Hybrid Vehicle Power Modules for Fuel-Efficient Engine Switching
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Solution Overview
Problem
Existing hybrid systems in large-sized commercial vehicles operate engines according to preset logic, leading to inevitable low efficiency and high fuel consumption, especially in sections where the engine is not optimally suited for the required output.
Innovation Solution
A hybrid system with multiple engine power generation modules, each with small displacement, is controlled by a unit that derives an overall efficiency map from individual engine maps to selectively operate modules based on vehicle requirements, optimizing efficiency and reducing fuel consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a single large-displacement engine is operated according to preset logic, then the vehicle can be driven with simple control, but the engine efficiency deteriorates in sections not suited for the required output
Solution Approach 1:
The patent divides a single large-displacement engine into multiple small-displacement engine power generation modules. Each module can be independently controlled to operate in its optimal efficiency range, resolving the contradiction between control simplicity and engine efficiency. The control unit selectively operates appropriate number of modules based on required output, ensuring each operating module works at high efficiency while maintaining relatively simple control logic.
2Device complexity
If preset logic is used for engine operation, then the control system remains simple, but fuel consumption increases in low efficiency sections
Solution Approach 1:
By segmenting the engine system into multiple independent power generation modules, the patent enables selective operation of modules based on required output. This allows the control system to maintain simplicity while avoiding operation in low efficiency sections, as each module can be independently switched on or off to match the optimal operating range requirements.
Solution Approach 2:
The patent changes the operational parameters by operating multiple small-displacement engines at their optimal efficiency points rather than forcing a large-displacement engine to operate across a wide range including inefficient zones. The control unit dynamically adjusts the number of operating modules based on required output, ensuring parameter optimization for fuel efficiency.
3Power
If a large-displacement engine is used to meet high output requirements, then the power demand can be satisfied, but the engine operates in low efficiency sections during partial load
Solution Approach 1:
The patent segments the power generation function into multiple small-displacement engine modules. When high output is required, multiple modules operate simultaneously, each at their optimal efficiency point. When partial load is required, fewer modules are operated, keeping each running module within its efficient operating range. This resolves the contradiction between meeting power demands and maintaining engine efficiency.
Solution Approach 2:
The patent combines multiple small-displacement engine power generation modules to achieve the total required output. By merging the output of multiple efficiently operating small engines, the system matches the power capability of a single large engine while maintaining superior fuel efficiency across all load conditions.
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 system ensures optimal engine operation by connecting efficient sections across modules, minimizing fuel consumption and maintaining engine durability through strategic module switching.
Implementation Method 1
a generator driven by the engine to generate power
Implementation Method 2
a battery configured to store power output from the plurality of the engine power generation modules
Data Source
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AI summary
A hybrid system for a vehicle having an engine and a driving motor includes a plurality of engine power generation modules for generating power with an operation of the engine, a battery for storing power output from the engine power generation modules, a plurality of driving modules for driving the driving motor for driving wheels of the vehicle by the power output from the engine power generation modules or the battery, and a control unit for selectively controlling operations of the engine power generation modules and the driving modules to match a required output of the vehicle.