214
Chapter 4
R3 - Lower shaft
R4 - Left shaft
R5 - Right shaft
-R6- Shifting fork
R7 - Housing
4 2 3
R3rd
= RIR2R3R6R7
First Gear Reliability
Model
The same reliability
model as 2nd gear for 3% of the time in Fig. 4.21.
For lowest speed, first gear, D is placed as shown in Fig. 4.19 and F slid
into contact with J
Rlst=
R2nd
Reverse Reliability
Model
The same reliability
model as 1 st and 2nd gear except adding 5-6 bearings
(use 6), 3 gear pairs, and 4 total shafts. The shaft P Fig. 4.19 and the
car are reversed by moving F to the right until it meshes with L, the gear
ratio being A to G and K to L to F. Note: K gear is in front of gear L.
The reliability
Fig. 4.22 is shown and the numbers represent
R~ - Six bearing and seals
R2 - Three gear pairs
R3 - Four shafts
R4 - Shifting fork
R5 - Housing
The reliability
for one percent of the time is in reverse as follows
Rreverse
6 3 4
= R! R2R3R4R5
in--out
Figure 4.21. Second gear series reliability model for Fig. 4.19.
in
~
out
Figure 4.22. Reverse gear series reliability model for Fig. 4.19.