Rotax V990: Difference between revisions
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Created page with " Pneumatic Power Clutch/slipper clutch/PBTL System details are in [https://www.apriliaforum.com/forums/showthread.php?65496-Aprilia-Rotax-and-V990&p=745935&viewfull=1#post745935 this apriliaforum post]. <blockquote> PBTL SYSTEM The PBTL system on the RSV 1000 reduces the ‘braking’ torque transmitted by the engine during deceleration. OPERATING PRINCIPLE: Line 1 is connected to the intake passage whereas line 2 – downstream of the retaining valve – is connecte..." |
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==Slipper Clutch== | |||
Pneumatic Power Clutch/slipper clutch/PBTL System details are in [https://www.apriliaforum.com/forums/showthread.php?65496-Aprilia-Rotax-and-V990&p=745935&viewfull=1#post745935 this apriliaforum post]. | Pneumatic Power Clutch/slipper clutch/PBTL System details are in [https://www.apriliaforum.com/forums/showthread.php?65496-Aprilia-Rotax-and-V990&p=745935&viewfull=1#post745935 this apriliaforum post]. | ||
Revision as of 00:13, 5 June 2026
Slipper Clutch
Pneumatic Power Clutch/slipper clutch/PBTL System details are in this apriliaforum post.
PBTL SYSTEM
The PBTL system on the RSV 1000 reduces the ‘braking’ torque transmitted by the engine during deceleration.
OPERATING PRINCIPLE:
Line 1 is connected to the intake passage whereas line 2 – downstream of the retaining valve – is connected to the airbox via the throttle valve. Line 3 links line 2 to the airbox when the throttle valve opens to an angle greater than 10-12 degrees.
During deceleration, the system configuration is as shown in the figure.
The negative pressure in the intake passages is transmitted to the clutch membrane via line 1+2.
The ‘retaining’ valve (non-return) comes into play and stabilises the pressure in the line.
Consequently, the clutch discs slip and reduce the torque.
During acceleration (throttle valve >12°), the valve, connected on the throttle unit axis, links up line 2 with the airbox, thus cancelling out the pressing effect on the clutch unit and taking the clutch pack back to its original position.