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' E�iIBIT A <br /> ORTECH <br /> � ' ' . . 1 <br /> , � Emission Control System Evaluation <br /> _ For: City of Decatur <br /> � 1. INTRODUCTION . <br /> ORTECH International is responding to a Request ior Proposal from the City of <br /> � _ . Decatur tor the evaluation of an emission control system on a heavy duty 2- <br /> stroke diesel engine for bus application. This system is based on the fumigation . <br /> � of ethanol into the engine intake air ilow and will also utilize a ca.talytic <br /> converter. <br /> Evatuations will be based on the EPA Transient Cycle utilizing a Detroit Diesel <br /> 6V-71 NA engine. <br /> 2. TECHNICAL APPROACH <br /> Emissions tests witl be performed using the ORTECH EPA Transient Test <br /> Facility. This facitity utitizes a Generat Electric DC 60� HP absorbing/500 HP <br /> motoring dynamometer in conjunction with a Digalog Cellmate II computer <br /> control system. This equipment allows ORTECH to run the tull EPA Heavy- <br /> Duty Truck Cycle meeting EPA regression tolerances. Emission sampling and <br /> > analysis is aocomplished using a 10"stainless steef double-dilution tunneVPDP <br /> � system, gaseous bench and pariiculate bench built by Beckman. <br /> ; The transient test ce11 is fu�ly capable oi conducting EPA transient emission <br /> . testing. ORTECH is in the process ot obtaining ofiicial epproval from EPA.The <br /> iransient emission procedure used will tollow the Code oi Federal Regulations <br /> (CFR40. Part 86, Sub-part N)with the iollowing additions: <br /> ♦ unburned ethanol will be cotlected in en aqueous sotution and analyzed by � <br /> � gas chromatograph (exGudinB baseline); <br /> • eldehydes/ketones will be measured using the DNPH cartridge method <br /> , with subsequent enalysis by HPLC. � <br /> ORTECH does not currently have the capabilities to pe�iorm the Federal Smoke <br /> . cycle. However, it is penerally known that engines with emission levels below <br /> transient standards will pass the Federal Smoke Standard. <br /> The test fuel used will be as close as possible to the tuel normally used by tne <br /> � Oecatur Transit Aulhority(i.e.e 50/50 blend ot D-1 and D-2 diesel tuel). It has : <br /> . been assumed that the ethanol used in the injection system will be provided by <br /> � Midwest Power Concepts. <br />