2-5
TECH
FEA
Technical features and description
Electronic fuel injection control system
F150B uses electronic fuel injection control system to control the fuel injection timing and the
amount of injected fuel. The fuel injection amount (example: duration of fuel injector energization) is
controlled to assure the appropriate air/fuel ratio based on the intake air flow rate calculated from
intake pressure and engine speed, responding to every engine operating condition represented by
the signals from each sensor. High output power, improved fuel economy, and low exhaust emis-
sions are attained by this system. Two types of fuel injection are carried out. One is synchronous
injection in which the fuel injection always occurs at certain crankshaft angle, after the required com-
pensation is made in accordance with the signals from each sensor. The other is asynchronous
injection in which the fuel is injected regardless of crankshaft angle, once the demand for the fuel
injection is detected in the signals from each sensor.
Block diagram
TPS
Pulser coil
Neutral switch
Air pressure
sensor
Air temperature
sensor
Engine temperature
sensor
Main battery
Thermoswitch
Engine shut-off switch
Emergency stop
ON/OFF
Battery voltage
Engine temperature
Intake air temperature
Intake air pressure
Neutral position
Throttle valve opening
Crankshaft angle,
Engine speed
Engine
ECM
Fuel injector drive
signal
High-pressure fuel
pump drive signal
Fuel injector #1–#4
High-pressure
fuel pump
Fuel supply
Summary of Contents for F150B
Page 1: ...SERVICE MANUAL 6BM 28197 5L 11 F150B FL150B ...
Page 4: ......
Page 211: ...6 34 Vapor separator 0 1 2 3 4 5 6 7 8 9 10 A MEMO ...
Page 311: ...8 32 Shimming regular rotation model 0 1 2 3 4 5 6 7 8 9 10 A Shim location F R P T3 T1 T2 ...
Page 351: ...8 72 Shimming counter rotation model 0 1 2 3 4 5 6 7 8 9 10 A Shim location F R P T3 T2 T4 T1 ...
Page 448: ...A 1 MEMO ...
Page 451: ......
Page 452: ...Printed in China Jul 2008 0 6 1 ABE E_4 YAMAHA MOTOR CO LTD ...
Page 458: ......