Engine

Patent metadata

Field	Value
Publication number	US-9644567-B2
Application number	US-201314655532-A
Country	US
Kind code	B2
Filing date	Sep 10, 2013
Priority date	Dec 25, 2012
Publication date	May 9, 2017
Grant date	May 9, 2017

Abstract

An engine includes a control means that calculates a standard injection time based on the target number of revolutions of the engine and a standard injection amount being a fuel injection amount of the engine and corrects the standard injection time based on at least a correction amount, and a fuel injection control unit calculates a coolant correction amount based on the target number of revolutions, the standard injection amount, and a coolant temperature of the engine, and when the coolant temperature is less than a first predetermined temperature, the fuel injection control unit corrects the standard injection time only based on the coolant correction amount.

First claim

The invention claimed is:

1. An engine configured to include a control means that calculates a standard injection time, a standard injection pressure, a standard injection interval or a standard injection amount based on a target number of revolutions and a fuel injection amount of the engine and corrects the standard injection time, the standard injection pressure, the standard injection interval or the standard injection amount based on at least a correction amount, wherein
the control means is configured to calculate a coolant correction amount based on the target number of revolutions, the fuel injection amount and a coolant temperature of the engine,
the control means is configured to calculate a standard atmospheric pressure correction amount based on the target number of revolutions and the fuel injection amount, the control means is configured to calculate an atmospheric pressure correction amount based on the standard atmospheric pressure correction amount and an atmospheric pressure correction coefficient,
the control means is configured to correct the standard injection time, the standard injection pressure, the standard injection interval, or the standard injection amount only based on the coolant correction amount, when the coolant temperature is less than a first predetermined temperature,
the control means is configured to correct the standard injection time, the standard injection pressure, the standard injection interval, or the standard injection amount based on the coolant correction amount and the atmospheric pressure correction, when the coolant temperature is equal to or higher than the first predetermined temperature and is less than a second predetermined temperature, and
the control means is configured to correct the standard injection time, the standard injection pressure, the standard injection interval, or the standard injection amount based on the atmospheric pressure correction, when the coolant temperature is equal to or higher than the second predetermined temperature.

2. The engine according to claim 1 , wherein the control means is configured to set the first predetermined temperature and the second predetermined temperature depending on an outside temperature.

Assignees

• Yanmar Co Ltd

Inventors

• Iwase Atsuhito
• Otani Tomohiro
• Oku Yasuaki
• Fujimoto Yuki
• Fukuda Tomohiro

Classifications

• F02D2200/0618

  Actual fuel injection timing or delay, e.g. determined from fuel pressure drop · CPC title

• F02D41/068

  for warming-up · CPC title

• F02D2041/0067

  Determining the EGR temperature · CPC title

• F02D41/401 Primary

  Controlling injection timing (F02D41/402 takes precedence) · CPC title

• Y02T10/47

  Cross-Sectional Technologies · mapped topic