초록 ▼

An elongated hollow body is provided defining a first central passage extending longitudinally therethrough and first inner, second intermediate and third outer elongated annular chambers disposed about the passage, first chamber and second chamber, respectively. The body includes wall portions cons

An elongated hollow body is provided defining a first central passage extending longitudinally therethrough and first inner, second intermediate and third outer elongated annular chambers disposed about the passage, first chamber and second chamber, respectively. The body includes wall portions constructed of good heat transfer materials separating adjacent chambers and the first chamber from the passage. The passage includes opposite liquid fuel inlet and outlet ends and a plurality of small diameter passages communicate longitudinally spaced portions of the central passage with the first chamber. The second chamber includes manifold vacuum air inlet and outlet structure opening thereinto and the third chamber includes liquid engine coolant inlet and outlet structure opening thereinto. In addition, a pair of opposite side bar magnets extend along the wall portions of the body separating the first and second chambers. Heat is applied to the heater by engine coolant flowing through the third chamber, the heating capacity of the third chamber is modulated by manifold vacuum air passing through the second chamber and the first chamber surrounding the central fuel passage serves as an expansion chamber for fuel vapors and to further modulate the heating of the fuel passing through the central fuel passage by the engine coolant.

대표청구항 ▼

In an internal combustion engine including a fuel supply line, liquid coolant flow passages, and a manifold vacuum source, wherein the improvement comprises: a fuel heater for use in heating liquid fuel, said heater including an elongated hollow body defining a first central passage extending theret

In an internal combustion engine including a fuel supply line, liquid coolant flow passages, and a manifold vacuum source, wherein the improvement comprises: a fuel heater for use in heating liquid fuel, said heater including an elongated hollow body defining a first central passage extending therethrough and first inner, second intermediate and third outer chambers disposed about said passage, first chamber and second chamber, respectively, with heater body wall portions of good heat transfer materials separating adjacent chambers and said first chamber from said passage, said passage including opposite liquid fuel inlet and outlet ends, a plurality of small diameter passages communicating longitudinally spaced portions of said passage with said first chamber, said second chamber including manifold vacuum air inlet and outlet means opening thereinto and said third chamber including liquid engine coolant inlet and outlet means opening thereinto.