Electric Parking Brake Valve Control Without Pneumatic Piping
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Solution Overview
Problem
Conventional parking-brake systems for towing vehicles and trailers require complex pneumatic piping systems, which are costly, take up space in the instrument panel, and are not easily adaptable for automatic parking-brake functions.
Innovation Solution
An electric parking brake system that uses electrically controllable solenoid valves and a valve device connected between a feed line and a discharge line, allowing for stable and activated states in response to electrical control signals, thereby eliminating the need for pneumatic piping.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional pneumatic piping systems are used for parking brake control, then reliable brake actuation is achieved, but device complexity and space requirements increase
Solution Approach 1:
The patent replaces the mechanical pneumatic piping system with an electrically controlled valve system. The solenoid valves (510, 520) are electrically actuated components that control pneumatic flow without requiring complex pneumatic piping throughout the cabin. This substitution reduces device complexity while maintaining reliable brake actuation through electrical control signals.
2Ease of operation
If elaborate pneumatic piping systems are installed in the cabin, then parking brake functions are achieved, but space in the instrument panel is consumed
Solution Approach 1:
The patent extracts the parking brake control function from the complex pneumatic piping system and concentrates it in electrically controllable solenoid valves (510, 520) that can be mounted in a compact manner in the instrument panel. This extraction eliminates the need for extensive pneumatic piping while preserving the essential parking brake function, thereby freeing up instrument panel space.
3Ease of operation
If manual pneumatic valves are used for parking brake control, then brake activation is possible, but automatic parking-brake functions cannot be implemented
Solution Approach 1:
The patent replaces manual pneumatic valves with electrically controllable solenoid valves (510, 520) that can be actuated by electrical control signals from automated systems. This substitution enables automatic parking-brake functions while maintaining the capability for manual activation, thereby improving adaptability and versatility of the brake system.
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
The electric parking brake system provides a cost-effective, space-efficient, and safe solution for towing vehicles and trailers, enabling automatic parking-brake functions without the complexity of pneumatic systems.
Implementation Method 1
An electric parking brake system that uses electrically controllable solenoid valves
Data Source
AI summary
An electric-parking-brake for a utility-vehicle, including: a feed-line for brake-pressure air; a discharge-line for brake-pressure air for a pneumatic-brake-device; a first-valve and a second-valve, each being switchable between a stable-state and an activated-state in response to electrical control-signals; and a valve-device which is connected between the feed-line and the discharge-line and exhibits a control-input, the valve device being switchable between a stable-state and an activated-state in response to control signals at the control-input, the feed-line being connected to the discharge-line in the activated-state, in which the first-valve in the stable-state or in the activated-state connects the control-input of the valve-device to the discharge-line, to retain a current-state of the valve-device when the brake-pressure air is applied to the discharge-line, and in the activated or stable state connects the control-input to the second-valve. Also described are an electric parking brake system, a utility vehicle, and a related method.