Hybrid drive system and vehicle

By employing a four-axis planetary gear transmission mechanism that connects the electric motor and the internal combustion engine in reverse in a hybrid drive system, combined with a linkage shifting component and intermediate shaft design, the problem of complex axial structure in existing systems is solved, achieving compact and efficient transmission function and flexible drive modes, suitable for a variety of vehicles.

CN117320908BActive Publication Date: 2026-07-07MERCEDES BENZ GRP
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
MERCEDES BENZ GRP
Filing Date
2022-04-12
Publication Date
2026-07-07

AI Technical Summary

Technical Problem

Existing hybrid drive systems have complex axial structures and require a lot of space, making it difficult to achieve compact and efficient transmission functions.

Method used

The hybrid drive system employs two planetary gear sets and two cylindrical gear sub-transmissions. By connecting the electric motor and the internal combustion engine in reverse, a simple and compact structure is achieved using a four-axis planetary gear transmission mechanism. The gear design is optimized through linkage shifting components and intermediate shafts, allowing the electric motor to run in reverse and the internal combustion engine and electric motor to have the same transmission ratio in intermediate gears.

Benefits of technology

It achieves a compact structure over a wide speed ratio range, improves the efficiency and energy utilization of the hybrid drive system, supports pure electric operation and motor power generation functions, and adapts to the drive needs of different vehicles.

✦ Generated by Eureka AI based on patent content.

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  • Figure CN117320908B_ABST
    Figure CN117320908B_ABST
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Abstract

The present invention relates to a hybrid drive system (1) having an internal combustion engine (2) and an electric motor (3) and a transmission (4) including a first cylindrical gear sub-transmission (B) and a second cylindrical gear sub-transmission (A) and a four-axis planetary gear transmission mechanism (8), the cylindrical gear sub-transmissions being driven via at least one intermediate shaft (12), the four-axis planetary gear transmission mechanism having a first planetary gear set (8.1) including a first center gear (8.1.1), a first planetary gear carrier (8.1.2) and a first ring gear (8.1.3) and a second planetary gear set (8.2) including a second center gear (8.2.1), a second planetary gear carrier (8.2.2) and a second ring gear (8.2.3), wherein the first ring gear (8.1.3) engages or is engageable with the crankshaft (5) of the internal combustion engine (2), wherein the first center gear (8.1.1) .1) Permanently anti-rotationally connected to the second gear ring (8.2.3), and the rotor of the motor (3) is anti-rotationally engaged or operable to the second gear ring (8.2.3), wherein the first planetary gear carrier (8.1.2) is permanently anti-rotationally connected to the second planetary gear carrier (8.2.2) and the first input shaft (9) of the first cylindrical gear sub-transmission (B) rotatable about the main rotation axis is anti-rotationally connected to the second planetary gear carrier (8.2.2), and the second input shaft (10) of the second cylindrical gear sub-transmission (A) rotatable about the main rotation axis is anti-rotationally connected to the second center gear (8.2.1), wherein the first and second cylindrical gear sub-transmissions (B, A) each have exactly one cylindrical gear pair (11, 14) and are provided with a linkage shifter (SK) for anti-rotationally connecting two of the four shafts of the planetary gear transmission mechanism (8).
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