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
161
162
163
164
165
166
167
168
169
170
171
172 
P 7MISSIONS I II TV
Page 12
If you've noticed an error in this article please click here to report it so we can fix it.
Cummins: SCR best for US
By Oliver Dixon ENGINE MANUFACTURER Cummins has performed a U-turn on its commitment to Exhaust Gas Recirculation (EGR) and will now feature Selective Catalytic Reduction (SCR) both on its medium and heavy-duty engine ranges.
Following Caterpillar's recent much-publicised exit from the on-highway market, the company is the only independent engine supplier to the North American industry. It had previously claimed that EGR alone was sufficient to comply with US EPA 10 emissions legislation, due to come into force on 1 January 2010.
However, according to Jim Kelly, president of Cummins' on-highway engine business, the decision to opt for SCR — taken as late as last week — is a result of increasing fuel prices and major developments in catalyst technology.
In the case of the latter, the use of copper zeolite will enable Cummins to offer a claimed 5% fuel saving over the outgoing EPA 07-compliant engine range.
But it seems obvious that key to this decision is the significant increase in the price of diesel being experienced by US truck operators.
Speaking to CM, Cummins vicepresident of sales and marketing Jeff Jones says that if an engine system can deliver even a 1-2% improvement in fuel economy, it would save a significant amount in diesel.
Cummins' decision now leaves International as the only manufacturer still planning to offer a solely EGR-derived engine for 2010 compliance.
The company's Maxxforce engine — a rebadged version of MAN'S D20/D26 range — is due to be assembled at Navistar's Alabama engine plant: MAN expects 5,000 units to have been shipped from Germany by the end of 2008.