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4.9
FUEL INJECTION
4
Fuel Lines - Quick Connect
RANGER
EFI models use quick connect fuel lines. Refer to the
steps below for fuel line removal.
1.
Place a shop towel around the fuel line to catch any
dripping fuel. Squeeze the connector tabs together and
push the locking slide back.
2.
Pull on the fuel line for removal.
3.
To install the line, verify the connector and fuel tank nipple
are clean and free of debris.
4.
Snap the fuel line back over the nipple and slide the locking
mechanism back into place. Verify the connector tabs snap
back into place.
ELECTRONIC FUEL INJECTION
Principal Components
The Electronic Fuel Injection (EFI) system is a complete engine
fuel and ignition management design. This system includes the
following principal components:
• Fuel Pump
• Fuel Rai
l
• Fuel Line(s)
• Fuel Filter(s)
• Fuel Injectors
• Pressure Regulator
• Throttle Body / lntake Manifold
• Engine Control Unit (ECU)
• Ignition Coils
• Coolant Temperature Sensor
• Throttle Position Sensor (TPS)
• Crankshaft Position Sensor (CPS)
• Intake Air Temperature and Barometric Air
Pressure Sensor (T-BAP)
• Wire Harness Assembly
• Check Engine Light
EFI Operation Overview
The EFI system is designed to provide peak engine performance
with optimum fuel efficiency and lowest possible emissions.
The ignition and injection functions are electronically
controlled, monitored and continually corrected during
operation to maintain peak performance.
The central component of the system is the Bosch Engine
Control Unit (ECU) which manages system operation,
determining the best combination of fuel mixture and ignition
timing for the current operating conditions.
An in-tank electric fuel pump is used to move fuel from the tank
through the fuel line and in-line fuel filter. The in-tank fuel
pressure regulator maintains a system operating pressure of 39
psi and returns any excess fuel to the tank. At the engine, fuel is
fed through the fuel rail and into the injectors, which inject into
the intake ports. The ECU controls the amount of fuel by varying
the length of time that the injectors are "on." This can range from
1.5-8.0 milliseconds depending on fuel requirements. The
controlled injection of the fuel occurs each crankshaft
revolution, or twice for each 4-stroke cycle. One-half the total
amount of fuel needed for one firing of a cylinder is injected
during each injection. When the intake valve opens, the fuel/air
mixture is drawn into the combustion chamber, ignited. and
burned.
The ECU controls the amount of fuel being injected and the
ignition timing by monitoring the primary sensor signals for air
temperature, barometric air pressure, engine temperature, speed
(RPM), and throttle position (load). These primary signals are
compared to the programming in the ECU computer chip, and
the ECU adjusts the fuel delivery and ignition timing to match
the values.
During operation the ECU has the ability to re-adjust
temporarily, providing compensation for changes in overall
engine condition and operating environment, so it will be able
to maintain the ideal air/fuel ratio.
During certain operating periods such as cold starts, warm up,
acceleration, etc., a richer air / fuel ratio is automatically
calculated by the ECU.
Squeeze Connector Tabs
Содержание 2008 ranger 700 xp
Страница 1: ...POLARIS RANGER XP 700 4X4 RANGER 6X6 SERVICE MANUAL ...
Страница 3: ...POLARIS RANGER XP 700 4X4 RANGER 6X6 SERVICE MANUAL ...
Страница 15: ...1 12 GENERAL INFORMATION SAE Tap Drill Sizes Metric Tap Drill Sizes Decimal Equivalents ...
Страница 118: ...4 8 FUEL INJECTION FUEL TANK Exploded View Fuel Flow ...
Страница 136: ...5 4 BODY STEERING SUSPENSION Lower Body Components ...
Страница 302: ...10 19 ELECTRICAL 10 COOLING SYSTEM Cooling System Break Out Diagram EY N 6OLT 0OWER ...
Страница 327: ...11 1 WIRE DIAGRAM RANGER 700 EFI 4X4 6X6 CHASSIS PAGE 1 OF 2 ...
Страница 328: ...11 2 WIRE DIAGRAM RANGER 700 EFI 4X4 6X6 CHASSIS PAGE 2 OF 2 ...
Страница 329: ...11 3 WIRE DIAGRAM RANGER 700 EFI 4X4 6X6 DASH ...
Страница 330: ...11 4 WIRE DIAGRAM RANGER 700 EFI 4X4 6X6 BREAKOUTS ...