Hybrid Electric Vehicle Powertrain

Abstract

The invention discloses a power system for a hybrid electric automobile. An output shaft of an engine is connected with a planet carrier; non-dead axle planet gears are arranged on the planet carrier, and are engaged with a sun gear and a gear ring; the sun gear and a transition gear are arranged coaxially; the transition gear is engaged with an output gear; the output gear is arranged on an output shaft of a first motor; a second external gear is arranged on the end part of the gear ring and is engaged with a first external gear; the first external gear and a speed reducer driving gear are arranged on an output shaft of a second motor; and the speed reducer driving gear is engaged with a speed reducer driven gear. According to the power system, the axial dimension and the radial dimension can be effectively reduced to ensure that the power system has a compact integral structure and a small and exquisite size; the power system contributes to distribution in a front engine chamber of the automobile; the using range is expanded; and the power system is also suitable for vehicles of which the front engine chambers have small space.

Description

technical field [0001] The invention belongs to the technical field of electric vehicles, in particular to a power system on a hybrid electric vehicle. Background technique [0002] Hybrid electric vehicle (hybridelectricvehicle, HEV) combines the characteristics of traditional vehicles and pure electric vehicles. It is currently recognized as the energy-saving vehicle with the most practical value and the most possible marketization. A typical model of HEV. [0003] As the power coupling mechanism of the hybrid HEV, the planetary gear mechanism of the third-generation Toyota Prius has the characteristics of multiple inputs and multiple outputs. Through the adjustment of the control strategy, it can realize independent driving of the engine, independent driving of the motor, joint driving of the engine and the motor, etc. The working mode realizes the best matching and intelligent switching of gasoline and electricity, and becomes the first choice of HEV power coupling mech...

AI Technical Summary

Problems solved by technology

[0020] 1) The first motor M1 is located in the planet carrier, the first motor M1 and the second motor M2 are separated on both sides of the ring gear 5, and the first motor M1 is interposed between the engine ICE and the second motor M2, so that the entire power system The axial dimension is relatively large, which is not conducive to the layout of the power system in the front cabin of the car, and will affect the range of use of the power system, especially for models with small space in the front cabin

[0021] 2) The deceleration and torque increasing device of the second motor M2 adopts a planetary gear mechanism, the structure is relatively complicated, the processing of parts is difficult, and the manufacturing and production are relatively difficult. the cost of

[0022] 3) The first external gear 6 is outside the circumference of the ring gear 5, and the radial size of the entire power system is relatively large, which makes it inconvenient to arrange the power system in the front engine room of the car, and also affects the use range of the power system, especially for the front Not suitable for models with small cabin space

[0023] 4) There are 13 gears that need to be processed inside the power coupler, which will increase the production cost of the power system, and the connection of the power system is prone to interference, and the transmission efficiency and carrying capacity are poor

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