1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160 
in the article on engine developments
Page 107
If you've noticed an error in this article please click here to report it so we can fix it.
in the Show Number of Commercial dolor (September 22), mention is made of he Detroit Diesel 8V-71 T turbocharged ,ngine. The concept of using a turbocharger
o scavenge the combustion chambers of a wo-stroke is new to me; in fact it would :eon to he impracticable. Could you !xplain the principle?
A Turbocharging Detroit Diesel twoH. stroke engines is employed in conunction with normal scavenging by means f a positive-displacement blower. The air iroduced by the turbocharger is additional a that provided by the blower. The upply of air could be increased by using • larger blower but in this ease some f the extra power produced will be bsorbed in driving the unit. Air under ressure derived from turbocharging is Iatained with increasing mechanical losses. It is noteworthy that the blower of irger Detroit Diesel engines designed for all use applications is equipped with a iscorinect clutch which disengages the !lower at higher outputs, all the air eing then provided by the turbocharger. 'he use of a positive-displacement blower essential for operating at low outputs.
Of related interest, Detroit Diesel engines itted to Hot Rod sprint vehicles are filially blown at lower speeds by means f a compressed air bottle.
The control of combustion by applying blower /turbocharger system to a twotroke enables exhaust emissions to be educed, according to Detroit Diesel. )evelopment work promises to be increasngly favourable to control emissions.