Title:
LARGE BORE FUEL SYSTEM AND FUEL INJECTOR FOR SAME
Document Type and Number:
WIPO Patent Application WO/2012/016102
Kind Code:
A3
Abstract:
A low leakage large bore fuel system (10) includes a common rail (16) fluidly connected to at least one of a source of heavy fuel oil (12) and a source of distillate diesel fuel (14). A plurality of fuel injectors (30) are fluidly connected to the common rail (16) and each include a cooling inlet (35) and a cooling outlet (36). Each fuel injector (30) also includes an electrical actuator (40) coupled to a direct operated nozzle check valve by a pilot valve member (41) and a control valve member (45). Fuel leakage is reduced between injection events by equalizing pressures in a pilot control chamber (63) and an intermediate control chamber (62) that are separated by a guide surface of the control valve member (45). Also, between injection events the pilot valve member (41) blocks a drain outlet (37) from a common rail inlet (33) of the fuel injector (30).
Inventors:
HANSON CHRISTOPHER D (US)
LEWIS STEPHEN (US)
MOHAMMED QURSHEED HUSSAIN (US)
LEWIS STEPHEN (US)
MOHAMMED QURSHEED HUSSAIN (US)
Application Number:
PCT/US2011/045817
Publication Date:
April 19, 2012
Filing Date:
July 29, 2011
Export Citation:
Assignee:
CATERPILLAR INC (US)
HANSON CHRISTOPHER D (US)
LEWIS STEPHEN (US)
MOHAMMED QURSHEED HUSSAIN (US)
HANSON CHRISTOPHER D (US)
LEWIS STEPHEN (US)
MOHAMMED QURSHEED HUSSAIN (US)
International Classes:
F02M41/00; F02D19/06; F02M53/04; F02M55/02; F02M61/16
Foreign References:
| US20100084489A1 | 2010-04-08 | |||
| EP2071177A1 | 2009-06-17 | |||
| US20080017169A1 | 2008-01-24 | |||
| US20010020467A1 | 2001-09-13 |
Attorney, Agent or Firm:
MYERS, Carl, E. et al. (Peoria, IL, US)
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