Start controller for engine

Patent metadata

Field	Value
Publication number	US-10337481-B2
Application number	US-201715673875-A
Country	US
Kind code	B2
Filing date	Aug 10, 2017
Priority date	Aug 25, 2016
Publication date	Jul 2, 2019
Grant date	Jul 2, 2019

Abstract

In the cases where a reverse operation of a crankshaft is performed after fuel injection and ignition in a cylinder in a power stroke and it is determined that an engine start is failed, a starter motor is operated, and fuel injection and ignition are executed in the cylinder in the compression stroke to start an engine.

First claim

What is claimed is:

1. A start controller for an engine, the engine including a plurality of cylinders and a crankshaft, and the engine being a cylinder-injection engine, the start controller comprising:
a starter motor; and
an electronic control unit configured to
execute fuel injection and ignition in a cylinder in an expansion stroke when a restart condition is established immediately before a stop of the engine,
determine whether a reverse operation of the crankshaft has been performed after the fuel injection and the ignition in the cylinder in the expansion stroke are executed, and
operate the starter motor and execute the fuel injection and the ignition in a cylinder in a compression stroke to start the engine, when the electronic control unit determines that the reverse operation of the crankshaft has been performed.

2. The start controller according to claim 1 , wherein
the electronic control unit is configured to
determine whether rotation of the crankshaft has been stopped after the fuel injection and the ignition in the cylinder in the expansion stroke are executed, and
operate the starter motor and execute the fuel injection and the ignition in the cylinder in the compression stroke to start the engine, when the electronic control unit determines that the rotation of the crankshaft has been stopped.

Assignees

• Toyota Motor Co Ltd

Inventors

• Enomoto Hiroshi

Classifications

• F02N11/0848 Primary

  with means for detecting successful engine start, e.g. to stop starter actuation · CPC title

• F02N2300/2002

  using different starting modes, methods, or actuators depending on circumstances, e.g. engine temperature or component wear · CPC title

• F02N11/0814

  comprising means for controlling automatic idle-start-stop · CPC title

• F02N2250/04

  Reverse rotation of the engine · CPC title

• F02N99/004

  Generation of the ignition spark · CPC title