Engine control method, engine control system and vehicle
A control method and technology of a control system, applied in the direction of engine control, machine/engine, mechanical equipment, etc., can solve the problems of engine knocking, acceleration, fuel injection and ignition mismatch, and achieve strong practicability and technical requirements. High, satisfying the effect of economic characteristics and dynamic characteristics
Inactive Publication Date: 2019-11-01
BYD CO LTD
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Problems solved by technology
[0002] Engines in the prior art can only use fuel oil with a fixed octane number, and an engine can only use a fuel oil with a fixed octane number, otherwise it will not be possible to obtain stable power output
When fuel with low octane number is used, engine knocking will occur; when fuel with high octane number is used, the ignition advance angle is not the best ignition advance angle matched by the fuel with the octane number, resulting in high The octane number fuel has a long ignition delay period, and the mismatch between fuel injection and ignition results in insufficient combustion and weak acceleration
Method used
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[0018] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings, examples of which are shown in the drawings, wherein the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the figures are exemplary and are intended to explain the present invention and should not be construed as limiting the present invention.
[0019] Current engines generally use fuel with a fixed octane number, that is, an engine generally can only use fuel with one octane number, otherwise it will not be able to obtain stable power output, or even run normally. The main reasons are:
[0020] When burning fuel with the recommended octane number, the engine knock tendency is small, and the engine works near the basic ignition advance angle, so the combustion efficiency is high and the output torque is large;
[0021] When ...
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The invention provides an engine control method. The engine control method comprises the following steps of inputting a fuel oil octane value; selecting an engine control strategy matched with the fuel oil octane value; and controlling the operation of an engine according to the engine control strategy. By means of the engine control method, the engine is capable of working in an optimal efficiency and emission interval when fuel oil with different octane values is used, economic characteristics and power characteristics of a vehicle are met, and meanwhile, the exhaust emission of the vehicleis controlled within the range required by laws and regulations. The invention further provides an engine control system and a vehicle.
Description
technical field [0001] The invention relates to the technical field of engines, in particular to an engine control method, system and vehicle. Background technique [0002] The engine in the prior art can only use fuel oil with a fixed octane number, and one engine can only use a fuel oil with a fixed octane number, otherwise it will not be able to obtain stable power output. When fuel with low octane number is used, engine knocking will occur; when fuel with high octane number is used, the ignition advance angle is not the best ignition advance angle matched by the fuel with the octane number, resulting in high Octane fuel has a long ignition delay period, and the mismatch between fuel injection and ignition results in insufficient combustion and weak acceleration. Contents of the invention [0003] Aiming at the deficiencies in the prior art, the present invention proposes an engine control method, system and vehicle, aiming to improve the deficiencies of the engine in ...
Claims
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Patent Timeline
Login to View More IPC IPC(8): F02D29/02
CPCF02D29/02F02D2200/0611
Inventor 龚泽文拓艳华李凯琦王春生
Owner BYD CO LTD