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Auxiliary power unit (APU) controlling method for gas-electric hybrid system

A hybrid power system and control method technology, applied in the field of APU control, can solve the problems of engine firing, difficult throttle control, long time of speed regulation, etc., and achieve the effects of reducing up and down fluctuations, improving power generation efficiency, and fast speed regulation response

Active Publication Date: 2015-04-29
ZHENGZHOU YUTONG BUS CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to provide an APU control method for a gas-electric hybrid power system to solve the problems of the existing control methods, such as long time for speed regulation, difficult throttle control, and engine firing during shutdown

Method used

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  • Auxiliary power unit (APU) controlling method for gas-electric hybrid system
  • Auxiliary power unit (APU) controlling method for gas-electric hybrid system
  • Auxiliary power unit (APU) controlling method for gas-electric hybrid system

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Embodiment Construction

[0020] The present invention will be further introduced below in conjunction with the accompanying drawings and specific embodiments.

[0021] Such as figure 1 Shown is a structural diagram of an embodiment of an existing hybrid drive system. It can be seen from the figure that the system includes a coaxially arranged engine 1, an ISG motor 3 and a main motor 5, wherein the ISG motor 3 and the output shaft of the engine 1 are twisted The shock absorber 2 is connected by transmission, while the ISG motor 3 and the main motor 5 are connected by transmission through the clutch 4, and the main motor is directly connected to the driving axle to drive the whole vehicle. According to the working state of the clutch 4, the system can be divided into series mode and parallel mode. The series mode means that the clutch is in a disengaged state, and the main motor is the only driving component; the parallel mode means that the clutch is engaged, and the engine or the main motor is the dr...

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Abstract

The invention discloses an auxiliary power unit (APU) controlling method for a gas-electric hybrid system. In a series-connection high-speed generation mode and in a rotating speed tracking mode of a vehicle, an integrated starter generator (ISG) is controlled by rotating speed, and an engine is controlled by a throttle; in the series-connection high-speed generation mode, the target rotating speed of the ISG is the rotating speed for generation, and the throttle valve of the engine is preset; in the rotating speed tracking mode, the target rotating speed of the ISG is the current rotating speed of a main motor, and the throttle valve of the engine is zero. According to the APU controlling method for the gas-electric hybrid system, in the series-connection high-speed generation mode and in the rotating speed tracking mode, the ISG is controlled by rotating speed, speed adjusting response is quick especially during climbing, the hybrid system can quickly switch into the series-connection mode, then the engine and the main motor provide power at the same time, and the dynamic property of the vehicle is excellent; and during high-speed generation at the preset rotating speed, the ISG is controlled by rotating speed, and the engine is controlled by the preset throttle, so that up-down fluctuation of the rotating speed of the engine can be reduced, and generation efficiency is improved.

Description

technical field [0001] The invention relates to an APU control method of a gas-electric hybrid power system. Background technique [0002] The auxiliary power unit (APU) is mainly composed of the engine and the ISG motor. When controlling the APU of this type of gas-electric hybrid system, the following two control methods are mainly used: (1) Combination of engine speed control and ISG torque control; ( 2) Combination of engine throttle control and ISG torque control. For the first control method, due to the slow response of the engine speed control, the speed adjustment time in the speed following mode is long, and the vehicle cannot quickly enter the parallel mode; long. For the second control method, when the APU speed is adjusted, the throttle control is difficult, easy to overshoot, and the response is slow. In addition, during the engine shutdown process of the above two control methods, when the engine is cut off, the ISG quickly drags the engine back to stop at 0...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60W10/06B60W10/08B60W20/00
CPCB60W10/06B60W10/08B60W20/00B60W2710/0605B60W2710/081Y02T10/62
Inventor 岳淑彪陈慧勇苏常军杨学青李涛
Owner ZHENGZHOU YUTONG BUS CO LTD
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