Title:
ENGINE FUEL PRESSURE CONTROL DEVICE
Document Type and Number:
Japanese Patent JP2016156317
Kind Code:
A
Abstract:
PROBLEM TO BE SOLVED: To provide an engine fuel pressure control device capable of realizing smooth reduction in fuel pressure when an engine load is reduced while curbing excessive reduction in the fuel pressure.SOLUTION: An engine fuel pressure control device, when predicting future reduction in an engine load (S106: YES), starts anticipatory pressure reduction control to stop pressurization operation of a high pressure fuel pump (S107). Then, when actual fuel pressure PR becomes not more than a lower limit guard value PRGD and lower than target fuel pressure PRRQ (S102: YES) during execution of the anticipatory pressure reduction control (XDPMPSTP=ON), the engine fuel pressure control device performs a lower limit guard process to control a fuel injection amount through the high pressure fuel pump in a manner that maintains the actual fuel pressure PR at the lower limit guard value PRGD (S103).SELECTED DRAWING: Figure 3
Inventors:
MIZUNO HIROYUKI
SHINAGAWA TOMOHIRO
KOICHIGAWA TAKAHISA
SHINAGAWA TOMOHIRO
KOICHIGAWA TAKAHISA
Application Number:
JP2015034410A
Publication Date:
September 01, 2016
Filing Date:
February 24, 2015
Export Citation:
Assignee:
TOYOTA MOTOR CORP
International Classes:
F02D41/04; F02D45/00; F02M59/36
Domestic Patent References:
| JP2009209829A | 2009-09-17 | |||
| JP2014196731A | 2014-10-16 | |||
| JPH09158803A | 1997-06-17 | |||
| JP2010019088A | 2010-01-28 | |||
| JP2013060091A | 2013-04-04 |
Foreign References:
| WO2014175272A1 | 2014-10-30 | |||
| US20050193981A1 | 2005-09-08 |
Attorney, Agent or Firm:
Makoto Onda
Hironobu Onda
Hironobu Onda