2.3.3 System Working Principle
2.3.3.1 System Working Principle
Intake manifold absolute pressure sensor senses and
measures intake manifold vacuum. When the fuel demand is
high, the intake manifold absolute pressure in a low-vacuum
state, such as the throttle fully open. Engine control module
uses this information to enrich the mixture, thereby increasing
the fuel injector opening time and injecting the correct amount
of fuel. When the engine decelerates, the intake manifold
absolute pressure sensor detects increase in the vacuum
degree, the engine control module requests to shorten the fuel
injector opening time, reducing the amount of fuel injection
according to the change.
1. Startup Mode
When the ignition switch is turned on, the engine control
module connects to the fuel pump relay 2 s. Then, the fuel
pump fuel pressure is established. Engine control module also
Check the engine coolant temperature sensor and throttle
position sensor to determine the most appropriate Air-Fuel ratio
to start the engine. Engine control module controls the fuel
supply by changing the fuel injectors opening and closing time.
This is achieved by controlling the fuel injectors with very short
pulses.
2. Acceleration Mode
Engine control module responds to throttle position and the
rapid changes in airflow and provides additional fuel.
3. Deceleration Mode
Engine control module responds to throttle position and gas
flow rate changes and reduces the fuel amount. When the
speed rapidly decreases, the engine control module can
completely cut off fuel supply.
4. Battery Voltage Calibration Mode
When the battery voltage is too low, the engine control module
uses the following methods compensate for a weak ignition
spark:
–
Increase fuel injector pulse width.
–
Increase idle speed.
–
Increase the ignition duration.
5. Stop Fuel Supply
When the ignition switch is turned off, the fuel injector will not
provide fuel. This prevents the continued combustion or engine
can not shut down. In addition, if the reference pulse is not
received, there will be no fuel supply, in order to prevent fuel
overflow.
Engine
Fuel System JL4G18-D
2-225
EC718/EC718RV EC715/EC715RV 10/2009
Содержание EC715 2009
Страница 4: ......
Страница 312: ...2 3 4 5 Fuel Injectors FE02 2022b 2 230 Fuel System JL4G18 D Engine EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 330: ...Next Step 10 End 2 248 Fuel System JL4G18 D Engine EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 516: ...2 7 4 3 Front Muffler Assembly FE02 2032b 2 434 Exhaust System JL4G18 D Engine EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 517: ...2 7 4 4 Rear Muffler Assembly FE02 2033b Engine Exhaust System JL4G18 D 2 435 EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 519: ...2 7 4 6 Front Muffler Heat Shield FE02 2034b Engine Exhaust System JL4G18 D 2 437 EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1164: ......
Страница 1257: ...Next Step 9 System normal Brake System ABS TCS EBD ESP 6 93 EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1278: ...6 7 8 Special Tools and Equipment 6 7 8 1 Trigger Tool FE06 1007b 6 114 TPMS Brake System EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1412: ...9 2 6 4 Warning lamp Always On Schematic 9 14 Airbag System Safety Protection Device EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1703: ...Rear Wiper Motor Hatchback FE11 2009c Body Electric Wipers Washers System 11 219 EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1704: ...Washer Fluid Tank Sedan FE11 2010b 11 220 Wipers Washers System Body Electric EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1705: ...Washer Fluid Tank Hatchback FE11 2010c Body Electric Wipers Washers System 11 221 EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1706: ...Rear Washer Nozzle Hatchback FE11 2011c 11 222 Wipers Washers System Body Electric EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1734: ...Next Step 13 System normal 11 250 Wipers Washers System Body Electric EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1860: ...BCM FE11 0803b 11 376 Remote Anti theft System Body Electric EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1951: ...Reverse Radar Control Module FE11 1207b Body Electric Reverse Radar 11 467 EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 1954: ...16 R Control Module Power Supply Gear In Reverse 12 V 11 470 Reverse Radar Body Electric EC718 EC718RV EC715 EC715RV 10 2009 ...
Страница 2008: ......
Страница 2104: ...FE12 0085c 2 Install the hatchback seal 12 96 Interior Trim Body Sheet Metal and Painting EC718 EC718RV EC715 EC715RV 10 2009 ...