Hybrid Vehicle Display Visualizing Max Load for Electric Mode
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Solution Overview
Problem
Hybrid vehicle drivers face difficulty in maintaining purely electric driving mode due to the relatively low power of electric machines compared to internal combustion engines, and the restart point is not constant, making it challenging to estimate when the internal combustion engine will be activated.
Innovation Solution
A display device for hybrid vehicles that provides an additional visualization of the maximum load requirement, allowing drivers to influence the restart point by activating an operating mode such as E mode, which increases the maximum load that can be drawn, with visual and audible signals to inform the driver of the change in operating mode.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Duration of action of moving object
If the electric machine power is increased to extend electric-only driving range, then the electric driving performance is improved, but the vehicle weight and cost increase
Solution Approach 1:
The patent implements dynamic adjustment of the restart threshold based on driver behavior patterns. The control unit monitors driver acceleration patterns and dynamically modifies the load requirement threshold that triggers engine restart, allowing the system to adapt to individual driving styles rather than using a fixed threshold. This dynamic approach extends electric-only driving range without requiring additional hardware or increasing vehicle weight.
2Loss of energy
If the restart threshold is lowered to encourage electric-only driving, then fuel consumption is reduced, but the driver's ability to access higher power when needed is restricted
Solution Approach 1:
The system performs preliminary learning of driver acceleration patterns during normal operation. By monitoring and storing driver behavior data over time, the system builds a profile of typical acceleration requests before making decisions about engine restart. This preliminary action allows the system to distinguish between normal acceleration patterns and situations where the driver genuinely needs maximum power, enabling it to maintain a lower restart threshold while still responding appropriately to high-power demands.
Solution Approach 2:
The patent implements a feedback mechanism where the control unit continuously monitors driver responses to engine restart events and adjusts the restart threshold accordingly. When the driver requests power above the threshold, the system learns from this feedback and modifies future threshold settings. This closed-loop feedback ensures that fuel savings are maximized while maintaining the driver's ability to access required power levels.
3Ease of operation
If the restart threshold is raised to allow more flexible driving, then driver convenience is improved, but electric-only driving duration is reduced and fuel consumption increases
Solution Approach 1:
The system performs preliminary learning of driver acceleration patterns during normal operation. By monitoring and storing driver behavior data over time, the system builds a profile of typical acceleration requests before making decisions about engine restart. This preliminary action allows the system to distinguish between normal acceleration patterns and situations where the driver genuinely needs maximum power, enabling it to maintain a lower restart threshold while still responding appropriately to high-power demands.
4Device complexity
If the display shows a fixed restart point, then the display simplicity is maintained, but the driver cannot understand how to actively influence the restart point
Solution Approach 1:
The patent implements a feedback mechanism where the control unit continuously monitors driver responses to engine restart events and adjusts the restart threshold accordingly. When the driver requests power above the threshold, the system learns from this feedback and modifies future threshold settings. This closed-loop feedback ensures that fuel savings are maximized while maintaining the driver's ability to access required power levels.
Solution Approach 2:
The patent implements dynamic adjustment of the restart threshold based on driver behavior patterns. The control unit monitors driver acceleration patterns and dynamically modifies the load requirement threshold that triggers engine restart, allowing the system to adapt to individual driving styles rather than using a fixed threshold. This dynamic approach extends electric-only driving range without requiring additional hardware or increasing vehicle weight.
Data Source
AI summary
A display device for a hybrid vehicle having a first drive source and at least one second drive source for driving the hybrid vehicle according to a load requirement by the driver. The display device has at least one display component for displaying a value of a load requirement predetermined by the driver at a specific time and, when the hybrid vehicle is driven exclusively by the at least one second drive at said time, at least one additional display component is provided for visualizing a limit of a maximum load requirement retrievable by the driver at said time, wherein if said load requirement is exceeded, the first drive source is also or exclusively activated for driving the hybrid vehicle. At least one further display component can be activated, via which the visualization of at least one such mode of operation of the hybrid vehicle is possible.