Two-Speed Electric Drive Module for Hybrid Vehicles
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Solution Overview
Problem
Hybrid powertrains for four-wheel drive vehicles are expensive and difficult to package due to specialized componentry and control systems, necessitating a cost-effective and compact alternative powertrain solution.
Innovation Solution
An electric drive module with a two-speed transmission system that includes an electric motor, a reduction unit, and a differential assembly, allowing for independent or combined operation with conventional powertrains, enabling the use of conventional components and reducing packaging complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If hybrid powertrains with specialized componentry are used in four-wheel drive vehicles, then four-wheel drive capability is achieved, but cost and packaging difficulty increase significantly
Solution Approach 1:
The patent combines the electric motor, transmission, and differential assembly into a single integrated electric drive module. This merging of previously separate components into one compact unit enables four-wheel drive capability while significantly reducing packaging difficulty and vehicle cost compared to traditional hybrid powertrain configurations.
2Power
If traditional hybrid powertrain configurations are used, then power delivery is achieved, but cost increases due to specialized componentry
Solution Approach 1:
The electric drive module is designed as a universal platform that can be applied to various vehicle types and configurations. By creating a multi-functional component that integrates motor, transmission, and differential functions, the system achieves power delivery capabilities while reducing manufacturing cost through component consolidation and standardized production.
Solution Approach 2:
The integration of multiple functions into a single modular unit reduces the total number of specialized components required, thereby lowering manufacturing costs while maintaining power delivery performance.
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
The electric drive module provides a compact, cost-effective solution for four-wheel drive vehicles by enabling the use of conventional powertrains and allowing for efficient torque delivery to all wheels, reducing the need for specialized components and packaging.
Implementation Method 1
an electric motor having an output shaft
Implementation Method 2
A reduction unit includes a second input member being driven by the first output member and has a second output member being driven at a reduced speed relative to the second input member
Implementation Method 3
A differential assembly has an input driven by said second output member, a first differential output driven by said differential assembly and adapted to drive a left wheel, and a second differential output driven by said differential assembly and adapted to drive a right wheel
Data Source
AI summary
An electric drive module for a motor vehicle includes an electric motor, a first input member, a first output member and a two-speed module selectively drivingly interconnecting the first input member and the first output member at one of two different drive ratios. A reduction unit includes a second input member being driven by the first output member and has a second output member being driven at a reduced speed relative to the second input member. A differential assembly has an input driven by said second output member. A first differential output drives a first output shaft, and a second differential output drives a second output shaft.