GME L-9A-15-1987 Mechanical Efficiency of Rack and Pinion Steering Gear.pdf

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1、GME -TEST PROCEDURE NO. L-9A-15 Ausgabedatum /date of issue 15 FE 87 Seite/page I Test : Wirkungsgrad Zahnstangenlenkgetriebe Versuchszweck : Bestimmung des Eindreh- und des Rckdreh- Ausrstung : 1. Gewichte bis 300 kg Wirkungsgrades . 2. Drahtseil zum Anhngen der Gewichte 3. Drehmoment-Meeinrichtung

2、 fr Ritzelmoment mit fhertragungselement fr Lenkwinkel 4. 10-Wendel-Drehpotentiometer 5. Anpaeinheit fr Lenkwinkelmessung 6. Tragerfrequenzmeverstrker 7 . x-y-Rekorder Das Schema eines Yeaufbaus ist in der Anlage gezeigt Testverfahren : 1. Lenkgetriebe nach Zeichnungsvorschrift ein- stellen, Spursta

3、ngen montieren 2. Lenkgetriebe in Vorrichtung einspannen und Mekette (Drehmoment-Meeinrichtung, Dreh- potentiometer usw.) anschlieen 3. Durchdrehmoment E Reibung Lenkgetriebe von Anschlag zu Anschlag hin und zurck messen 4. Drahtseil an einer Spurstange anbringen und nacheinander das Ritzeldrehmomen

4、t beim Anheben - und Absenken der Gewichte (25, 50, 100, 150, 200, 250 und 300 kg) messen. Zu messen ist von Anschlag zu Anschlag, hin und zurck. 5. Drahtseil an anderer Spurstange befestigen und wie unter 4. beschrieben verfahren 6. Wirkungsgrad berechnen: 6.1 Eindrehwirkungsgrad (Anheben der Gewic

5、hte) Die Kraftrichtung entspricht der beim Ein- lenken in eine Kurve c-7 FG w Gleichung: 9 E = MdR GME -TEST PROCEDURE NO. L-9A-75 Ausgabedatum /date of issue 1 5 FE 87 Seite/page 2 2 E = Eindrehwirkungsgrad -I FG = Gewichtskraft = Gewi ht G x Erdbeschleunigung g EN rw = Walzkreisradius m MdR = Ritz

6、eimoment LNm 6.2 Ruckdrehwirkungsgrad 9 A (Absenken der Gewichte) Die Kraftrichtung entspricht der beim selbstttigen Zurcklaufen des Lenkrades am Ende einer Kurve. i- 7 MdR 2 R= F x rw Gleichung: Anforderung : Die Wirkungsgrade mssen innerhalb der in der Zeichnung angegebenen Toleranzbander liegen.

7、Meauf bau 1 TEST : MECHANICAL EFFICIENCY OF RACK AND PINION STEERING GEAR 1 mirpose The purpose of this specification is to determine the forward and reverse mechanical efficiency of a rack and pinion steering gear 2 2.1 2.2 2.3 2.4 2.5 2.6 2.7 2.8 3 3.1 Equipment Weights from 25 to 300 kg Wire rope

8、 to suspend the weights Torque measuring device for pinion torque, also ca- pable of transmitting steering angles Potentiometer having a large measuring range Adjusting unit for steering angle measurement Carrier frequency test amplifier X-Y recorder A diagram of the test setup is shown on page Proc

9、edure Adjust steering gear to drawing specification and in- stall tie rods Opel. Form 66484-1 GME -TEST PROCEDURE NO. L - 9 A - 15 Ausgabedatum /date of issue 1 5 FE 87 Seitelpage 2 3.2 3.3 3.4 3.5 6 6.1 Mount steering gear on fixture and connect measur- ing chain (torque measuring device, potentiom

10、eter, etc.) Measure pinion turning torque from lock to lock in both directions Attach wire rope to one of the tie rods and measure the pinion torque when lifting and lowering the weights (25, 50, 100, 150, 200, 250 and 300 kg). Take measure- ments from lock to lock in both directions Attach wire rop

11、e to the other tie rod and proceed as described under 3.4 Calculation of mechanical efficiency Forward mechanical efficiency (lifting the weights) The force direction corresponds with that in cornering F x rw E3 G Equation: tE = MdR - ?-E FG = r= W MdR= forward mechanical efficiency E- weight force

12、= weight G x acceleration due to gravity g NI radius of rolling circle m pinion torque LN Opel, Form 66484-1 GME -TEST PROCEDURE No. L - 9 A - 15 Ausgabedatum/date of issue 15 FE 07 Seite/page 3 6.2 7 (lowering the weights) %A Reverse mechanical efficiency The force direction corresponds with that during steer- ing return after cornering Equation: - MdR R-F G xr, Requirements The forward and reverse mechanical efficiency of a rack and pinion steering gear must be within the tolerance ranges indicated on the drawing Opel. Form 66484-1

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