ISSN: 1546-962X
Published Online: 27 February 2007
Page Count: 13

Component Durability and High Mileage Performance of a Full Carboxylate Coolant in Heavy Duty Diesel (HDD) Engines

Fritz, Paul O.
Senior Staff Chemist, Chevron Corporation, New Windsor,NY

Bartley, Leonard S.
Senior Staff Chemist, Chevron Corporation, New Windsor,NY

Pellet, Regis
Senior Staff Chemist, Chevron Corporation, New Windsor,NY

Moser, Virginia
Marketing Specialists, Chevron Corporation, Houston,TX

Ulabarro, Carmen
Marketing Specialists, Chevron Corporation, Houston,TX

(Received 21 April 2006; accepted 18 January 2007)

Abstract

Performance of a full carboxylate coolant has been demonstrated in engine bench cavitation testing, fleet testing, and post fleet testing coolant corrosion tests. Performance in the proposed ASTM “Heavy Duty Cavitation Test” was established and found to satisfactorily exceed performance limits. Fleet testing of a full carboxylate coolant technology in Class 8 trucks, using Caterpillar C-12 engines demonstrated minimal inhibitor depletion to 400 000 miles under controlled zero coolant top-off conditions with no refortification. In a second fleet, vehicles accumulated high mileages under real world conditions. In this test, Caterpillar 3406E engines were torn down and inspected demonstrating extended corrosion protection and superior component durability to beyond 700 000 miles, without the addition of supplemental coolant additives or extenders. Coolants from these vehicles were removed and tested in the laboratory to verify their extended life properties.

Keywords:
extended life coolant, field test, fleet testing, organic additive technology, carboxylate, inhibitor

Paper ID: JAI100616
DOI: 10.1520/JAI100616
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