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Electromechanical power coupling mechanism of automobile oil electricity hybrid power system

An oil-electric hybrid and power coupling technology, which is applied to the arrangement of multiple different prime movers of hybrid vehicles, general power plants, electric vehicles, etc. issues such as performance, cost, size and weight

Active Publication Date: 2009-05-06
CHONGQING CHANGAN AUTOMOBILE CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But this system has a big disadvantage: the engine cannot be turned off when the vehicle is running, because if the engine does not output drive torque and only the motor outputs drive torque alone, the drive torque will be transmitted to the engine after passing through the planetary gear mechanism. A reverse torque on the engine shaft makes the engine reverse, which is not allowed, therefore, it does not have the function of pure electric drive
In order to achieve the above functions, the usual design is to add a starter motor to the system, which increases the complexity, cost, volume and weight of the system

Method used

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  • Electromechanical power coupling mechanism of automobile oil electricity hybrid power system
  • Electromechanical power coupling mechanism of automobile oil electricity hybrid power system
  • Electromechanical power coupling mechanism of automobile oil electricity hybrid power system

Examples

Experimental program
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Effect test

Embodiment 1

[0048] The inventor found through analysis that the negative torque generated by the engine shaft on the planet carrier shaft C can be weakened or counteracted by the moment of inertia of the sun gear shaft S and the motor. Depend on Figure 5 It can be seen that before starting, the rotation speed of the sun gear shaft S is higher than the rotation speed of the planet carrier shaft C. Therefore, when the clutch 6 is coupled, the sun gear shaft S tends to act a positive torque on the planet carrier shaft C. This positive torque is the same as The reverse torque generated by the ring gear shaft R is generated at the same time, and the direction is opposite, and the effects on the planet carrier C cancel each other. In order to achieve the purpose of complete offsetting, the present invention conducts the following derivation according to the principle of momentum moment conservation before and after clutch 6 is coupled:

[0049] Suppose the speed of the sun gear shaft S is n ...

Embodiment 2

[0067] However, in reality, it is not easy to ensure that equation (4) in the above example is fully established. If equation (4) does not hold, that is

[0068] J R Z R ≠ J S Z S

[0069] Then when the clutch 6 is coupled, the moment of inertia of the engine shaft will generate a negative impact torque on the planet carrier shaft c. In this case, the present invention adopts the following two measures to solve the problem.

[0070] First, a torque-limiting clutch is used to limit the peak value of the impact torque generated when the three shafts of the planetary gear mechanism are locked, so that the unstable impact torque can be changed into a limited, presettable, stable torque. Because the coupling of the clutch 6 is the cause of the impact torque, the greater the coup...

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Abstract

The invention relates to an electromechanical power coupling mechanism of an automobile fuel-electric hybrid power system, at least comprising an engine, a motor, a motor controller and a planetary gear mechanism. A gear ring shaft R and a solar gear shaft S of the planetary gear mechanism are used as moment input shafts and respectively connected with an engine shaft and a motor shaft; and a planetary carrier shaft is used as a moment output shaft and connected with an input shaft of a gear box. Aiming at realizing electric-electric driving and starting the engine in running, a unidirectional clutch is arranged on the engine shaft, a moment-limiting clutch is arranged between the solar gear and the gear ring, and simultaneously a calculation equation of a coupling moment Q and an input torque T of the motor is given when the moment-limiting clutch is coupled so as to control the size of the Q and the T of the engine starting, thus eliminating negative shock torque of a driving shaft of a vehicle and keeping the smooth running of the vehicle.

Description

technical field [0001] The invention relates to an automobile oil-electric hybrid power system. Specifically, it is an electromechanical power coupling mechanism for an automobile gasoline-electric hybrid system. Background technique [0002] In the prior art, U.S. Patent 6,569,054 discloses a parallel oil-electric hybrid power system, such as the image 3 As shown, the electromechanical coupling mechanism of the system is mainly composed of an engine 1 , a motor 2 , a set of planetary gear mechanism 21 , an electromagnetic clutch 36 and a gearbox 4 . The sun gear shaft S and the ring gear shaft R of the planetary gear mechanism 21 are used as torque input shafts, and its planetary carrier shaft C is used as a torque output shaft. The torque input shafts S and R are respectively connected to the shafts of the engine 1 and the motor 2, and the torque output The shaft C is connected via the gearbox 4 to the drive shaft of the wheels 5 . The function of the planetary gear mec...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B60K6/365B60K6/40B60K6/48B60W10/02B60W10/08
CPCY02T10/6221Y02T10/62
Inventor 段志辉章玲玲
Owner CHONGQING CHANGAN AUTOMOBILE CO LTD
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