Hydraulic Brake Pressure Supply Damping for Pump Vibration Noise
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Solution Overview
Problem
Electronic brake systems experience vibration and noise due to shock when the piston moves forward and backward in the hydraulic pressure supply device, causing inconvenience to users.
Innovation Solution
A hydraulic pressure supply device is designed with a damping member between the sleeve and housing to absorb vibration and prevent noise, featuring a tubular damping body with slits and extension portions to distribute stress and a contact surface that gradually decreases, coupled with a motor pump unit and hydraulic block to generate hydraulic pressure efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a piston moves forward and backward in a pump to generate hydraulic pressure, then hydraulic pressure can be supplied to the wheel cylinder, but vibration and noise are generated due to shock
Solution Approach 1:
A damping member is pre-installed between the piston and the pump housing to provide cushioning before the piston reaches its extreme positions. This damping member absorbs the shock energy during piston movement, preventing vibration and noise generation while maintaining hydraulic pressure generation capability.
Solution Approach 2:
The damping member acts as an intermediary element between the moving piston and the stationary pump housing. It mediates the interaction by absorbing shock energy, thereby eliminating the direct transmission of vibration and noise to the pump housing and surrounding structure.
2Object-affected harmful factors
If a damping member is added to absorb vibration, then noise is prevented, but device complexity increases
Solution Approach 1:
The damping member utilizes changes in material parameters (viscoelastic properties) under varying pressure and temperature conditions to provide effective vibration damping. By selecting appropriate material parameters, the damping member achieves noise reduction without requiring complex multi-component structures.
Solution Approach 2:
The damping member is constructed from composite materials that combine viscoelastic properties with structural integrity. This allows a single integrated component to provide both damping functionality and mechanical support, avoiding the need for separate damping elements and reducing overall structural complexity.
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 damping member effectively absorbs vibration and noise generated during piston movement, ensuring smooth operation and reducing customer discomfort by preventing vibration and noise in the hydraulic pressure supply device.
Implementation Method 1
a damping member provided between the sleeve and the housing and configured to absorb vibration generated between the sleeve and the housing
Implementation Method 2
a motor pump unit coupled to one side of the hydraulic block, configured to generate drive force by supply of power and to move forward and backward by the drive force
Data Source
AI summary
The present disclosure relates to a hydraulic pressure supply device and an electronic brake system including the same, including: a hydraulic block formed with a flow path through which oil supplied from a reservoir flows; a motor pump unit coupled to one side of the hydraulic block, configured to generate drive force by supply of power and to move forward and backward by the drive force; a sleeve coupled to an inside of the hydraulic block on the other side of the hydraulic block and configured to form a forward and backward path of the motor pump unit; a housing coupled to the other side of the hydraulic block and configured to form a space for generating hydraulic pressure with the oil supplied from the reservoir while shielding the other side of the sleeve; and a damping member provided between the sleeve and the housing and configured to absorb vibration generated between the sleeve and the housing and to prevent noise when pressure in the space for generating the hydraulic pressure rises due to the forward and backward movement of the motor pump unit.