Approval Details

Valid E.O.

Validity

This Executive Order approved the specified parts on on February 18, 1997.
As of Tuesday, February 4th, 2025 this Executive Order has not been overturned or superceeded.

Approved Parts

Models
1990 and older Detroit Diesel Corporation (DDC) heavy duty two stroke diesel engines for urban bus applications

This Executive Order may be listed as:
  • C.A.R.B.E.O. D-420
  • Executive Order 420 / D420
  • ARB # D-420
  • Executive Order No: D-420
  • C.A.R.B. No. D-420
  • Resolution D-420
For Free CARB Executive Order Status verification, email an image of the device Executive Order label as well as the Year/Make/Model and Test Group # of the vehicle to [email protected]

Download: Executive Order D-420 PDF

D-420 Document:

CARB_D-420

(Page 1 of 2) State of California AIR RESOURCES BOARD EXECUTIVE ORDER D—420 Relating to Exemptions Under Section 27156 of the Vehicle Code ENGINE CONTROL SYSTEMS LTD. "PURIMUFFLER" WHEREAS, Vehicle Code Sections 27156 and 38391, and Title 13, California Code of Regulations (hereafter "CCR") Section 2222, authorize the California Air Resources Board (ARB) and its Executive Officer to exempt add—on and modified aftermarket devices from the prohibitions of Vehicle Code Section 27156. WHEREAS, Engine Control Systems Ltd. of 165 Pony Drive, Newmarket, Ontario, Canada L3Y7V1, has applied to the ARB for exemption from the prohibitions in Vehicle Code Sections 27156 and 38391 for their "Purimuffler" system for installation on 1990 and older model—year Detroit Diesel Corporation (DDC) heavy—duty two—stroke diesel engines for urban bus applications. WHEREAS, pursuant to the authority vested in the Executive Officer by Health and Safety Code Section 39515 and in the Chief, Mobile Source Operations Division by Health and Safety Code Section 39516 and Executive Order G—45—9, the ARB finds that the above "Purimuffler" complies with the California Vehicle Code Section 27156 and Section 2222 of Title 13, California Code of Regulations. Exemption of the "Purimuffler", is based on testing conducted by the Southwest Research Institute, San Antonio, Texas, and Mobile Source Emissions Division of Environment Canada. IT IS HEREBY RESOLVED that the "Purimuffler" is exempt from the prohibitions in Vehicle Code Section 27156 for installation on 1990 and earlier model—year DDC heavy—duty two—stroke diesel engines for urban bus applications subject to the following conditions: 1. No changes are permitted to the "Purimuffler" as described in the original application for exemption. Any changes to the "Purimuffler", the installation instructions, or any of its components, and other factors addressed in this order must be evaluated and approved by the ARB prior to marketing in California. 2. Marketing of the "Purimuffler" using identification other than those shown in this Executive Order or the original submittal, or marketing of the "Purimuffler" for application other than the one listed in this Executive Order shall be prohibited unless prior approval is obtained from the ARB. Exemption of this product shall not be construed as an exemption to sell, offer for sale, or advertise any components of the "Purimuffler" as individual devices. 3. Any oral or written references to this Executive Order or its content by Engine Control Systems Ltd., its principals, agents, employees, distributors, dealers, or other representatives must include the disclaimer that the Executive Order or the exemption it provides is not an endorsement or approval of any emissions reduction claims for the "Purimuffler" and is only a finding that the "Purimuffler" is exempt from the prohibitions of Vehicle Code Section 27156. 4. Upon installation, the Purimuffler carries a warranty for 100,000 miles provided that it is installed in accordance with the installation instructions provided by Engine Control Systems Ltd.

