Multi-Clutch Hybrid Powertrain Control for Mode Transition
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Solution Overview
Problem
There is a need for a vehicle control system that can seamlessly transition between series hybrid and parallel hybrid configurations, allowing for efficient energy transmission and propulsion modes.
Innovation Solution
A control system utilizing multiple clutch assemblies, including electromagnetic clutches, connected to a generator, transmission, and engine, with a controller managing their operational states to select between series hybrid, parallel hybrid, and conventional internal combustion engine modes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple clutch assemblies are used to enable transitions between series hybrid and parallel hybrid configurations, then the adaptability and versatility of the vehicle is improved, but the device complexity increases
Solution Approach 1:
The power transmission system is segmented into multiple independent clutch assemblies (first clutch assembly between engine and generator, second clutch assembly between generator and transmission, third clutch assembly between engine and transmission) that can be independently controlled. This segmentation allows the system to achieve multiple operational configurations (series hybrid, parallel hybrid, conventional mode) by selectively engaging or disengaging individual clutch assemblies, thereby providing adaptability without requiring a completely different system architecture for each mode.
2Ease of operation
If electromagnetic clutches are used for controlling rotational energy transmission, then the ease of operation and response time are improved, but the device complexity and manufacturing difficulty increase
Solution Approach 1:
Traditional mechanical clutch control mechanisms are replaced with electromagnetic clutches that can be actuated electrically. This substitution allows for more precise and rapid control of rotational energy transmission between powertrain components. The electromagnetic clutches provide instantaneous engagement and disengagement capabilities, improving the responsiveness of operational mode transitions, while the electrical control interface simplifies the overall control architecture compared to complex mechanical linkage systems.
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
Enables flexible operation by controlling the clutch assemblies to optimize energy transmission and propulsion, allowing the vehicle to efficiently operate in various hybrid modes, enhancing energy utilization and propulsion capabilities.
Implementation Method 1
A first clutch assembly (16) associated with a generator shaft (12) of a generator (10)... A second clutch assembly (34) associated directly or indirectly with a transmission shaft (42) of a transmission (30)... A third clutch assembly (26) associated with an engine shaft (24)... each comprise electromagnetic clutches
Data Source
AI summary
A first clutch assembly has an active state for transmitting rotational energy and an inactive state for not transmitting rotational energy. A generator has a generator shaft associated with the first clutch assembly. A second clutch assembly has an active state for transmitting rotational energy and an inactive state for not transmitting rotational energy. A transmission has a transmission shaft directly or indirectly associated with the second clutch assembly. A third clutch assembly has an active state for transmitting rotational energy and an inactive state for not transmitting rotational energy. An engine has an engine shaft associated with the third clutch assembly. A controller establishes an operational mode of the vehicle by controlling the states of the first clutch assembly, the second clutch assembly, and the third clutch assembly.