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Hybrid power system and control method thereof

A hybrid power system and engine technology, which is applied in the direction of control devices, power devices, air pressure power devices, etc., to achieve the effects of reducing mass and size, mature and reliable production technology, and improving efficiency

Inactive Publication Date: 2014-05-21
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Existing hybrid system has adopted the scheme of common overrunning clutch: CN101439665 proposes to be provided with one-way overrunning clutch between the engine with starter and the electric motor The solution, which does not have a transmission, greatly limits the scope of application of the system, and is difficult to meet the needs of normal driving of general vehicles
CN101314325 and CN101334076 propose a scheme for setting an overrunning clutch between the first power source (the engine is connected to the first motor) and the second power source (the second motor). Although this problem can be solved by adding a friction clutch between the engine and the first motor, the addition of a clutch increases the size of the system and the difficulty of control, which offsets the compact structure and simplified operation brought by the use of an overrunning clutch The advantages of engineering application scope and value are limited

Method used

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  • Hybrid power system and control method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] figure 1 It is an embodiment of the present invention. The following further describes the implementation method of the present invention. Of course, the total number of gears of the transmission may not be limited to 3 gears.

[0049] The hybrid power system of the present invention includes an engine 100, a two-way controllable overrunning clutch 200, a first motor 300, a second motor 400, a multi-speed transmission 500, and a battery pack 600. One end of the two-way controllable overrunning clutch 200 is connected to the engine 100. The output shaft is connected, the other end of the two-way controllable overrunning clutch 200 is connected to the output shaft of the first motor 300, the active part of the multi-speed transmission 500 is connected to the two-way controllable overrunning clutch 200, and the driven part of the multi-speed transmission 500 is connected to the second The output shaft of the motor 400 is connected, and the battery pack 600 supplies power to t...

Embodiment 2

[0090] This example image 3 As shown, the two-way controllable overrunning clutch 200 in this embodiment is formed by a combination of a one-way controllable overrunning clutch (forward) 211 and a one-way controllable overrunning clutch (reverse) 212. Four types of the two-way controllable overrunning clutch 200 Table 1 shows the corresponding relationship between the working modes and the modes of the one-way controllable overrunning clutches 211 and 212. Relatively speaking, the one-way controllable overrunning clutch has simple production process, low manufacturing cost and reliable operation.

[0091] Table 1 Comparison of working modes of the combination of two-way controllable overrunning clutch and one-way controllable overrunning clutch

[0092] Two-way controllable overrunning clutch One-way controllable overrunning clutch (forward) One-way controllable overrunning clutch (reverse) Fully integrated (mode one) Enable Enable Reverse enable (mode 2) Disability Enable ...

Embodiment 3

[0094] This example Figure 4 Shown. The ordinary one-way overrunning clutch 220 in this embodiment is equivalent to the two-way controllable overrunning clutch 200 having only a forward enable mode (mode 4). Due to the power transmission characteristics of the one-way overrunning clutch, in this embodiment, the engine 100 A starter is needed to start the engine.

[0095] From the perspective of practical engineering applications, two points need to be pointed out in particular. The first point is that when the ordinary one-way clutch 220 is in the overtaking state for a long time, the transmission parts of the ordinary one-way clutch 220 will be worn out. If the wear is severe, it will cause failure. The second point is that the output of the engine 100 has torque fluctuations, and the ordinary one-way clutch 220 that can only transmit power in one direction may cause additional vibration, thereby affecting the stability of the power output of the system.

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Abstract

The invention relates to a hybrid power system with multiple power sources and multiple levels of speed ratios and a control method of the hybrid power system. The hybrid power system comprises an engine, a bidirectional controllable overrun clutch, a first motor, a second motor, a multi-speed transmission and a battery pack. One end of the bidirectional controllable overrun clutch is connected with an output shaft of the engine. The other end of the bidirectional controllable overrun clutch is connected with an output shaft of the first motor. A driving part of the multi-speed transmission is connected with the bidirectional controllable overrun clutch. A driven part of the multi-speed transmission is connected with an output shaft of the second motor. The battery pack supplies power to the first motor and the second motor. By means of switching of the modes of the bidirectional controllable overrun clutch and switching of gears of the multi-speed transmission, the multiple driving and energy recovery modes which the multiple power sources can be partially or overall involved in is realized. According to the hybrid power system, control is simplified, the structure is compact, sliding friction energy loss caused by the clutch is avoided, the efficiency of a whole vehicle is improved, the gear ratio of the system lowers the requirement for the performance of the first motor, the fuel economy of the engine is improved, and the energy-saving effect is enhanced.

Description

technical field [0001] The invention belongs to the technical field of electromechanical compound transmission system, especially the hybrid power transmission of motor vehicles, and specifically relates to a kind of hybrid power system with two-way controllable overrunning clutch, multiple power sources including engine and multi-stage speed ratio and its control method. Background technique [0002] A hybrid power system refers to a system in which two or more power sources drive a vehicle individually or jointly through a certain power coupling device. [0003] In the prior art, friction clutches (including dry and wet) or planetary gear mechanisms are commonly used as coupling devices for multiple power sources. Friction clutches only have on-off functions, and are mainly used in parallel hybrid systems. They have the disadvantages of difficult control, high requirements, and easy wear. Slip friction caused by frequent clutch on-off will also cause energy loss. The pl...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K17/02B60K17/06B60K6/26
CPCY02T10/92
Inventor 刘延伟赵克刚黄向东郭钟宁
Owner GUANGDONG UNIV OF TECH
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