Honda Prelude 1993 Service Manual page 44

VTEC
Outline
T h e e n g i n e i s e q u i p p e d w i t h m u | t . p | e c a m I o b e s p e r c y | i n d e r , p r o v i d i n g o n e v a | v e t i m i n g a n d v a | v e I i f t p r o ' i | e a t I o w s p e €
and a different proiile at hagh speed. switch-over from one profile to the
other is controlled electronically' and is selecied
by monitoring current engine speed and load.
i
lr
r'l
il
CAMSHAFT
CAM LOBES FOR LOW RPM
CAM LOBES FOR HIGH RPM
PRIMARY BOCKER ARM
MID ROCKER ARM
SECONDARY ROCKER ARM
HYDRAULIC PISTON (A}
HYORAULIC PISTOI{ {AI
STOPPER PISTON
LOST MOTION ASSEMBLY
EXHAUST VALVE
INTAKE VALVE
5-4