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Apparatus for disconnecting individual cylinders on an internal combustion engine

  • US 5,138,992 A
  • Filed: 01/15/1992
  • Issued: 08/18/1992
  • Est. Priority Date: 02/16/1991
  • Status: Expired due to Fees
First Claim
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1. An apparatus for disconnecting individual cylinders of an internal combustion engine (11), having a fuel injection pump (10) that has at least two partial suction chambers (14, 15) that can be deactivated from one another and are associated with different cylinders (13a, 13b) of the engine (11), a feed pump (30) which for operation of the cylinders (13a) pumps fuel from a fuel supply tank (20) into the applicable partial suction chamber (15), wherein to deactivate the cylinders (13a) the delivery of fuel from the feed pump (30) to the applicable partial suction chamber (15) is interrupted by means of a reversing valve (31;

  • 53) introduced between the feed pump (30) and the partial suction chamber (15), the reversing valve (31;

         53), is in a pumping position for operation of the deactivatable cylinders (13a), the intake side of the feed pump (30) communicates with the fuel supply tank (20) and the pressure side of the feed pump (30) communicates with the partial suction chamber (15), and by means of which, in a deactivation position for deactivating the cylinders (13a), the intake side of the feed pump (30) is switched by the reversing valve to communicate with the partial suction chamber (15), and the pressure side of the feed pump communicates with the fuel supply tank (20).

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