Control method for avoiding low efficiency area of adjustable speed motor of hybrid electric vehicle

A hybrid electric vehicle and speed-regulating motor technology, applied in the field of vehicle control, can solve the problems of speed-regulating motor damage, motor water temperature increase, speed-regulating motor efficiency reduction, etc., and achieve the effect of ensuring normal operation

Active Publication Date: 2019-12-20
一汽解放青岛汽车有限公司 +1
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Problems solved by technology

When the speed-regulating motor passes through the mechanical point (zero point), the efficiency of the speed-regulating motor will be seriously reduced because the speed is close to 0rpm. At this time, all the electric po

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  • Control method for avoiding low efficiency area of adjustable speed motor of hybrid electric vehicle

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[0035] The technical solution of the present invention will be further described below in conjunction with the drawings and embodiments. It can 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 ease of description, the drawings only show parts related to the present invention, but not all.

[0036] In the description of the present invention, it should be noted that the terms "installed", "connected" and "connected" should be understood in a broad sense, unless otherwise clearly specified and limited. For example, they can be fixed or detachable. Connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication between two components. For those of ordinary skill in the art, the specific meaning of the above-m...

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Abstract

The invention relates to the technical field of vehicle control, in particular to a control method for avoiding a low efficiency area of an adjustable speed motor of a hybrid electric vehicle. The control method comprises the following steps of S1, calculating the speed lower limit n<ec_dwn> of an engine when the adjustable speed motor is in the charging state; S2, calculating the speed upper limit n<ed_up> of the engine when the adjustable speed motor is in the driving state; S3, calculating the target required speed n<dem> of the engine; going on S4 if the target required speed n<dem> of theengine is higher than the speed lower limit n<ec_dwn> of the engine, or the target required speed n<dem> of the engine is lower than the speed upper speed n<ec_up> of the engine; or else going on S5;S4, controlling the speed of the engine to the target required speed n<dem> of the engine; S5, correcting the target required speed n<dem> of the engine, and enabling the adjustable speed motor to avoid the low efficiency area; and controlling the speed of the engine to the corrected target required speed n<deml> of the engine. According to the control method, the adjustable speed motor is enabled to avoid the low efficiency area, so that the electric power is prevented from being converted into thermal power completely; and it is ensured that the adjustable speed motor works properly.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a control method for avoiding the low-efficiency zone of a speed-regulating motor of a hybrid electric vehicle. Background technique [0002] With the development of the automobile industry, people pay more and more attention to the environmental protection of automobiles. In order to ensure that the vehicle has sufficient power while taking into account environmental protection, hybrid vehicles have become the mainstream of the current development of clean energy vehicles. Hybrid vehicles can make up for the short driving range of pure electric vehicles, and at the same time can greatly reduce fuel consumption and exhaust emissions compared with traditional vehicles. The power source of a hybrid electric vehicle includes an internal combustion engine and an electric motor. How to effectively manage the energy of the power source at the same time is the key to exertin...

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Application Information

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IPC IPC(8): B60W10/06B60W20/15
CPCB60W10/06B60W2710/0644B60W20/15
Inventor 庄晓谷友全周志升林松霖闫贺崔浩丁仲远
Owner 一汽解放青岛汽车有限公司
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