Delphi Technologies, Inc.

Gm Global Technolgoy Operations, Inc.

Tom Cheuk-In Wong

Albert Cheuk-Yin Wong

Johnny M Paris

Albert C Wong

Tomy Sebastian

Sayeed Ahmad Mir

Christian E Ross

James Leroy Davison

Shaotang Chen

Carl D Tarum

David Fredrick Hammerbacher

Gary Ray Minnis

Kevin Mark McClendon

James Michael Shea

Robert Edward Beyerlein

Allan Lee Dickinson

A method of interfacing an electromagnetic sensor with a controller in a motor control system, the method including: applying an excitation signal to the electromagnetic sensor; receiving a first electromagnetic sensor output signal based on the excitation signal, the first electromagnetic sensor signal comprising an amplitude modulated signal corresponding to a position of a rotor of the electromagnetic sensor; and receiving a second electromagnetic sensor output signal based on the excitation signal, the second electromagnetic sensor signal comprising another amplitude modulated signal corresponding to the position of the rotor of the electromagnetic sensor. The method also includes sampling the first electromagnetic sensor signal and the second electromagnetic sensor signal at about an instance synchronous with the excitation signal to demodulate the first electromagnetic sensor signal and the second electromagnetic sensor signal and decoding a resultant of the sampling to identify the position of a rotor of the electromagnetic sensor.

Electromagnetic sensor direct communication algorithm to a digital microprocessor

A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber of cam ring disposed between a pressed plate and a pressure plate. The rotor has opposite sides and a peripheral outer surface in which radial vane slots are formed and guide slideable vanes. The rotor is coated on its surfaces with a film of abradable coating material which reduces the operating clearance between the rotor and the thrust and pressure plates and cam ring so as to increase the volumetric efficiency of the pump.

Vane pump having an abradable coating on the rotor

A multi-vane hydraulic motor for accessory drive in which the vanes of a hydraulically balanced rotor are primarily urged into operative engagement with a surrounding cam by forces of the hydraulic fluid in undervane passage produced by an associated hydraulic pump to eliminate requirement for biasing springs and spring attachment of prior art motor. A high pressure chamber provided between the motor housing and a pressure plate mounted therein is hydraulically connected to the vane chambers of the rotor of the motor for the hydraulic drive thereof. An end cap closing the motor housing has the hydraulic input and output lines operatively connected thereto.

Hydraulically balanced multi-vane hydraulic motor

A vane pump includes a cylindrical rotor rotatable inside of an oval-shaped rotor chamber defined by a cam ring around the rotor. A thrust plate and a pressure plate on opposite sides of the cam ring cover the rotor chamber and are squeezed together by a pressure force attributable to fluid in a discharge chamber of the vane pump at a discharge pressure thereof. A first thrust face of the thrust plate is pressed against an end wall of a cavity of a pump housing in which the components are installed. Fluid at the discharge pressure is ported to one or more balance chambers between the thrust plate and the end wall of the housing. The balance chambers are defined by a gasket received in a groove of the first thrust face. Fluid at the discharge pressure within the balance chamber balances a fraction of the pressure force on the thrust plate on an opposite second thrust face thereof attributable to fluid discharged from a rotor chamber in which the rotor operates, in order to place the thrust plate in axial static equilibrium.

Vane pump

The pump has a multi-vane rotor operating within a cam ring to pump oil to a component such as a power steering gear. The pump rotor sandwiched between stationary thrust and pressure plates is supplied with oil from a surrounding fluid chamber through aligned intake ports in the two plates. Fluid chambers formed between the reciprocating vanes of the rotor discharges oil into axially aligned discharge ports of the thrust and pressure plates. The discharge port of the thrust plate is hydraulically connected to the discharge port of the pressure plate . Pressure oil in the discharge port of the pressure plate feeds into a system pressure chamber outboard of the pressure plate. Oil in the system pressure chamber is fed back to a first side chamber of the rotor through at least one simple flow passage in the pressure plate. The first side chamber is formed between inner and outer lands on the rotor. A second side chamber is similarly formed on the opposite side of the rotor and is hydraulically interconnected to the first side chamber by the undervane passages. With the pump rotating, the undervane chambers are pressurized by the supply of pressure oil to the side chambers through the straight through passage in the pressure plate to assure engagement of the vanes with the operative surface of the cam ring.

Rotary hydraulic vane pump with improved undervane porting

The fluid reservoir of a hydraulic system is fitted with a nozzle having a constricted primary discharge opening for directing an accelerated jet stream of hydraulic fluid returned to the reservoir from a pump back to an inlet of the pump. The jet stream aspirates additional fluid from the reservoir to boost the supply to the pump to minimize cavitation for quiet operation. The nozzle includes at least one bleed hole located upstream of the primary discharge opening through which a fraction of the fluid stream escapes into the reservoir and is permitted to dwell for a time sufficient to allow natural separation of entrained gas from the fractional stream before being drawn into the reservoir outlet by the jet stream.

Hydraulic pump having low aeration single return boost reservoir

A vane pump including a cylindrical rotor rotatable inside of an oval-shaped rotor chamber defined by a cam ring around the rotor. A thrust plate and a pressure plate on opposite sides of the cam ring cover the rotor chamber and are squeezed together by a pressure force attributable to fluid in a discharge chamber of the vane pump at a discharge pressure thereof. Fluid at the discharge pressure of the pump is ported to an annular first longitudinal balance chamber between the pressure plate and an end of the rotor facing the pressure plate and to an annular second longitudinal balance chamber between the thrust plate and an opposite end of the rotor facing the thrust plate. A pressure force on the pressure plate attributable to fluid in the first balance chamber balances a fraction of the pressure force on the pressure plate attributable to fluid in the discharge chamber to reduce flexure of the pressure plate into the rotor chamber. A pressure force on the rotor attributable to fluid in the second balance chamber is equal to the pressure force on the rotor attributable to fluid in the first balance chamber for longitudinal static equilibrium.

A motor vehicle hydraulic system including a power steering pump, a reservoir, a steering assist fluid motor, and a second fluid motor for a radiator cooling fan. A flow control valve remote from the power steering pump divides the total fluid flow from the power steering pump into a high flow branch and a low flow branch. Fluid circulates in the low flow branch at a substantially constant flow rate for a proportional control valve for the steering assist fluid motor and returns to the reservoir through an unrestricted tubular boss on the reservoir. Fluid in the high flow branch issues as a jet stream from a nozzle on the reservoir into a venturi passage submerged in fluid in the reservoir. The venturi passage is connected to an inlet port of the power steering pump. The jet stream aspirates fluid from the reservoir into the venturi passage. The kinetic energy of the jet stream is converted into superatmospheric pressure at the inlet port of the power steering pump to suppress cavitation. Fluid from the low flow branch dwells in the reservoir for a time duration adequate for natural release therefrom of any entrained gas bubbles.

Growing community of inventors

Saginaw, MI, United States of America

Tom Cheuk-In Wong