BMW K 1300 GT - Manual (Page 17)

BMW
Media
Information
10/2008
Page 17
With various functions being integrated and combined with one another,
the entire fuel supply system is extremely light. The three-piece injection rail
is made of plastic and comprises the fuel pressure sensor. The rod-shaped
high-energy ignition coils housed in the cylinder head, fi nally, help to make the
engine management system even more effi cient.
High compression and knock control for enhanced fuel effi ciency.
Fuel consumption of the K 1300 S at 90 km/h or 56 mph is 4.7 litres/100 km,
equal to 60.1 mpg imp, and increases at 120 km/h (75 mph) to 5.3 litres
(equal to 53.3 mpg imp) of premium plus. Considering the signifi cant increase
in power and performance, this again sets a new record in the sports motor-
cycle market. To a large extent this improvement is attributable to the
very high geometric compression ratio only possible with anti-knock control.
On the anti-knock control system two body sound sensors positioned
between cylinders 1 and 2 and, respectively, 3 and 4 determine even the
slightest knocking phenomena in the combustion process. The electronic
engine control unit will then respond immediately by taking back the
ignition angle (retarding the ignition), thus protecting the engine from possible
damage.
Conceived under regular conditions for unleaded premium plus (RON 98), the
engine, thanks to knock control, may also run on RON 95 premium without
any risk of damage and without requiring any manual intervention on the part
of the rider. Should the quality of fuel drop to an even lower level, however,
the engine will lose some of its peak power and fuel consumption will increase
accordingly.
The intake system – optimised air supply for
an optimum cylinder charge.
With the engine being tilted to a low angle, an airbox fi ts perfectly directly
above the engine. The four intake manifolds then lead directly and without
the slightest curvature into the airbox which, with its capacity of 10 litres,
makes yet a further contribution to the muscular power and high torque of
the K 1300 S.
The two funnels extending out straight to the front with perfect aerodynamics
thanks to the appropriate position of the airbox have been optimised for
even better and smoother fl ow conditions. They draw in air from right and left
beneath the headlight in the ram pressure section of the fairing even more
effi ciently than before, the ram air effect generated in this process enhancing
the degree of cylinder charge at high speeds on the road.