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In a conventional engine, the fresh fuel/air mixture is prepared
upstream of the cylinder (whether by carburetor or conventional
port fuel injection) and enters the cylinder during the intake stroke,
with the intent of forming a homogenous mixture of air and fuel
within the cylinder. The application of OCP™ technology enables
a highly stratified combustion process to occur, containing the
combustible fuel cloud to a small area within the cylinder, with
the remainder of the air in the cylinder not being fuelled.
This process at light loads allows engines
with OCP™ to run very lean (in some cases total engine operation
is carried out without the use of an air intake throttle). Under
high load conditions, the OCP™ system runs similar to a homogeneously
charged engine, with good mixing of the fuel/air mixtures within
the cylinder.
Key features of using OCP™:
- Electronic control over the level of in-cylinder
fuel stratification
- Minimising short-circuiting on 2-stroke engines
- Allowing lean operation on 4-stroke engines
- Injected fuel is more effectively atomised
using low pressure air than liquid only injection systems which
require higher operating pressures
- Faster evaporation of fuel drops, cleaner burn
- Reduced engine parasitic losses
- The air provided during the injection event
contributes favourably to improving EGR tolerance
- Reducing NOx production
- Improving fuel economy
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