Integrated Brake Device Master Cylinder Pedal Force Generation

Resolve Bottlenecks,
Find Innovative SolutionsGenerate Solutions

Solution Overview

Problem

Conventional hydraulic brake-by-wire systems are bulky, costly, and complex, with increased operation noise and power consumption due to multiple valves and components, which complicates their configuration and operation, especially in emergency braking scenarios.

Innovation Solution

A brake device design that integrates a master cylinder with a movable master piston and a pedal force generation part, featuring a ring-shaped pedal force generation body with inclined parts to increase hydraulic pressure efficiently during emergency braking, reducing the number of parts and volume while maintaining reliability.

Engineering Contradictions & Design Principles

VSEngineering Contradiction Analysis

1Reliability

If a conventional hydraulic brake-by-wire system is used with separate master cylinder and pedal simulator, then the braking function is achieved, but the volume and number of parts increase

Engineering Contradiction:

Improvebraking functionVSAvoiddevice volume

Core Design Contradiction:

ReliabilityVSVolume of moving object

Solution Approach 1:

The master cylinder and pedal simulator are merged into a single integrated unit. The master piston is movably inserted into the master cylinder body, and the pedal force generation part is housed within the master cylinder body, eliminating the need for separate components while maintaining both braking and pedal force generation functions

Inventive Principle:

Principle #5Merging (Combining)

2Reliability

If multiple valves are applied in the brake system, then the braking control is achieved, but operation noise increases

Engineering Contradiction:

Improvebraking controlVSAvoidoperation noise

Core Design Contradiction:

ReliabilityVSObject-generated harmful factors

Solution Approach 1:

The pedal simulator function is extracted from the conventional separate unit and integrated into the master cylinder. The pedal force generation part uses a pedal force generation body that elastically deforms to interfere with the master piston, eliminating the need for additional valves and reducing operation noise while maintaining braking control

Inventive Principle:

Principle #2Taking out (Extraction)

3Reliability

If a complex configuration with multiple components is used, then the braking function is achieved, but the system complexity increases

Engineering Contradiction:

Improvebraking functionVSAvoidsystem complexity

Core Design Contradiction:

ReliabilityVSDevice complexity

Solution Approach 1:

Inventive Principle:

Principle #5Merging (Combining)

Solution Approach 2:

The integrated master cylinder assembly performs multiple functions: it serves as both the master cylinder for hydraulic pressure generation and the pedal simulator for pedal force generation. The pedal force generation body with inclined parts provides both pedal force and interferes with the master piston to control hydraulic pressure

Inventive Principle:

Principle #6Universality (Multi-functionality)

4Reliability

If multiple valves are applied in the brake system, then the braking control is achieved, but power consumption increases

Engineering Contradiction:

Improvebraking controlVSAvoidpower consumption

Core Design Contradiction:

ReliabilityVSUse of energy by moving object

Solution Approach 1:

The pedal simulator function is extracted from the conventional separate unit and integrated into the master cylinder. The pedal force generation body with inclined parts uses elastic deformation to interfere with the master piston, eliminating the need for powered valves and reducing power consumption while maintaining braking control

Inventive Principle:

Principle #2Taking out (Extraction)

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 design reduces the volume, weight, and cost of the brake device, simplifies the structure, and enhances braking force response speed by integrating the master cylinder and pedal force generation part, minimizing the number of valves and improving operational efficiency.

Implementation Method 1

a master elastic part inserted into the master cylinder body and elastically supporting the master piston

Methodology Applied

Scientific EffectElasticity: Elasticity

Implementation Method 2

a pedal force generation body protruding from the pedal force generation fixed part, and elastically deformed while interfering with the master piston depending on the motion of the master piston

Methodology Applied

Scientific EffectElastic deformation: Elasticity

Implementation Method 3

the hydraulic pressure of the fluid contained in the master cylinder body may be varied depending on the extent that the fluid is pressurized by the master piston

Methodology Applied

Scientific EffectHydraulic pressure: Hydraulic Press

Data Source

PatentUS10336308B2Brake device for vehicle

Publication Date: 2019.07.02 HYUNDAI MOBIS CO LTD

AI summary

A brake device may include: a master cylinder including a master piston moved in connection with a pedal, and a master cylinder body having the master piston movably inserted therein and containing fluid of which hydraulic pressure is varied when the master piston is moved; a pedal force generation part housed in the master cylinder body, and restricting a motion of the master piston while interfering with the master piston depending on the motion of the master piston; a braking actuator configured to generate hydraulic pressure; an actuator connection part connecting the braking actuator to a brake mounted on a wheel; and a master connection part connecting the master cylinder to the actuator connection part.