Patent ID: 6176081
Filing Date: 2001-01-23
Classification: F01N,Y02T

Abstract:
A heating device for an exhaust gas purification catalytic converter comprising:an annular metal housing;an electric heater mounted within said metal housing; andpower relay means fixedly mounted on said metal housing so as to relay electric power to said electric heater, said power relay means comprising:a tubular electrode receiving member extending into an inside of said metal housing from an outside thereof through a peripheral wall thereof;an electrode rod being received in said electrode receiving member and projecting from said receiving member toward said electric heater;an insulating retaining member retaining said electrode rod in spaced relation to an inner surface of said electrode receiving member; andan electrically-conductive connecting member electrically connecting a projected end of said electrode rod to one end of said heater,wherein a first insulating coating is provided on at least one of the inner surface of said electrode receiving member and a portion of said electrode rod facing the inner surface of said electrode receiving member; andwherein a second insulating coating is provided at least on a portion of a surface of said connecting member which is disposed adjacent to the projected end of said electrode rod, and faces one of said electrode receiving member and said metal housing.