Multi-mode hybrid power system based on single planet row and control method thereof

Abstract

The invention discloses a multi-mode hybrid power system based on a single planet row and a control method thereof. The multi-mode hybrid power system comprises an engine, a vehicle controller, an energy flow dividing device, a driving mechanism, a first motor and a second motor. The first motor and the second motor are in transmission connection with the energy flow dividing device, the engine isconnected with a rotary shaft of a planet carrier through a first clutch, and the first motor is connected with a rotary shaft of an inner gear ring through a first gear pair. The rotary shaft of theinner gear ring is connected with the driving mechanism, and the second motor is connected with a rotary shaft of a sun wheel through a second gear pair. A second clutch is connected with a rotary shaft of the second motor, the vehicle controller enables the first clutch, the second clutch and / or a third clutch to be connected or disconnected, and the second clutch controls the rotary shaft of the second motor to rotate or lock. The multi-mode hybrid power system is simple in structure, driving can be conducted in any one of modes such as single motor, double motors, engine and hybrid, the efficiency of the system is improved, demands of torque of the driving motors are reduced, and the cost of the system is lowered.

Description

technical field [0001] The invention relates to the technical field of automobile control, in particular to a multi-mode hybrid power system based on a single planetary row. The present invention also relates to a control method comprising the above-mentioned multi-mode hybrid power system based on a single planetary row. Background technique [0002] With the gradual depletion of primary energy and the deteriorating environment, new energy vehicles with excellent energy saving and emission reduction performance have gradually become the development trend of the automotive industry. Among them, the power system of new energy vehicles is divided into three types: hybrid, pure electric and fuel cell. a technical route. [0003] In the power system of new energy vehicles, since the hybrid technology route does not rely on charging facilities, the additional cost of the vehicle is less on the premise of greatly reducing the fuel consumption of the vehicle, and it has been devel...

AI Technical Summary

Problems solved by technology

[0004] In the existing hybrid power system, when the speed of the vehicle exceeds a certain limit, the rotation speed of the generator will appear negative, which will lead to the phenomenon of power cycle and greatly reduce the efficiency of the system. In order to solve the above problems, by adding four A wet clutch and brake can realize two working modes of input split and compound split and four engine direct drive speed ratios. However, the structure of the hybrid power system is complicated, and at the same time, the torque requirement for the driving motor is high, which makes the cost of the system higher

Images