Three-Way Catalytic Converter System - Yamaha YZF-R1P Service Manual

THREE-WAY CATALYTIC CONVERTER SYSTEM

System outline
This is a highly efficient exhaust gas cleaning system that effects air-fuel control through a joint
effort by the FI system and the three-way catalytic converter system. By effecting comprehensive
control of the air-fuel ratio in this manner, this system reduces the CO, HC, and NOx in the exhaust
gases.
The FI system controls the mixture to an optimal air-fuel ratio (basic air-fuel ratio) that matches the
operating condition of the engine in order to realize an ideal combustion.
Through the joint effort of these control systems, the exhaust gas is cleaned in a highly efficient
manner without sacrificing engine performance.
Three-way catalytic converter system diagram
1 Ignition coil
2 Injector
3 Intake temperature
sensor
4 Throttle position sensor
5 Intake air pressure
sensor
6 Crankshaft position
sensor
7 Coolant temperature
sensor
1 - 19
FEATURES
8 Cylinder identification
sensor
9 Spark plug
0 ECU
A Igniter
GEN
INFO
B Atmospheric pressure
sensor
C Catalytic converter