Multi-mode composite mixed power plant with three-gear automatic speed-changing module

Abstract

The invention discloses a multi-mode composite mixed power plant with a three-gear automatic speed-changing module. The multi-mode composite mixed power plant comprises an engine, an elastic damper, a first motor, a planetary coupler, a second motor and the three-gear automatic speed-changing module; the engine, the elastic damper, the first motor, the planetary coupler, the second motor and the three-gear automatic speed-changing module are coaxially mounted in sequence; a transmission shaft of the first motor and a transmission shaft of the second motor are hollow shafts, the transmission shaft of the first motor is connected with a planetary coupler first sun wheel, and an input shaft of the planetary coupler penetrates through the transmission shaft of the first motor to be connected with the elastic damper; the transmission shaft of the second motor is connected with a planetary coupler second sun wheel; and an output shaft of the planetary coupler penetrates through the transmission shaft of the second motor to be connected with the three-gear automatic speed-changing module. The multi-mode composite mixed power plant with the three-gear automatic speed-changing module has the advantages that transmission modes are richer, the oil-saving and electricity-saving performances are strong, the power is strong, the reliability is high, the cost is low, and the service life is longer.

Description

Technical field [0001] The invention relates to the field of hybrid power, in particular to a multi-mode compound hybrid power device containing a three-speed automatic transmission module. Background technique [0002] Vehicle emissions and energy consumption have become a worldwide problem. Therefore, hybrid vehicles with low emissions and low energy consumption have become one of the mainstream developments of the current automotive industry, especially with the continuous development of the plug-in hybrid vehicle industry. High fuel-saving rate, power-saving rate, higher reliability and lower cost have become the core constraints of this type of automobile industry. Therefore, more concise power plant design, richer drive modes, more reliability and lower loss The new mode switching method and the use of higher-speed and lightweight motors have become the best solution to the power system of plug-in hybrid vehicles. [0003] With the continuous advancement of urbanization and ...

AI Technical Summary

Problems solved by technology

[0004] For the first type of hybrid powertrain, it is barely suitable for urban traffic passenger cars with a maximum speed of less than 50Km / h, a vehicle weight of less than 20 tons, and a road gradient not greater than 10%. Passenger and freight vehicles for intercity traffic with a vehicle weight greater than 20 tons and a road gradient greater than 20% per hour are difficult to meet the driving and cost requirements

Taking a 25-ton passenger car as an example, if it meets the requirements of intercity traffic conditions, the maximum peak torque of the direct drive motor should not be lower than 4500Nm. If it is necessary to achieve this torque output, the volume, weight and cost of the direct drive motor are very alarming, especially serious When the high-speed section is driven by the engine alone at high speed, the high-speed rotation of the ISG motor and the direct drive motor will lead to a significant drop in drive efficiency, a sharp reduction in the life of the motor bearing, and a very high moment of inertia of the motor will cause damage to the rear axle assembly and the braking system of the vehicle. Serious harm

[0005] For the second type of hybrid powertrain, due to the cancellation of the ISG motor and the limitation of the chassis installation axial space, it uses a smaller power drive motor, and at the same time uses a high-power, high-torque multi-speed AMT gearbox, resulting in The efficiency of electric drive is low, and there are problems such as intermittent power shifting, long shifting time and shifting reliability, especially the ability to recover electric braking energy is weak, especially when the engine is driven alone, the drive motor is always in a random rotation state, resulting in reduced motor life and system efficiency

For the second hybrid powertrain, although it solves the driving power problem, its fuel saving rate and emission effect are not as good as the first hybrid powertrain

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