Power system of extended-range type electric vehicle adopting combination of double clutch and planetary gears

Abstract

The invention discloses a power system of an extended-range type electric vehicle adopting a combination of a double clutch and planetary gears. The power system comprises an internal combustion engine, a planetary gear system, a first motor, a second motor and the double clutch. The planetary gear system comprises a planetary carrier, the planetary gears, a gear ring and a sun wheel. An output shaft of the internal combustion engine is connected with the planetary carrier. A rotor of the first motor is connected with the gear ring. The sun wheel is connected with one end of a transmission shaft, and the other end of the transmission shaft is connected with an input disc of the double clutch. A rotor of the second motor is connected with the input disc of the double clutch. The output end of a first clutch part of the double clutch is provided with a first driving gear, and the output end of a second clutch part of the double clutch is provided with a second driving gear. The first driving gear is meshed with a first driven gear. The second driving gear is meshed with a second driven gear. The first driven gear and the second driven gear are arranged on a power output shaft.

Description

technical field [0001] The invention relates to the field of electric vehicles. Background technique [0002] With the increasing global energy shortage and environmental pollution, automobiles, one of the main terminals of energy consumption and one of the main sources of harmful gas emissions, have become the focus of energy saving and emission reduction. It is against this background that hybrid electric vehicles and pure electric vehicles The next came into being. [0003] The hybrid electric vehicle mainly uses the internal combustion engine as the power source. Through the hybrid functions of the internal combustion engine idling stop, braking energy recovery, low-speed pure electric driving, driving power generation, driving power assistance, and independent driving of the internal combustion engine, the internal combustion engine can work according to the actual operation of the vehicle. It can be flexibly adjusted and controlled to keep working in the area with the...

AI Technical Summary

Problems solved by technology

For example, some solutions are driven by electric motors at low speeds and parallel drive of the power system at high speeds, but this cannot ensure that the internal combustion engine always works in the optimum efficiency zone, and requires the use of two dual-clutch devices, which is expensive and expensive, and the internal combustion engine cannot Power output through second gear

There are also solutions that can be driven by the motor when the speed is low or the efficiency of the internal combustion engine is low, and the internal combustion engine can participate in the drive when the internal combustion engine is high-speed, rapid acceleration or constant speed and the efficiency of the internal combustion engine is high, but it cannot guarantee that the internal combustion engine always works in the best efficiency zone, and There is only one gear, which requires high torque and maximum speed of the motor, and the transmission efficiency of the power system is low

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