Facing Problem with Fuel

delivery system

Sensors also plays a role

Programmable

Control Module

Engine

Control Module Heart of Fuel Delivery System

Information received from PCM By certain

sensors

Used by Other sensors to change the parameter of

fuel delivery system

What will be the consequences if the computer stops working ..???

Vehicle run poorly

Run properly but lowers the fuel mileage

Information receiver sensors

Exhaust Gas recirculation sensor(EGR)

Coolant Temperature Sensor (CTS)

Idle Air Sensor (IAC)

Idle Air Sensor

What work it does ? Controls the idle of

engine

Work process of IAC

IAC increases the RPM of engine

Send information for more fuel

Continued………..

Computer sends fuel based on the air ration

No air circulation found when engine stops

Engine de-stall by the help of IAC

Coolant Temperature Sensor

Role of CTS

Informs about the temperature of engine

Lead to adjust the Fuel Mixture

CTS adjust the fuel-to-air ratio for cooling the temperature

Exhaust Gas recirculation sensor(EGR)

Work process of EGR

By the help of information

computer changes the time for more or

less fuel

The circulation of exhaust gas cools down the cylinder

Burns the unburned oxygen in the 2nd phase

Computer changes the parameter

with the help of EGR sensor

Does it affect the fuel delivery system ..??

Changes engine

temperature

Changes the percentage structure of air in the engine

EGR Effects on Fuel delivery

system

Then what does the feed

Information sensors actually

do..????

Actually these sensors measure the water

temperature , air temperature and the

amount of oxygen in the exhaust

Throttle Position Sensor

MAP Sensor

Crankshaft sensor

Oxygen Sensor

Water Temperature

Sensor

MAF Sensor

Water Temperature Sensor

Informs about the temperature of antifreeze

If the engine is cold then need more fuel than air

Informs the computer to change the ratio of air to fuel and add more fuel

Other work of WTS It cools down the engine and radiator by turning on the

electric fan

MAF Sensor

Work process of MAF sensor

Informs the computer about the percentage

of air enters the engine

Measures the density of air

Keep the proper air-fuel mixture that

produce more mileage

Throttle Position Sensor

Work process of Throttle sensor

Locate the position of throttle to avoid

idling

Informs about the spark timing and

available fuel mixture

MAP Sensor

Work process Informs the

computer about the engine load

Controls the fuel ratio while

engine is in idling position

Crankshaft Sensor

Informs about in what RPM the

engine is running

Work Process Adjust fuel delivery

Adjust ignition time

Make sure the spark from ignition ignites the fuel into the cylinder directly

Measures the Valve Timing

Oxygen Sensor

Informs about the

percentage of

unburned fuel in

exhaust

Work process of Oxygen Sensor

Adjust air-fuel ratio

Keeps the fuel consumption and

emission in low level

How to Know if the oxygen sensor is not working..???

Fuel Inadequacy

Engine burns more fuel than

required

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