Patents by Inventor Murray F. Busato

Murray F. Busato has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).

  • Patent number: 5499614
    Abstract: An on-board diagnostic system for an evaporative emission control system of an internal combustion engine powered vehicle employs a positive displacement reciprocating pump to create in evaporative emission space a pressure that differs significantly from ambient atmospheric pressure. The pump is powered by using engine intake manifold vacuum to force an intake stroke during which both an internal spring is increasingly compressed and a charge of ambient atmospheric air is created in an air pumping chamber space. Vacuum is then removed, and the spring relaxes to force a compression stroke wherein a portion of the air charge is forced into the evaporative emission space. The pump operation is under the control of a computer that contains an algorithm for operating the pump in particular modes of operation to arrive at a decision concerning integrity of the evaporative emission space against leakage.
    Type: Grant
    Filed: November 3, 1994
    Date of Patent: March 19, 1996
    Assignee: Siemens Electric Limited
    Inventors: Murray F. Busato, Paul D. Perry, John E. Cook
  • Patent number: 5474050
    Abstract: An on-board diagnostic system for an evaporative emission control system of an internal combustion engine powered vehicle employs a positive displacement reciprocating pump to create in evaporative emission space a pressure that differs significantly from ambient atmospheric pressure. The pump is powered by using engine intake manifold vacuum to force an intake stroke during which both an internal spring is increasingly compressed and a charge of ambient atmospheric air is created in an air pumping chamber space. Vacuum is then removed, and the spring relaxes to force a compression stroke wherein a portion of the air charge is forced into the evaporative emission space. The rate at which the pump reciprocates to alternately execute intake and compression strokes indicates the pressure and flow through a leak in the evaporative emission space. Detection of this rate serves as a measurement of leakage for the purpose of distinguishing integrity of the evaporative emission space from non-integrity.
    Type: Grant
    Filed: January 13, 1995
    Date of Patent: December 12, 1995
    Assignee: Siemens Electric Limited
    Inventors: John E. Cook, Murray F. Busato, Paul D. Perry
  • Patent number: 5411004
    Abstract: The tank/canister volume's integrity against unacceptable leakage measured by a diagnostic test performed by an on-board diagnostic system which includes an electrically operated air pump and tank-mounted analog pressure transducer. At the beginning of a test, the engine management computer closes the canister purge solenoid valve and operates the pump to begin pressurization of the tank/canister volume. The pumped air is introduced via the canister's atmospheric vent port at a regulated pressure. Failure to build tank pressure to a predetermined pressure within a predetermined time indicates a gross leak. If no gross leak exists, the pressure will build, and the time required to build to a given pressure from the start pressure provides a measurement of any leakage that may be present. The fuel fill level in the tank affects this time, and it is taken into account in the measurement.
    Type: Grant
    Filed: February 3, 1993
    Date of Patent: May 2, 1995
    Assignee: Siemens Automotive Limited
    Inventors: Murray F. Busato, John E. Cook
  • Patent number: 5383437
    Abstract: An on-board diagnostic system for an evaporative emission control system of an internal combustion engine powered vehicle employs a positive displacement reciprocating pump to create in evaporative emission space a pressure that differs significantly from ambient atmospheric pressure. The pump is powered by using engine intake manifold vacuum to force an intake stroke during which both an internal spring is increasingly compressed and a charge of ambient atmospheric air is created in an air pumping chamber space. Vacuum is then removed, and the spring relaxes to force a compression stroke wherein a portion of the air charge is forced into the evaporative emission space. The rate at which the pump reciprocates to alternately execute intake and compression strokes indicates the pressure and flow through a leak in the evaporative emission space. Detection of this rate serves as a measurement of leakage for the purpose of distinguishing integrity of the evaporative emission space from non-integrity.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: January 24, 1995
    Assignee: Siemens Automotive Limited
    Inventors: John E. Cook, Murray F. Busato, Gary L. Casey, John D. Hanson
  • Patent number: 5297529
    Abstract: The tank/canister volume's integrity against unacceptable leakage is either confirmed or denied by a diagnostic test performed by an on-board diagnostic system which includes an electrically operated air pump and tank-mounted analog pressure transducer. At the beginning of a test, the engine management computer closes the canister purge solenoid valve and operates the pump to begin pressurization of the tank/canister volume. The pumped air is introduced via the canister's atmospheric vent port so that the pressurizing air is entrained with fuel vapors previously collected in, but not yet purged from, the canister. Failure to build to a predetermined pressure within a predetermined time indicates a gross leak. Upon attainment of the predetermined pressure, the pump is shut off. If the pressure drops by more than a certain amount during the test, integrity is denied. If not, integrity is confirmed.
    Type: Grant
    Filed: January 27, 1993
    Date of Patent: March 29, 1994
    Assignee: Siemens Automotive Limited
    Inventors: John E. Cook, Murray F. Busato
  • Patent number: 5188141
    Abstract: A vacuum boost valve senses when the intensity of vacuum from a variable intensity vacuum source is about to drop below a threshold and supplies a boost so that when the intensity of the vacuum source is within a range immediately below the threshold, the intensity of vacuum delivered to a load does not drop below the intensity of the vacuum source and is in fact increased over what it would otherwise be without the boost. The vacuum boost is obtained by using a venturi.
    Type: Grant
    Filed: December 3, 1991
    Date of Patent: February 23, 1993
    Assignee: Siemens Automotive Limited
    Inventors: John E. Cook, Murray F. Busato, William C. Gillier
  • Patent number: 5146902
    Abstract: The tank/canister volume's integrity against unacceptable leakage is either confirmed or denied by a diagnostic test performed by an on-board diagnostic system which includes an electrically operated air pump and a pressure switch. At the beginning of a test, the engine management computer closes the canister purge solenoid valve and operates the pump to begin pressurization of the tank/canister volume. Failure to build to a predetermined pressure indicates a gross leak. Upon attainment of the predetermined pressure, the pump is shut off by the operation of the pressure switch from one state to another. The pressure switch has hysteresis so that if the pressure falls below the predetermined pressure by a certain amount during the predetermined duration of the test, the pressure switch returns to its one state thereby giving a signal denying the integrity. Integrity is confirmed by the pressure switch remaining in its another state during the test.
    Type: Grant
    Filed: December 2, 1991
    Date of Patent: September 15, 1992
    Assignee: Siemens Automotive Limited
    Inventors: John E. Cook, Murray F. Busato
  • Patent number: 5065575
    Abstract: An air flow/check valve for an exhaust emission system combines flow and check functions into a single valve which is especially well-suited for use with an electric motor driven air pump. The valving mechanism is operated by a fluid actuator, and pressure conditions in the actuator are controlled by sensing the pressure differential across the valving mechanism to close the valving mechanism when exhaust back pressure is indicative of causing potentially damaging backflow to the air pump. Several embodiments of the invention are disclosed.
    Type: Grant
    Filed: October 25, 1990
    Date of Patent: November 19, 1991
    Assignee: Siemens Automotive Limited
    Inventors: John E. Cook, Murray F. Busato