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Vapor recovery control system for direct injection spark ignition engines

  • US 5,950,603 A
  • Filed: 05/08/1998
  • Issued: 09/14/1999
  • Est. Priority Date: 05/08/1998
  • Status: Expired due to Term
First Claim
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1. A vapor recovery control system for a spark ignited engine having an air intake with a throttle positioned therein, said engine having a first set of cylinders and a second set of cylinders, said system comprising:

  • a vapor recovery system coupled to the engine for delivering purge vapor to the first set of cylinders;

    a control valve positioned between said vapor recovery system and the first set of cylinders; and

    a controller for actuating said control valve in response to a purge signal, operating said first set of cylinders in a homogeneous mode of operation with a homogeneous mixture of air and fuel in said first set of cylinders by injecting during an intake stroke, and operating said second set of cylinders in a stratified mode of operation with a stratified mixture of air and fuel in said second set of cylinders by injecting during a compression stroke.

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