| US 7,484,672 B2 | ||
| Coatings for use in fuel injector components | ||
| Robert M. Campion, Normal, Ill. (US); Chuong Q. Dam, Peoria, Ill. (US); Kenneth W. Hall, East Peoria, Ill. (US); and William J. Rodier, Metamora, Ill. (US) | ||
| Assigned to Caterpillar Inc., Peoria, Ill. (US) | ||
| Filed on Jun. 10, 2004, as Appl. No. 10/864,404. | ||
| Application 10/864404 is a continuation of application No. 09/213710, filed on Dec. 17, 1998, granted, now 6,802,457. | ||
| Claims priority of provisional application 60/101382, filed on Sep. 21, 1998. | ||
| Prior Publication US 2004/0251312 A1, Dec. 16, 2004 | ||
| Int. Cl. F02M 47/02 (2006.01) | ||
| U.S. Cl. 239—88 [239/533.2] | 32 Claims |
| 1. A fuel injector including a plurality of components, the fuel injector comprising:
at least one of the plurality of fuel injector components including:
a steel substrate; and
a coating covering at least a portion of the steel substrate;
wherein the coating has a hardness of greater than 1500 Kg/mm2 as measured using a Hardness Knoop HDNS 50 gram load and a coefficient of friction of less than about 0.2, and the coating
includes a bond layer disposed over the steel substrate and a primary layer disposed over the bond layer.
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