Trailer Braking Control Device with Accumulator
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Solution Overview
Problem
Small prime movers with low flow rate pumps struggle to simultaneously supply the braking system and automatic/parking brake lines of trailers, leading to delayed or unsynchronized braking responses.
Innovation Solution
A hydraulic braking control device featuring an accumulator and valve system that prioritizes flow to both lines, using an accumulator to store fluid and ensure rapid activation/deactivation of brakes, even with low flow rate pumps, and includes piloting mechanisms to manage valve positions and pressure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If a small prime mover with low flow rate pump is used, then the device complexity and cost are reduced, but the braking system cannot simultaneously supply both the control line and additional line, leading to delayed or unsynchronized braking responses
Solution Approach 1:
The accumulator is pre-filled with a volume of work fluid sufficient to supply both the control line and additional line simultaneously. This preliminary storage of fluid eliminates the need for the pump to deliver high flow rates during actual braking operations, allowing small prime movers to achieve synchronized braking response without delay.
Solution Approach 2:
The accumulator acts as an intermediary between the low flow rate pump and the dual braking lines. It receives fluid from the pump at low flow rates and releases it rapidly when both lines need fluid simultaneously, decoupling the pump's limited capacity from the system's demand for simultaneous high flow rates to both lines.
2Quantity of substance
If the pump flow rate is insufficient to supply both lines simultaneously, then the prime mover size and cost are reduced, but the synchronization between service brake and automatic/parking brake activation is compromised
Solution Approach 1:
The accumulator is pre-filled with a volume of work fluid sufficient to supply both the control line and additional line simultaneously. This preliminary storage of fluid eliminates the need for the pump to deliver high flow rates during actual braking operations, allowing small prime movers to achieve synchronized braking response without delay.
Solution Approach 2:
The accumulator acts as an intermediary between the low flow rate pump and the dual braking lines. It receives fluid from the pump at low flow rates and releases it rapidly when both lines need fluid simultaneously, decoupling the pump's limited capacity from the system's demand for simultaneous high flow rates to both lines.
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 prompt and synchronized activation/deactivation of trailer brakes, overcoming the limitations of small prime movers by ensuring adequate fluid flow and reducing response times.
Implementation Method 1
the presence of an accumulator, of a third valve means and of a fourth valve means makes it possible to convey the work fluid supplied by a small-sized pump along the secondary line, and therefore to obtain a prompt response both from the service braking and from the deactivation of the automatic and/or parking brake of the trailer
Data Source
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AI summary
The device (1) for controlling the braking of a trailer, comprises: one main line (2) connectable to a source of a work fluid at a first pressure, one secondary line (3), one discharge line (4), one first line (6) connectable to the braking system of the trailer, one second line (7) connectable to the automatic and/or parking brake of the trailer; first valve means (10) operable between a home position and a braking position, first piloting means (11) actuating on the first valve means (10) to displace them from the home position to the braking position, second valve means (12) operable between a normal operating position and an emergency position, one accumulator (14) of the work fluid connected to the secondary line (3), and third and fourth valve means (15, 16) arranged in sequence with each other and interposed between the main line (2) and the secondary line (3), where between the third and fourth valve means (15, 16) is interposed at least one intermediate line (17), wherein the third valve means (15) are operable between at least one home position and at least one first priority position and wherein the fourth valve means (16) are operable between at least one recharging position and at least one stop position.