Exhaust Valve Seat Leakage Ford Motor Company

Format:

Conference/Event

Author/Creator:

Hoard, John, author.

Conference Name:

International Spring Fuels & Lubricants Meeting & Exposition (1997-05-05 : Dearborn, Michigan, United States)

Language:

English

Physical Description:

1 online resource

Place of Publication:

Warrendale, PA SAE International 1997

Summary:

A 1.9L four cylinder engine was evaluated for leakage of cylinder charge through the exhaust valve seats. Fast FID HC analyzer traces reveal leakage. Static leakdown tests do not correlate with the Fast FID measurement, unlike previously published reports for a different engine. The causes of exhaust valve seat leakage are likely to beBecause deposit related effects are very history dependent, it is very difficult to obtain quantitative results.Some experimental observations:A brief survey of several other engines indicated the presence of leaks. It is likely that most engines exhibit exhaust valve seat leakage at least at some times.It is difficult to assess the effect of these leaks on exhaust hydrocarbon emissions because of the complexity of the engine history dependence. Limited data suggest a 5% contribution is possible

Notes:

Vendor supplied data

Publisher Number:

971638

Access Restriction:

Restricted for use by site license