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A method for controlling the critical speed of hybrid electric vehicle engine

A hybrid vehicle and engine speed technology, applied in the field of vehicle control, can solve problems such as poor driving experience, decreased driving stability, and engine speed fluctuations, and achieve the effects of improving driving experience, stability and economy.

Active Publication Date: 2021-01-01
一汽解放青岛汽车有限公司 +1
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Problems solved by technology

[0004] The purpose of the present invention is to provide a method for controlling the critical speed of a hybrid vehicle engine, which can solve the problem that when the speed of the engine fails to match the working state of the speed-regulating motor, the speed of the engine will fluctuate greatly or cause increased fuel consumption, which will cause driving problems. Decreased stability and poor driving experience

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  • A method for controlling the critical speed of hybrid electric vehicle engine

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Embodiment Construction

[0054] The technical solutions of the present invention will be further described below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, but not to limit the present invention. In addition, it should be noted that, for the convenience of description, only the parts related to the present invention are shown in the drawings but not all of them.

[0055] In the description of the present invention, it should be noted that unless otherwise specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection or a detachable connection. Connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediary, and it can be the internal communication of two components. Those of ordin...

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Abstract

The invention relates to the technical field of automobile control, in particular to a control method for a critical rotating speed of a hybrid vehicle engine. The control method comprises the following steps of calculating a speed range of the engine in a driving process of a speed regulating motor; calculating a speed range of the engine in a power generation process of the speed regulation motor; calculating a speed range of the engine when a driving power of the speed regulating motor meets a speed regulation requirement of the engine; calculating a working interval of the engine through traversal when the speed regulating motor is in a driving state; calculating a speed range of the engine when the power generation power of the speed regulating motor meets the speed regulation requirement of the engine; calculating a work interval of the engine in a power generation state of the speed regulation motor through traversal; and controlling a state of the speed regulating motor according to the engine working interval where a target speed of the engine is located. According to the control method, the defect that a speed range is determined only according to a speed relationship isovercome, the driving stability and economy are improved, and the driving experience is improved.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a method for controlling the critical rotational speed of a hybrid electric automobile engine. Background technique [0002] Hybrid vehicles are currently the mainstream of clean energy vehicles. On the one hand, they can make up for the short driving range of pure electric vehicles, and on the other hand, they can greatly reduce fuel consumption and exhaust emissions compared with traditional vehicles. Hybrid electric vehicles have power sources such as internal combustion engines and electric motors, and have complex structures. How to effectively manage energy for multiple power sources at the same time is the key to giving full play to the advantages of energy saving and environmental protection of hybrid electric vehicles. [0003] The planetary gear structure is widely used in the transmission system of hybrid electric vehicles. Because of its unique structure, t...

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60W10/06B60W10/08B60W20/15
CPCB60W10/06B60W10/08B60W2710/0644B60W2710/081B60W20/15Y02T10/62
Inventor 刘涛庄晓林松霖宋俊良邵阳唐超李凡
Owner 一汽解放青岛汽车有限公司
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