Hydraulic Unit Modulator Block Arrangement
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Solution Overview
Problem
The existing hydraulic units in electronic control brake systems suffer from increased size and weight due to the parallel arrangement of high-pressure accumulators, which complicates flow path formation and increases manufacturing costs, as well as noise and pulsation issues.
Innovation Solution
The hydraulic unit is optimized by arranging high-pressure accumulator bores in a longitudinal direction parallel to motor accommodation bores, forming straight flow paths and utilizing spaces between valve accommodation bores to minimize the modulator block's size and weight, while connecting the high-pressure accumulator to the pump and driving force control valve through orthogonal flow paths.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the high-pressure accumulator is installed parallel to the hydraulic pump in the modulator block, then the accumulator can be directly connected to the pump through one flow path, but the modulator block size increases and weight increases leading to cost increases
Solution Approach 1:
The patent changes the arrangement dimension of the high-pressure accumulator from parallel (horizontal) to vertical relative to the hydraulic pump. This dimensional change allows the accumulator to be positioned above the pump, utilizing vertical space within the modulator block rather than expanding horizontal footprint, thereby reducing overall block size and weight while maintaining direct flow path connection.
2Ease of manufacture
If the modulator block size is increased to accommodate parallel arrangement of high-pressure accumulator, then accumulator installation is simplified, but the size and weight of hydraulic unit increase
Solution Approach 1:
The patent utilizes vertical space within the existing modulator block by positioning the high-pressure accumulator above the hydraulic pump. This vertical arrangement allows the accumulator to be accommodated within the current block volume without requiring horizontal expansion, thereby maintaining compact size while simplifying accumulator installation and connection.
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
This configuration reduces the size and weight of the hydraulic unit, enhances flow path processability, and minimizes manufacturing costs by optimizing the modulator block's design, while improving noise and pulsation reduction, facilitating easier and more efficient brake pressure control.
Implementation Method 1
a high-pressure accumulator for temporarily storing oil pressed and discharged by the pumps so as to reduce pressure pulsation of the oil
Implementation Method 2
a plurality of solenoid valves (introduction/discharge valves) for controlling brake hydraulic pressure transmitted to the wheel cylinder
Data Source
AI summary
A hydraulic unit of an electronic control brake system including a modulator block; a pair of master cylinder connection portions; a first valve row having a plurality of first valve accommodation bores; a second valve row having a plurality of second valve accommodation bores; a pair of low-pressure accumulator bores arranged in a bottom side of the modulator block in the lateral direction; pump accommodation bores; a pair of shuttle valve ESV accommodation bores arranged between the first valve row and the second valve row; a pair of driving force control valve TC accommodation bores arranged between wheel cylinder connection portions formed in the modulator block and the first valve row; and a pair of high-pressure accumulator bores arranged in the modulator block in a longitudinal direction, wherein the pair of high-pressure accumulator bores are formed to have an arrangement parallel to the motor accommodation bores.