Brake Pressure Control Unit Housing Design
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Solution Overview
Problem
Existing brake pressure control units for motor vehicle systems are not compact and reliable enough, lacking a simple and functional design that allows for independent brake pressure buildup in wheel brakes without relying on the master brake cylinder.
Innovation Solution
A compact brake pressure control unit design featuring an electric motor in a first housing and a piston in a second housing, with a central third housing that includes a ball screw drive for translational movement, allowing for a defined brake pressure buildup, and utilizing a plastically deformable third housing for secure and sealed connection between housings through calking, enabling separate and economical manufacturing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional brake pressure control unit design is used, then the brake pressure can be built up independently of the master brake cylinder, but the structure is not compact and is complex
Solution Approach 1:
The patent merges the electric motor and piston into a single integrated housing, eliminating the need for separate housings for each component. This integration reduces the overall number of parts and simplifies the structural design while maintaining the ability to build up brake pressure independently of the master brake cylinder.
Solution Approach 2:
The single housing serves multiple functions: it contains both the electric motor and piston, provides structural support, and enables compact arrangement of components. This multi-functional design reduces device complexity while maintaining reliable independent brake pressure control.
2Ease of manufacture
If separate housings for motor and piston are used, then manufacturing is easier, but the overall unit is not compact
Solution Approach 1:
The patent combines the motor housing and piston housing into a single integrated housing structure. This merging eliminates the need for separate housings, reduces the overall volume of the unit, and creates a more compact design while still allowing for efficient manufacturing processes.
Solution Approach 2:
While the housing is integrated, the internal components (motor and piston) are arranged in distinct sections within the housing, allowing for modular assembly and ease of manufacture. The housing can be manufactured as a single piece or in sections that are later joined, maintaining manufacturing ease while achieving compactness.
3Ease of manufacture
If traditional connection methods are used between housings, then assembly is simple, but sealing and reliability are compromised
Solution Approach 1:
The integration of motor and piston into a single housing eliminates the need for traditional connection methods between separate housings. This merging removes potential sealing interfaces, thereby improving sealing reliability and overall system reliability while maintaining manufacturing simplicity through the unified 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 solution results in a compact, reliable, and cost-effective brake pressure control unit with improved machining freedom and automation potential, facilitating efficient closed-loop control of wheel brake pressure through separate housing design and material selection.
Implementation Method 1
an electric motor, the rotational movement of which is transformed by means of a ball screw drive (5) into a translational movement of a piston (6)
Implementation Method 2
The third housing (3) is composed of a soft material, preferably of a light metal alloy... which, for the fixing of the second housing (2) to the third housing (3), is displaced, as per the figure, onto an oblique shoulder (12), for which purpose, in the region of the calking point (13), a calking tool (not illustrated in any more detail) is used which deforms the plastically displaceable material of the housing 3
Data Source
AI summary
A brake pressure control unit for a motor vehicle brake system, having an electric motor, the rotational movement of which is transformed by a ball screw drive into a translational movement of a piston, in order for it to be possible to build up a defined brake pressure in a wheel brake independently of the actuation of a brake master cylinder. The electric motor is received in a first housing and the piston is received in a second housing which is arranged diametrically with respect to the first housing, and a third housing with two diametrical end surfaces is arranged between the first and the second housing, on which end surfaces the first and the second housing are fixed.