EV Boost Torque Control With Dynamic Pedal Mapping
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Solution Overview
Problem
Existing boost modes in electric vehicles do not fully exploit the acceleration characteristics of electric drive machines, resulting in a lack of immersive driving experiences.
Innovation Solution
A longitudinal guidance device with a control unit that actuates an ever-increasing drive torque upon activation of a boost switch, transitioning from normal operation to a boost mode with a distorted accelerator pedal characteristic, providing a continuous and immersive driving experience.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If known boost modes with static accelerator pedal characteristics are used, then higher drive torque is achieved at certain pedal positions, but the acceleration characteristics of electric drive machines are not fully exploited and driving experience remains不够 immersive
Solution Approach 1:
The patent applies dynamics by transitioning from static accelerator pedal characteristics to dynamic characteristics that continuously adapt during boost mode. The control unit dynamically adjusts the relationship between accelerator pedal position and drive torque in real-time, creating an ever-increasing torque profile that fully exploits electric motor acceleration capabilities while providing an immersive driving experience.
Solution Approach 2:
The patent changes the parameter of accelerator pedal characteristic from a fixed static curve to a dynamically changing curve during boost operation. The control unit modifies the mapping between pedal position and drive torque continuously, allowing the system to extract maximum acceleration performance from the electric drive machine while maintaining intuitive driver control.
2Power
If static accelerator pedal characteristic maps are used for boost mode, then additional drive torque is requested from normal operation, but the full potential of electric drive machine acceleration is not utilized
Solution Approach 1:
The system dynamically adapts the accelerator pedal characteristic during boost mode rather than using a fixed static map. The control unit continuously adjusts the torque output based on the ever-increasing dynamic characteristic, enabling full utilization of the electric drive machine's acceleration potential while maintaining adaptability to driver input.
3Ease of operation
If an ever-increasing drive torque is actuated during boost switch activation, then a continuous immersive driving experience is created, but the control system must manage continuous torque adjustment
Solution Approach 1:
The control unit performs multiple functions: it manages normal operation torque control, detects boost switch activation, generates the ever-increasing torque profile, and controls the transition back to normal operation. By consolidating these functions in a single control unit, the system achieves complex torque management without proportionally increasing overall system complexity.
Solution Approach 2:
The control unit maintains continuous torque adjustment during boost mode through the ever-increasing characteristic, ensuring uninterrupted immersive driving experience. The dynamic characteristic allows smooth continuous torque modulation rather than discrete steps, enhancing driver engagement while managing control complexity through a unified approach.
Data Source
AI summary
The present disclosure relates to a longitudinal guidance device for a motor vehicle with an electric drive machine, having a control unit, which can be coupled to the drive machine in order to actuate a drive torque, and a boost switch, which can be coupled to the control unit in order to request an additional drive torque, wherein the control unit is designed to actuate a higher drive torque while the boost switch is actuated until a maximum boost torque is reached and/or until the actuation of the boost switch ends.