Trailer Brake Control Through the Emergency Air Line
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Solution Overview
Problem
Existing systems fail to effectively control trailer brakes when only the emergency air line is connected, leading to safety concerns, particularly when maneuvering heavily loaded trailers, as the tractor cannot activate the trailer brakes without the service brake line.
Innovation Solution
An inversion valve is inserted between the emergency brake control and the tractor connection, regulated by a supply signal from the treadle valve, allowing the trailer brakes to be controlled through the emergency brake line without the need for a service brake line connection.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If only the emergency air line is connected between tractor and trailer, then the connection complexity is reduced, but the ability to control trailer brakes is lost
Solution Approach 1:
The emergency air line is made to serve dual purposes: its traditional function of controlling emergency brakes and a new function of controlling service brakes through the inversion valve. This allows the single emergency air line to replace the need for both emergency and service brake lines, reducing connection complexity while maintaining brake control capability.
Solution Approach 2:
An inversion valve is introduced that reverses the normal function of air pressure signals. Instead of air pressure releasing emergency brakes, the inversion valve causes air pressure to apply service brakes. This inverted logic allows the emergency air line to control service brakes, solving the contradiction between simplified connections and maintained control capability.
2Device complexity
If the service brake line is not connected, then the system complexity is reduced, but safety is compromised when maneuvering heavily loaded trailers
Solution Approach 1:
The inversion valve acts as an intermediary device that enables safe trailer maneuvering without a dedicated service brake line. It mediates between the emergency air line and the trailer brakes, translating emergency brake control signals into service brake activation, thereby maintaining safety while reducing system complexity.
Solution Approach 2:
The emergency air line is given multi-functionality by enabling it to control both emergency and service brakes through the inversion valve. This eliminates the need for a separate service brake line while ensuring safety during trailer maneuvering, as service brakes can be applied when needed.
3Device complexity
If two separate air lines are used for emergency and service brakes, then brake control precision is maintained, but device complexity increases
Solution Approach 1:
The emergency air line is designed to perform multiple functions by controlling both emergency and service brakes through the inversion valve. This consolidation maintains precise brake control while simplifying the air line configuration from two separate lines to a single multi-functional line.
Solution Approach 2:
The inversion valve enables precise brake control by inverting the signal logic: air pressure applied to the emergency brake line is transformed into service brake activation. This maintains the precision of brake control that would normally require separate lines, while achieving simplification through the inverted control mechanism.
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 configuration enables safe and efficient operation of trailer brakes, reducing complexity and enhancing safety in scenarios like autonomous yard vehicles by allowing brake control through a single air line connection.
Implementation Method 1
An inversion valve is inserted between the emergency brake control and the tractor connection, controlled via a supply signal derived from the treadle valve, to regulate the pressure of the emergency brake line
Data Source
AI summary
Systems and methods allow for controlling brakes of a trailer coupled to a tractor. The systems and methods utilize an inversion valve input between an emergency brake controller and a trailer connection at the tractor. The inversion valve receives a supply air from an output of the emergency brake controller, and a control air output from a treadle valve of the tractor. Depending on the control air, the emergency brakes at the tractor may be released/activated to simulate service brake control without requiring connecting the tractor to the trailer service brake line.