Exhaust Gas Emission Regulation; The Emission Standard In Usa - Yanmar 3TNV Series Service Manual

1. General

1.6 Exhaust gas emission regulation

The engines in this manual have been certified by the US EPA, California ARB and/or the 97/68/EC
Directive.
California
Proposition 65 Warning
Diesel engine exhaust and some of its constitutions are known to the State of California to cause
cancer, birth defects, and other reproductive harm.
California
Proposition 65 Warning
Battery posts，terminals，and related accessories contain lead and lead compounds，chemicals
known to the State of California to cause cancer and reproductive harm．

1.6.1 The Emission Standard in USA

(1) EPA Nonroad Diesel Engine Emission Standards
Engine Power Tier
Tier 1
kW < 8
(hp < 11)
Tier 2
Tier 1
8 <= kW < 19
(11 <= hp < 25)
Tier 2
Tier 1
19<= kW < 37
(25 <= hp < 50)
Tier 2
Tier 1
37 <= kW < 75
Tier 2
(50 <= hp < 100)
Tier 3
Tier 1
75 <= kW < 130
Tier 2
(100 <= hp < 175)
Tier 3
Note1) The EPA emission regulation under 130kW is mentioned below.
Note2) As for Model year, the year which a regulation is applicable to is shown.
Engine classification
Constant speed engine
Variable speed engine
(2) California ARB Emission Regulation
The ARB emission standard is based on that of the EPA.
Model Year NOx
2000 -
2005 -
2000 -
2005 -
1999 -
2004 -
1998 9.2 (6.9)
2004 -
2008 -
1997 9.2 (6.9)
2003 -
2007 -
Transient smoke standards % opacity
(acceleration/lug/peak modes)
Not regulated
20/15/50 or less
18
HC NMHC + NOx
- 10.5 (7.8) 8.0 (6.0)
- 7.5 (5.6) 8.0 (6.0)
- 9.5 (7.1) 6.6 (4.9)
- 7.5 (5.6) 6.6 (4.9)
- 9.5 (7.1) 5.5 (4.1)
- 7.5 (5.6) 5.5 (4.1)
- -
- 7.5 (5.6) 5.0 (3.7)
- 4.7 (3.5) 5.0 (3.7)
- -
- 6.6 (4.9) 5.0 (3.7)
- 4.0 (3.0) 5.0 (3.7)
g/kW·hr(g/bhp·hr)
CO PM
1.0 (0.75)
0.80 (0.60)
0.80 (0.60)
0.80 (0.60)
0.80 (0.60)
0.60 (0.45)
- -
0.40 (0.30)
- -
0.30 (0.22)