Control device of engine

Patent metadata

Field	Value
Publication number	US-9429089-B2
Application number	US-201113809738-A
Country	US
Kind code	B2
Filing date	Jul 13, 2011
Priority date	Jul 14, 2010
Publication date	Aug 30, 2016
Grant date	Aug 30, 2016

Abstract

A control device of an engine includes means for detecting an efficiency of the engine, means for detecting a combustion stability of the engine, means for detecting an HC discharged quantity, and means for executing a notification. The notification is executed when the efficiency of the engine and the combustion stability of the engine do not fall in a predetermined region A 1 . The predetermined region A 1 is a range of the efficiency of the engine and the combustion stability of the engine. The HC discharged quantity at the time of engine start is a predetermined value or less.

First claim

The invention claimed is:

1. A control device of an engine comprising:
means for detecting efficiency of the engine;
means for detecting combustion stability of the engine;
means for detecting a HC discharged quantity at the time of engine start based on efficiency of the engine and combustion stability of the engine; and
means for executing a notification when the efficiency of the engine and the combustion stability of the engine do not fall in a predetermined region A 1 , wherein
the predetermined region A 1 is a range of the efficiency of the engine and the combustion stability of the engine wherein the engine, and
the HC discharged quantity at the time of engine start is a predetermined value or less.

2. The control device of an engine according to claim 1 , wherein
the efficiency of the engine is obtained based on a ratio of an engine speed and an intake air quantity of the engine at the time of idling operation.

3. The control device of an engine according to claim 1 , wherein
the combustion stability of the engine is obtained based on a variation degree of angular acceleration of the engine.

4. The control device of an engine according to claim 1 , further comprising:
means for controlling the engine so that the efficiency of the engine and the combustion stability of the engine fall in a predetermined region A 2 .

5. The control device of an engine according to claim 4 , further comprising:
means for controlling at least an air fuel ratio or ignition timing of the engine so that the efficiency of the engine and the combustion stability of the engine fall in the predetermined region A 2 .

6. The control device of an engine according to claim 4 , wherein
the control of the engine is stopped when the combustion stability of the engine becomes a predetermined value or more.

7. The control device of an engine according to claim 5 , wherein
when the combustion stability of the engine becomes a predetermined value or more,
the air fuel ratio of the engine is controlled to a rich side, or
the ignition timing of the engine is controlled to an advance side.

8. The control device of an engine according to claim 4 , wherein
notification is executed when the combustion stability of the engine becomes a predetermined value or more.

9. The control device of an engine according to claim 1 , further comprising:
means for changing the predetermined region A 1 based on an operation state of the engine or a diagnosis result of a means related to exhaust performance.

10. The control device of an engine according to claim 4 , further comprising:
means for changing the predetermined region A 2 based on an operation state of the engine or a diagnosis result of a means related to exhaust performance.

11. A control device of an engine, comprising:
an engine efficiency detector that detects efficiency of the engine;
a combustion stability detector that detects combustion stability of the engine;
a HC discharge quantity detector that detects the HC discharged quantity at the time of engine start based on the efficiency of the engine and the combustion stability of the engine; and
a notifier that executes a notification when the efficiency of the engine and the combustion stability of the engine do not fall in a predetermined region A 1 , wherein
the predetermined region A 1 is a range of the efficiency of the engine and the combustion stability of the engine, and
the HC discharged quantity at the time of engine start is a predetermined value or less.

12. The control device of an engine according to claim 11 , further comprising:
a controller that controls the engine so that the efficiency of the engine and the combustion stability of the engine fall in a predetermined region A 2 .

13. The control device of an engine according to claim 12 , further comprising:
at least an air fuel ratio controller or an ignition timing controller that control the air fuel ratio or the ignition timing of the engine so that the efficiency of the engine and the combustion stability of the engine fall in the predetermined region A 2 .

14. The control device of an engine according to claim 11 , further comprising:
a predetermined region changer that changes the predetermined region A 1 based on an operational state of the engine or a diagnosis result related to exhaust performance.

15. The control device of an engine according to claim 12 , further comprising:
a predetermined region changer that changes the predetermined region A 2 based on an operational state of the engine or a diagnosis result related to exhaust performance.

Assignees

• Nakagawa Shinji
• Numata Akihito
• Fukuchi Eisaku
• Hitachi Automotive Systems Ltd

Inventors

• Nakagawa Shinji
• Numata Akihito
• Fukuchi Eisaku

Classifications

• G01M15/05

  by combined monitoring of two or more different engine parameters · CPC title

• F02D2200/1012

  Engine speed gradient · CPC title

• F02D41/1498

  measuring engine roughness · CPC title

• F02D41/068

  for warming-up · CPC title

• F02D2200/101

  Engine speed · CPC title