Patents Assigned to Siemens Automotive Limited
  • Patent number: 5495909
    Abstract: A radiator and condenser bridge the front of an engine bay of an automotive vehicle. An electric motor powered ducted fan is disposed directly behind and in enclosing relation to the radiator and condenser to draw air through the radiator and condenser and convey the hot effluent to a location outside the engine bay. While the bay is intended to be ventilated by ram air, any hot spots that may occur in or adjacent the bay, due to an insufficiency or complete lack of ram air, may be ventilated by providing an ejector in association with the ducted fan system. Effluent from the ducted fan is conveyed through the ejector, which by means of venturi effect, creates a relatively low pressure zone. A relatively higher pressure zone at a hot spot is connected by means of a ventilating conduit to the relatively lower pressure zone of the ejector. A ventilating flow is induced through the ventilating conduit and entrained with the effluent for ensuing discharge to a location outside the bay.
    Type: Grant
    Filed: March 1, 1993
    Date of Patent: March 5, 1996
    Assignees: Siemens Automotive Limited, Siemens Aktiengesellschaft
    Inventor: Herbert N. Charles
  • Patent number: 5448981
    Abstract: The evaporative emission control system for an internal combustion engine purges the vapor collection canister to the intake manifold through a purge regulator controlled by the engine ECU. The purge regulator comprises a diaphragm valve and an electronic vacuum regulator. The purge regulator functions to allow a purge flow rate correlated with a control signal from the engine ECU and manifold vacuum, to maintain the purge flow rate substantially constant in response to certain changes in the magnitude of manifold vacuum, and to re-adjust the purge flow rate in correlation with changes in the control signal from the engine ECU. The diaphragm valve comprises a tapered valve element that progressively reduces the flow restriction as the valve element is increasingly opened.
    Type: Grant
    Filed: August 16, 1994
    Date of Patent: September 12, 1995
    Assignee: Siemens Automotive Limited
    Inventors: John E. Cook, William C. Gillier
  • Patent number: 5424494
    Abstract: Noise is attenuated by a resonator having an inlet pipe leading to an expansion chamber and an outlet pipe leading from the expansion chamber. The two pipes are not aligned with each other at the expansion chamber. The portions of the two pipes proximate the expansion chamber contain respective venturis. The expansion chamber also functions as a Helmholtz resonator by providing the resonator with one or more apertures between the outlet pipe and the expansion chamber.
    Type: Grant
    Filed: December 10, 1992
    Date of Patent: June 13, 1995
    Assignee: Siemens Automotive Limited
    Inventors: Dennis E. Houle, Stephen E. Brackett
  • 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: 5326225
    Abstract: The fan blades have a particular geometry that combines high efficiency, low axial profile, and low noise in an axial flow fan. The fan also comprises a circular outer band that coacts with a surrounding shroud structure to form a labyrinth air seal. The shroud structure comprises two parts that cooperatively define a radially inwardly open groove within which a flange of the fan band is received to form the labyrinth seal.
    Type: Grant
    Filed: July 12, 1993
    Date of Patent: July 5, 1994
    Assignee: Siemens Automotive Limited
    Inventors: William P. Gallivan, Haran K. Periyathamby, Alex S. Joseph
  • Patent number: 5299811
    Abstract: An inexpensive, efficient seal member having a tubular housing member that can be integral to or attached to a frame of a motor to form a ring seal around the shaft of the motor prior to mating the shaft with a pump or other driven device. The flexible elastomer washer member is located in a pocket at the end of the housing. The inner diameter of the flexible elastomer washer member is smaller than the shaft diameter. The thickness of the flexible elastomer washer member is larger than the depth of the pocket and is held in the pocket by a resilient retaining member having a plurality of tangs forming an interference fit with the walls of the housing. Next, the shaft is slidably extended through the flexible elastomer washer member forming the ring seal.
    Type: Grant
    Filed: December 23, 1992
    Date of Patent: April 5, 1994
    Assignee: Siemens Automotive Limited
    Inventor: Peter A. Kershaw
  • 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: 5267470
    Abstract: An evaporative emission control system for an automotive vehicle comprises an integrated roll-over valve and vapor pressure sensor assembly mounted by means of a grommet in the top wall of the vehicle's fuel tank. The vapor pressure sensor forms part of an on-board diagnostic system for testing the integrity of the tank and vapor collection canister against leaks.
    Type: Grant
    Filed: April 30, 1992
    Date of Patent: December 7, 1993
    Assignee: Siemens Automotive Limited
    Inventor: John E. Cook
  • Patent number: 5244347
    Abstract: The fan has an outer circular band that is spaced axially rearwardly of the hub. Forwardly skewed blades extend between the band and hub. Each blade has a radially intermediate portion that has reverse curvatures, namely a radially inner section curving about a location that is axially rearwardly of the blade and a radially outer section curving about a location that is axially forwardly of the blade. The fan is disposed within an aperture of a shroud having a central mount for an electric motor that drives the fan. The shroud has radial members that extend from the edge of the shroud aperture to the hub and that contain an axial offset.
    Type: Grant
    Filed: October 11, 1991
    Date of Patent: September 14, 1993
    Assignee: Siemens Automotive Limited
    Inventors: William P. Gallivan, Haran K. Periyathamby
  • Patent number: 5237980
    Abstract: An irregularity that might otherwise be present in the flow characteristic of the system is cured by damping the motion of the armature of the CPS valve in two ways. One way comprises incorporating a "step" into the confronting faces of the armature and stator at their interface across the air gap. The other way comprises guiding the armature motion by means of a brass tube with sufficiently small running clearance such that pneumatic damping occurs.
