Title:
Fuel supply control device
Document Type and Number:
Japanese Patent JP6252327
Kind Code:
B2
Abstract:
PROBLEM TO BE SOLVED: To suppress a deficiency in an amount of fuel supplied to an engine, and to suppress output instability of the engine or generation of an engine stall, in a fuel supply system equipped with pressure accumulating piping.SOLUTION: An engine fuel supply system 50 includes a fuel pump 20, a common rail 13 and an injector 32. An ECU 40 executes a fuel injection instruction by an injector 32 in plural times while gradually decreasing a common rail pressure when a prescribed learning execution condition is met. It is determined whether or not fuel is injected from the injector 32 in accordance with the instruction on the basis of a variation amount of an engine rotation speed just after fuel injection by the injector 32 is instructed. When it is determined that the fuel is not injected from the injector 32 in execution of the fuel injection instruction in plural times, a minimum injection pressure, which is a lower limit value of the common rail pressure allowing fuel injection from the injector 32, is learned based on the common rail pressure at the determined injection time.
Inventors:
Takehiro Masahiro
Application Number:
JP2014081746A
Publication Date:
December 27, 2017
Filing Date:
April 11, 2014
Export Citation:
Assignee:
株式会社デンソー
International Classes:
F02D41/06; F02D41/04; F02D41/14; F02D41/20; F02D45/00; F02M37/00; F02M69/16
Domestic Patent References:
| JP2001041082A | ||||
| JP9222037A | ||||
| JP2007239488A | ||||
| JP2013164044A | ||||
| JP2009150297A |
Attorney, Agent or Firm:
Tsuyoshi Yamada
Kyoko Hino
Hiroshi Matsuda
Kyoko Hino
Hiroshi Matsuda