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A fuel heater for heating fuel flowing in the fuel system of an internal combustion engine has an annular heating chamber in which is mounted a heating element formed from a material having a non-linear positive temperature coefficient of resistance. The element defines an upwardly extending flow pa

A fuel heater for heating fuel flowing in the fuel system of an internal combustion engine has an annular heating chamber in which is mounted a heating element formed from a material having a non-linear positive temperature coefficient of resistance. The element defines an upwardly extending flow passage and the heater includes a cup-shaped support member having a central aperture and an annular baffle plate 25 which forms the upper wall of the chamber. Cold fuel is led through gaps at the outer edge of the baffle plate and flows along the base wall of the chamber and then upwardly through the flow passage of the element. The heated fuel flows from the chamber through a space defined between an upwardly extending lid of the support member and a depending tubular element of the baffle plate.

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An electrically powered fuel heater for heating fuel flowing in a fuel system of an internal combustion engine, comprising a support member of cup-shaped form, a central aperture defined in the base wall of the support member, an upstanding lip defined about said aperture, said support member and li

An electrically powered fuel heater for heating fuel flowing in a fuel system of an internal combustion engine, comprising a support member of cup-shaped form, a central aperture defined in the base wall of the support member, an upstanding lip defined about said aperture, said support member and lip defining an annular fuel heating chamber, an annular baffle plate extending over said chamber, flow apertures communicating with the exterior of said chamber whereby fuel flowing into said chamber will be directed adjacent the base wall of the support member, an electric heating element located in the chamber, said heating element defining a flow passage or flow passages therethrough which extend upwardly substantially at right angles to the base wall of the support member, said heating element being spaced from said base wall and from the baffle plate, and the baffle plate at its inner periphery being secured or being formed with a depending tubular element extending inwardly of and spaced from said upstanding lip, the fuel being heated as it rises through said flow passage or passages and flowing from said chamber through the space defined between said tubular element and said lip.