Disc Brake Pads Kawasaki Ninja 250R

Transcription

Haugweg 24
D-71711 Murr / Murr
Disc Brake Pads
Kawasaki Ninja 250R
Page1
Make year 2008 - 2012
Release 05.07.13
QC Krauss friction test
APPLICATION OF A TEST PROCEDURE FOR
QC TESTING OF MOTORCYCLE DISC BRAKE PADS ON A
KRAUSS FRICTION TESTER
RECOMMENDED PRACTICE
Editor
:
Peter Krauss
Release
:
01
Date
:
04.06.2013
Krauss GmbH
Haugweg 24
D-71711 Murr
Tel. (+49)7144-8099-0
Fax. (+49)7144-8099-19
E-Mail [email protected]
www.kraussgmbh.de
Index
No. Modifications
Page(s)
Date
Editor
1.
1-6
05.07.2013
PK
New created
P:\5\102-27-FMT Motorradbeläge\TECH\PV\01-13-Kawasaki Test Spec.Doc
 Alle Rechte bei Krauss GmbH. Jede Verfügungsbefugnis, wie Kopier- und Weitergaberecht bei uns.
Haugweg 24
D-71711 Murr / Murr
Disc Brake Pads
Kawasaki Ninja 250R
Page2
Make year 2008 - 2012
Release 05.07.13
1. Application
Test instructions for series control (batch control) of disc brake pad quality. The
performance and wear is monitored. The test is run on a Krauss friction tester with
constant drag speed and constant torque.
Vehicle : Kawasaki Type Ninja 250R – Year 2008 – 2012
2. Test samples
a)
Caliper
Kawasaki Ninja 250 R
Piston diameter
Effective piston diameter
Piston surface
b)
article part no.
27 (2x)
38,17
11,45
43080-0093-GN
[mm]
[mm]
[cm²]
article part no.
D= 290
d= 4,6
d= 4,0
rm= 130
1,28
41080-0113-11H
[mm]
[mm]
[mm]
[mm]
[kg]
Pad area
article part no.
15
43082-0081
[cm²]
Test parameters
M1 = 140 Nm
M2 = 251 Nm
M3 = 278 Nm
Disc
Disc rotor diameter.
Disc rotor thickness.
Disc rotor min. thickness.
Friction radius
Mass of rotor
c)
d)
Brake pads
The parameters have been gained by
experimental trial tests in order to achieve the
temperature profile as required.
Haugweg 24
D-71711 Murr / Murr
Disc Brake Pads
Kawasaki Ninja 250R
Page3
Make year 2008 - 2012
Release 05.07.13
3. Test setup
For every material an own rotor must be used. Prior to testing the rotor shall conditioned (infected)
with the material to be tested. The infected rotors can be used until the thickness has reached ist
wear limit of min. 4,0 mm as specified for this type of disc. Then it must be replaced.
Pads must be tested with / without noise damping shims (please specify).
The air cooling nozzle must be at the opposite side from the thermocouple sliding shoe.
Cooling air
Thermocouple
4. Temperature detection
Sliding Shoe
The temperature is measured by a slicing shoe in the center of the friction ring of the
disc brake rotor.
Correct
setup
• Apply correct load to the shoe and verify if the temperature displayed under
room condition does not increase more than 5 °C when the drive is running at
660 rpm.
• Sliding direction must be correct
• Clean brake dust between disc and shoe
Page4
Disc Brake Pads
Kawasaki Ninja 250R
Haugweg 24
D-71711 Murr / Murr
Make year 2008 - 2012
Release 05.07.13
5. Disc rotor conditioning
For every material an own rotor must be used. Prior to testing, the rotor shall be
conditioned (infected) with the material to be tested. The infected rotors can be
regrinded until the thickness has reached its wear limit of min. 4,0 mm as
specified for this type of disc. Then it must be replaced.
6. Test procedure
Braking time
Interval time
Test speed
5,0 sec
10,0 sec
n = 660 +/- 10 /min = constant.
No cooling during the test cycles – only dust extraction.
Continuous cooling during bedding section allowed
Calculation friction value
Md
η= 0.95 for sliding caliper
µ=
2 x p x rw x A k x η
7. Test sequences
Program
group
Cycle
Brakings
Test torque
Md
TA
(°C)
TE*
(°C)
I. Bedding
1–6
5
M1
100
1. braking
<50°C
up to 250
Main group
II.
µ K1
7
5
M2
40
up to 350
III.
µ B1
8 – 10
5
M2
100
up to 350
IV.
µ F1
11
10
M3
100
up to 550
V.
µ B2
12 – 15
5
M2
100
up to 350
VI.
µ F2
