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Просмотр инструкции снегоходы Ski Doo SUMMIT 2005, страница 253
Section 06 ENGINE MANAGEMENT (SDI)
Subsection 01 (OVERVIEW)
EMS — ENGINE MANAGEMENT SYSTEM FUNCTIONS
A32A3US
ENGINE
CONTROL
MODULE
(ECM)
Throttle position sensor (TPS)
Knock sensor (KS)
Exhaust gas temperature sensor (EGTS)
Crankshaft position sensor (CPS)
Beeper
Ignition coil
RAVE solenoid
Fuel injector (4)
Fuel pump
Speedometer
Communication port
INPUTS OUTPUTS
SDI SYSTEM
Air temperature sensor (ATS)
Air pressure sensor (APS)
Coolant temperature sensor (CTS)
Battery voltage
Digitally encoded security system (DESS)
START/RER switch
Oil tank low-level
Communication port
Starter solenoid
Limp home mode
This engine management system controls the fuel
injection, the ignition timing and the electronically
controlled RAVE.
As shown in the SDI CONTROL SYSTEM illustra-
tion, the ECM is the central point of the engine
management system. It reads the inputs, makes
computations, uses pre-determined parameters
and sends the proper signals to the outputs for
proper engine management.
The ECM also stores the fault codes and general
information such as: operating conditions, vehicle
hours, serial numbers, customer and maintenance
information.
ELECTRONIC FUEL INJECTION
The ECM receives the signals from different sen-
sors which indicate engine operating conditions at
milli-second intervals.
Signals from sensors are used by the ECM to de-
termine the injection parameters (fuel maps) re-
quired for optimum air-fuel ratio.
The CPS and TPS are the primary sensors used
to control the injection and ignition timing. Other
sensors are used for secondary input.
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