Can Fuel Preparation Affect Engine-Out Hydrocarbon Emissions during an FTP (75CVS) Cycle Test? Powertrain Engineering, Ford Motor Company

Format:

Conference/Event

Author/Creator:

Ireton, James R., author.

Conference Name:

SAE 2001 World Congress (2001-03-05 : Detroit, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 2001

Summary:

The effect of fuel preparation on time-resolved, engine-out hydrocarbon (HC) emissions over a Federal Test Procedure cycle [FTP (75CVS)] for a ULEV vehicle equipped with a 6 cylinder engine has been investigated. Using a single-cone injector, the HC mole fraction in Bag 1 increased by a factor of 3-4 during each of the three accelerations in the first 100 sec after start. No such increases were observed in Bag 3 when the engine was fully warm. The increases during accelerations in Bag 1 were reduced by a factor of 3 when using a Dual-cone fuel injector as a drop-in substitute. The total, tailpipe FTP (75CVS) mass emissions were 25% smaller when using the Dual-cone injector. These results demonstrate that fuel preparation can affect HC emissions from a vehicle very significantly during cold start as has been deduced previously during cold-start tests using a dynamometer-controlled engine. In addition, the data suggest that steady-state tests using cold coolant and oil may not correctly represent true cold-start HC emissions

Notes:

Vendor supplied data

Publisher Number:

2001-01-1312

Access Restriction:

Restricted for use by site license