Detection method of urea injection system, vehicle control device and storage medium
A technology of urea injection system and detection method, which is applied in the detection of urea injection system, vehicle control device and storage medium, which can solve the problems of low accuracy and achieve the effect of avoiding losses
Active Publication Date: 2022-03-01
WEICHAI POWER CO LTD
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[0005] The present application provides a detection method for a urea injection system, a vehicle control device and a storage medium, so as to solve the problem of low accuracy in the prior art in judging whether there is leakage or blockage in the system only by the change of urea consumption
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[0041] In order to make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments It is a part of the embodiments of this application, not all of them. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of this application.
[0042] With the popularity of automobiles and the advancement of technology, automobiles, as a common means of transportation, have been more and more widely used in people's lives, and environmental problems caused by automobile exhaust have also followed. With the continuous aggravation of environmental pollution, the emission standards are also gradually u...
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The present application provides a detection method of a urea injection system, a vehicle control device and a storage medium. In this method, when the urea injection system enters the detection state, the injection valve is closed to control the speed of the urea pump to reach a preset speed, and the system The pressure is maintained at the preset pressure value. After the system pressure stabilizes, control the speed of the urea pump to decrease to the first speed and keep it constant, periodically sample multiple pressure values of the urea injection system according to the preset time interval, and determine the urea injection according to the multiple pressure values Whether there is a leak in the system. By sampling the system pressure at fixed time intervals, it is possible to compare the pressure with the ideal state, detect the leakage in time, avoid the loss caused by urea leakage, and replace the process of using urea consumption for detection. It effectively solves the problem of low accuracy in judging whether there is leakage or blockage in the system only by the change of urea consumption.
Description
technical field [0001] The present application relates to the technical field of vehicle detection, in particular to a detection method of a urea injection system, a vehicle control device and a storage medium. Background technique [0002] With the continuous aggravation of environmental pollution, the emission standards are also gradually upgraded, and the issue of engine exhaust emissions has attracted more and more attention from the industry and the country. In order to alleviate the problem of environmental pollution, people mainly use Selective Catalytic Reduction (SCR) technology to spray quantitative urea aqueous solution (32.5% urea aqueous solution) into the exhaust pipe to hydrolyze ammonia (NH 3 ) reduction reaction to reduce the emission of nitrogen oxides (NOx) in diesel engine exhaust. However, the urea injection system may leak due to the aging of the components during use. After working for a period of time, some small fibers will remain in the urea inject...
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IPC IPC(8): F01N11/00F01N3/20
CPCF01N11/00F01N3/208F01N2610/02F01N2570/14F01N2900/104F01N2900/1808F01N2900/12Y02T10/12Y02T10/40Y02A50/20
Inventor 王毓源王金平徐文双赵杰侯郭顺
Owner WEICHAI POWER CO LTD