Hybrid electric vehicle and its control system and control method
A hybrid electric vehicle and control system technology, applied in the field of automobile manufacturing, can solve the problems of energy consumption, oil pump burnout, shortened life, etc., and achieve the effects of avoiding consumption, avoiding damage, and high accuracy
Active Publication Date: 2019-06-07
BYD CO LTD
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Problems solved by technology
Therefore, it will cause the engine to become a load and consume energy, and the life of the engine will be shortened if the engine is dragged back for a long time, especially because the oil pump will continue to work when the engine is running, and there is no fuel at this time, causing the oil pump to burn out due to poor heat dissipation
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[0022] Embodiments of the present invention are described in detail below, examples of which are shown in the drawings, wherein the same or similar reference numerals designate the same or similar elements or elements having 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.
[0023] In addition, the terms "first" and "second" are used for descriptive purposes only, and cannot be interpreted as indicating or implying relative importance or implicitly specifying the quantity of indicated technical features. Thus, a feature defined as "first" and "second" may explicitly or implicitly include one or more of these features. In the description of the present invention, "plurality" means two or more, unless otherwise specifically defined.
[0024] Any process or method descriptions in flowcharts or otherwis...
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The invention provides a hybrid vehicle as well as a control system and a control method for the hybrid vehicle. The control system comprises an oxygen signal collecting module, a rotation speed collecting module, a gear control module and a control module, wherein the oxygen signal collecting module is used for collecting the oxygen content of exhaust emission of an engine; the rotation speed collecting module is used for collecting current rotation speed of the engine; the gear control module is used for controlling gear connection of the engine; and the control module is used for judging whether the engine is in a fuel-free state or not according to the oxygen content and the current rotation speed and transmitting a control instruction for cutting off the gear connection when the engine is in the fuel-free state. According to the control system provided by the embodiment of the invention, whether the hybrid vehicle is in the fuel-free state in the running process or not can be accurately judged, the engine can be protected against being reversely dragged, damage to the engine can be avoided and the energy of a power battery can be prevented from being consumed because the engine becomes the load. In addition, a fuel pump is closed in time and the engine is forbidden to be started when the engine is judged to be in the fuel-free state; therefore, the fuel pump and the engine can be further protected against being damaged.
Description
technical field [0001] The invention relates to the technical field of automobile manufacturing, in particular to a hybrid electric vehicle and a control system and control method thereof. Background technique [0002] During the running of the engine of a fuel vehicle, the oil pump generally keeps working continuously to ensure the oil pressure in the fuel system, but when there is too little oil or the fuel is exhausted, if the oil pump continues to work, the heat dissipation of the fuel to the oil pump is reduced. , greatly shorten the service life of the fuel pump, and may even burn the fuel pump. [0003] At present, the body controller can receive the signal of the fuel level sensor in the fuel pump, and judge whether the fuel is too low or exhausted according to the signal of the fuel level sensor. When the fuel is too low or exhausted, the body controller controls the fuel pump to stop working, and when the fuel The engine will also stop working when it runs out. ...
Claims
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IPC IPC(8): B60W10/06B60W10/10B60W10/30B60W20/00
Inventor 汪武东雷振华
Owner BYD CO LTD