Method and system for determining fuel vapor amount in crankcase and vehicle
A determination method and crankcase technology, applied in electrical control, fuel injection control, engine components, etc., can solve problems that affect vehicle emission performance, engine air-fuel ratio control is too rich, and the amount of fuel is too much
Active Publication Date: 2021-03-05
ZHEJIANG GEELY HOLDING (GROUP) CO LTD +1
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Problems solved by technology
[0005] In order to solve the above technical problems, the present invention discloses a method, system and vehicle for determining the amount of fuel vapor in the crankcase. The present invention determines the amount of fuel vapor in the crankcase through the air-fuel ratio or the current pressure value of the intake manifold, which can avoid the Unable to determine the amount of fuel vapor in the crankcase, resulting in the actual amount of fuel entering the cylinder is more than the required amount of fuel, which in turn leads to the engine's air-fuel ratio control is too rich, affecting the vehicle's emission performance and other issues
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[0056]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.
[0057] It should be noted that the terms "first" and "second" in the description and claims of the present invention and the above drawings are used to distinguish similar objects, but not necessarily used to describe a specific sequence 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 can be practiced in sequences other than those illustrated...
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The invention discloses a method and system for determining the fuel vapor amount in a crankcase and a vehicle. The method comprises the steps that the state information of an engine is obtained; theworking condition of the vehicle is determined according to the state information; when the vehicle is in a first preset working condition, the first fuel vapor amount increased in the crankcase is determined according to the air-fuel ratio; the third fuel vapor amount in the crankcase is determined according to the preset fuel vapor amount and the first fuel vapor amount; when the vehicle is in asecond preset working condition, the second fuel vapor amount decreased in the crankcase is determined according to the current pressure value of an air inlet manifold; and the third fuel vapor amount in the crankcase is determined according to the preset fuel vapor amount and the second fuel vapor amount. According to the method and system for determining the fuel vapor amount in the crankcase and the vehicle, the fuel vapor amount in the crankcase is determined according to the air-fuel ratio or the current pressure value of the air inlet manifold, and the problems that the amount of fuel actually entering an air cylinder is larger than the required fuel amount, consequently, the air-fuel ratio of the engine is controlled to be larger, and the emission performance of the vehicle is affected can be avoided.
Description
technical field [0001] The invention relates to the technical field of automobiles, in particular to a method, system and vehicle for determining the amount of fuel vapor in a crankcase. Background technique [0002] With the improvement of living standards, the number of automobiles is increasing, and people pay more and more attention to the performance of automobile energy saving and emission reduction. Harmful emissions, according to engine combustion theory, if the engine can always be guaranteed to burn under the theoretical air-fuel ratio, then the emission of harmful substances can be effectively controlled. Therefore, the key way to realize engine emission control is to control the air-fuel ratio of the engine. [0003] In the prior art, the engine has open-loop control and closed-loop control. When the engine is under closed-loop control, the engine control system will use an oxygen sensor to detect the combustion situation of the engine. According to the signal s...
Claims
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IPC IPC(8): F02D41/14F02B77/08
CPCF02D41/1475F02B77/08Y02T10/40
Inventor 李佰奇耿庆凯杜庆宋祥坛姜涛郑曙
Owner ZHEJIANG GEELY HOLDING (GROUP) CO LTD