l
Because of this after burn, high temperature is
cre ate d i n th i s syste m an d t h i s h i g h
temperature causes pre-ignition in the
combustion chamber. Because of this pre-
ignition, knocking effect is created and thus
the efficiency of the engine is decreased.
Fresh air cut off at the closed throttle condition,
will help to avoid the after burn.
FUNCTION
l
Clean air from the air cleaner assembly is
passed through the inlet port (A). The outlet (B)
which has a reed valve connected to exhaust
manifold. Another line from intake manifold is
connected to chamber (C). The port (D) has a
small orifice than the other ports. The fresh and
filtered air passes from port (A) to port (B)
through this orifice. When there is a suction in
chamber (C) the d i a p h r a g m i s p u l l e d u p ,
closing the valve at port (D). The airflow from
port (A) to (B) is stopped. Depending upon the
amount of vacuum created in the intake
manifold, the amount of airflow from p o r t ( A )
to (B) is controlled. (Fig. 4.35)
REMOVAL
l
Dislocate the hose clip (A) from hose air inlet
and disconnect the hose from secondary air
injection valve. (Fig. 4.36)
l
Similarly, dislocate the hose clip (B) from hose
air outlet and disconnect the hose from
secondary air injection valve. (Fig. 4.36)
Nose plier
l
Remove hexagonal bolt (M6x30 - 2 nos.) from
secondary air injection valve mounting and
take out the valve along with punched washers
(2 nos.) . (Fig. 4.37)
10 mm spanner
Tightening torque
7.5 ± 1 Nm
Note:
While reassembling ensure the availability
of cushions and spacers at the mounting
location of the valve.
STOPPER
REED
SUPPORT
FROM AIRFILTER
C
D
A
B
INTAKEMANIFOLD
DIAPHRAGM
SPRING
VALVE
MANIFOLD
EXHAUST
MANIFOLD
Fig. 4.35
Fig. 4.36
4-16
TVS APACHE RTR 200
SERVICE MANUAL
FUEL, LUBRICATION AND
EXHAUST SYSTEM
A
B
Fig. 4.37
