CAMSHAFT CONSTRUCTION [L8, LF, L3]
id0110a1101300
• The cast iron 5 axis-hole, which has great rigidity, has been adopted for the camshaft to insure higher reliability.
• The endplay of the camshaft is regulated at the rear of the No. 1 journal.
• The lubricating oil is supplied through the oil supply hole at each journal. Additionally the cam nose part is chill casted to improve the abrasion resistance and the width of cam hill part is shortened to reduce the weight.
• There shall be no positioning pin or key slot for the camshaft sprocket at the edge of the camshaft. The lubrication process has been adopted for the camshaft sprocket tightening bolt to prevent instability in the axis during tightening.
• There is an oil line, by which the oil is supplied to the variable valve timing actuator, located at the LF engine models and L3 engine models intake port side camshaft (front of camshaft).
Camshaft Specification.
|
ITEM
|
L8
|
LF
|
L3
|
|
IN
|
EX
|
IN
|
EX
|
IN
|
EX
|
|
LIFT
|
(mm {in})
|
7.5 {0.29}
|
7.7 {0.30}
|
9.1 {0.35}
|
7.7 {0.30}
|
9.1 {0.35}
|
7.8 {0.31}
|
|
Overlap
|
(°)
|
8
|
0-30
|
0-30
|
|
1
|
TDC
|
|
2
|
Variable domain
|
|
3
|
EX
|
|
4
|
IN
|
|
5
|
BDC
|
• The detection unit or the camshaft position (CMP) sensor, which is integrated with the camshaft, is at the intake port side camshaft for L8 engine models.
• The detection unit (trigger plate) for the camshaft position (CMP) sensor is at the intake port side camshaft for LF engine models and L3 engine models (with variable valve timing mechanism).
• The groove for securing the No.1 cylinder TDC for the camshaft, is provided at the rear of the intake and exhaust camshaft.
|
1
|
Intake camshaft
|
|
2
|
Exhaust camshaft
|
|
3
|
Thrust
|
|
4
|
Cam nose
|
|
5
|
Cam journal
|
|
6
|
Cam heel
|
|
7
|
Detection part for CKP sensors
|
|
8
|
SST
|