DATA PD SV13.., SV14.. Levelling Valves. Product. Function. Technical Features. Range Overview

Transcription

1 Commercial Vehicle Systems Product DATA SV.., SV.. Doc. No. Y075 (Rev. 00) PD Function On vehicles fitted with air suspension, the Levelling Valve ensures that the axle suspension air bags maintain a constant chassis height irrespective of the vehicle load. with the Height Limitation feature prevent the chassis height being manually raised above a set limit. with the Second Ride Height feature allow the driver to pneumatically signal the valve and raise the chassis to an alternative ride height. Cross Throttling prevents the rapid flow of air between the two outlet ports (left and right side of the vehicle). SV85 SV7 SV95 Technical Features Maximum Operating Pressure: bar Operating Temperature Range: -0 C to +80 C Weight: 0.7 kg approx. Lever length: 00 mm Lever design: Round, with rubber joint Standard Symbol as DIN ISO 9 SV95 SV60 SV65 SV85 Range Overview Part No. Type No. Replaces Second Ride Height (preset) Height Limitation (adjustable) Secondary Exhaust SV 07 II95 ) SV95 SV07 SV8 I996 ) SV8 II05 SV II90 SV7 7.5 II6088 ) SV60 SV66 SV 6 II6 SV65 SV0, ) with II65 SV66 SV0, ) with SV 8 K00067 SV ) with K0067 5) SV ) with SV SV7 The rubber joint at the lower end of the vertical linkage is available separately: Part Number: K0006 ) Standard valve without additional features ) Without additional features, higher volumetric flow SV 6 ) Standard valve without additional features, plastic body ) Height Limitation adjustable, see adjustment instructions 5) Ports and are fitted with blanking plugs SV Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax: Item No. K009

2 PD SV.., SV.. Product Data Doc. No. Y075 (Rev. 00) Instructions for adjusting the height limitation (applies to the following levelling valves: SV6, SV6, SV6, SV66 and SV85) Levelling valves with Height Limitation shut off the air supply to the Raise/Lower valve at a certain angle of the lever and thereby limit the maximum chassis height. This angle is supplied pre-set to 5 but can be adjusted within the range 0 to 50. Note: If the adjustment range is not sufficient, the lever length can be changed (see pages and ). The adjustment is carried out as follows:. Pressurise ports and with minimum 6 bar. Pull off the protection cap from the adjustment screw. See Fig.. Raise the chassis with the Raise/Lower valve. See Fig.. Is the maximum permitted height being exceeded? no yes 5. Raise chassis until height limitation becomes active. See Fig. c. Turn the adjustment screw of the levelling valve with a mm Allen Key for half a turn anti-clockwise - see NOTE. See Fig. b. Lower the chassis several cm. See Fig. a. Immediately move Raise/Lower Valve to STOP position. See Fig. NOTE: Caution! Max. torque. Nm! Turning the screw by 60 is equivalent to approximately change of the lever angle 6. Leave Raise/Lower Valve in Raise -position 7. Turn adjustment screw with a mm Allen Key - see NOTE: clockwise to increase maximum chassis height counter-clockwise to decrease maximum chassis height Fig. 8. Re-check the adjusted height limitation by lowering the chassis and raising it again Push in for adjustment 9. Move Raise/Lower Valve lever back to driving position. See Fig. 0. Replace protection cap and ensure correct fitting. See Fig. ) For some part numbers the control logic is vice versa Fig. Lower ) Raise ) Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax: Item No. K009

