Drive control method for range-extended electric vehicle

A technology for electric vehicles and range extension, which is applied to electric vehicles, engine-driven traction, motor vehicles, etc., and can solve the problems of power impact and vehicle performance degradation.

Active Publication Date: 2013-01-02
CHINA FIRST AUTOMOBILE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the electric energy is insufficient, the performance of continuous high-power operation of the whole vehicle will decrease, and the dynamic performance will be affected, so it is not suitable for long-distance driving conditions that require high power.

Method used

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  • Drive control method for range-extended electric vehicle
  • Drive control method for range-extended electric vehicle
  • Drive control method for range-extended electric vehicle

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0088] like Figure 8 As shown, the power system of an extended-range electric vehicle includes an internal combustion engine, a first electric motor, a second electric motor, a dual-clutch transmission and a planetary gear mechanism. The crankshaft of the internal combustion engine (1) is connected to the housing (2) of the dual clutch transmission. The first clutch (3) of the dual-clutch transmission is connected to the planetary gear mechanism through a shaft (14), and the second clutch (4) is connected to the first motor rotor (17). The rotor (11) of the second electric motor is connected with the planet carrier of the planetary gear mechanism, and outputs power through the ring gear. By controlling the engagement or disengagement of the first clutch (3) and the second clutch (4) of the dual-clutch transmission, the switching of the series and parallel operation modes of the assembly can be realized. like figure 1 Among them, the internal combustion engine is used to m...

Embodiment 2

[0158] like Figure 9 As shown, the power system of an extended-range electric vehicle includes an internal combustion engine, a first electric motor, a second electric motor, a dual-clutch transmission and a planetary gear mechanism. The crankshaft of the internal combustion engine (1) is connected to the housing (2) of the dual clutch transmission. The first clutch (3) of the dual-clutch transmission is connected to the planetary gear mechanism through a shaft (14), and the second clutch (4) is connected to the first motor rotor (17). The second motor rotor (11) is connected with the ring gear (5) of the planetary gear mechanism, and outputs power through the planetary carrier (6). By controlling the engagement or disengagement of the first clutch (3) and the second clutch (4) of the dual-clutch transmission, the switching of the series and parallel operation modes of the assembly can be realized. Among them, the internal combustion engine is used to meet the driving power...

Embodiment 3

[0224] like Figure 10 As shown, the power system of an extended-range electric vehicle includes an internal combustion engine, a first electric motor, a second electric motor, a dual-clutch transmission and a planetary gear mechanism. The crankshaft of the internal combustion engine (1) is connected to the housing (2) of the dual clutch transmission. The first clutch (3) of the dual-clutch transmission is connected to the planetary gear mechanism through a shaft (14), and the second clutch (4) is connected to the first motor rotor (17). The rotor of the second electric motor is connected with the sun gear of the planetary gear mechanism, and outputs power through the planet carrier. By controlling the engagement or disengagement of the first clutch (3) and the second clutch (4) of the dual-clutch transmission, the switching of the series and parallel operation modes of the assembly can be realized. Among them, the internal combustion engine is used to meet the driving power...

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Abstract

The invention relates to a drive control method for a range-extended electric vehicle. The method is characterized in that whether an engine is required to participate in working or not is determined according to the target mileage of a driver and the working condition average speed at a power consumption stage. When the target mileage is greater than a mileage threshold and the working condition average speed is greater than an average speed threshold, the engine is required to participate in working; otherwise, the vehicle runs in a pure electric mode all the time. When the engine is required to participate in working, the engine only works when the whole vehicle is required to enter an economic zone, and electrical energy is not actively supplied. At the power consumption stage, a gear is determined according to the driving capability and the working efficiency of a driving motor at the first and second gears. At a power maintaining stage, tandem operation is realized when a power system runs at a low speed, and parallel operation is realized when a power system runs at a high speed; and at the power maintaining stage, the working gear is determined according to the requirement of the engine in a high-efficiency zone. With the adoption of the method, efficient use of energy of the whole vehicle is realized, the driving mileage of the whole vehicle is improved, the running working condition adaptability of the whole vehicle is improved, and efficient work of the engine is realized.

Description

technical field [0001] The invention relates to a drive control method for an extended-range electric vehicle, belonging to the field of control methods for a power system of an extended-range electric vehicle. Background technique [0002] Since the energy density of power batteries cannot meet the needs of vehicles, the current driving range of pure electric vehicles is short and cannot be accepted by users. The range-extended electric vehicle adds an engine drive system on the basis of a pure electric vehicle. When the power is sufficient, the extended-range electric vehicle has full-performance pure electric capability, and the vehicle runs on pure electric power; when the power is insufficient, the engine provides the driving energy of the whole vehicle. Increase the mileage of the vehicle. According to different power system structures, extended-range electric vehicles can be divided into series extended-range electric vehicles, parallel extended-range electric vehicl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W10/115B60W10/02B60W20/00B60L11/12B60L11/14B60K6/442B60L50/15B60L50/16B60W20/20
CPCY02T10/6286Y02T10/6234Y02T10/7077Y02T10/62Y02T10/7072
Inventor 李骏刘明辉罗国鹏赵子亮杨兴旺李川李元
Owner CHINA FIRST AUTOMOBILE
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