Hybrid Vehicle Electric Mode Switch Verification
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Solution Overview
Problem
Hybrid vehicles are often denied access to benefits reserved for pure electric vehicles since it cannot be guaranteed that the combustion engine will not be active, even though they primarily operate using an electric motor, leading to environmental and user perspective disadvantages.
Innovation Solution
A control system and switch arrangement that allows a hybrid vehicle to operate in an electric mode by requiring the vehicle to be in an off-state for a predetermined time before switching from hybrid mode to electric mode, ensuring the combustion engine is not used, and incorporating a visual indicator to verify the electric mode externally.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If hybrid vehicles are allowed to operate in electric mode with combustion engine disabled, then environmental benefits and access to low-emission zones improve, but reliability deteriorates because combustion engine cannot provide backup power when battery capacity is low
Solution Approach 1:
The system performs preliminary verification by checking if the vehicle has been in off-state for a predetermined period before allowing switch to electric mode. This preliminary action ensures that the driver has intentionally chosen electric mode rather than accidentally switching during operation, thereby maintaining reliability while enabling environmental benefits
2Ease of operation
If the switch to electric mode is allowed during vehicle operation, then ease of operation improves, but reliability deteriorates because mode switching may occur unintentionally during traffic control or operation
Solution Approach 1:
The system requires the vehicle to be in off-state for a predetermined time period before allowing mode switching. This preliminary condition ensures that mode selection is intentional and deliberate, preventing accidental switching during traffic control or vehicle operation while still allowing easy switching when the vehicle is parked and the driver has time to consider the choice
Data Source
AI summary
A control system, a switch and a control method for a hybrid vehicle, the vehicle operable in a hybrid mode where a combustion engine and an electric motor can be used, and in an electric mode where only the electric motor can be used. The control system includes a propulsion mode control module configured to control the vehicle to operate in one of the hybrid mode and the electric mode. The propulsion mode control module is further configured to verify that the vehicle has been in an off-state for a predetermined period of time before switching from the hybrid mode to the electric mode.