Vehicle Brake Hydraulic Block Layout for Pulsation Control
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Solution Overview
Problem
Conventional electric hydraulic brake systems face challenges in increasing braking pressure and managing pulsation phenomena due to shared flow channels for braking fluid pressure, which are not actively controlled based on motor RPM, and difficulty in directly controlling the discharge flow rate of the pump output.
Innovation Solution
A braking apparatus with a separate hydraulic line that includes a block part with distinct oil movement paths for the electric pump, wheel cylinder, and supply channels, featuring a variable valve to adjust oil flow rate and reduce pressure pulsation by varying the oil movement path based on flow rate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a shared flow channel is used for braking fluid pressure, then the device complexity is reduced, but the ability to directly control discharge flow rate of the pump is lost
Solution Approach 1:
The patent divides the shared flow channel into separate flow channels: a first flow channel for receiving oil from the master cylinder and a second flow channel for receiving oil from the electric pump. This segmentation allows independent control of each pump's discharge flow rate while maintaining a relatively simple overall structure.
2Device complexity
If a shared flow channel is used for braking fluid pressure, then the device complexity is reduced, but pressure pulsation control based on motor RPM is compromised
Solution Approach 1:
The patent separates the flow channels to enable independent pressure control for each pump output. This allows the system to manage pressure pulsation phenomena by controlling each flow channel based on motor RPM, improving braking pressure stability without significantly increasing structural complexity.
3Ease of operation
If separate flow channels are provided for each pump output, then discharge flow rate control is improved, but device complexity increases
Solution Approach 1:
The patent merges the first and second flow channels at a common connection point that leads to the wheel cylinder. This allows separate control of each pump's discharge flow rate while maintaining a unified hydraulic system, balancing control capability with structural simplicity.
4Stability of the object's composition
If separate flow channels are provided for each pump output, then braking pressure stability is improved, but device complexity increases
Solution Approach 1:
The patent implements separate flow channels that converge at a common outlet, enabling independent pressure management for each pump. This segmentation allows the system to reduce pressure pulsation and improve braking pressure stability while keeping the overall hydraulic structure relatively simple through the common connection approach.
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 apparatus effectively controls the discharge flow rate of the electric pump, reducing pressure pulsation and optimizing braking performance by separating and managing oil flow through distinct channels, enhancing the responsiveness and stability of the braking system.
Implementation Method 1
a master cylinder part in which pressure of oil is amplified by the pressure applied to the pedal part
Implementation Method 2
an electric pump part inserted into the block part and configured to amplify the pressure of the oil in the block part
Implementation Method 3
a wheel cylinder part connected to the block part that is configured to receive pressurized oil from the block part and to generate a braking force for a wheel
Data Source
AI summary
A braking apparatus includes a pedal configured to be pressed by a driver to cause braking, a master cylinder part in which pressure of oil is amplified by the pressure applied to the pedal part, a block part configured to be supplied with the oil from the master cylinder. An electric pump part is inserted into block part and is configured to amplify the pressure of the oil in the block part. A wheel cylinder part is connected to the block part that is configured to receive pressurized oil from the block part and to generate a braking force for a wheel. The block part defines a space into which the electric pump part is inserted and a plurality of oil movement paths that are connected to the space and separate from each other when the electric pump part is inserted into the space.