Our Products

VCBS-I

Variable Combined Braking System
Type I:
An innovation CBS product provides customized optimal brake force distribution ratio to have excellent brake performance.

Layout and operations

Module

The VCBS-I module consists of BFG and BFD. It is activated by the brake wires of the left and right hand levers. Since the BFG acts as the master cylinder of the front brake system, there is no need for a separate master cylinder for the front brake.

BFGBrake force generator

The BFG plays the role of the master cylinder of front disc brake system. It is activated by the righthand brake wire or the BFD.

BFDBrake force distributor

The BFD is used to provide the front and rear brake systems with an optimal force distribution force ratio. It is activated by the lefthand lever.

BFGBrake force generator

The BFG plays the role of the master cylinder of front disc brake system. It is activated by the righthand brake wire or the BFD.

BFDBrake force distribution

The BFD is used to provide the front and rear brake systems with an optimal force distribution force ratio. It is activated by the lefthand lever.

Features and advantages

1.Provide optimal braking force distribution ratio between the front and rear brake systems.

2.Minimize braking distance significantly in emergence braking by increase front braking ratio.

3.Good braking feel : the deceleration increased linearly with brake lever’s force.

4.Low drift in hard braking.

5.Good handling in cornering with braking.

6.Good handbrake lever feel without the interference between left and right levers.

Specification

Dimensions (LxWxH)	64.5 mm × 40 mm × 135 mm
Braking force distribution ratio	F/R：0/100 - 55/45 (Depends on motorcycle’s specifications)
Efficiency	Module’s efficiency > 80%
Decelerations (for L3 level)	Maximum deceleration on normal conditions MFDD ≥ 5.9 m/s² (Regulation ≥ 5.1 m/s²)
Decelerations (for L3 level)	Deceleration when front brake failure MFDD ≥ 3.1m/s² (Regulation ≥ 2.9 m/s²)

Our Products

VCBS-II

Variable Combined Braking System
Type II:
An innovation CBS product provides customized optimal brake force distribution ratio to have excellent brake performance.

Layout and operations

Module

When using the VCBS-II module, the geometry and parts of the handlebar shell of the original car do not need to be changed.
The master cylinder installed on the right handlebar of the original car can be retained as an auxiliary brake.
The VCBS-I module is activated by the lefthand brake lever, which is mainly composed of a hydraulic valve (HPV) and a brake force distributor (BFD).

HPVHydraulic Pressure Valve

When the left brake lever is depressed alone, the BFD activates the HPV to generate brake pressure on the front brake.
When the left and right brake levers are depressed at the same time, the pressure of the right master cylinder plus the pressure of the HPV acts on the caliper of the front brake.
When the right brake lever is depressed alone, the braking force of the front wheels is produced only by the right master cylinder.

BFD

The BFD provides the front and rear brake forces simultaneously, according to an optimal force distribution curve. It is activated by the lefthand lever.

HPVHydraulic Pressure Valve

When the left brake lever is depressed alone, the BFD activates the HPV to generate brake pressure on the front brake.
When the left and right brake levers are depressed at the same time, the pressure of the right master cylinder plus the pressure of the HPV acts on the caliper of the front brake.
When the right brake lever is depressed alone, the braking force of the front wheels is produced only by the right master cylinder.

BFD

The BFD provides the front and rear brake forces simultaneously, according to an optimal force distribution curve. It is activated by the lefthand lever.

Features and advantages

1.Provide optimal braking force distribution ratio between the front and rear brake systems.

2.Minimize braking distance significantly in emergence braking by increase front braking ratio.

3.Good braking feel : the deceleration increased linearly with brake lever’s force.

4.Low drift in hard braking.

5.Good handling in cornering with braking.

6.Good handbrake lever feel without the interference between left and right levers.

