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Motorcycle Brake GTR. Progress report to 50/GRRF. Report items High speed test evaluation Control layouts Pre-burnishing test Maximum and minimum lever force efforts Status of IMMA work and future actions. High Speed Test (IMMA's severity comparison of FMVSS/ ECE/ Japan).

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Motorcycle Brake GTR

Progress report to 50/GRRF


Slide2 l.jpg

Report items

  • High speed test evaluation

  • Control layouts

  • Pre-burnishing test

  • Maximum and minimum lever force efforts

  • Status of IMMA work and future actions

IMMA Brake Harmonization Task Force


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High Speed Test

(IMMA's severity comparison

of FMVSS/ ECE/ Japan)

IMMA Brake Harmonization Task Force


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<Objective>

To analyse the relative severity of the braking performance during the high-speed tests in FMVSS, ECE and Japan.

To establish the high-speed test procedure suitable for GTR.

<Items Covered>

(1) Comparison of requirements regulated in FMVSS/ECE/Japan

(2) Summary of the most severe requirements for the high-speed tests

IMMA Brake Harmonization Task Force


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(1) Comparison of requirements in FMVSS/ECE/Japan

<FMVSS>

<ECE>

<Japan>

Test condition

・Weight

unladen

・Control

both

disconnected

connected

・Engine

After 1 mile of

160km/h or

full accel.

Vmax * 0.8,

・Speed

Up to a max of

whichever is

less

192 km/h

ObjectiveRequirement

・Deceleration

5.4 m/s2

No

5.8

Behaviour during

braking

No

Yes

Yes

IMMA Brake Harmonization Task Force


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(1) Comparison of requirements in FMVSS/ECE/Japan

Items to be considered in the

high speed test

Braking force

Kinetic energy

Behaviour during braking

1. Severity comparison of braking force

1-a Approach

The key influences on braking force are:

1) deceleration 2) engine connected or disconnected

ECE has no requirement for deceleration.

a. FMVSS (Engine disconnect, 5.4m/s2)

b. Japan (Engine connect, 5.8m/s2)

Compare FMVSS and Japan at these decelerations.

IMMA Brake Harmonization Task Force


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(1) Comparison of requirements in FMVSS/ECE/Japan

1. Severity comparison of braking force

1-b.Severity comparison test of FMVSS and Japan

Method : Compare the average control forces needed to satisfy each regulation.

The higher the force, the more severe.

  • Weight : unladen

  • Test speed :

  • Engine :

  • Deceleration :

FMVSS

Japan

192 km/h

160 km/h

disconnected

connected

2

2

5.4m/s

5.8m/s

IMMA Brake Harmonization Task Force


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(1) Comparison of requirements in FMVSS/ECE/Japan

1. Severity comparison of braking force

1-c-1.Test result (average control forces)

The braking force necessary for compliance : model A : 1000 cc

FMVSS

Japan

kgf

IMMA Brake Harmonization Task Force


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(1) Comparison of requirements in FMVSS/ECE/Japan

1. Severity comparison of braking force

1-c-2.Test result (average control forces)

The braking force necessary for compliance : model B :1000 cc

FMVSS

Japan

kgf

IMMA Brake Harmonization Task Force


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(1) Comparison of requirements in FMVSS/ECE/Japan

1. Severity comparison of braking force

1-c-2.Test result (average control forces)

The braking force necessary for compliance : model C : 900 cc

FMVSS

Japan

kgf

IMMA Brake Harmonization Task Force


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(1) Comparison of requirements in FMVSS/ECE/Japan

1. Severity comparison of braking force

1-c-2.Test result (average control forces)

The braking force necessary for compliance : model D :1000 cc

FMVSS

Japan

kgf

IMMA Brake Harmonization Task Force


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(1) Comparison of requirements in FMVSS/ECE/Japan

1. Severity comparison of braking force

1-d. Conclusion

The Japanese test is more severe than FMVSS

5.8m/s2

& Engine connected

IMMA Brake Harmonization Task Force


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1

mv2

2

(1) Comparison of requirements in FMVSS/ECE/Japan

2. Severity comparison of

kinetic energy.

2-a. Approach

The key influence on kinetic energy is speed: the mass of the MC remains the same.

The higher the speed, the more severe.

<GTR>

unladen

both

connected

2-b. Severity comparison of FMVSS and Japan

FMVSS : 192km/h

Japan : 160km/h

2-c. Result

FMVSS is more severe than Japan.

After 1 mile

of full accel.

up to a max of

192 km/h.

5.8

IMMA Brake Harmonization Task Force

?


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(1) Comparison of requirements in FMVSS/ECE/Japan

3.Severity comparison for vehicle behaviour

  • Stable behaviour in the high-speed (160km/h) test is required in both ECE 78 and Japan’s regulation.

GTR

unladen

both

connect

160km/h or

The assessment is made from 160km/h

Vmax * 0.8,

whichever is

less

5.8

Yes

IMMA Brake Harmonization Task Force


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(2) Summary of the most severe requirements in the current high-speed tests

<GTR>

Test condition

・Weight

unladen

・Brakes

both

・Engine

connected

192km/h or

Vmax * 0.8,

・Speed

whichever is

less

Requirement

5,8 (m/s2)

・Deceleration

)

・Behaviour

Yes

IMMA Brake Harmonization Task Force


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Report items (continued) current high-speed tests

  • High speed test evaluation

  • Control layouts:

    • Brake by wire gives new possibilities

    • Overlap with GRSG

  • Burnishing and the pre-burnishing test

  • Maximum and minimum lever force efforts

  • Status of IMMA work and future actions

IMMA Brake Harmonization Task Force


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Status of IMMA work and future activities current high-speed tests

  • Severity comparisons completed on:

  • Dry test, heat-fade test, wet test and high speed test

  • Now examining the general specifications

  • Target: an outline of the technical requirements for a GTR at 51/GRRF

IMMA Brake Harmonization Task Force