fuel injection amount and air amount after vehicle startup, so that the engine combustion chamber is in an ideal air-fuel ratio state, so as to control exhaust pollutants. The disadvantage of this scheme is that due to many factors that affect the air-fuel ratio in the combustion chamber of the engine, it is difficult to achieve stable control of pollutants in the exhaust gas during the actual control process, which will still lead to inconsistencies in the exhaust gas. Stability o...

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): F02D41/00F02M25/08
CPCF02D41/004F02M25/0836Y02T10/40
Inventor 肖武迪王睿
Owner BYD 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