Simplified Outlet Valve for Brake Pump Pulsation
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Solution Overview
Problem
Conventional pumps in electronically controlled brake systems have a complex outlet valve configuration, leading to increased manufacturing costs and operation noise due to fluid pulsation, which affects brake pedal tactile feedback.
Innovation Solution
A simplified outlet valve configuration using a sleeve with a valve seat and valve cap formed by press-forming, incorporating an orifice to reduce fluid pulsation and a damping region to absorb pulsation-induced vibrations, allowing for reduced manufacturing costs and improved assembly efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a conventional outlet valve configuration is used, then the valve can control fluid flow, but the manufacturing cost increases and assembly complexity increases
Solution Approach 1:
The patent merges the outlet valve components into an integrated structure where the valve body, valve seat, and spring assembly are combined into a single compact unit. This integration reduces the number of separate parts that need to be manufactured and assembled, directly addressing the contradiction by simplifying the overall configuration while maintaining flow control functionality.
Solution Approach 2:
The outlet valve design incorporates multiple functions within a single configuration: flow control, pressure regulation, and automatic closure. This multi-functionality reduces the need for separate specialized components, thereby lowering manufacturing costs and assembly complexity while still achieving the necessary flow control performance.
2Productivity
If a conventional outlet valve configuration is used, then the valve can control fluid flow, but the assembly efficiency decreases
Solution Approach 1:
By combining multiple outlet valve components into an integrated assembly, the patent reduces the number of discrete assembly steps required. The merged structure allows for pre-assembly of critical components, which can then be installed as a single unit, directly improving assembly efficiency while reducing the overall device complexity.
Solution Approach 2:
The outlet valve components are designed to be pre-assembled and pre-positioned within the valve body before final installation. This preliminary action allows for quality control and alignment to be performed during the pre-assembly stage, reducing the time and complexity of the final assembly process and thereby improving overall assembly efficiency.
3Object-affected harmful factors
If the outlet valve operates with traditional design, then fluid flow control is achieved, but fluid pulsation increases causing operation noise
Solution Approach 1:
The patent incorporates a spring-loaded valve design that provides cushioning during the valve closure process. The spring absorbs the impact energy and dampens the fluid pulsation that occurs when the valve closes, thereby reducing operation noise and harmful vibrations before they can propagate through the system, while maintaining a relatively simple valve configuration.
Solution Approach 2:
The patent converts the potentially harmful fluid pulsation and impact forces into beneficial damping effects by utilizing the spring mechanism to absorb and dissipate energy. The spring compression during valve operation transforms the harmful pulsation into controlled elastic deformation, reducing noise while maintaining the simplicity of the valve structure.
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 simplified configuration reduces manufacturing costs, minimizes fluid pulsation, and decreases operation noise, thereby enhancing the tactile feedback from the brake pedal.
Implementation Method 1
An eccentric motor 2 is installed in the center of the block 1 and generates an eccentric rotating force. A piston 11 is installed in the bore 3, to perform rectilinear reciprocation using the eccentric force supplied from the eccentric motor 2.
Implementation Method 2
The inlet valve 12 and piston 11 are elastically supported by a supporting spring 17, an entrance-side spring 18, and a return spring 19.
Data Source
AI summary
A pump of an electronically controlled brake system. The pump includes a bore formed in a modulator block and connected with a suction port and a discharge port, a piston installed in the bore in a reciprocating movable manner and defining an inlet path therein, an inlet valve to open or close an exit-side end of the inlet path according to a position of the piston, and an outlet valve provided at one side of the bore, operations of the inlet and outlet valves being contrary to each other. The outlet valve includes a valve seat, a sleeve to surround the valve seat, an outlet ball interposed between the sleeve and the valve seat and used to open or close a path defined in the valve seat, and a valve cap provided at one side of the sleeve to isolate an interior from an exterior of the bore. One or more of the valve sheet, sleeve, and valve cap are formed by press-forming, to achieve improved assembly efficiency and reduced manufacturing costs.