16
10
M3
100
up to 550
VII.
µ B3
17 – 19
5
M2
100
up to 350
VIII.
µ K2
20
5
M2
40
up to 350
Total
110
*TE: Temperatures are approximate values, which result from the program. Pad wear is to
be determined by weighing and measuring, before and after every test run. Position and
number of pad wear measuring points are determined specifically for each project.
Haugweg 24
D-71711 Murr / Murr
Disc Brake Pads
Kawasaki Ninja 250R
Page5
Make year 2008 - 2012
Release 05.07.13
8. Evaluation
Assessment
To calculate frictional results only the actual measured values must be used and
not any specified values. The following values must be determined from the test
program:
Constants needed for calculation (e.g. rW) must be taken from the drawing.
- Cold friction
- Service friction
- Fading friction
- Minimum friction
- Maximum friction
- Pad wear
a)
µk1; µk2
µB1; µB2, µB3
µF1; µF2
µmin
µmax
VB
Cold and service friction levels
To calculate cold and service friction levels, so-called "instant friction values"
must be used. These are calculated by averaging all test results from 1 brake
operation measured in a window ± 0.1s centered on the time "80% + 1s".
(see figure below).
Picture – Evaluation of cold and service friction values
Haugweg 24
D-71711 Murr / Murr
Disc Brake Pads
Kawasaki Ninja 250R
Page6
Make year 2008 - 2012
Release 05.07.13
Cold friction values
Cold friction levels µk1; µk2 are the instant friction levels recorded for each first
brake operation in the first cycle of test program group II and the last cycle in test
program group VIII, respectively. All these cycles start at a brake temperature of
40°C.
Service friction values
The service friction levels are the "instant friction levels" of the first brake
operation of each cycle, with 100°C initial temperature, in test program groups III.,
V. and VII.
In each of the program groups III. and VII., three service friction levels are
determined; 4 levels are determined in group V. The individual results are then
combined into a mean result µB1, µB2, µB3 for each group.
b)
Minimal-, Maximal-, and Fading values
The evaluation of the minimum, maximum and fading friction levels is carried out
from the time "80% + 0,5s" until the "end of braking" signal is triggered by the test
stand computer. (see figure below).
Picture – Evaluation of cold min,- max- and fading values
Haugweg 24
D-71711 Murr / Murr
Disc Brake Pads
Kawasaki Ninja 250R
Page7
Make year 2008 - 2012
Release 05.07.13
Min friction value
The minimum friction value µmin is the lowest friction value which occurs in the
test program groups II to VIII. ( apart from block IV and VI ), measured in each
case from the time "80% + 0,5 sec." to the end of each braking.
Max friction value
The minimum friction value µmin is the lowest friction value which occurs in the
test program groups II to VIII measured in each case from the time
"80% + 0,5 sec." to the end of each braking.
Fading values
Fading friction values µF1& µF2 are the lowest friction levels recorded in the test
program groups IV. (fading 1) and VI. (fading 2) measured from the time "80% +
0,5s" to the end of each braking.
c)
d)
Other information
All observations made during and after the test (e.g. important smoke
development, pad separating from backing plate, cracking on the pad edges or
friction surface, break-outs, brake disc condition (hotspots, cracks) etc.) must be
noted.
Wear [g] / [mm]
The samples are measured and weighed before and after the test at 2 points.
1
2
Haugweg 24
D-71711 Murr / Murr
Disc Brake Pads
Kawasaki Ninja 250R
Page8
Make year 2008 - 2012
Release 05.07.13
9. Test Report Sample for Brake 2012 Kawasaki ZX

Disc Brake Pads Kawasaki Ninja 250R

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