A hybrid transmission

CN117002247BActive Publication Date: 2026-05-26XIAMEN NEVC ADVANCED ELECTRIC POWERTRAIN TECH INNOVATION CENT
View PDF 4 Cites 0 Cited by

Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
XIAMEN NEVC ADVANCED ELECTRIC POWERTRAIN TECH INNOVATION CENT
Filing Date
2022-04-28
Publication Date
2026-05-26

AI Technical Summary

Technical Problem

Existing hybrid transmissions suffer from problems such as low transmission efficiency, high cost, uneven shifting due to power interruption, and low efficiency of the electric motor. In particular, in series-parallel hybrid structures, the transmission efficiency of engine output torque is low, while the requirements for electric motor torque and speed are high, which increases the fuel consumption and manufacturing cost of the vehicle.

Method used

The design employs an engine, two motors, and two pairs of synchronizers. Gear shifting is achieved by controlling the alternating drive of the engine and motors. The parallel shaft gear transmission mechanism simplifies the shifting mechanism and reduces the use of clutches. The two pairs of synchronizers enable efficient and low-cost gear shifting.

Benefits of technology

It achieves efficient gear shifting, reduces energy loss and overall vehicle fuel consumption, simplifies gear shifting operations, reduces manufacturing costs, improves vehicle acceleration performance and fuel economy, avoids power interruption, expands the high-efficiency range of motor operating conditions, and reduces the technical requirements of the motor.

✦ Generated by Eureka AI based on patent content.

Smart Images

  • Figure CN117002247B_ABST
    Figure CN117002247B_ABST
Patent Text Reader

Abstract

This invention discloses a hybrid power transmission, comprising an engine, a first motor, a second motor, a first synchronizer, a second synchronizer, and parallel input and output shafts. The engine is connected to the input shaft, which is equipped with the first synchronizer. When the first synchronizer is engaged in one gear, the input shaft interacts with gear G1; when the first synchronizer is engaged in the other gear, the input shaft interacts with gear G2. The output shaft is equipped with the second synchronizer, which can selectively engage with gears G1 and G3 to achieve output. The output shaft is also connected to gear G2 via gear G1 to achieve output. In this system, the engine has three gears, allowing for uninterrupted gear shifting in HEV mode; one motor has two gears, and the other motor has an intermediate gear ratio, allowing for uninterrupted gear shifting in EV mode; in EV mode, both motors can be driven simultaneously, reducing motor torque and power requirements, as well as cost and weight.
Need to check novelty before this filing date? Find Prior Art