(19)
(11) EP 0 441 738 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
18.12.1991 Bulletin 1991/51

(43) Date of publication A2:
14.08.1991 Bulletin 1991/33

(21) Application number: 91630010.6

(22) Date of filing: 07.02.1991
(51) International Patent Classification (IPC)5: F02M 63/00, F02M 61/20, F02M 47/00
(84) Designated Contracting States:
DE ES FR GB IT LU NL SE

(30) Priority: 07.02.1990 US 478199

(71) Applicant: AIL CORPORATION
Columbia South Carolina 29203 (US)

(72) Inventors:
  • Kimberley, John A.
    East Granby, Connecticut 06026 (US)
  • Cavanaugh, John B.
    West Springfield, Massachusetts 01089 (US)

(74) Representative: Weydert, Robert et al
Dennemeyer & Associates Sàrl P.O. Box 1502
L-1015 Luxembourg
L-1015 Luxembourg (LU)


(56) References cited: : 
   
       


    (54) High pressure fuel injection system


    (57) The high pressure fuel injection system utilizes a pressure regulating or control valve (28) in an injector leak-off fuel conduit (26) to provide a high residual pressure within the injector (5) between injections. Maintaining a high residual fuel pressure boosts the injection pressure to provide improved fuel atomization, with consequent reductions in particulate emissions and increased fuel efficiency. The pressure regulating valve (28) may be controlled in accordance with engine operating conditions to provide a variable injection pressure boost commensurate with engine requirements.






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