ENGINE
A. FLOW OF LUBRICATING OIL
(1) Piston
(2) Idle Gear
(3) Oil Pump
(4) Relief Va l v e
(5) Strainer
(6) Oil Filter Element
(7) Bypass Va l v e
(8) Oil Pan
(9) Rocker Arm Shaft
(10) Rocker Arm
( 11) Push Rod
(12) Ta p p e t
(13) Oil Pressure Switch
(14) Camshaft
(15) Crankshaft
The lubricating oil is forced to each journal through the oil passages of the cylinder block, cylinder head and
shafts. The oil, splashed by the crankshaft or thrown off from the bearings, lubricates other engine parts such
as the push rods (11), tappets (12), piston pins (15) and timing gears.
B. OIL PUMP
The oil pump is a gear pump. Whose rotors have
trochoid lobes. The inner rotor (3) has 4 lobes and
the outer rotor (4) has 5 lobes, and they are
eccentrically engaged with each other. The inner
r o t o r, which is driven by the crankshaft through the
gears, rotates the outer rotor in the same direction,
varying the space between the lobes.
While the rotors rotate from(A) to (B), the space
leading to the inlet port increases, which causes the
oil to flow through the inlet port.
When the rotors rotate to(C), the port to which the
space leads is changed from inlet to outlet.
At (D), the space decreases and sucked oil is
discahrged from the outlet port.
(1) Inlet (3) Inner Rotor
(2) Inlet Port (4) Outer Rotor
2.2 LUBRICATING SYSTEM
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