Utility Vehicle Braking Control for Gradient Compensation
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Solution Overview
Problem
Commercial vehicle drivers need to adjust brake pedal pressure based on various vehicle and environmental factors, such as road gradient and air resistance, to achieve consistent braking, which can be inconsistent and require more effort, especially when driving uphill or downhill.
Innovation Solution
A control unit that determines a target deceleration value using pedal information, accounting for factors like road gradient, air resistance, and drive train torque, and adjusts the braking signal accordingly to maintain consistent braking force regardless of the driving situation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the driver manually adjusts brake pedal pressure based on road gradient and environmental factors, then braking consistency can be improved, but driver effort and complexity increase
Solution Approach 1:
The braking system automatically compensates for road gradient and environmental factors without requiring driver intervention. The control unit calculates the gradient compensation value and adjusts brake pedal pressure automatically, allowing the system to serve itself rather than requiring the driver to manually adjust for each condition change.
Solution Approach 2:
The system uses sensor data from accelerometers, gyroscopes, and other environmental sensors to continuously monitor road gradient and vehicle conditions. This feedback loop allows the control unit to dynamically adjust brake pressure in real-time, maintaining consistent braking performance across varying conditions without increasing driver effort.
2Reliability
If the driver presses the brake pedal harder to compensate for downhill gradients, then braking effectiveness improves, but the complexity of operation increases
Solution Approach 1:
The system replaces the mechanical adjustment of brake pressure by the driver with an automated electronic control system. The control unit processes sensor data and automatically modulates brake pressure, substituting complex manual mechanical operations with automated electronic control that simplifies the driver's task while maintaining braking effectiveness.
Solution Approach 2:
The system dynamically changes the brake pedal pressure parameter based on detected road gradient and environmental conditions. The control unit calculates the appropriate compensation value and adjusts the pressure parameter automatically, allowing the braking system to adapt to different conditions without requiring the driver to understand or manage the complexity of adjustments.
3Reliability
If the braking system automatically adjusts for road gradient and environmental factors, then braking consistency improves, but system complexity increases
Solution Approach 1:
The control unit serves multiple functions: it processes brake pedal position signals, reads sensor data from accelerometers and gyroscopes, calculates road gradient, determines compensation values, and controls brake pressure. By making the control unit universal and multi-functional, the system achieves improved braking consistency without adding separate dedicated components for each function, thereby limiting the increase in system complexity.
Solution Approach 2:
The system merges the gradient compensation function with the existing brake control system. The control unit integrates sensor data processing, gradient calculation, and brake pressure adjustment into a unified control process, combining multiple functions into a single integrated system rather than adding separate independent systems, thus improving consistency while managing complexity.
Data Source
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Figure 3
AI summary
The present invention relates to a method (300) for decelerating a utility vehicle (100), wherein, in a determination step (302), a target deceleration value (206) is determined for the utility vehicle (100) using pedal information (112), wherein the pedal information (112) represents a pedal position (108) of a brake pedal (110) of the utility vehicle (100); in a determination step (304), an offset value (208) is determined using deceleration information (210) and the target deceleration value (206), wherein the deceleration information (210) represents a current change in speed (Δv) of the utility vehicle (100); and in a provision step (306), a brake signal (104) is provided for a brake system (106) of the utility vehicle (100) using the offset value (208) and the pedal information (112) in order to decelerate the utility vehicle (100).