Braking System Pressure Gradient Control for Excess Pressure Avoidance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronically slip-controllable braking systems face excess pressures due to a decline in intrinsic elasticity, leading to potential damage to components and reduced braking performance when trying to avoid wheel lockup.
Innovation Solution
Establishing a maximum pressure gradient based on the prevailing elasticity of the braking system, adjusting the activation signal to the pressure generator to prevent excess pressures by limiting the delivery volume and speed of the pressure generator.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If the drive power of the electric motor is increased to achieve rapid pressure buildup and short braking distance, then the pressure buildup dynamics improve, but excess pressures occur when the wheel threatens to lock up, causing component strain and potential damage
Solution Approach 1:
The patent applies dynamics by continuously monitoring the actual pressure gradient and comparing it with a maximum permissible pressure gradient. The activation signal to the electric motor is dynamically adjusted based on this comparison, allowing the system to operate at high power when safe and reduce power when approaching dangerous pressure levels, thus resolving the contradiction between rapid pressure buildup and excess pressure prevention
Solution Approach 2:
The patent implements feedback control by using a pressure gradient monitoring device to detect the actual pressure gradient in real-time and feeding this information back to the electronic control unit. The control unit then adjusts the motor activation signal based on this feedback, creating a closed-loop control system that prevents excess pressure while maintaining optimal braking performance
2Reliability
If the drive power of the electric motor is reduced to prevent excess pressures, then component damage is avoided, but the pressure buildup dynamics and braking distance worsen
Solution Approach 1:
The system dynamically adjusts motor power output based on real-time pressure gradient conditions rather than operating at a fixed reduced power level. This allows the system to maintain high productivity when conditions permit and only reduce power when necessary to prevent component damage, resolving the contradiction between reliability and productivity
Solution Approach 2:
The patent changes the operating parameters of the electric motor based on the monitored pressure gradient. By adjusting the activation signal parameter in response to pressure conditions, the system optimizes the balance between component protection and pressure buildup performance, avoiding both excess pressure and degraded braking dynamics
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
This method prevents component damage from excess pressures, maintains braking performance, and extends the service life of braking system components while reducing operating noise and allowing for cost-effective components.
Implementation Method 1
Forward-moving plunger piston 38 displaces pressure medium present in plunger cylinder 40 while building up a pressure medium pressure in brake circuits A; B
Implementation Method 2
pressure buildup valve 42 control a pressure medium connection between wheel brakes 12 and associated brake circuit A; B, by interrupting or regulating, i.e., partially or completely opening, this pressure medium connection
Implementation Method 3
A brake force generated by wheel brake 12 results via the brake pressure, using which finally a vehicle is braked
Data Source
AI summary
The present invention relates to a method for avoiding excess pressures in a pressure medium circuit of an electronically slip-controllable braking system in the event of a decline of an intrinsic elasticity of the braking system and an electronically slip-controllable braking system. Electronic control units, ascertain a setpoint value for a delivery volume of the pressure generator of these braking systems and convert it into an activation signal for the drive of the pressure generator. In dependence on the prevailing elasticity of the pressure medium circuit, a pressure gradient is established, using which the pressure in the pressure medium circuit changes over time. The ascertainment of an activation signal for the drive of the pressure generator by the electronic control unit is based on the established pressure gradient.