Combined Drive System with Mechanical Through-Drive
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Solution Overview
Problem
Current purely electric vehicles face limitations in range due to high battery costs and weight, which restricts their practicality for daily use and extended trips, while traditional hybrid vehicles suffer from inefficiencies in energy conversion and increased vehicle weight.
Innovation Solution
A combined drive system integrating a smaller electric motor and a combustion engine with a mechanical through-drive, where the combustion engine directly powers the vehicle via a mechanical connection, eliminating the need for double energy conversion and optimizing efficiency, and using a gear mechanism with fewer translation stages to reduce weight and space requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If high power batteries are used to extend the range of purely electric vehicles, then the range is improved, but the vehicle weight and cost increase significantly
Solution Approach 1:
The drive system is segmented into two independent power sources: a combustion engine and an electric motor. Each component operates independently to provide propulsion, eliminating the need for a single large battery system while extending range through mechanical power addition.
Solution Approach 2:
The patent combines a combustion engine and electric motor into a unified drive system where both power sources can operate simultaneously or independently. This merging allows the vehicle to achieve extended range without requiring high-capacity batteries, as the combustion engine provides additional mechanical power directly.
2Duration of action of moving object
If a combustion engine is added to extend the range of electric vehicles, then the range is improved, but the vehicle weight increases
Solution Approach 1:
The powertrain is divided into separate combustion engine and electric motor components, each optimized for specific operating conditions. This segmentation allows the combustion engine to be sized appropriately for range extension without requiring oversized batteries, reducing overall system weight.
Solution Approach 2:
The patent replaces the electrical energy conversion path with a direct mechanical power transmission path. Instead of converting combustion energy to electrical energy and back to mechanical energy, the combustion engine directly drives the wheels through mechanical transmission, eliminating energy conversion losses and reducing the need for heavy battery systems.
3Adaptability or versatility
If double energy conversion is used in hybrid vehicles, then the vehicle can operate in multiple modes, but the energy efficiency decreases
Solution Approach 1:
The patent implements a mechanical through-drive system where the combustion engine directly transmits mechanical power to the wheels without electrical conversion. This mechanical substitution eliminates the energy losses associated with converting combustion energy to electrical energy and back to mechanical energy, significantly improving overall energy efficiency while maintaining multiple operating modes.
Solution Approach 2:
The drive system dynamically switches between different power sources and transmission paths based on operating conditions. The combustion engine can directly drive the wheels through the mechanical transmission system, or the electric motor can provide assistance or sole propulsion, allowing optimal energy efficiency in each operating mode without requiring double energy conversion.
4Speed
If complex gear mechanisms with multiple translation stages are used, then the rotation speed adaptation is improved, but the device complexity and weight increase
Solution Approach 1:
The transmission system is segmented into distinct functional stages: the combustion engine connects to the transmission input, and the electric motor connects to the transmission output. This segmentation allows for a simpler gear mechanism with fewer translation stages, reducing device complexity and weight while maintaining effective rotation speed adaptation through the distributed power architecture.
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 approach enhances fuel efficiency, reduces emissions, and extends the vehicle's range by utilizing a smaller, lighter powertrain, improving NVH behavior and reducing the overall weight and cost of the vehicle while maintaining efficient operation.
Implementation Method 1
an electric motor with 186 KW and has a total battery capacity of 53 kWh
Implementation Method 2
a small combustion engine which drives a generator with which the batteries can be recharged
Implementation Method 3
a small combustion engine which drives a generator with which the batteries can be recharged
Data Source
AI summary
A motor vehicle comprises a primary drive machine with a primary drive shaft for receiving or outputting power, a secondary drive machine with a secondary drive shaft for outputting power, and a secondary torque transmission device having an input side and an output side. A torque initiated by the input side and discharged by the output side can be influenced by the secondary torque transmission device. The vehicle further comprises an energy storage device and an output device which supplies the power output to the vehicle. The primary drive machine can be operated in a first operating state in which power is output by the primary drive shaft, and a second operating state in which power is received by the secondary drive shaft via the primary drive shaft and said power can be stored as energy in the energy storing device.