Transcript Saxon Sistemas Suspension asanetwork B2B

Modern chassis diagnosis
issued on occasion of "automechanika 2004" - Frankfurt/Main
Suspension
testing
Transverse force
KAMM - friction circle
Tangential force
© 2004 all Copyrights
by SAXON Prüftechnik GmbH
Modern chassis diagnosis
issued on occasion of "automechanika 2004" - Frankfurt/Main
What ?
How ?
Why ?
Involved
M
25%
m
Ca
35%
Cs
10 %
Cr
5%
Transverse force
KAMM - friction circle
Tangential force
mp
S
Km
15 %
Kr
10 %
E
The trend for a complex
chassis diagnosis with
SAXON:
• Accurate, repeatable examination
• Proofen by scientific facts
• Future-proof developement
• Internationally recognition
© 2004 all Copyrights
by SAXON Prüftechnik GmbH
Importance
Modern chassis diagnosis
issued on occasion of "automechanika 2004" - Frankfurt/Main
Tasks and Goals
Dynamic
Stability for
the whole
vehicle
Separate, individual
examinations
Complex diagnosis
4
Σ1
Static Brake
force „B“ (N, kgf)
Roller brake tester
*
*
~
=
remaining Dynamic
wheel load „A“ (%)
Suspension tester
Usable, dynamic
transmission forces for
steering and braking
© 2004 all Copyrights
by SAXON Prüftechnik GmbH
Modern chassis diagnosis
issued on occasion of "automechanika 2004" - Frankfurt/Main
EUSAMA* - Methode
All Components:
All values of interest:
Xo
M
M - Chassis mass
(damped mass)
ωM
m – wheel suspension mass
(undamped mass)
2)
m
Cs – Damping
wheel suspension mass
mp – Mass measuring plate
= Mass relation value
m
Ca – Damping shock absorber
Cr – Damping Tyre
Minimum and process
of dynamic road holding
force „A“
M
Km – Spring
wheel suspension mass
Kr – Spring Tyre
1)
mp
S
3)
ωM and ωm = Process and
Resonance frequency M, m
4)
S = Wheel load and process,
Wheel load fluctuation
between 25 Hz down to 0 Hz
5)
Interferences of m(f)
(mathematically)
Xo
ωm
X
E
* EUSAMA - European Shock Absober Manufacturer
S - Force sensor
E - Eccentric with swing mass
Accord. EUSAMA recommendation TS-02-76, Weight
fluctuation between 0 ... 25 Hz, Exciter amplitute with 6 mm
© 2004 all Copyrights
by SAXON Prüftechnik GmbH
Modern chassis diagnosis
issued on occasion of "automechanika 2004" - Frankfurt/Main
Chassis diagnosis
1)
Ordinate
Minimum and process
of dynamic road holding
force „A“
Dynamic reduction of the
Road holding force „A“
M
Recognition of the vehicle category and
its standard tuning
2)
= Mass relation value
m
3)
ωM and ωm = Process and
Resonance frequency M, m
Spring-Damping-Function
4)
S = Wheel load and process,
Wheel load fluctuation
between 25 Hz down to 0 Hz
Spring rate
for wheel suspension / tyre
Abscissa
ωM
ωm
Km
Kr
ωB
5)
Interferences of m(f)
(mathematically)
Irregularities of the oscillations
amplitute "m"
B
© 2004 all Copyrights
by SAXON Prüftechnik GmbH
Modern chassis diagnosis
issued on occasion of "automechanika 2004" - Frankfurt/Main
Graphical Evaluations
Suspension
Dynamic and static
Wheel load
front axle
Sidslip
Brakes
Static Brake force,
Imbalance, Ovality,
left and right
Service brake
front axle
Wear analysis for
chassis system
whole vehicle
Static Brake force,
Imbalance, Ovality,
left and right
parking brake
Dynamic and static
Wheel load
rear axle
Static Brake force,
Imbalance, Ovality,
left and right
Service brake
rear axle
Wear analysis for all
brake systems
whole vehicle
© 2004 all Copyrights
by SAXON Prüftechnik GmbH
Modern chassis diagnosis
issued on occasion of "automechanika 2004" - Frankfurt/Main
Example 2
Example 1
Wear - Examples
Vehicle evaluation
Tabular after classes
Graphically using a matrix
Nearly new
Slightly wrong
„A“
Heavyly wrong
M/m
inoperative
VL Wheel suspension front / left
VR Wheel suspension front / right
HL Wheel suspension rear / left
HR Wheel suspension rear / right
Generally recognised limit values
for vehicles of different classes in
accordance with the mass
relationship
Right side of vehicle
Good dynamic values,
limit value excess by
loose suspensions
Dangerous !
Spring rate o.k., both
shock absorbers (front)
requiring urgent
replacment
Diagonal conflict!
Left side of vehicle
© 2004 all Copyrights
by SAXON Prüftechnik GmbH
Modern chassis diagnosis
issued on occasion of "automechanika 2004" - Frankfurt/Main
Products availible
Suspension Tester FW 67 / 70
Vehicle Test Lane FPS 2000 / 2600
for
Vehicle class IV < 3,5 to.
Vehicle class VII < 7,5 to.
A set of installation frames are
always include for easy, cost
efficient and accurate
foundation set-up
Availible in both versions,
analogue display for all
tests, PC -Terminale for
analysis and data recording
Test equipment
designed for quick
installation and easyly
handable maintenance
and service,
can also be used as
split beds for a pit
installation
Cover plates are
accuratly positioned
over installation frame
to maintain a good
finish, all parts are
galvanized
© 2004 all Copyrights
by SAXON Prüftechnik GmbH