Nested Screw Hydraulic Pump for Compact Brake Pressure Output
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Solution Overview
Problem
Existing vehicle brake systems face challenges with non-linear hydraulic pumps being bulky and limited in power output, while linear axial hydraulic pumps occupy significant space due to their axial arrangement and motion.
Innovation Solution
A compact hydraulic pump design featuring a screw with an internal tubular cavity and a nut that rotates to create linear motion, coupled with a cylindrical tube and a piston assembly to manage fluid flow and pressure, integrated with a motor, sensor, and controller for efficient brake liquid circulation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If non-linear hydraulic pumps are used, then power output is limited, but the pump becomes bulky
Solution Approach 1:
The cylindrical tube is nested within the internal tubular cavity of the screw, and the piston assembly is nested within the cylindrical tube. This nested arrangement allows multiple functional components to occupy the same spatial envelope, significantly reducing the overall pump size while maintaining power output capability.
Solution Approach 2:
The invention transitions from traditional axial linear motion to radial motion of the piston assembly within the cylindrical tube. This dimensional change allows the pump to achieve compactness in the axial direction while maintaining effective displacement volume for power output.
2Power
If linear axial hydraulic pumps are used, then power output is improved, but the pump occupies significant axial space
Solution Approach 1:
The invention replaces axial linear motion with radial motion of the piston assembly. The piston moves radially within the cylindrical tube, converting axial space requirements into radial space utilization, thereby reducing the axial length of the pump while maintaining power output.
Solution Approach 2:
The piston assembly dynamically adjusts its position within the cylindrical tube during operation, moving radially to displace fluid. This dynamic radial motion replaces the static axial arrangement, enabling compact pump design without sacrificing power capability.
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 design provides a compact and efficient hydraulic pump that effectively circulates brake liquid, addressing space and power output limitations, and can be integrated into vehicle brake systems for improved performance and control.
Implementation Method 1
a screw including: an internal tubular cavity, and an internal port in fluid communication with the internal tubular cavity; a nut surrounding a longitudinal portion of the screw
Implementation Method 2
a nut surrounding a longitudinal portion of the screw; linear motion of the screw generates pressure difference
Implementation Method 3
linear motion of the screw generates pressure difference between the internal tubular cavity and the internal source tubular cavity
Data Source
AI summary
A hydraulic pump may include: a screw including: an internal tubular cavity, and an internal port in fluid communication with the internal tubular cavity; a nut surrounding a longitudinal portion of the screw; and a cylindrical tube fitting within the internal tubular cavity of the screw, the cylindrical tube having a hollow channel that is in fluid communication with the internal tubular cavity of the screw.