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Gasoline Compression Ignition (GCI) is an advanced engine
technology, utilized low-octane gasoline in place of diesel in
the compression ignition (CI) engine. CI engine is more
efficient than the SI engine due to the high compression ratio
(CR). Gasoline is more volatile and offers high resistance to
the auto-ignition than diesel. Hence gasoline is more superior
fuel than diesel for homogeneous combustion. GCI technology takes
advantage of high compression ratio (CR) of the CI engine and
excellent characteristics of gasoline to form homogenous charge. Diesel ignites quickly in
the combustion due to the high cetane number. However, GCI combustion
provides more time for the homogenous mixing of the fuel-air
charge before the start of combustion (SoC) compare to diesel
combustion. Premixed charge helps in the reduction of engine-out soot
emission. A large amount of exhaust gas recirculation (EGR) can
be utilized for reduction of NOx emission in the GCI
engine. That's why it is much easier to cut the PM and NOx
emissions from the GCI engine. This promising technology is
under development in ERL. In first phase, a small 1L engine
prototype has been developed to run in GCI combustion mode.
Next, a heavy duty 3.0 L water cooled CRDI, turbocharged engine with 97mm bore,100 stroke length and
compression ratio of 17.5 will be used to expand the research
further.. The engine can produce maximum torque of 300 Nm at
1800-2000 rpm and has capability to produce 84.5 KW power at
3000 rpm. The objective will be
implementation of GCI technology on heavy duty CI engine. For this,
OEM ECU will be
replaced with Open ECU (MoTech). Along with sensor and actuators
calibration, new engine wiring will be installed. Different ECU
maps will be prepared as a part of engine tuning. Lastly
experiments for performance, emission and combustion on newly
developed engine will be done and results will be compared with
baseline results for CI engine. |
