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START-UP CONTROL DEVICE FOR ENGINE

  • US 20180112610A1
  • Filed: 10/24/2017
  • Published: 04/26/2018
  • Est. Priority Date: 10/25/2016
  • Status: Active Grant
First Claim
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1. A start-up control device for an engine, the device comprising:

  • an electronic control unit configured to start up a direct injection engine by executing fuel injection and ignition into a cylinder in an expansion stroke, when a restart condition is established immediately before a stoppage of the engine, wherein;

    when a crankshaft reversely rotates before a stoppage of rotation of the crankshaft, the electronic control unit is configured to cause a fuel injection valve to inject fuel into the cylinder in the expansion stroke, and is configured to control an amount of fuel injection in accordance with an amount of air in the cylinder in the expansion stroke such that an air-fuel ratio of a mixture of the fuel and the air reaches a target air-fuel ratio; and

    the electronic control unit is configured todetermine whether or not an exhaust valve is opened at a time of reverse rotation of the crankshaft, anddetermine the amount of fuel injection in accordance with a change in the amount of air in the cylinder due to exchange of gas with an exhaust path, when the electronic control unit determines that the exhaust valve is opened.

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