Catalyzer; Idle Speed Control (Isc) - Suzuki gsr750 Technical Information

(2) Catalyzer

Features
.
The muffler contains a catalyzer to reduce exhaust emissions and enhance environmental
performance.
.
The catalyzer is designed to reduce more hydrocarbons (HC), the carbon monoxide (CO) and nitrogen
oxides (NOx) emissions.
Item
Diameter
Length
Number of cells
benefit
.
The number of cells in the catalyzer is increased to enlarge the surface area for increased contact
between the exhaust gas contents and the catalyzer. This raises the catalytic conversion efficiency
and improves the emissions cleaning performance.

(3) Idle Speed Control (ISC)

Features
.
ISC constantly maintains stable idling operation, greatly enhancing user comfort. The Engine Control
module senses and calculates the difference between actual idling rpm and normal idling rpm; an ISC
valve located in the throttle body bypass circuit is opened/closed by a stepping motor to regulate the
amount of intake airflow and thus compensate to reach the normal idling rpm.
.
When starting in cold climates, the system also conducts fast-idle control by increasing the volume of
intake airflow based on engine coolant temperature information from the sensor.
benefit
.
The ISC system improves starting, reduces cold-start emissions and stabilizes engine idle under
varying conditions.
GSR750
69.5 mm
120 mm
300
69.5
120
27
GSR600
76.3 mm
80 mm
200