Control device of internal combustion engine

• US 7,287,501 B2
• Filed: 11/28/2005
• Issued: 10/30/2007
• Est. Priority Date: 12/08/2004
• Status: Active Grant

• Current Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Original Assignee: Toyota Jidosha Kabushiki Kaisha (Toyota Motor Corporation)
• Inventors: Yamada, Kazumi
• Primary Examiner(s): Cronin; Stephen K.
• Assistant Examiner(s): Leung; Ka Chun
• Application Number:
  US11/287,313
• Publication Number:
  US 20060118075A1
• Time in Patent Office: 701 Days
• Field of Search: 123/179.4, 123/198.DB, 123/198.D, 123/198.DC, 123/632, 701/112
• US Class Current: 123/179.4
• CPC Class Codes: F02D 41/042 for stopping the engine

Abstract

A coil driving a contact of an ignition and injection relay is connected to a connection line of a main relay and an ECU. When an ignition switch is turned off, the ECU drives an ignition device and an injection device for a prescribed period thereafter. Then, the ECU turns off a main relay to perform self-shutting-off, and the ignition and injection relay is turned off interlocked with an operation of the main relay being turned off.

Claims

1. A control device of an internal combustion engine, comprising:

a control portion performing stop control for operating the internal combustion engine for a prescribed period after an ignition switch is turned off;

a first relay that is a main relay supplying and cutting off power to said control portion, and wherein the first relay is turned off by said control portion after performance of said stop control by said control portion; and

a second relay receiving an output of said first relay and interlocked with an operation of said first relay being turned off to cut off feeding to at least one of an ignition device and an injection device of said internal combustion engine.

2. The control device of an internal combustion engine according to claim 1, wherein

a drive wire for driving said second relay is connected to a feeding line from said first relay to said control portion.

3. The control device of an internal combustion engine according to claim 1, further comprising

a third relay supplying and cutting off power to an electric pump supplying fuel to said internal combustion engine.

4. The control device of an internal combustion engine according to claim 3, wherein

said third relay is interlocked with an operation of said ignition switch being turned off to cut off feeding to said electric pump.

5. The control device of an internal combustion engine according to claim 1, wherein

said prescribed period is defined with a prescribed time, regardless of a number of ignition performance of said ignition device.