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Modern chassis diagnosis issued on occasion of "automechanika 2004" - Frankfurt/Main Transverse force Tangential force KAMM - friction circle Suspension testing © 2004 all Copyrights by SAXON Prüftechnik GmbH
Modern chassis diagnosis issued on occasion of "automechanika 2004" - Frankfurt/Main What ?How ?Why ? E S mpmp Considering all components involved Involved Importance M 25% m Ca 35% Cs 10 % Cr 5 % Km 15 % Kr 10 % Need of vehicle - independent evaluation 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 Transverse force Tangential force KAMM - friction circle Security of the force transmission for steering and braking on the road
Modern chassis diagnosis issued on occasion of "automechanika 2004" - Frankfurt/Main Tasks and Goals Dynamic Stability for the whole vehicle Static Brake force B (N, kgf) Roller brake tester remaining Dynamic wheel load A (%) Suspension tester Separate, individual examinations * = Usable, dynamic transmission forces for steering and braking Complex diagnosis * Σ 1 4 ~ © 2004 all Copyrights by SAXON Prüftechnik GmbH
Modern chassis diagnosis issued on occasion of "automechanika 2004" - Frankfurt/Main Xo X E S mpmp ωMωM ωmωm M m EUSAMA* - Methode M - Chassis mass (damped mass) m – wheel suspension mass (undamped mass) K m – Spring wheel suspension mass C a – Damping shock absorber C s – Damping wheel suspension mass K r – Spring Tyre C r – Damping Tyre m p – Mass measuring plate S - Force sensor E - Eccentric with swing mass All values of interest: 3) ω M and ω m = Process and Resonance frequency M, m 4) S = Wheel load and process, Wheel load fluctuation between 25 Hz down to 0 Hz 1) Minimum and process of dynamic road holding force A 5) Interferences of m (f) (mathematically) All Components: M 2) = Mass relation value m Accord. EUSAMA recommendation TS-02-76, Weight fluctuation between Hz, Exciter amplitute with 6 mm © 2004 all Copyrights by SAXON Prüftechnik GmbH * EUSAMA - European Shock Absober Manufacturer
Modern chassis diagnosis issued on occasion of "automechanika 2004" - Frankfurt/Main Chassis diagnosis 3) ω M and ω m = Process and Resonance frequency M, m 4) S = Wheel load and process, Wheel load fluctuation between 25 Hz down to 0 Hz 1) Minimum and process of dynamic road holding force A 5) Interferences of m (f) (mathematically) M 2) = Mass relation value m Dynamic reduction of the Road holding force A Ordi- nate Recognition of the vehicle category and its standard tuning Spring-Damping-Function Spring rate for wheel suspension / tyre Irregularities of the oscillations amplitute "m" Abscissa ωmωm ωMωM KmKm KrKr ωBωB B © 2004 all Copyrights by SAXON Prüftechnik GmbH
Modern chassis diagnosis issued on occasion of "automechanika 2004" - Frankfurt/Main Graphical Evaluations SuspensionSidslipBrakes Dynamic and static Wheel load front axle Dynamic and static Wheel load rear axle Wear analysis for chassis system whole vehicle Static Brake force, Imbalance, Ovality, left and right Service brake front axle Static Brake force, Imbalance, Ovality, left and right Service brake rear axle Static Brake force, Imbalance, Ovality, left and right parking brake 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 Wear - Examples Example 1 Spring rate o.k., both shock absorbers (front) requiring urgent replacment Diagonal conflict! Good dynamic values, limit value excess by loose suspensions Dangerous ! Nearly new Slightly wrong Heavyly wrong inoperative M/m A VL Wheel suspension front / left VR Wheel suspension front / right HL Wheel suspension rear / left HR Wheel suspension rear / right Right side of vehicle Left side of vehicle Generally recognised limit values for vehicles of different classes in accordance with the mass relationship Vehicle evaluation Tabular after classes Graphically using a matrix Example 2 © 2004 all Copyrights by SAXON Prüftechnik GmbH
Modern chassis diagnosis issued on occasion of "automechanika 2004" - Frankfurt/Main Products availible Cover plates are accuratly positioned over installation frame to maintain a good finish, all parts are galvanized 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 A set of installation frames are always include for easy, cost efficient and accurate foundation set-up Suspension Tester FW 67 / 70 Vehicle Test Lane FPS 2000 / 2600 for Vehicle class IV < 3,5 to. Vehicle class VII < 7,5 to. © 2004 all Copyrights by SAXON Prüftechnik GmbH
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