    Type: Grant
    Filed: December 2, 1992
    Date of Patent: August 24, 1993
    Assignee: Siemens Automotive Limited
    Inventor: William C. Gillier
  • Patent number: 5230654
    Abstract: Each vertical vane contains two vane groups that are independently pivotable about their co-axis. A push button control mechanism selects between a jet setting in which both vane groups are parallel and a diffuse setting in which the two vane groups are non-parallel. The mechanism has a detent feature that keeps the diffuse setting until released.
    Type: Grant
    Filed: June 30, 1992
    Date of Patent: July 27, 1993
    Assignee: Siemens Automotive Limited
    Inventor: Stephen F. Bloomer
  • Patent number: 5226398
    Abstract: The evaporative emission control system for an internal combustion engine purges the vapor collection canister to the intake manifold through a purge regulator controlled by the engine ECU. The purge regulator comprises a diaphragm valve and an electronic vacuum regulator. The purge regulator functions to allow a purge flow rate correlated with a control signal from the engine ECU and manifold vacuum, to maintain the purge flow rate substantially constant in response to certain changes in the magnitude of manifold vacuum, and to re-adjust the purge flow rate in correlation with changes in the control signal from the engine ECU. The diaphragm valve comprises a tapered valve element that progressively reduces the flow restriction as the valve element is increasingly opened.
    Type: Grant
    Filed: September 30, 1992
    Date of Patent: July 13, 1993
    Assignee: Siemens Automotive Limited
    Inventors: John E. Cook, William C. Gillier
  • Patent number: 5211139
    Abstract: A shaft-door unit that is operable for selecting the effective lengths of runners leading from a plenum is assembled into the manifold by lengthwise insertion through an opening in an end wall of the plenum that is subsequently closed by a closure member. The shaft-door unit may include as part of the unit, a journal sleeve for journaling the shaft or a tray which incoproates the journal sleeve.
    Type: Grant
    Filed: September 8, 1992
    Date of Patent: May 18, 1993
    Assignee: Siemens Automotive Limited
    Inventors: Dennis E. Houle, Stephen E. Brackett, Lisa A. Whaley
  • Patent number: 5199404
    Abstract: The evaporative emission control system for an internal combustion engine purges the vapor collection canister to the intake manifold through a purge regulator controlled by the engine ECU. The purge regulator comprises a diaphragm valve and an electronic vacuum regulator. The purge regulator functions to allow a purge flow rate correlated with a control signal from the engine ECU and manifold vacuum, to maintain the purge flow rate substantially constant in response to certain changes in the magnitude of manifold vacuum, and to re-adjust the purge flow rate in correlation with changes in the control signal from the engine ECU. The diaphragm valve comprises a tapered valve element that progressively reduces the flow restriction as the valve element is increasingly opened.
    Type: Grant
    Filed: June 27, 1991
    Date of Patent: April 6, 1993
    Assignee: Siemens Automotive Limited
    Inventors: John E. Cook, William C. Gillier
  • Patent number: 5191870
    Abstract: An on-board diagnostic system determines if there is a leak in the portion of a canister purge system that includes the fuel tank and the canister that collects volatile fuel vapors from the fuel tank's headspace. A vacuum regulator/sensor placed in the conduit between the CPS valve and the canister, includes a switch providing a signal indicating the presence or absence of a leak. The sensor also indicates both positive and negative pressures relative to a reference pressure such as atmosphere. During diagnostic testing, the switch is closed and if the switch becomes open this indicates a leak in the headspace of fuel tank on the canister.
    Type: Grant
    Filed: October 2, 1991
    Date of Patent: March 9, 1993
    Assignee: Siemens Automotive Limited
    Inventor: John E. Cook
  • 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: 5184773
    Abstract: A pressure relief function is incorporated into a proportional solenoid controlled heater valve for an automobile heater. One of two internal valve seats is spring-biased against an internal shoulder and is exposed to pressure differential across it. When inlet pressure from the engine coolant pump seeks to rise above a predetermined level, the spring-loaded seat unseats thereby diverting some of the flow away from the heater core and back to the pump inlet.
    Type: Grant
    Filed: June 24, 1992
    Date of Patent: February 9, 1993
    Assignee: Siemens Automotive Limited
    Inventor: Gary M. Everingham
  • Patent number: 5183022
    Abstract: A multi-slope canister purge solenoid (CPS) valve has a diaphragm-controlled valve downstream of the solenoid-actuated valve. The diaphragm-controlled valve has two diaphragms that between themselves define a chamber space that is communicated to intake manifold vacuum. One of the two diaphragms is exposed to atmospheric pressure while the other is exposed to the interior of the CPS valve.
    Type: Grant
    Filed: July 16, 1991
    Date of Patent: February 2, 1993
    Assignee: Siemens Automotive Limited
    Inventor: John E. Cook
  • Patent number: 5183023
    Abstract: The canister's inlet port is communicated to the fuel tank headspace through a first conduit, its outlet port is communicated through a second conduit containing the purge control valve to a location in the air intake system that is downstream of the throttle plate, and its atmospheric vent port is communicated through a third conduit to a location in the air intake system that is between the air filter and the supercharger, rather than directly to atmosphere. During non-supercharged operation of the engine, vapors in the canister are purged through the second conduit and purge control valve in the usual manner and air enters the canister through the third conduit. During supercharged operation, the purge flow is reversed such that purged vapors pass through the third conduit while the purge valve maintains control over the purge flow.
    Type: Grant
    Filed: November 1, 1991
    Date of Patent: February 2, 1993
    Assignee: Siemens Automotive Limited
    Inventor: John D. Hanson