Vehicle Brake Device Pulsation Damping via Damper Unit
Solution Overview
Problem
Existing brake devices for vehicles experience unstable braking due to pulsation of oil discharged from the motor pump, which affects the consistent provision of braking force, especially with the increasing implementation of autonomous emergency braking functions.
Innovation Solution
A brake device design that incorporates a housing block with buildup and reduce valve mounting parts, a damper unit, and an orifice to reduce pulsation amplitude, forming a flow path that includes a first and second damper to smooth the hydraulic pressure transfer from the pump to the wheel cylinder, optimizing the use of mounting space and reducing pulsation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If a motor pump is driven to supply brake oil during autonomous emergency braking, then hydraulic pressure is amplified and transferred to the wheel cylinder, but pulsation occurs in the discharged oil causing unstable braking force
Solution Approach 1:
A damper unit is introduced as an intermediary component between the motor pump and the wheel cylinder. The damper unit absorbs and attenuates the pulsation of discharged oil, allowing the hydraulic pressure to be effectively transmitted while filtering out the harmful pulsations that cause unstable braking force.
Solution Approach 2:
The pulsation generated by the motor pump during autonomous emergency braking is converted from a harmful factor into a beneficial one by using it to drive the damper unit. The damper unit utilizes this pulsation energy to maintain steady oil flow to the wheel cylinder, transforming the instability into a mechanism that ensures stable braking force.
2Device complexity
If traditional brake device layout is used, then结构简单 (structure is simple), but mounting space utilization is poor
Solution Approach 1:
Multiple functional components including the damper unit, buildup valve mounting parts, reduce valve mounting parts, and port structures are merged into a single integrated housing block. This consolidation improves mounting space utilization by eliminating the need for separate mounting structures while maintaining structural simplicity through unified design.
Solution Approach 2:
The housing block serves multiple functions simultaneously: it provides structural support, houses the damper unit, mounts the buildup and reduce valves, and forms the flow paths through its integrated port structures. This multi-functionality maximizes the utilization of mounting space without increasing overall device 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 solution effectively attenuates pulsation amplitude, ensuring a stable braking force is consistently provided to the vehicle, improving the efficiency of the braking system and utilizing space more effectively.
Implementation Method 1
one or more dampers formed in the housing block, and disposed among the buildup valve mounting parts, the wheel cylinder port and the master cylinder port
Implementation Method 2
an orifice disposed between the damper unit and the wheel cylinder port
Implementation Method 3
the master cylinder port, the pump port, the damper unit and the buildup valve mounting part are connected as a flow path
Data Source
AI summary
A brake device for a vehicle may include: a housing block; a plurality of buildup valve mounting parts formed in the housing block and disposed in a first row region; a plurality of reduce valve mounting parts formed in the housing block, and disposed in a second row region formed under the buildup valve mounting parts; a wheel cylinder port formed in the housing block, disposed above the buildup valve mounting parts, and connected to a wheel cylinder; a master cylinder port formed in the housing block, disposed above the buildup valve mounting parts, and connected to a master cylinder; a pump port formed in the housing block, and disposed under the buildup valve mounting parts; and one or more damper units formed in the housing block, and disposed among the buildup valve mounting parts, the wheel cylinder port and the master cylinder port.