Title:
INTERNAL-COMBUSTION-ENGINE FUEL-INJECTION CONTROL DEVICE AND FUEL-INJECTION CONTROL METHOD
Document Type and Number:
WIPO Patent Application WO/2015/053101
Kind Code:
A1
Abstract:
An internal-combustion-engine fuel-injection control device capable of reducing PM and oil dilution when cooling an internal combustion engine while favorably maintaining the air-fuel mixture. A fuel-injection control device for injecting a fuel mixture comprising alcohol and gasoline, wherein: the period of fuel injection from the fuel-injection valve is appropriately adjusted according to the alcohol concentration in the fuel mixture and the vertical movement of the piston in the internal combustion engine; and the oil dilution and PM generation are reduced when cooling the internal combustion engine while favorably maintaining the air-fuel mixture. The fuel-injection period during the intake step of the internal combustion engine is separated into a plurality of periods (T1, T2), and the initial injection period (T1) and final injection period (T2) are changed according to the alcohol concentration of the fuel mixture. When the alcohol concentration is low, the initial injection period (T1) is shortened and the final injection period (T2) is lengthened, as the alcohol concentration increases, the initial injection period (T1) is lengthened and the final injection period (T2) is shortened, and the fuel injection amount to the crestal plane of the piston and to the cylinder-bore lateral surface is adjusted.
Inventors:
SUKEGAWA YOSHIHIRO (JP)
OKAMOTO TAKASHI (JP)
OKAMOTO TAKASHI (JP)
Application Number:
PCT/JP2014/075775
Publication Date:
April 16, 2015
Filing Date:
September 29, 2014
Export Citation:
Assignee:
HITACHI AUTOMOTIVE SYSTEMS LTD (JP)
International Classes:
F02D41/34; F02D19/08; F02D41/02; F02D41/04; F02D41/06; F02D45/00; F02M45/00; F02M61/06; F02M61/08; F02M61/10
Foreign References:
| JP2009047055A | 2009-03-05 | |||
| JP2008267274A | 2008-11-06 | |||
| JP2008255907A | 2008-10-23 | |||
| JP2008261231A | 2008-10-30 | |||
| JP2011247110A | 2011-12-08 | |||
| JP2001214744A | 2001-08-10 | |||
| JP2013194658A | 2013-09-30 |
Attorney, Agent or Firm:
INOUE Manabu et al. (JP)
Manabu Inoue (JP)
Manabu Inoue (JP)
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