Chapter 15 EMISSIONS TEST PROCEDURE FOR A VEHICLE EQUIPPED WITH A PERIODICALLY REGENERATING SYSTEM

Transcription

1 Chapter 15 EISSIONS TEST PROCEDURE FOR A VEHICLE EQUIPPED WITH A PERIODICALLY REGENERATING SYSTE 1. INTRODUCTION This chapter efines the specific provions regaring type-approval of a vehicle equippe with a perioically regenerating system as efine in paragraph DEFINITIONS "Perioically regenerating system" means an anti-pollution evice (e.g. catalytic converter, particulate trap) that requires a perioical regeneration process in less than 4,000 km of normal vehicle operation. During cycles where regeneration occurs, emison stanars can be exceee. If a regeneration of an anti-pollution evice occurs at least once per Type I test an that has alreay regenerate at least once uring vehicle preparation cycle, it will be conere as a continuously regenerating system which oes not require a special test proceure. This chapter oes not apply to continuously regenerating systems. At the request of the manufacturer, the test proceure specific to perioically regenerating systems will not apply to a regenerative evice if the manufacturer provies ata to the type approval authority that, uring cycles where regeneration occurs, emisons remain below the stanars given in applicable Gazette Notification applie for the concerne vehicle category after agreement of the test agency. 2. SCOPE AND EXTENSION OF THE TYPE APPROVAL 2.1. Vehicle family groups equippe with perioically regenerating system The proceure applies to vehicles equippe with a perioically regenerating system as efine in paragraph For the purpose of this annex vehicle family groups may be establishe. Accoringly, those vehicle types with regenerative systems, whose parameters escribe below are ientical, or within the state tolerances, shall be conere to belong to the same family with respect to measurements specific to the efine perioically regenerating systems Ientical parameters are: Engine: orth / CVR / TAP-115/116 (Issue 4) Page 1033

2 (a) Combustion process. Perioically regenerating system (i.e. catalyst, particulate trap): (a) (b) (c) () (e) Construction (i.e. type of enclosure, type of precious metal, type of substrate, cell enty), Type an working principle, Dosage an aitive system, Volume ±10 per cent, Location (temperature ±50 C at 90 km/h or 5 per cent ifference of max. temperature / pressure) Vehicle types of ifferent reference masses The K i factors evelope by the proceures in this chapter for type approval of a vehicle type with a perioically regenerating system as efine in paragraph 1.1.1, may be extene to other vehicles in the family group with a reference mass within the next two higher equivalent inertia classes or any lower equivalent inertia. 3. TEST PROCEDURE The vehicle may be equippe with a switch capable of preventing or permitting the regeneration process provie that this operation has no effect on original engine calibration. This switch shall be permitte only for the purpose of preventing regeneration uring loaing of the regeneration system an uring the pre-conitioning cycles. However, it shall not be use uring the measurement of emisons uring the regeneration phase; rather the emison test shall be carrie out with the unchange Original Equipment anufacturer's (OE) control unit Exhaust emison measurement between two cycles where regenerative phases occur Average emisons between regeneration phases an uring loaing of the regenerative evice shall be etermine from the arithmetic mean of several approximately equiistant (if more than 2) Type I operating cycles or equivalent engine test bench cycles. As an alternative the manufacturer may provie ata to show that the emisons remain constant (+/-15 per cent) between regeneration phases. In this case, the emisons measure uring the regular Type I test may be use. In any other case emisons measurement for at least two Type I operating cycles or equivalent engine test bench cycles must be complete: one immeiately after regeneration (before new loaing) an one as close as posble prior to a regeneration phase. All emisons orth / CVR / TAP-115/116 (Issue 4) Page 1034

3 measurements an calculations shall be carrie out accoring to Chapter 3 paragraph 5, 6, 7 an The loaing process an K i etermination shall be mae uring the Type I operating cycle, on a chass ynamometer or on an engine test bench ung an equivalent test cycle. These cycles may be run continuously (i.e. without the nee to switch the engine off between cycles). After any number of complete cycles, the vehicle may be remove from the chass ynamometer, an the test continue at a later time The number of cycles (D) between two cycles where regeneration phases occur, the number of cycles over which emisons measurements are mae (n), an each emisons measurement ( j ) shall be reporte in Chapter 2, items 7.1 to 7.4 or to as applicable easurement of emisons uring regeneration Preparation of the vehicle, if require, for the emisons test uring a regeneration phase, may be complete ung the preparation cycles in paragraph 5.3. of chapter 3 or equivalent engine test bench cycles, epening on the loaing proceure chosen in paragraph above The test an vehicle conitions for the Type I test escribe in chapter 3 apply before the first vali emison test is carrie out Regeneration must not occur uring the preparation of the vehicle. This may be ensure by one of the following methos: A "ummy" regenerating system or partial system may be fitte for the preconitioning cycles Any other metho agree between the manufacturer an the test agency A col-start exhaust emison test incluing a regeneration process shall be performe accoring to the Type I operating cycle, or equivalent engine test bench cycle. If the emisons tests between two cycles where regeneration phases occur are carrie out on an engine test bench, the emisons test incluing a regeneration phase shall also be carrie out on an engine test bench If the regeneration process requires more than one operating cycle, subsequent test cycle(s) shall be riven immeiately, without switching the engine off, until complete regeneration has been achieve (each cycle shall be complete). The time necessary to set up a new test shoul be as short as posble (e.g. particular matter filter change). The engine must be switche off uring this perio. orth / CVR / TAP-115/116 (Issue 4) Page 1035

4 The emison values uring regeneration ( ri ) shall be calculate accoring to chapter 8. The number of operating cycles () measure for complete regeneration shall be recore Calculation of the combine exhaust emisons n j= = 1 n ' j n 2; ri j= = 1 ' rij = * D + D + ri * where for each pollutant (i) conere: j = mass emisons of pollutant (i) in g/km over one Type I operating cycle (or equivalent engine test bench cycle) without regeneration rij = mass emisons of pollutant (i) in g/km over one Type I operating cycle (or equivalent engine test bench cycle) uring regeneration. (when n > 1, the first Type I test is run col, an subsequent cycles are hot) = mean mass emison of pollutant (i) in g/km without regeneration ri = mean mass emison of pollutant (i) in g/km uring regeneration = n = = D = mean mass emison of pollutant (i) in g/km number of test points at which emisons measurements (Type I operating cycles or equivalent engine test bench cycles) are mae between two cycles where regenerative phases occur, 2 number of operating cycles require for regeneration number of operating cycles between two cycles where regenerative phases occur For exemplary illustration of measurement parameters see Figure 8/1. orth / CVR / TAP-115/116 (Issue 4) Page 1036

5 Emison [g/km] = [( D) + ( ri ) ] ( + ) D ri K = i, j D Number of cycles Figure 8/1: Parameters measure uring emisons test uring an between cycles where regeneration occurs (schematic example, the emisons uring D may increase or ecrease) 3.4. Calculation of the regeneration factor K for each pollutant (i) conere K i = /, an K i results shall be recore in the test report elivere by the Testing Agency. K i may be etermine following the completion of a ngle sequence. orth / CVR / TAP-115/116 (Issue 4) Page 1037