What Is Hydraulic Tappet; Benefit Of Hydraulic Tappet; Cut Section View Of Rhvl - Royal Enfield Classic 500 2009 Service Manual

Hydraulic Tappets

WHAT IS HYDRAULIC TAPPET :

Hydraulic tappet (also called RHVL -
Roller Hydraulic Valve Lifter) is the ele-
ment connects between cam profile to
push rod and it operates with aid of the
hydraulic pressure to eliminate the clear-
ance and noise between valve train parts.

BENEFIT OF HYDRAULIC TAPPET :

1. Roller follower
hydraulic tappet avoid sliding
motion and friction, provides
improved tappet and cam life.
2. Control of
adjustment. The RHVL compensates
for changes in the length of valve
train components by wear or
variations in engine temperature.
PUSH ROD OIL
ESCAPING OIL
(D) PUSHROD
SEAT
(C)DISC VALVE
(B) OVER HEAD
OIL FLOW PATH
OIL HEAD, OIL DELIVERY CONTROL
VALVE, LOCKING ACTION
(A) HIGH PRESSURE CHAMBER OIL
(Roller Hydaulic Valve Lifter (RHVL)
on cam with
valve train lash
(E) LOW
PRESSURE
CHAMBER
OIL INLET
CHECK BALL
FLOW PATH
OUTER BODY
OIL TRANSFER ANULUS
PLUNGER
CHECK BALL
SEAT
AIR ESCAPE PATH THROUGH
PLUNGER CLEARANCE
(F) TRAPPED AIR VOLUME
(H) HIGH PRESURE CHAMBER
ROLLER
04-5
ROLLER
RHVL
CAM
CUT SECTION
VIEW OF RHVL