Exhaust Balancer

The Viböl Exhaust Vibration Balancer, an effective device offering a solution to engine exhaust system problems, was heralded a breakthrough in design excellence and received the SABS Design Institute Award in 2000.

The name Viböl is derived from “Engine Vibration Balancer” which is an invention describing the motion that balances the vibration, torque and road shock movement between a diesel engine and the exhaust system, and has no adverse effect on exhaust system back pressure or emission gas flow in any way.

Vibration caused by diesel engines in particular is the major contributing factor to metal fatigue and stress placed on the pivotal points in the exhaust system. When a vehicle is in motion uneven road surfaces and gear changes are further contributors to untimely breakages in exhaust manifolds, front header pipes, turbocharger housings and other exhaust system components.

The Viböl essentially consists of a male and female spherical coupling held together by two flanges and six springs positioned at 1200 angular displacement, by three bolts which pass through the flanges and springs. The inner and outer springs are designed to place a balancing force on the coupling so as to return the inlet and outlet pipes to their neutral position after being displaced by engine and chassis movement.

Viböl allows movement in three directions namely: axial, twisting and swivel movements while providing effective sealing of emission gas. The axial movement can accommodate up to 10mm displacement in and out of the centre position, while the floating flanges on the Viböl allow a twisting movement to take place between the inlet and outlet pipes. The spring arrangement also ensures that the Viböl returns to its neutral position every time a twisting (rotational) movement takes place. This feature relieves stresses and fatigue cracking of the exhaust system and silencer mounting brackets while remaining effective for the life of the Viböl, even in rough operating conditions where severe chassis twisting is experienced (off-road operating conditions).

The swivel movement (angular displacement) controls vibrations caused by gear changes and uneven road surfaces. For this reason, the flanges of the Viböl are not fixed to the inlet and outlet pipes. The six-spring arrangement ensures that the Vibol returns to its neutral position, and unlike normal exhaust flexible hoses, it performs this task throughout its operating life – up to 4 times that of conventional exhaust flex pipe.

Customer reported advantages for the Viböl include:

  • Reduced vehicle operating costs
  • Reduction in excessive exhaust system heat
  • Increased system durability
  • Increase in vehicle up time
  • Increase in engine power
  • Extended turbocharger life, all of which assist to improve profitability

Above: After 500 000 km of highway hauling at 56 tons GCM. Note good heat transfer through the Viböl... and perfect gas seal under extreme operating conditions.

As of May 2004, the following companies are using the Vibol coupling:

  1. CLOVER SOUTH AFRICA CAPE TOWN
  2. TRANSLUX CAPE TOWN (MAN BUSES)
  3. GOLDEN ARROW BUS COMPANY (MAN, LEYLAND, ERF)
  4. CITY OF CAPE TOWN MUNICIPALITY (LARGE VARIETY)
  5. SLABBERT BURGER TRANSPORT (MERCEDES)
  6. LANGS REMOVALS (MERCEDES)
  7. CAPE CONCRETE (MAN, LEYLAND & MERCEDES)
  8. DUENS BAKERY (NISSAN CAB STARS)
  9. VAN DER VYVER TRANSPORT ( FREIGHTLINERS, ARGOSY)
  10. PUTCO (CITY BUSES)
  11. ARMSCOR (MACS)
  12. STRASSCO PLANT HIRE (EARTHMOVING)
  13. SA METAL CAPE TOWN (MERCEDES)
  14. REYKO VERVOER (MERCEDES)
  15. J.F RETIEF TRANSPORT (MAN)
  16. SOUTH END TRUCKING (MAN, VOLVO)
  17. DISMAR CONSTRUCTION (MAN)
  18. POWER CONSTRUCTION (MERCEDES & EARTHMOVING)
  19. PIET FOURIE PLANT HIRE (EARTHMOVING)
  20. ALLIED CRANE HIRE (CRANE)
  21. TANDEM RIGGING ( MAN & CRANES)
  22. SA CRANE
  23. KINGS TRANSPORT (SCANIA)
  24. H & M REMOVALS (MAN, MERCEDES)
  25. UNITRANS GEORGE (MERCEDES)
  26. FREIGHT DYNAMICS MOSSEL BAY (MERCEDES)
  27. ALGOA BUS COMPANY (MAN, LEYLAND, ERF)
  28. EMMISSION CONTROL TECHNOLIGIES (MINING EQUIPMENT)
  29. TANDEM CRANES (CRANES)
  30. LOUBSER TRANSPORT (MAN)
  31. TG BRAAFF & SON TRANSPORT (MAN)
  32. VAN NIEKERK FISHERIES (FISHING BOATS)