ENGINE CONTROL SYSTEMS LTD. EXECUTIVE ORDER D—420 "PURIMUFFLER" (Page 2 of 2) THIS EXECUTIVE ORDER DOES NOT CONSTITUTE A CERTIFICATION, ACCREDITATION, APPROVAL, OR ANY OTHER TYPE OR ENDORSEMENT BY THE AIR RESOURCES BOARD OF ANY CLAIMS OF THE APPLICANT CONCERNING ANTI—POLLUTION BENEFITS OR ANY ALLEGED BENEFITS OF THE "PURIMUFFLER". Violation of any of the above conditions shall be grounds for revocation of this order. The order may be revoked only after ten day written notice of intention to revoke it, during which period the holder of the order may request in writing a hearing to contest the proposed revocation. If a hearing is requested, it shall be held within ten days of receipt of the request, and the order may not be revoked until a determination is made, after the hearing, that grounds for revocation exist. Executed at El Monte, California, this Z é Mobife Source Operations Division


TABLE 5. HDTC Data for 1987 Cummins LT—A 10B; 179 kW @ 2100 rpm Converter Muffler 1.83m from turbocharger outlet . Emissions . soC »_'HC' | ~CO ~|. NOx CO2 PM VOF —~| > Non $Q4. . (g/kW—hr) WWkos We T ' > VOF . ~mp/<= kW—he . Engine—Out Cold Start 0.829 4.913 7428 T719 0.637 0.118 0.519 2.8 Hot Start 0.453 4.457 7.983 764 0.525 0.144 0.381 2.9 Composite 0.507 4.523° 7.903 767 0.542 0.142 0.400 2.9 With Converter Muffler Cold Start 0.023 3.206 7111 806 0.532 0.059 0.473 4.0 Hot Start 0.012 3.204 7.1759 769 0.422 0.049 0.373 7.2 Composite 0.013 3.205 7.666 775 0.438 0.050 0.388 6.8 Composite Percent Reductions 97.3% 29.1% 3.0% ~1.0% 19.2% 64.8% 3.0% —234% TABLE 6. HDTC Data for 1991 DDC 6V92TA DDEC II; 207 kW @ 2100 rpm Converter Muffler 1.83m from turbocharger outlet ‘Emissions HC CO > NOx CO2 PM VOF Non SQ4: (g/kW—br) VOF mg/ kW—hr Engine—Out Cold Start 0.495 1.791 6.550 964 0.244 0.081 —0.163 na Hot Start 0.578 1.568 6.644 922 0.227 0.079 0.148 Composite 0.567 1.600 6.631 928 0.229 0.079 0.150 With Converter Muffler Cold Start 0.150 0.808 6.453 972 0.192 0.038 0.154 na Hot Start 0.192 0.472 6.546 921 0.168 0.035 0.133 Composite 0.186 0.520 6.532 929 0.170 0.036 0.134 Composite . Percent Reductions 67.1% 67.5% 1.5% —0.1% 25.7% 54.4% 10.7% na na = not available

TABLE 7. NY Composite Chassis Dynamometer Data for 1989 MCI Classic urban bus with 6V92TA DDEC HI; 189 kW @ 2100 ;Vehicle #8930 ‘Emissions L VCHC 0_ ‘CO l ~ ~NOx®=)~ ~CO2¢% J PM ®& |= SOF «* ‘Ansol~ @| > "Fuel 28— (onl) 18500 km after installation Baseline 1.91 3.47 11.46 1795 1.41 na na 1.49 _With Catalyst 1.31 2.30 . 12.04 1755 1.00 1.49 *Reductions 31.4% 33.7% —5.1% 2.2% 29.1% 0.0% TABLE 8. NY Composite Chassis Dynamometer Data for 1984 GMC Classic urban bus with 1987 6V7IN; 135 kW 2000 rpm;Vehicle #8423 Emissions HC CO > NOx CO2 PM SOF Insol. Fuel (g/km) Use (kom/L) 3500 km after installation Baseline 3.00 22.72 16.54 1734 1.53 na na 1.51 With Catalyst 0.91 4.23 15.87 1666 0.96 1.61 % Reductions 69.6% $1.4% 4.1% 3.9% 37.3% 6.6%

