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Internal combustion engine having solenoid-operated valves and control method

  • US 6,332,446 B1
  • Filed: 05/01/2000
  • Issued: 12/25/2001
  • Est. Priority Date: 05/21/1999
  • Status: Expired due to Fees
First Claim
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1. An internal combustion engine comprising:

  • a plurality of cylinders;

    at least one solenoid-operated intake valve and at least one solenoid-operated exhaust valve associated with each of said plurality of cylinders; and

    a controller that operates at least one of the plurality of cylinders as an inactive cylinder in a cylinder deactivation mode in which an intake stroke, a combustion stroke, and an exhaust stroke are inhibited and that controls a pressure within the inactive cylinder that is operated in the cylinder deactivation mode, wherein the controller controls the pressure within the inactive cylinder by opening and closing the exhaust valve associated with the inactive cylinder and the controller operates at least one inactive cylinder pre-selected from the plurality of cylinders in the cylinder deactivation mode and increases the pressure within the inactive cylinder.

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