ENGINE STOP CONTROL APPARATUS

• US 20100036591A1
• Filed: 08/06/2009
• Published: 02/11/2010
• Est. Priority Date: 08/08/2008
• Status: Abandoned Application

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: NAKAI, Yasuhiro
• Application Number:
  US12/536,799
• Publication Number:
  US 20100036591A1
• Time in Patent Office: Days
• US Class Current: 701/112
• CPC Class Codes: F02D 2041/0095 Synchronisation of the cylinders during engine shutdown
• CPC Class Codes: F02D 41/042 for stopping the engine
• CPC Class Codes: F02N 11/0818 Conditions for starting or stopping the engine or for deactivating the idle-start-stop mode
• CPC Class Codes: F02N 19/005 Aiding engine start by starting from a predetermined position, e.g. pre-positioning or reverse rotation
• CPC Class Codes: F02N 2019/008 the engine being stopped in a particular position
• CPC Class Codes: F02P 5/1504 with particular means during a transient phase, e.g. acceleration, deceleration, gear change during starting F02P5/1506

Abstract

When an engine stop demand is generated and an engine speed is less than or equal to a specified value Ne1, the engine speed is increased once and the engine stop control is started. Even if the engine speed is low at a time of the engine stop demand, the engine stop control period (engine rotational angle) can be ensured. The engine stop position can be controlled to a target stop position with high accuracy.

Claims

1. An engine stop control apparatus performing an engine stop control by a torque of an electric machinery in a manner that an engine stop position is controlled to a target stop position at a time of stopping an engine according to an engine stop demand, the engine stop control apparatus comprising;

an engine speed accelerator which starts the engine stop control after increasing an engine speed once when an engine stop demand is generated and the engine speed is lower than a specified value.

2. An engine stop control apparatus according to claim 1, wherein the engine speed accelerator includes a means for advancing an ignition timing to accelerate the engine speed.

3. An engine stop control apparatus according to claim 1, wherein the engine speed accelerator includes a means for stopping a compressor of an air conditioner which is driven by the engine to accelerate the engine speed.

4. An engine stop control apparatus according to claim 1, wherein the engine speed accelerator includes a means for increasing an intake air quantity to accelerate the engine speed.

5. An engine stop control apparatus according to claim 1, wherein the engine speed accelerator includes a means for increasing a fuel injection quantity to accelerate the engine speed.