A—3 TABLE 9. CBD Chassis Dynamometer Average Data for 1992 International School Buses with Navistar DT466; Vehicles # 1000 and #1001 Emissions | \]~ ~HC —~—CO NOx CO2 ~PM ‘SOF Insol. Fuel — (g/km) | : Use Oct./Dec. 1994 Fresh Catalyst | Baseline 1.45 2.00 7.85 1126 0.347 0.120 0.227 2.33 With Converter 0.07 0.06 8.28 1116 0.257 0.094 0.163 2.35 % Reductions 95.2% 97.0% —5.4% —0.9% 25.9% 21.6% 28.2% 0.9% March, 1995 After ca. 8000 km _ Baseline 1.62 2.18 7.85 1594 0403 0.219 0.184 2.35 With Catalyst 0.15 0.09 8.23 1591 0.249 0.080 0.169 2.32 % Reductions 90.7% 95.9% —4.8% 0.2% 38.2% 63.4% 10.9% —1.2% August, 1995 After ca. 17500 km Baseline 1.16 2.19 8.25 1120 0.550 0.203 0.347 2.39 With Catalyst 0.18* 0.16 9.43 1152 0.348 0.043 0.305 2.34 % Reductions 84.5% 92.7% —~14.3% —2.8% 36.7% 78.8% 12.1% —2.1% TABLE 10. New York Bus Cycle Chassis Dynamometer Average Data for 1992 International School Buses with Navistar DT466; Vehicles #1000 and #1001 Emissions HC CO NOx CO2 PM SOF Insol. Fuel (g/km) Use (km/L) Oct./Dec., 1994 Fresh Catalyst — Baseline 1.50 3.98 18.84 2011 0.732 0.285 0.447 1.31 With Converter 0.22 1.02 17.60 2012 0.581 0.194 0.387 1.32 % Reductions 85.3% 74.4% 6.6% 0.0% 20.6% 31.9% 13.4% 0.8% March, 1995 After ca. 8000 km Baseline 3.02 4.76 18.31 2039 0.962 0.538 0.424 1.28 With Catalyst 0.85 1.65 18.35 2032 0.553 0.130 0.423 1.30 % Reductions 71.9% 65.3% —0.2% 0.3% 42.5% 75.8% 0.2% 1.6% August, 1995 After ca. 17500 km Baseline 2.74 4.81 19.10 2022 1.203 0.328 0.875 1.32 With Catalyst 0.84 2.39 20.46 ~ 2053 0.985 0.256 0.729 1.31 % Reductions 69.3% 50.3% —1.1% —1.5% 18.1% 22.0% 16.7% —0.8% 63