3 Commercial Vehicle Systems Doc. No. Y075 (Rev. 00) SV.., SV.. PD Second Ride Height and Height Limitation features: Calculation of the correct lever length When the Second Ride Height feature is activated, further angular travel of the lever is permitted and the chassis rises to a higher position; the increase in angle is a fixed value for each valve. If the lever length is changed, the second ride height can be further adjusted. The Height Limitation feature is adjusted using the integrated hexagon socket (see instructions on page ). For cases where the adjustment range is not sufficient, additional height can be achieved by increasing the lever length. The quotient of Lever Length and Height Limitation must be in the range. to.9. The following formulae for calculating the lever length will give an approximate value for the static condition. Type No. Second Ride Height (RH) Height Limitation (HL) SV65 L =.8 x RH. L HL.9. L HL.9. L HL.9 HL SV66 SV85 SV L = 5.8 x RH L =.8 x RH RH SV7 L =. x RH Example: Second Ride Height for SV85: RH (requested) = 0 mm HL (requested) = 00 mm L = 5.8 x 0mm = mm L = mm = HL 00 mm. When the angle of the height limitation is reached, the valve is in the following condition: connection closed connection closed secondary exhaust for open RH RH...9 Type No. SV SV7 SV65 SV66 SV85 Second Ride Height [α] Height Limitation [β] Legend: L = Lever length of Levelling Valve RH = Ride Height (height of the chassis while driving with the Levelling Valve lever in the horizontal position) RH = Second Ride Height (increased chassis height above RH when pressurising port, e.g. when driving with a lift axle raised) HL = Height Limitation (maximum possible chassis height above RH when operating the Raise/Lower Valve) Item No. K009 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax:

4 PD SV.., SV.. Product Data Doc. No. Y075 (Rev. 00) Graphic Diagram for determining the Chassis height change X and the lever length L 0 on the basis of a horizontal lever position: x = L x sin α 00 L α X α = Example: Lever length L = 00 mm Angle α =0 } Chassis height change X=00 mm 50 Lever angle α [ ] Lever length L [mm] Chassis height change x [mm] Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax: Item No. K009

5 Commercial Vehicle Systems Doc. No. Y075 (Rev. 00) SV.., SV.. PD Performance Charts SV60 V [l/s] SV95 x V [l/s] 5 x x 0 x x x 8 x 6 x -α [ ] a [ ] -α [ ] a [ ] SV8 SV SV7 V [l/s] SV65 SV66 SV85 V [l/s] x 0 8 x x 0 8 x x 6 x x 6 x -α [ ] a [ ] -α [ ] a [ ] Legend: = Free Air in Litres/sec. [l/s] = Lever Deflection in degrees when exhausting [ ] = Lever Deflection in degrees when charging [ ] = Volume of flow through one port = Volume of flow through two ports at 6 bar } supply pressure Item No. K009 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax:

6 PD SV.., SV.. Product Data Doc. No. Y075 (Rev. 00) Dimensions SV95 Maximum Operating Angle 50 above or below horizontal Ø ± Charging Ø Mx V K For presetting the Valve, the lever can be temporarily held in the horizontal position by means of a mm dia. x 0 mm long pin. After setting, the pin MUST be removed A/F Lever must always be in the same direction as the location mark on shaft Mx.5 87 Ø Ø min 5 8 ± 8 A/F Ø 8 ± dia. for 6 dia. shaft Exhausting A/F (Torque to 0 ± Nm) 5 ~ ~00 00 SV60 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax: Item No. K009 6

7 Commercial Vehicle Systems Doc. No. Y075 (Rev. 00) SV.., SV.. PD SV8 ) SV SV7 Maximum Operating Angle 50 above or below horizontal 5 min 5 Ø ± 8 ± Charging Ø0 ±0. M x.5 6 ±0.5 0 ±0.5 A/F ±. ± Mx.5 ± ± 60 ±.5 A/F A/F 0. Ø9.5 ±0. M x.5 5 ±0. For presetting the Valve, the lever can be temporarily held in the horizontal position by means of a mm dia. x 0 mm long pin. After setting, the pin MUST be removed Ø8.5 ±0. Ø Ø 8 ± Ø 6 Exhausting Ø0 ± ± ± ±.5 9 ± ±0.6 Lever must always be in the same direction as the location mark on shaft 00 ± 0 A/F 8 A/F (Torque to 0 ± Nm) ) Port not used Item No. K009 Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax:

8 PD SV.., SV.. Product Data Doc. No. Y075 (Rev. 00) SV65 SV66 ) SV85 ) Knorr-Bremse Systeme für Nutzfahrzeuge GmbH. Moosacher Straße Munich. Germany. Tel: Fax: Item No. K009 8