Unlock instant, AI-driven research and patent intelligence for your innovation.
Self-learning control method and device for EGR valve of engine
What is Al technical title?
Al technical title is built by PatSnap Al team. It summarizes the technical point description of the patent document.
An EGR valve, self-learning technology, applied in the direction of engine control, combustion engine, machine/engine, etc., can solve the problems of sensor offset, affecting the service life of EGR valve, etc., and achieve the effect of ensuring normal control
Active Publication Date: 2021-04-13
WEICHAI POWER CO LTD
View PDF9 Cites 0 Cited by
Summary
Abstract
Description
Claims
Application Information
AI Technical Summary
This helps you quickly interpret patents by identifying the three key elements:
Problems solved by technology
Method used
Benefits of technology
Problems solved by technology
However, sensor offset is a problem caused by long-term driving, and self-learning every time is not necessary, and frequent self-learning may affect the service life of the EGR valve
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
Click on the blue label to locate the original text in one second.
Reading with bidirectional positioning of images and text.
Smart Image
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0044] Such as figure 1 As shown, the self-learning control method of an engine EGR valve provided in this embodiment includes:
[0046] Based on the detection results, it is determined to adopt a self-learning mileage control strategy or a self-learning running time control strategy;
[0047] controlling the EGR valve based on different control strategies;
[0048] Wherein, the self-learning mileage refers to the sum of the mileage of the engine since the first start, and the self-learning running time refers to the sum of the running time of the engine since the first start.
[0049] Further, the vehicle types include road vehicles and non-road vehicles.
[0050] Further, the road vehicle adopts a self-learning mileage control strategy.
[0051] Further, the off-road vehicle adopts a self-learning runtime control strategy.
[0052] Further, the self-learning mileage control strategy includes:
[0053] comparing the self-learning mileage with...
Embodiment 2
[0061] The driving information of the engine includes information such as driving mileage and engine running time. When the power is turned off, the current value of these information will be stored in the EEPROM area of the ECU controller. After power on again, read variable information from EEPROM for engine control. Add the EGR valve self-learning mileage and self-learning running time in EEPROM, and judge whether to perform EGR valve self-learning according to the self-learning mileage or self-learning running time.
[0062] The specific logic includes:
[0063] 1) if figure 2 As shown, the self-learning mileage calculation is calculated according to the vehicle speed signal. When the vehicle speed is not 0, the timer starts counting. After the vehicle speed is 0, the calculation is stopped, and the accumulated mileage value is stored in the EEPROM when the power is turned off (unit: m) ;
[0064] 2) if image 3 As shown, the calculation of the self-learning running...
Embodiment 3
[0102] Such as Figure 6 As shown, the present embodiment also provides a self-learning control device for the EGR valve of the engine, which is characterized in that it includes:
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
Login to View More
Abstract
The invention discloses a self-learning control method and device for an EGR valve of an engine. The self-learning control method comprises the steps that the type of a vehicle is detected; adopting a self-learning mileage control strategy or a self-learning running time control strategy is determined based on a detection result; the EGR valve is controlled on the basis of different control strategies; and the self-learning mileage refers to the sum of the driving mileage of the engine after the engine is started for the first time, and the self-learning running time refers to the sum of the running time of the engine after the engine is started for the first time. According to the engine EGR valve self-learning control method provided by the embodiments, when the EGR valve is aged, the elastic force of a spring is reduced, the ash shaking capacity is reduced, and unnecessary self-learning caused by too small power-off driving mileage is avoided. According to the self-learning method, normal control of the EGR valve can be guaranteed, and the service life of the EGR valve is not shortened, so that the technology has a wide prospect, and market requirements can be met.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to an engine EGR valve self-learning control method and device. Background technique [0002] Because of its economy and environmental protection, gas engine has been widely recognized by people, and it is more and more used in various power equipment. When the gas engine is working, it adopts the way of pre-mixed intake air to provide flammable mixed gas for the cylinder of the engine, that is, the gas and air are mixed in the mixer and then injected into the combustion chamber of the engine through the mixed air channel to burn for work. In order to optimize engine emissions, an exhaust gas recirculation EGR valve is installed on the engine exhaust pipe to return part of the exhaust gas discharged from the engine to the intake manifold and re-enter the cylinder together with fresh mixed gas. On the one hand, part of the exhaust gas can be re-combusted To reduce emission pollution...
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
Application Date:The date an application was filed.
Publication Date:The date a patent or application was officially published.
First Publication Date:The earliest publication date of a patent with the same application number.
Issue Date:Publication date of the patent grant document.
PCT Entry Date:The Entry date of PCT National Phase.
Estimated Expiry Date:The statutory expiry date of a patent right according to the Patent Law, and it is the longest term of protection that the patent right can achieve without the termination of the patent right due to other reasons(Term extension factor has been taken into account ).
Invalid Date:Actual expiry date is based on effective date or publication date of legal transaction data of invalid patent.
Login to View More 
Login to View More