Patent ID: 7591253
Filing Date: 2009-09-22
Classification: F02D,F02M,Y02T

Abstract:
1. An engine system comprising: a secondary fuel source for providing a secondary fuel; a metering valve for delivering the secondary fuel at a substantially pre-determined rate, the metering valve comprising: an air intake in fluid communication with the fuel outlet of the metering valve to receive the secondary fuel from the metering valve so as to permit the secondary fuel to mix with air; and an internal combustion engine adapted to operate on a primary fuel other than the secondary fuel, and having an intake manifold adapted to receive primary fuel from a primary fuel source, the intake manifold in fluid communication with the air intake to receive a mixture of air and secondary fuel from the air intake, the internal combustion engine having a cooling system, wherein the valve body further has at least one fluid port and at least one fluid passage in fluid communication with the at least one fluid port, neither of which is in fluid communication with the fuel inlet, fuel outlet, or fuel passage of the valve body, and wherein the at least one fluid port is in fluid communication with the cooling system of the primary engine system to permit a heat-transfer fluid to circulate through the at least one fluid passage to substantially regulate the temperature of the valve body.