Specification

Dimensions (LxWxH)	64.5 mm × 28 mm × 124 mm
Braking force distribution ratio	F/R：0/100 - 55/45 (Depends on motorcycle’s specifications)
Efficiency	Module’s efficiency > 80%
Decelerations ( for L3 level)	Maximum deceleration on normal conditions MFDD ≥ 5.9 m/s² (Regulation ≥ 5.1 m/s²)
Decelerations ( for L3 level)	Deceleration when front brake failure MFDD ≥ 3.1m/s² (Regulation ≥ 2.9m/s²)

Our Products

HBS-2

High Performance Combined Braking System:
An innovative hydraulic valve design for disc-disc braking system provides optimized brake force distribution ratio to have excellent brake performance and brake feels.

Layout and operations

Module

The HBS system is a high-performance combined braking system composed of one Umax PDCV module, the left and right brake master cylinders and calipers of the original car. When installing the PDCV, neither the handlebar structure nor the front body shell of the original car need to be changed.

PDCV is a pressure distribution control valve, which is the core of HBS. It can meet various braking operation modes through parameter optimization design, and can match the vehicle specifications, providing a higher braking distribution ratio for the front wheels, thus greatly improving the braking force of the vehicle.

PDCVPressure distribution control valve

When the lefthand brake lever is depressed alone, the PDCV provides the front and rear brake pressures simultaneously, according to an optimal force distribution curve.
When the left- and righthand brake levers are depressed at the same time, the braking pressure of the front wheel’s caliper is the sum of the pressure from the right master cylinder and the PDCV.
In case of the right brake lever depressed alone, the braking force of the front wheel is produced only by the right master cylinder.

PDCVPressure distribution control valve

When the lefthand brake lever is depressed alone, the PDCV provides the front and rear brake pressures simultaneously, according to an optimal force distribution curve.
When the left- and righthand brake levers are depressed at the same time, the braking pressure of the front wheel’s caliper is the sum of the pressure from the right master cylinder and the PDCV.
In case of the right brake lever depressed alone, the braking force of the front wheel is produced only by the right master cylinder.

Features and advantages

1.Provide optimal braking force distribution ratio between the front and rear brake systems.

2.Minimize braking distance significantly in emergence braking by increase front braking ratio.

3.Good braking feel : the deceleration increased linearly with brake lever’s force.

4.Low rear wheel drift during hard braking.

5.Good handling in cornering with braking.

6.Low interference feel between the right and left hand brake levers

Specification

Net weight	410g
Dimensions (LxWxH)	57 mm × 58 mm × 117 mm
Braking force distribution ratio	F/R：0/100 - 55/45 (Depends on target specifications)
Efficiency	Module’s efficiency > 80%
Decelerations (for L3 level)	Maximum deceleration on normal road conditions MFDD ≥ 5.9 m/s² (Regulation ≥ 5.1 m/s²)
Decelerations (for L3 level)	Deceleration when front brake failure MFDD ≥ 3.1m/s² (Regulation ≥ 2.9 m/s²)

Our Products

HBS-3

High Performance Combined Braking System
for tricycles:
An innovative CBS designed for tricycles with disc-disc braking system. It provides optimized brake force distribution ratio to have excellent brake performance and brake feels.

Layout and operations

Module

When the right handle is pressed, the right total mercury oil pressure independently controls the front wheel calipers.

PDCVPressure distribution control valve

When the left handle is pressed, the front wheel brake oil pressure is generated

PDCVPressure distribution control valve

When pressing the left handle, the braking force of the front and rear wheels is distributed according to the pressing force of the handle

Features and advantages

1.Increased design freedom to provide optimal braking force distribution ratio

2.Excellence braking performance

3.Good braking controllability: applied handlebar force is linear with braking feel

4.Low rear wheel drift during hard braking

5.Good controllability and stability when cornering with braking

6.Low interference feel between the right and left hand brake levers

Specification

Net weight	410g
Dimensions (LxWxH)	57 mm × 58 mm × 117 mm
Braking force distribution ratio	F/R：0/100 - 55/45 (Depends on target specifications)
Efficiency	Module’s efficiency > 80%
Decelerations (for L3 level)	Maximum deceleration on normal road conditions MFDD ≥ 5.9 m/s² (Regulation ≥ 5.1 m/s²)
Decelerations (for L3 level)	Deceleration when front brake failure MFDD 3.1m/s² (Regulation ≥ 2.9 m/s²)