System Configured to Pump Fuel

摘要

A fuel pump system configured to control a pressure pulse within a fuel system. The fuel pump system includes a conduit and a pump fluidly coupled to the conduit. The conduit has a conduit volume and is configured to contain fuel within. The pump includes a first pump stage in which the pump defines a maximum pump displacement and a second pump stage in which the pump defines a minimum pump displacement. The pump is configured to provide an output mass of fuel to the conduit when the pump transitions from the first pump stage to the second pump stage, causing pressure of the fuel within the conduit to pulse. The maximum pump displacement is set to a value defined by a ratio of the output mass of fuel per the conduit volume needed to maintain the pressure pulse in the conduit within a predetermined pressure pulse range.

主权项

1. A fuel system comprising:
a conduit having a conduit volume, the conduit configured to contain a fuel at a first fuel pressure and a second fuel pressure that is different from the first fuel pressure; and a pump fluidly coupled to the conduit, the pump including a first pump stage in which the pump defines a maximum pump displacement and a second pump stage in which the pump defines a minimum pump displacement, the pump being configured to provide an output mass of fuel to the conduit when the pump transitions from the first pump stage to the second pump stage, wherein for each transition from the first pump stage to the second pump stage the fuel in the conduit transitions from the first fuel pressure to the second fuel pressure, wherein a difference between the first fuel pressure and the second fuel pressure defines a pressure pulse, wherein the maximum pump displacement is set to a value defined by a ratio of the output mass of fuel per the conduit volume needed to maintain the pressure pulse within a predetermined pressure pulse range.