Press Conference
The AMS Braking
g Test
Boxberg, October 8, 2009
Dr. Andreas Giese,
Director Global Engineering Test
AMS Test
• the AMS test is an international well recognized test named after the German
automotive journal “Auto Motor Sport”
• it is a “simple” brake performance test
• basically the test should simulate a mountain test of a full loaded car
• main test parameters: stopping distance, rotor temperature (front, rear)
but much more data are acquired:
e.g. pedal travel, deceleration, velocity, brake
pressure
2
AMS Test - Definition
Test Procedure:
10 brake stops from 100 to 0 km/h:
1 max.
1.
max acceleration to 100 km/h
2. max deceleration (ABS
(ABS--braking on the wheels) until 0
km/h
3. perform next stop (go to 1.)
vehicle must be fully loaded (max. gross vehicle weight)
Tinitial= 50
50--100
100°°C
3
AMS Test - Definition of one stop
v
[km/h]
100
38 m
Rottor Temperatture [C°
[C°]
Sto
opping dista
ance [m]
102°C
89°C
0
time
4
front
axle
rear
AMS Test – 10-Stop
10 Stop Procedure
max rotor temperature
front axle
rear axle
v
[km/h]
100
T
[°C]
700
1
2
3
4
5
Stop N
N°°
5
6
7
8
9
10
time
AMS Test – basic test result
60
max rotor temperature
front axle
rear axle
brake pad A
50
Stopping dis
S
stance [m]
brake pad B
40
30
20
10
0
1
2
3
4
5
Stop N
N°°
6
6
7
8
9
10
AMS Test – adjustment
In order to get a good adjustment to the test track/
observers we have modified the test:
the 10 AMS brake stops are embedded by
1. a cold stop (reference braking, 1st stop) and
2. a hot stop (very last stop)
7
The AMS - Test
the AMS
AMS--test is a challenging test to the
y
brake--system
brake
it is able to differentiate the performance of
brakes and it components
The AMSAMS-test is not part of the ECE R90 homologation
process;
all IAM brake pads launched into the European market
must be ECE R90 homologated
The ECE R90 is a set of minimum
minim m requirements
req irements to be met
8
Press Conference
Thanks for y
your attention
Boxberg, October 8, 2009
Dr. Andreas Giese,
Director Global Engineering Test