Front-Loading Vehicle Brake Control for Emergency Deceleration
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Solution Overview
Problem
Industrial trucks with front-loading devices face the risk of tilting during deceleration due to the dynamic repositioning of the center of gravity, which existing technologies partially address by reducing brake pressure in the front axle, but fail to allow maximum braking deceleration in emergency situations while preventing tilting.
Innovation Solution
A device and method that utilize sensors to measure load mass and center of gravity, an electronic evaluation and control unit to determine maximum braking deceleration, and a hydraulic or pneumatic brake system with ABS to adjust brake pressure, allowing full brake pressure application in emergency braking situations to prioritize deceleration over tilting prevention.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If brake pressure in the front axle is reduced to prevent tilting, then vehicle stability is improved, but braking deceleration capability deteriorates
Solution Approach 1:
The brake pressure control system dynamically adjusts the brake pressure in the front axle based on real-time sensor data about load mass and center of gravity position. The system transitions between different braking modes (normal braking with tilt prevention and emergency braking with full deceleration) based on the detected situation, making the system adaptable rather than static.
Solution Approach 2:
The system changes the brake pressure parameter in the front axle based on detected conditions. During normal operation, brake pressure is limited to prevent tilting. During emergency situations, the system detects full brake pedal application and overrides the pressure limitation, allowing maximum brake pressure to be applied for emergency stopping.
2Reliability
If maximum braking deceleration is applied, then collision prevention is improved, but vehicle tilting risk increases
Solution Approach 1:
The system uses sensor feedback to continuously monitor load mass and center of gravity position. This feedback information is used by the control unit to determine whether to limit or allow maximum brake pressure. The feedback loop enables the system to make real-time decisions about braking capability based on actual vehicle conditions.
Solution Approach 2:
The system performs preliminary assessment of the braking situation by detecting brake pedal application force and position before allowing maximum brake pressure. The control unit evaluates whether this is an emergency braking situation or normal braking, and pre-determines the appropriate brake pressure level to apply, preventing tilting in normal conditions while enabling maximum deceleration when needed.
3Stability of the object's composition
If tilt prevention control is always active, then vehicle stability is improved, but emergency braking capability deteriorates
Solution Approach 1:
The tilt prevention control is made dynamic rather than always active. The system automatically switches between tilt prevention mode (during normal braking) and full braking mode (during emergency braking), allowing the control characteristics to change based on the situation. This dynamic switching resolves the contradiction between stability and emergency capability.
Solution Approach 2:
The system applies preliminary anti-action by detecting emergency braking conditions (full brake pedal application) and preemptively overriding the tilt prevention brake pressure limitation. This preliminary detection and response allows the system to prepare for and execute maximum deceleration when needed, counteracting the always-active tilt prevention control.
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
Enables the vehicle to achieve maximum braking deceleration in emergency situations while accounting for potential tilting, thereby preventing crashes or collisions, and allows the driver to manually override tilting to protect uninvolved third parties.
Implementation Method 1
sensors for measuring the mass as well as the position of the center of gravity of a received load
Implementation Method 2
a hydraulic or pneumatic brake system which for delimiting or reducing the effective brake pressure in the wheel brake cylinders
Implementation Method 3
brake system...effective brake pressure in the wheel brake cylinders
Implementation Method 4
brake system which for delimiting or reducing the effective brake pressure in the wheel brake cylinders of the front axle is actuatable by the evaluation and control unit and is provided with an anti-lock brake system
Data Source
AI summary
A device and a method for decelerating a vehicle having a front-loading device has a brake system and sensors for measuring the mass and the center of gravity of a load. An electronic evaluation and control unit evaluates the sensor data to determine a maximum brake deceleration in forward travel, in order to prevent the vehicle tilting about the front axle. At least one sensor of the brake system generates a sensor signal in an emergency braking situation for triggering an emergency braking operation, in which the delimitation or reduction of the effective brake pressure in the wheel brake cylinders of the front axle is canceled and, with the exception of an ABS control operation, the full brake pressure is introduced in a controlled manner by way of a primary brake valve into the wheel brake cylinders of the front axle.