Hybrid Power Module With Planetary Gear Extraction
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Solution Overview
Problem
Current hybrid power modules for vehicles are inadequate in optimizing operating points for internal combustion engines and motors, leading to insufficient speed and torque during high-speed and low-speed driving, and result in significant rotational losses due to inefficient use of planetary gear mechanisms.
Innovation Solution
A hybrid power module with a hybrid transmission system that includes two planetary gear mechanisms and three clutches, allowing for multiple power transmission paths and modes, such as purely electric, internal combustion engine, hybrid drive, and recovery charging, by selectively engaging and disengaging the clutches to optimize power distribution and reduce rotational losses.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of energy
If a planetary gear mechanism is used in the hybrid transmission, then the transmission achieves small mass, small size, high transmission ratio, high bearing capacity, smooth transmission, and high transmission efficiency, but the motor driving the planetary gear mechanism causes large rotational losses when components not used for power transmission rotate together
Solution Approach 1:
The patent extracts and isolates the power transmission path from the planetary gear mechanism by using a one-way clutch to allow certain components (sun gear or ring gear) to remain stationary when not needed for power transmission. This prevents unnecessary rotational losses while maintaining the compact structure of the planetary gear mechanism.
2Adaptability or versatility
If only one gear is provided for the internal combustion engine and motor, then the transmission structure is simplified, but the operating point of the internal combustion engine or motor cannot be optimized and the vehicle cannot provide sufficiently high speed during high-speed driving or enough torque during low-speed driving
Solution Approach 1:
The patent makes the planetary gear mechanism multi-functional by enabling it to operate in different modes (direct drive, reduced gear, reversed gear) through the one-way clutch mechanism. This allows a single planetary gear mechanism to provide multiple gear ratios and adapt to different driving conditions, optimizing the operating points of both the internal combustion engine and motor while maintaining relatively simple structure.
3Use of energy by moving object
If the internal combustion engine is disconnected from the hybrid transmission during city driving, then fuel economy is improved by relying on only one motor, but the motor must drive rotating parts in the hybrid transmission that are not used for power transmission, causing large rotational losses
Solution Approach 1:
The patent extracts the unnecessary rotating components from the power transmission path during electric-only operation by using the one-way clutch to lock the sun gear or ring gear in place. This allows the motor to drive only the necessary components, eliminating rotational losses from idle components while maintaining the ability to disconnect the internal combustion engine for improved fuel economy during city driving.
Data Source
Figure 1
AI summary
The present invention relates to a hybrid power module, comprising a hybrid transmission, a first motor (4), and a second motor (8), wherein the hybrid transmission comprises a transmission input shaft (2) connected to an internal combustion engine of the vehicle, a transmission output shaft (13), a first planetary gear mechanism (3) connected to the transmission input shaft, and a second planetary gear mechanism (7) connected to the transmission output shaft, wherein the transmission input shaft is rotationally fixedly connected to a first ring gear, power is transmitted between the first motor and a first sun gear, power is transmitted between the second motor and a second sun gear, and the transmission output shaft is rotationally fixedly connected to a second planetary carrier, wherein providing a first clutch (12) which is capable of engaging a second ring gear and a transmission housing, a second clutch (5) which is capable of engaging a first planetary carrier and the second ring gear, and a third clutch (6) which is capable of engaging the first planetary carrier and the second planetary carrier. The present invention further relates to a vehicle comprising the above-mentioned hybrid power module.