This invention provides a carbon commutator for a fuel pump and a carbon brush, having excellent sliding properties and abrasion resistance, and a fuel pump with these carbon commutator and carbon brush incorporated therein. In the carbon commutator, at least a contact part which comes into contact with the brush contains amorphous carbon. The carbon commutator is characterized in that the content of the amorphous carbon is not less than 0.2% by weight and less than 5% by weight. The carbon brush for a fuel pump comprises an amorphous carbon and slides upon contact with a carbon commutator. The carbon brush is characterized in that the content of the amorphous carbon is not less than 0.2% by weight and not more than 5% by weight. The fuel pump is characterized by comprising the carbon commutator having the above constitution and the carbon brush having the above constitution.;COPYRIGHT KIPO & WIPO 2010
展开▼
