Clutch-free synchronous gear shifting control method and system of hybrid power system

A hybrid power system, clutch synchronization technology, applied in hybrid vehicles, motor vehicles, transportation and packaging, etc., can solve the problems of increased switching time, long power interruption time, high cost, etc., to reduce costs and reduce power interruption time Effect

Active Publication Date: 2020-10-30
江苏新能源汽车研究院有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] 1. The clutch is used, which increases the switching time and the power interruption time is long;
[00

Method used

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  • Clutch-free synchronous gear shifting control method and system of hybrid power system
  • Clutch-free synchronous gear shifting control method and system of hybrid power system
  • Clutch-free synchronous gear shifting control method and system of hybrid power system

Examples

Experimental program
Comparison scheme
Effect test

Example Embodiment

[0086] Example one:

[0087] Such as the above-mentioned shift control method, wherein,

[0088] Shifting force F=200N, making the engine close to zero torque mode,

[0089] The half cone angle of the synchronous ring cone is 7°, the locking angle is 51°,

[0090] Such as Figure 5 As shown, the joint tooth speed w=1000rpm, the gear sleeve speed 960rpm, the speed regulating motor regulates the engine speed, so that the joint tooth speed w decreases at a certain slope, when the joint tooth and the gear sleeve speed cross, the tooth sleeve displacement is basically unchanged. Rotational crossover occurs at 150ms, and the displacement of the gear sleeve changes greatly after the intersection of the rotating speeds of the engaging teeth and the gear sleeve. It shows that the speed control system actively controls the speed of the coupling gear to make it cross point with the speed of the gear sleeve. At this time, the synchronizer ring will open the shift opportunity window, and the gear...

Example Embodiment

[0091] Embodiment two:

[0092] The shifting force F is: F=150N, which makes the engine close to the zero torque mode,

[0093] The half cone angle of the synchro ring cone is 6°30’, the locking angle is 52°,

[0094] Such as Image 6 As shown, the joint tooth speed w=2000rpm and the gear sleeve speed 1960rpm. The speed regulating motor regulates the engine speed so that the joint tooth speed w decreases at a certain slope. When the joint tooth and the gear sleeve rotate speeds, the gear sleeve displacement is basically unchanged. Rotational crossover occurs at 160ms, and the displacement of the gear sleeve changes greatly after the intersecting point of the rotating speeds of the engaging teeth and the gear sleeve. By simulating the different angular relationships when the gear sleeve and the engaging teeth are engaged, gear shifting can be realized. It shows that the speed control system actively controls the speed of the coupling gear to make it cross point with the speed of th...

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PUM

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Abstract

The invention discloses a clutch-free synchronous gear shifting control method and system of a hybrid power system. The method comprises the following steps: S1, obtaining gear shifting requirements,S2, entering shift preparation, S3, when the rotating speeds are different, protecting a synchronous ring, under the action of a gear shifting motor, allowing a gear sleeve to move forwards, wherein when the gear sleeve makes contact with the synchronous ring, due to the fact that the rotating speed w1 of joint teeth is different from the rotating speed w2 of the gear sleeve, the synchronous ringbears friction torque of the joint teeth and shifting ring torque of the gear sleeve, the friction torque is larger than the shifting ring torque, and the gear sleeve cannot drive the synchronous ringto move and cannot penetrate through the synchronous ring to be combined with the joint teeth; S4, performing gear shifting after speed regulation; S5, engaging a new gear, recovering torque output,and S6, executing a new gear shifting cycle. The clutch-free synchronous gear shifting control system of the hybrid power system comprises an execution unit, an automatic transmission controller, a gear shifting motor, the hybrid power system and the synchronous ring, a clutch is prevented from being adopted during gear shifting, the cost is reduced, and the power interruption time is shortened.

Description

technical field [0001] The invention belongs to the technical field of gear shift control of a hybrid power system of a new energy vehicle, and in particular relates to a clutchless synchronous gear shift mechanism and a gear shift strategy of a new energy hybrid power system during hybrid power coupling and gear shifting. Background technique [0002] Hybrid electric vehicles use the characteristics of low-speed constant torque and high-speed constant power of the motor, and cooperate with the internal combustion engine. Through the switching of power coupling mode and gearbox speed ratio, the system power of the vehicle can be used most effectively for various driving scenarios, improving Fuel economy and reduced emissions, combined with the dual advantages of power and economy, is a better choice at this stage. [0003] Most hybrid coupling mechanisms add motors to the structure of traditional DCT, AT and CVT gearboxes, such as the Geely Lynk & Co P2 / P2.5 system, BYD P2 a...

Claims

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Application Information

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IPC IPC(8): B60W10/11B60W10/06B60W10/08B60W30/19B60W20/00
CPCB60W10/06B60W10/08B60W10/11B60W20/00B60W30/19B60W2510/0638B60W2520/10Y02T10/62
Inventor 邹大庆孙畅宋永亮石放辉蒋宇翔夏乐春沈双达刘汪洋陈曦林联杰
Owner 江苏新能源汽车研究院有限公司
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