EV Torque Control With Pseudo Clutch Sensitivity Adjustment
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Solution Overview
Problem
Existing electric vehicles lack the ability to control driving torque with the delicacy and situational adaptability provided by manual gear shift type internal combustion engine vehicles, as they typically only have an accelerator pedal without a clutch pedal.
Innovation Solution
An electric vehicle system with a processor-controlled pseudo clutch pedal and indicators that allow for variable torque control, including a first indicator for continuous operation and a second indicator for concurrent operation, with sensitivity adjustments based on vehicle conditions, to mimic manual gear shift operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a pseudo clutch pedal is added to enable delicate torque control, then the ease of operation is improved, but the device complexity increases
Solution Approach 1:
The control system is segmented into two independent indicator inputs: a first indicator for basic torque control and a second indicator for sensitivity adjustment. This segmentation allows each indicator to handle specific control aspects, improving overall operation delicacy while keeping individual indicator functions simple and manageable.
Solution Approach 2:
The system dynamically adjusts the sensitivity of torque response based on the operation amount of the second indicator. The processor changes the sensitivity of torque change according to the second indicator's operation, enabling the system to adapt its responsiveness to different driving situations, thereby improving ease of operation without requiring complex hardware modifications.
2Ease of operation
If the sensitivity of torque change is reduced under certain conditions, then the ease of operation is improved, but the adaptability to different situations decreases
Solution Approach 1:
The system dynamically adjusts sensitivity based on real-time operating conditions detected by the processor. When predetermined conditions are satisfied, the processor reduces the sensitivity of torque change to the second indicator's operation. This dynamic adaptation allows the system to maintain stability when needed while preserving the ability to respond delicately in other situations, effectively resolving the contradiction between ease of operation and situational adaptability.
Solution Approach 2:
The system changes the sensitivity parameter of torque response based on operating conditions. By adjusting this parameter dynamically, the system can optimize torque control characteristics for different situations - reducing sensitivity for stability when required, while maintaining higher sensitivity for delicate control when conditions allow, thus achieving both ease of operation and adaptability.
3Ease of operation
If two indicators are used for concurrent operation, then the ease of operation is improved, but the difficulty of detecting and measuring increases
Solution Approach 1:
The detection system is segmented to independently process signals from the first indicator and second indicator. The processor separately determines the operation amount of each indicator and processes them through different control pathways - the first indicator controls basic torque while the second indicator adjusts sensitivity. This segmented detection approach simplifies the measurement process for each indicator while maintaining overall control precision.
Solution Approach 2:
The system dynamically determines which indicator has priority based on the predetermined conditions and current operating state. The processor adaptively processes the operation amounts of both indicators, changing the sensitivity of torque response to the second indicator based on real-time conditions. This dynamic processing reduces the complexity of detecting and measuring both indicators simultaneously by intelligently managing their interactions.
Data Source
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AI summary
An electric vehicle (100) having an electric motor (6) as a driving source, includes: a processor (110) configured to control driving torque to be output by the electric motor (6); a first indicator; and a second indicator, wherein the processor (110) is configured to: determine a basic torque that is driving torque in a state where the second indicator is not operated, according to the operation amount of the first indicator and a vehicle speed of the electric vehicle; change the driving torque between the basic torque and a minimum torque according to the operation amount of the second indicator; and reduce sensitivity of the change of the driving torque according to the operation amount of the second indicator when a predetermined condition is satisfied.