A—4 TABLE 11. New York Composite Cycle Chassis Dynamometer Average Data for 1992 International School Buses with Navistar DT466; Vehicles #1000 and #1001 — . [ Emissions ~— HC cCO ‘| ~ NOx ‘CO2 PM _ SOF Insol. Fuel:— (g/km) - (—(Use— | (Km/L) Oct./Dec., 1994 Fresh Catalyst Baseline 0.97 1.88 8.35 1053 0.369 0.121 0.248 2.50 With Converter 0.19 0.44 8.66 1053 0.317 0.078 0.239 2.51 % Reductions 80.4% 76.6% —3.17% 0.0% 14.1% 35.5% 0.5% 0.4% March, 1995 After ca. 8000 km Baseline 1.69 2.20 8.30 1052 0.506 0.215 0.291 2.49 With Catalyst 0.24 0.63 8.73 1045 0.322 0.068 0.254 2.53 % Reductions 85.8% 71.4% —5.2% 0.7% 36.4% 68.4% 12.7% 1.6% August, 1995 After ca. 17500 km Baseline 1.33 2.27 9.00 1050 0.109 0.285 0.424 2.54 With Catalyst 0.27 0.75 10.01 1044 0.463 0.069 0.394 2.57 % Reductions 79.17% 67.0% —11.2% 0.6% 34.7% 75.8% > 7.1% 1.2% _—__ TABLE 12. New York Composite Cycle Chassis Dynamometer Average Data for Various Heavy Duty Trucks Emissions HC CO NOx CO2 PM SOF Insol. Fuel (g/km) Use (kEm/L) 1992 Mack MS250P Vehicles # 46121 and #26005 May 1995; Fresh Catalyst Baseline 0.53 2.43 11.15 921 0.391 0.284 0.107 2.53 With Converter Muffler 0.16 0.92 11.60 910 0.228 0.111 0.117 2.59 % Reductions 69.8% 62.1% 4.0% 1.2% 41.7% 60.9% —9.3% 2.4% August 1995: after ca. 12000 km Baseline 0.39 2.46 11.43 878 0.435 0.158 0.277 3.05 With Converter Muffler 0.11 1.22 12.21 895 0.235 0.059 0.176 3.00 % Reductions 71.8% 50.4% ~6.8% ~1.9% 46.0% 62.6% 36.5% —1.6% 1994 International Series 4900 Nov.1995: After 100hr thermal aging . Baseline 0.45 2.91 8.62 792 0.39 na na na With Converter Muffler 0.39 1.19 8.70 755 0.24 ___ éReductions 13.3% 59.1% —0.9% 4.6% 38.5% na = not available at time of printing

1.4 i Oct/Dec 94 1.2 :|OMar—95 1 T 0.8 4 x 8 nE. 0.6 4 0.4 7 0.2 4 0 — + t — Baseline Baseline Baseline Converter Converter Converter CBD NY NY Comp CBD NY NY Comp Test Cycle / Vehicle Test Date Figure 1 : Average PM Emissions over Various Chassis Test Cycles [_— 3.5 i 3 1_— 25 i N Oct/Dec 94 l g 2 i O Mar—95 | | 3 p3 @Aug—95 o 15 |2 Ht | A i 1 4 6 | P l 0.5 4 i ; 0 — — + ; Baseline Baseline Baseline Converter Converter Converter t CBD NY NY Comp CBD NY NY Comp i Test Cycle / Vehicle Test Date i Figure 2: Average HC Emissions over Various Chassis Test Cycles 65

CO (g/km) Baseline Baseline Baseline Converter Converter Converter CBD NY NY Comp CBD NY NY Comp Test Cycle / Vehicle Test Date Figure 3: Average CO Emissions over Various Chassis Test Cycles 25 20 B Oct/Dec 94 OMar—95 9 Aug—95 NOx (g/km) Baseline Baseline Baseline Converter Converter Converter CBD NY NY Comp CBD NY NY Comp Test Cycle / Vehicle Test Date Figure 4: Average NOx Emissions over Various Chassis Test Cycles 66

A—6 6 M@CO Baseline 5 + sCO Catalyst 4 + 2 6 38 — NNN 0 w 0 1 2 3 4 5 6 7 8 9101112131415161718 19 21 22 23 24 25 26 Vehicle Tests Figure 7: CO Emissions over all Chassis Test Cycles 25 NOx baseline 20 —8— NOx catalyst n NOx (g/km) & aa 1 s (J Loz Liz j k j T R v M Y 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 Vehicle Tests Figure 8: NOx Emissions over all Chassis Test Cycles 69

14 + @ PM Baseline PM (g/km) BPM Catalyst | Co O & o 1 1 2 3 4 5 6 7 8 9 10 11 120 13 14 15 16 17 Vehicle Tests Figure 5: PM Emissions over all Chassis Test Cycles _m~ _ / HC Baseline | EHC Catalyst HC (g/km) Vehicle Tests Figure 6: HC Emissions over all Chassis Test Cycles 68


Document Created: 2005-09-01 12:44:59
Document Modified: 2005-09-01 12:44:59

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