Hybrid Powertrain Motor Nesting in Transmission
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Solution Overview
Problem
Existing hybrid powertrain systems face challenges in integrating a motor with a double clutch transmission, as the motor's placement between the engine and transmission increases overall length, making it difficult to mount, especially in vehicles with longer transmissions, which hampers fuel efficiency and convenience.
Innovation Solution
A hybrid powertrain design where the motor is positioned within the speed change gear, parallel to the input and output shafts, forming a V-shape configuration, allowing the motor to be integrated without increasing the engine and transmission's length, and equipped with a motor-driven gear that is tooth-engaged with the motor-driving gear, enabling efficient power transmission and shifting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the motor is disposed between the engine and the transmission, then the hybrid powertrain can be implemented, but the overall length of the engine and transmission increases
Solution Approach 1:
The motor is nested within the transmission housing space, specifically utilizing the area between the input shaft and output shaft. The motor's stator is coupled to the transmission case while the rotor is positioned between the input and output shafts, allowing the motor to be housed within the existing transmission boundaries rather than adding external length.
Solution Approach 2:
Instead of arranging components in a linear sequence along the longitudinal axis (engine-motor-transmission), the patent repositions the motor in a transverse dimension within the transmission housing. The motor shaft extends radially between the input and output shafts, utilizing the radial space rather than longitudinal space, thereby maintaining compact overall length.
2Adaptability or versatility
If the motor is disposed between the engine and the transmission, then hybrid powertrain functionality is achieved, but mounting convenience deteriorates
Solution Approach 1:
The motor is nested within the transmission housing, utilizing existing structural boundaries. The stator couples to the transmission case and the rotor positions between standard transmission components (input and output shafts), allowing the motor to be integrated into the existing transmission assembly without requiring separate mounting space or complex external support structures.
3Loss of energy
If the motor shaft is tooth-engaged with gears, then power transmission efficiency is improved, but the complexity of the speed change gear increases
Solution Approach 1:
The motor shaft serves multiple functions: it acts as both the rotor assembly and the input shaft for the speed change gear mechanism. The motor shaft is equipped with drive gears that directly engage with the speed change gear, eliminating the need for separate coupling mechanisms and reducing overall system complexity while maintaining efficient power transmission.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This design enhances fuel efficiency by allowing the motor to be mounted conveniently regardless of the engine and transmission length, improving power transmission efficiency and reducing the overall length of the powertrain, thus enhancing the vehicle's fuel economy and mounting convenience.
Implementation Method 1
a motor-driven gear of which a rotational force is restricted, and a motor that may have a motor-driving gear at an end of a motor shaft to be tooth-engaged with the motor-driven gear
Data Source
AI summary
A hybrid powertrain for a vehicle may include a first input shaft that may be connected with a first clutch and receives power from an engine, a second input shaft that may be connected with a second clutch and receives the power from the engine, an output shaft that may be aligned in parallel with the second input shaft and has a motor-driven gear of which a rotational force may be restricted, and a motor that has a motor-driving gear at an end of a motor shaft to be tooth-engaged with the motor-driven gear.