4.8
FUEL INJECTION
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 (MIL)
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. 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.
Initial Priming / Starting Procedure
NOTE: The Injection system must be purged of all
air prior to the initial start up, and/or any time the
system has been disassembled.
If the EFI system is completely empty of fuel or has been
disassembled and repaired:
1.
Cycle the key switch from “OFF” to “ON” 6 times,
waiting for approximately 3 seconds at each “ON” cycle to
allow the fuel pump to cycle and shut down.
2.
Once step 1 is completed, turn the key switch to “START”
until the engine starts or 5 seconds has passed.
3.
If the engine failed to start, repeat step 1 for 2 more cycles
and attempt to start the engine.
If the engine fails to start, a problem may still exist, and should
be diagnosed.
NOTE: Accurate testing of EFI components is
recommended utilizing the Polaris Diagnostic
Software (dealer only).
Содержание Sportsman 800 EFI
Страница 4: ...NOTES ...
Страница 18: ...NOTES GENERAL INFORMATION 1 14 ...
Страница 25: ...2 7 MAINTENANCE 2 LUBRICATION FLUIDS SPORTSMAN Component Locations Sportsman Only Deluxe ...
Страница 55: ...2 37 MAINTENANCE 2 Maintenance Schedule Service Date Hours Miles Service Performed Serviced By ...
Страница 56: ...2 38 MAINTENANCE Maintenance Schedule Service Date Hours Miles Service Performed Serviced By ...
Страница 116: ...NOTES ENGINE 3 60 ...
Страница 137: ...4 21 FUEL INJECTION 4 EFI CIRCUIT Power On EFI CIRCUIT Crank Position Sensor ...
Страница 138: ...4 22 FUEL INJECTION EFI CIRCUIT Fuel Pump EFI CIRCUIT Throttle Position Sensor ...
Страница 139: ...4 23 FUEL INJECTION 4 EFI CIRCUIT Temperature Barometric Air Pressure Sensor EFI CIRCUIT Engine Temperature ...
Страница 140: ...4 24 FUEL INJECTION EFI CIRCUIT Malfunction Indicator Light ...
Страница 167: ...5 27 BODY STEERING SUSPENSION 5 X2 CARGO BOX Exploded View ...
Страница 170: ...5 30 BODY STEERING SUSPENSION X2 SEAT ASSEMBLY Exploded Views ...
Страница 174: ...NOTES BODY STEERING SUSPENSION 5 34 ...
Страница 206: ...NOTES CLUTCH SYSTEM 6 32 ...
Страница 244: ...7 38 FINAL DRIVE Rear Gearcase Exploded View ...
Страница 245: ...TRANSMISSION 8 1 CHAPTER 8 TRANSMISSION 8 SPORTSMAN 8 3 8 18 SPORTSMAN X2 8 19 8 38 ...
Страница 246: ...NOTES TRANSMISSION 8 2 ...
Страница 248: ...8 4 SPORTSMAN TRANSMISSION TRANSMISSION EXPLODED VIEW Sportsman Transmission ...
Страница 265: ...8 21 X2 Touring Transmission 8 242 262 262 262 262 262 ...
Страница 266: ...8 22 X2 Touring Transmission Mounting Exploded View x2 x3 x4 x4 x2 x1 x1 x1 ...
Страница 312: ...NOTES BRAKES 9 30 ...
Страница 322: ...10 10 ELECTRICAL SPEEDOMETER TROUBLESHOOTING Test 1 No All Wheel Drive ...
Страница 323: ...10 11 ELECTRICAL 10 TEST 2 No Display TEST 3 No Reverse Speed Limit ...
Страница 324: ...10 12 ELECTRICAL TEST 4 No AWD Hub Safety Limiter ...
Страница 325: ...10 13 ELECTRICAL 10 TEST 5 Reverse Speed Limiter TEST 6 Speed Sensor ...
Страница 326: ...10 14 ELECTRICAL TEST 7 No Fuel Gauge TEST 8 Transmission Switch ...
Страница 357: ...10 45 ELECTRICAL 10 BASIC WINCH WIRING PRE WIRED MODELS ...
Страница 367: ...10 55 ELECTRICAL 10 Cooling Fan EFI Fuel Pump EFI ...
Страница 368: ...10 56 ELECTRICAL Gear Switch EFI Power Circuit EFI ...
Страница 369: ...10 57 ELECTRICAL 10 Reverse Override EFI Fan Control EFI ...
Страница 370: ...10 58 ELECTRICAL Start Circuit EFI Start Enable EFI ...
Страница 373: ...11 3 800 TOURING EFI INTERNATIONAL 11 Exploded View Foot Brake Supply Hand Brake Supply ...
Страница 375: ...11 5 800 TOURING EFI INTERNATIONAL 11 800 TOURING EFI INTERNATIONAL ELECTRICAL Turn Hazard Signal Diagram ...
Страница 376: ...NOTES 800 TOURING EFI INTERNATIONAL 11 6 ...
Страница 382: ...IX 6 Intentional Blank Page ...
Страница 383: ...WD 1 WIRE DIAGRAM 2008 SPORTSMAN 800 EFI WIRE DIAGRAM ...
Страница 384: ...WD 2 WIRE DIAGRAM ...
Страница 385: ...WD 3 WIRE DIAGRAM 2008 SPORTSMAN 700 X2 800 TOURING EFI WIRE DIAGRAM ...
Страница 386: ...WD 4 WIRE DIAGRAM ...
Страница 387: ...WD 5 WIRE DIAGRAM 2008 SPORTSMAN 800 TOURING EFI INTERNATIONAL WIRE DIAGRAM ...
Страница 388: ...WD 6 WIRE DIAGRAM ...