CRANK UP THE SALES
OPPORTUNITIES
BGA explains importance of crankshaft pulleys, the technology
and the opportunities their range present.
More engines today are being downsized in order to meet increasingly
stringent CO2 emission standards. Smaller engines combined with a
reduction in power-to-weight ratios has resulted in the need for lighter
crankshafts. The lightweight crankshaft has led to the possibility of
increased vibration when the engine is running.
SMOOTH RUNNINGS
Located outside the engine block,
the crankshaft pulley is essential to
ensure other engine components
operate in unison to allow the
vehicle to run smoothly. Doubling
up as an internal dampener,
crankshaft pulleys also reduce
the risk of damage to certain engine components as they reduce the
vibrations caused as the engine runs.
De-coupled Pulley (DcP)
The de-coupled torsional/harmonic damper/balancer pulley
commonly shares the same type of element for vibration as the HbP.
It also has a secondary de-coupled element that is indirectly driven by
the centre mounting assembly.
DIVERSE RANGE FOR MORE SALES OPPORTUNITIES
There are more than 4,700 crankshaft pulley and pulley kit applications
in BGA’s range that covers popular vehicle manufacturers such as Audi,
BMW, Fiat, Ford, Jaguar, Land Rover, Vauxhall and VAG. This provides
motor factors the scope to adequately cater for the diversity of their
customers’ needs.
THE MECHANICS OF POWER
The ECU determines when or if combustion is to occur. This is controlled
down to each cylinder, allowing for greater control of emissions and
improved performance. As the engine has no single dedicated point for
combustion, two undesired by-products are created in this process –
harmonic vibration and torsional twisting of the crankshafts.
By using the latest technology, BGA is able to reduce vibration, noise
and torsional twisting that is generated in the engine.
There are two main types of crankshaft pulleys within the BGA range:
BGA crankshaft pulley kits ensure that installers are no longer
burdened with having to source the correct crank pulley bolts and
have the peace of mind in knowing that the correct and highest quality
variant has been used.
Harmonic damper/balancer Pulley (HdP/HbP)
The centre assembly has an et hylene propylene diene monomer
(EPDM) rubber isolator element attached to the outer assembly/belt
drive ribs.
Simpler HbP’s are commonly used in petrol engines as combustion
pressures are lower than diesel. Thus, the greatest requirement from
the pulley is to re-tune the resonance frequency to a range that is
not destructive to components within the engine (e.g. crankshaft,
camshaft, water pumps, oil pump and timing chain/belt).
VITAL NEWS ISSUE 50
IMPORTANT
The majority of crank pulley bolts are Torque to Yield (TTY). This
means that once fitted, they are tightened close to their elastic limit.
As a result, they should only be used once and not be re-fitted. If
re-used, the bolts are susceptible to snapping and the chance of
failure is greatly increased.
Available from FPS via same/next-day delivery, speak to your local FPS
representative for more information.
WINDOW REGULATORS 17