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ENGINE 273 MPFI
FEATURES OF 273 MPFI ENGINE
TATA 273 MPFI engine uses
BOSCH
Multipoint fuel
injection system. Various sensors located at various
points in the engine, sense important parameters of
the engine operation & send signals to a ECU located
in engine compartment. Based on predetermined
engine mapping, the ECU precisely controls the fuel
delivery injection timing to ensure optimum fuel
utilization with minimum emission.
TATA273 MPFI engine has following features:
Cranking Mode:
• Better Engine Performance
Optimum fuel quantity and Spark timing is
calculated by ECU for any operating condition.
•
Better Cold Starting and Warm up
ECU identifies cranking condition and quick starting
is ensured by providing sufficient fuel quantity and
optimum spark timing. For quicker warm up, idling
speed is increased as a function of Water and Air
temperature inputs to the ECU.
•
Good Startability due to Reduced Engine
Load
ECU identifies cranking mode & switches ‘OFF’
the A/C relay & CPV (Canister Purge Valve).
Idling Mode:
•
Better Idling Stability
ECU receives inputs from Water Temp., Engine
Load, Battery Voltage, Manifold Vaccum & Engine
Speed by closed loop control which facilitate ECU
to achieve better idle speed stability.
• Better Idling Stability whenever idle state changes
ISC Valve position (steps) is continuously
memorized & renewed in memory.
• ’LIMP HOME’ Idle Speed
Vehicle Downtime/Breakdown ProtectionAgainst
failure of following Sensor is achieved by ’LIMP
HOME’ Idle Speed feature.
1.Throttle Position Sensor (TPS)
2.T-MAP Sensor
3.Vehicle Speed Sensor
4.Water Temp. Sensor
Engine Stall Protection:
When engine RPM is low, ECU cuts A/C relay
which facilitate better idle stability & user
convenience.
Acceleration Mode:
• High Engine Speed Control
Fuel is cut beyond 5600 rpm to avoid adverse effect
on engine safety.
• High Vehicle Speed Control
Fuel is cut beyond
105 kmph
to avoid adverse
effect on vehicle safety.
• Variable Acceleration Enrichment
Transient condition is identified and suitable fuel
enrichment is provided.
•
Emission
The petrol injection engine has low emissions
because the air fuel ratio is controlled to
stoichiometric using lambda sensor. Faster warm
up from cold start ensures early operation of
catalytic converter in turn reducing the emission.
•
Fuel Economy
The 273 MPFI engine has a better fuel economy
because the engine is optimized at each operating
point, discretely.
•
Quick Response
The 273 MPFI engine will have a better driveability
and better acceleration since the fuel delivery and
spark timing are controlled by ECU, which quickly
responds to engine/Driver demands.