Engine System Control Device

Patent metadata

Field	Value
Publication number	US-2020240340-A1
Application number	US-201615761418-A
Country	US
Kind code	A1
Filing date	Aug 8, 2016
Priority date	Sep 25, 2015
Publication date	Jul 30, 2020
Grant date	—

Abstract

An object of the present invention is to provide an engine system control device capable of stabilizing a combustion state, while improving fuel economy by performing intake air heating. According to the present invention, there is provided an engine system control device which controls an engine system including an engine configured to combust air-fuel mixture, an intake air path configured to take air to the engine, and an intake air heating mechanism configured to heat the intake air, wherein a heating amount of the intake air is controlled depending on a combustion speed of the air-fuel mixture.

First claim

1 . An engine system control device which controls an engine system including an engine configured to combust air-fuel mixture, an intake air path configured to take air to the engine, and an intake air heating mechanism configured to heat the intake air,
wherein a heating amount of the intake air is controlled depending on a combustion speed of the air-fuel mixture.

2 . The engine system control device according to claim 1 , wherein the intake air heating mechanism heats the intake air by exhaust heat generated by combustion.

3 . The engine system control device according to claim 2 , wherein the intake air heating mechanism has a heat exchanger configured to exchange heat between the intake air and the exhaust air,
the heat exchanger is configured to exchange heat between intake air flowing through an intake air diverging path diverged from the intake air path and exhaust air flowing through an exhaust air diverging path diverged from an exhaust air path exhausted from the engine, an intake air diverging path side flow rate control valve is provided in the intake air diverging path, an exhaust air diverging path side flow rate control valve is provided in the exhaust air diverging path, and opening degrees of the intake air diverging path side flow rate control valve and the exhaust air diverging path side flow rate control valve are controlled depending on the combustion speed.

4 . The engine system control device according to claim 3 , wherein the intake air after the heat exchange is returned to an intake air manifold provided upstream of the engine.

5 . The engine system control device according to claim 4 , wherein an intake air manifold temperature sensor configured to measure an intake air temperature in the intake air manifold is provided to control the opening degree of the flow rate control valve on the basis of the intake air temperature.

6 . The engine system control device according to claim 5 , wherein, at the time of startup of the engine, a control is performed in which the opening degree of the intake air diverging path side flow rate control valve is fully closed, and the opening degree of the exhaust air diverging path side flow rate control valve is fully opened.

7 . The engine system control device according to claim 4 , wherein a post-heat exchange intake air temperature sensor configured to measure the intake air temperature after the heat exchange is provided, and
the exhaust air diverging path side flow rate control valve is controlled on the basis of the intake air temperature after the heat exchange.

8 . The engine system control device according to claim 7 , wherein an intake air main path side flow rate control valve is provided in a main path between a diverging point of the intake air pipe and the engine, and
the heating amount of the intake air is controlled, using the intake air main path side flow rate control valve and the intake air diverging path side flow rate control valve.

9 . The engine system control device according to claim 7 , wherein an exhaust air main path side flow rate control valve is provided in a main path downstream from the diverging point of the exhaust air path, and
a control is performed so that the intake air temperature after the heat exchange becomes a target temperature, using the exhaust air main path side flow rate control valve and the exhaust air diverging path side flow rate control valve.

10 . The engine system control device according to claim 9 , wherein, at the time of start-up of the engine, the opening degree of the intake air main path side flow rate control valve is fully opened, the opening degree of the intake air diverging path side flow rate control valve is fully closed, the opening degree of the exhaust air main flow path side flow rate control valve is fully closed, and the opening degree of the exhaust air diverging path side flow rate control valve is fully opened.

11 . The engine system control device according to claim 3 , wherein the heating amount of the intake air is controlled depending on an opening degree of throttle provided in the intake air path.

Assignees

• Hitachi Automotive Systems Ltd

Inventors

• Orita Hisayuki
• Saruwatari Masayuki
• ORYOJI Kazuhiro
• Abe Motoyuki

Classifications

• F02M31/08 Primary

  the gases being exhaust gases {(adding exhaust gases to the air intake passage F02M26/00)} · CPC title

• F02M31/066

  operated manually, e.g. by means of valves on the air filter · CPC title

• F02M31/087

  Heat-exchange arrangements between the air intake and exhaust gas passages, e.g. by means of contact between the passages · CPC title

• F02D41/062 Primary

  for starting (F02D41/061 takes precedence) · CPC title

• F02D41/04 Primary

  Introducing corrections for particular operating conditions (F02D41/14 takes precedence) · CPC title