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Dynamic Cylinder Deactivation with Residual Heat Recovery

  • US 20100050993A1
  • Filed: 08/28/2009
  • Published: 03/04/2010
  • Est. Priority Date: 08/29/2008
  • Status: Abandoned Application
First Claim
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1. A method for deactivating cylinders in a multiple cylinder internal combustion engine with electronically controlled multiple point fuel injection comprising:

  • (a) deactivating individual cylinders by interrupting fuel injections electronically;

    (b) deactivating only one cylinder at any moment of engine operation sequence;

    (c) deactivating only one cycle for each cylinder at each deactivation;

    (d) reactivating every deactivated cylinder right after every single cycle deactivation;

    (e) deactivating every individual cylinder within the engine dynamically;

    (f) deactivating every individual cylinder within the engine alternatively;

    (g) deactivating only active hot cylinders that have just burned with air-fuel mixture during the previous engine cycle(s);

    (h) deactivating individual cylinders in a way to keep engine thermal balance between cylinders;

    (i) deactivating individual cylinders in a way to keep engine mechanical balance between cylinders;

    (j) deactivating individual cylinders in a way to keep even deactivation space along engine operation sequence;

    (k) deactivating individual cylinders in a way to keep best engine overall torque balance;

    (l) keeping both intake and exhaust valves operating with original working sequence;

    (m) utilizing inhaled fresh air as secondary engine working fluid inside deactivated cylinders;

    (n) recovering residual heat inside deactivated cylinders;

    (o) expanding air to extract additional mechanical work through deactivated cylinders; and

    (p) performing forced internal air-cooling inside the deactivated cylinders.

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