Electric Booster Brake Pressure Calibration for Target Deceleration
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Solution Overview
Problem
The existing process for updating the setting value for controlling the boost power of an electric booster is time-consuming, as it requires manual adjustment based on vehicle response during braking.
Innovation Solution
An apparatus and method that include a control unit and a measuring unit to measure braking characteristics such as pedal stroke, deceleration, and hydraulic pressure during a braking test. The control unit updates the pre-stored setting value to achieve the desired target deceleration, with the setting value being proportional to the pedal stroke and determining the magnitude of hydraulic pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If manual adjustment of setting values is performed based on vehicle response during braking, then the boost power control can be optimized, but the updating process takes a lot of time
Solution Approach 1:
The patent replaces the manual mechanical adjustment process with an automated calculation system. The control unit automatically calculates the setting value using the formula: setting value = k1 × pedal stroke + k2, where k1 and k2 are determined through linear regression analysis of measured braking characteristics data. This substitution eliminates time-consuming manual iteration while maintaining optimization accuracy.
Solution Approach 2:
The patent creates a mathematical model (linear regression equation) that copies the relationship between braking characteristics and optimal setting values. By establishing this predictive model from measured data, the system can determine setting values without repeatedly performing actual braking tests and manual adjustments, significantly reducing updating time while preserving precision.
2Reliability
If the setting value is manually adjusted through continuous changes in pedal operation, then the desired deceleration can be achieved, but the process requires repeated measurements and adjustments
Solution Approach 1:
The patent implements a feedback mechanism where the control unit measures actual braking characteristics (pedal stroke, deceleration, hydraulic pressure) and uses this data to calculate the optimal setting value. The measured characteristics feed into the linear regression model, which then determines the setting value that will achieve desired deceleration performance, creating a closed-loop system that ensures reliability while improving efficiency.
Solution Approach 2:
The patent performs preliminary measurement of braking characteristics through braking tests, then uses this data to pre-calculate the optimal setting value before actual operation. By establishing the relationship between braking characteristics and optimal settings in advance through linear regression analysis, the system eliminates the need for repeated adjustments during actual braking operations, significantly improving updating efficiency while maintaining reliable deceleration control.
Data Source
AI summary
An apparatus for updating a pre-stored setting value for controlling boost power of an electric booster, includes: a control unit including a processor; and a storage medium recording one or more programs configured to be executable by the processor, the one or more programs including instructions; and a measuring unit of measuring braking characteristics including pedal stroke, deceleration, and hydraulic pressure applied from the electric booster to a braking unit during braking through a braking test of a vehicle, wherein the control unit is configured for updating the pre-stored setting value so that the deceleration includes desired target deceleration based on the measured braking characteristics, and wherein the pre-stored setting value may be proportional to the pedal stroke, and may be a value for setting a magnitude of the hydraulic pressure.