Hybrid Powertrain Layout With Overlapping Belt and Generator
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional hybrid powertrains face challenges in reducing installation space in engine compartments due to the limited space required for internal combustion engines and generators, necessitating complex space-saving measures.
Innovation Solution
The hybrid powertrain design incorporates a single toothed chain or spur gear stage with a dual-mass flywheel and centrifugal pendulum, and arranges the belt transmission parallel or overlapping with the internal combustion engine, eliminating the need for an electric-side intermediate gear and using a direct combustion and electric input stage for efficient torque transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the generator is coupled to the internal combustion engine via a direct connection or single gear stage, then the installation space in the engine compartment is reduced, but the space required for the units increases due to conventional design limitations
Solution Approach 1:
The patent combines the generator and internal combustion engine into a single integrated unit, where the generator is arranged in axial overlap with the engine. This merging of functions into one compact assembly reduces the overall space requirement compared to separate conventional designs.
Solution Approach 2:
The generator is positioned within the axial extension of the internal combustion engine, with the generator shaft arranged parallel to and in axial overlap with the combustion shaft. This nested arrangement allows one component to occupy the same radial space as another, effectively reducing the total volume required.
2Area of stationary object
If complex space-saving measures are taken to reduce installation space, then the installation space is reduced, but the device complexity increases
Solution Approach 1:
The patent merges the generator and internal combustion engine into a single integrated assembly with shared mounting structures and aligned shafts. This combination eliminates the need for complex separate mounting arrangements and intermediate transmission components, achieving space savings through straightforward integration rather than complex measures.
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 configuration reduces radial installation space, increases efficiency, and allows for a more compact hybrid powertrain with reduced carbon dioxide emissions and hazardous substance emissions, while maintaining efficient torque output and energy conversion.
Implementation Method 1
a belt transmission (13) configured to variably translate a torque of the combustion shaft
Data Source
AI summary
A hybrid powertrain includes an output shaft, a combustion power section for providing a first torque, an electric power section for providing a second torque, and an output transmission for transmitting the first torque between the combustion power section and the output shaft and transmitting the second torque between the electric power section and the output shaft. The combustion power section includes an internal combustion engine with a combustion shaft for outputting the first torque, a generator with a generator shaft for converting the first torque into electric energy, and a variable belt transmission for variably translating the first torque. The belt transmission includes a combustion-side cone pulley pair with a first axially movable pulley arranged on a generator shaft side, an output-side cone pulley pair with a second axially movable pulley, and a belt for variably torque-transmittingly connecting the combustion-side cone pulley pair to the output-side cone pulley pair.