Suzuki GSX R 1000 Page 24
INTAKE AND EXHAUST CONTROL
AND ENGINE MANEGEMENT SYSTEM
(4) Injector Angle
On the 2003 GSX-R1000, the fuel injector enters the throttle body at a steep angle, 60 degrees.
This layout delivers high combustion efficiency at all engine rpm.
By aiming the fuel injector at 60 degrees, half of the fuel spray from the injector hits the primary
throttle valve when the valve is halfway to fully open. This makes the fuel/air mixture more
homogenous and improves combustion efficiency and engine output at middle to full throttle.
At small primary throttle valve opening, the fuel spray from the injector does not hit the valve. But
fuel atomization is still good because the fuel spray is sprayed into a fast air turbulent created by
the SDTV system .
Better fuel atomization contributes to better throttle response, more efficient combustion and
reduced emissions.
Intake and Exhaust Control and Engine Management Systems
3-9
Secondary
butterfly valve
Primary butterfly
valve
60°
Secondary
butterfly valve
Primary butterfly
valve
60°
When valve is between halfway to fully open
When valve is less than halfway open
