Heater for a cold start fuel injector

For use in conjunction with a fuel passageway in an internal combustion engine in which fuel is injected into the passageway, a heater comprising:

• a tubular housing insertable into the passageway, said housing having an inner surface open to the passageway and an outer surface,
• a plurality of heater assemblies, each heating assembly having a capsule and at least one electrical heating element,
• means for securing said capsules to said outer surface of said housing so that said capsules are circumferentially spaced from each other and so that at least one surface of each heating element in each capsule is thermally connected with said outer surface of said housing.

For use in connection with a fuel passageway in an internal combustion engine in which fuel is injected into the passageway, a heater comprising:

• a tubular housing insertable into the passageway,
• a plurality of heating assemblies, each heating assembly having a capsule and at least one electrical heating element thermally coupled to its associated capsule,
• said capsules being secured to said housing so that said capsules are circumferentially spaced from each other and so that at least one surface of each capsule is open to said passageway.

For use in conjunction with a fuel passageway in an internal combustion engine in which fuel is injected into the passageway, a heater comprising:

• a tubular housing insertable into the passageway, said housing having an inner surface open to the passageway and an outer surface,
• a plurality of heater assemblies, each heating assembly having a capsule and at least one electrical heating element,
• said capsules being secured to said outer surface of said housing so that said capsules are circumferentially spaced from each other and so that at least one surface of each heating element in each capsule is thermally connected with said outer surface of said housing.