(19)
(11) EP 0 255 350 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
24.05.1989 Bulletin 1989/21

(43) Date of publication A2:
03.02.1988 Bulletin 1988/05

(21) Application number: 87306675.7

(22) Date of filing: 29.07.1987
(51) International Patent Classification (IPC)4: F02M 45/12, F02M 55/00
(84) Designated Contracting States:
DE FR GB IT

(30) Priority: 30.07.1986 US 891933

(71) Applicant: Ambac International Corporation
Columbia South Carolina 29203 (US)

(72) Inventor:
  • Kimberley,John Arthur
    East Granby, Connecticut 06026 (US)

(74) Representative: Newby, John Ross et al
J.Y. & G.W. Johnson Furnival House 14/18 High Holborn
London WC1V 6DE
London WC1V 6DE (GB)


(56) References cited: : 
   
       


    (54) High pressure fuel injection system


    (57) A high pressure fuel injection system which utilizes a pressure regulating or control valve (28) in a fuel return tube (26), provides a high residual pressure within a charge chamber (15) of a fuel injector (5) between injections. Maintaining a high residual fuel pressure between injections boosts the actual injection pressure over a wide range of engine speed and load conditions, independant of pump speed. Such injection pressures provide improved fuel atomization, with consequent reductions in particulate emissions and increased fuel efficiency.







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