Eric G Zbytowski

US Patent:

7240896, Jul 10, 2007

Filed:

May 5, 2005

Appl. No.:

11/122499

Inventors:

Gary U. Gliniecki - Ruth MI, US
Larry D. Whittaker - Cass City MI, US
Eric G. Zbytowski - Caro MI, US

Assignee:

Walbro Engine Management, L.L.C. - Tucson AZ

International Classification:

F02M 3/08

US Classification:

261 71, 261DIG 38, 261DIG 84

Abstract:

A carburetor fuel adjustment assembly includes a low speed needle valve and preferably a high speed needle valve threaded into respective receptacles of a carburetor body. Each receptacle defines an elongated cavity which intersects a fuel passage and has a valve orifice or seat. Each needle valve has a shank which threadably engages the respective receptacles and a tip that extends into the axially-aligned orifice or seat. The tip is axially movable relative to the orifice by rotation of the needle valve to control the size of the opening between the valve and orifice for fuel flow. A resilient body cooperates with the valve shank in laterally biasing the tip into a steadfast position relative to the orifice or seat. The lateral bias assures constant area for fuel flow through the orifice by resisting needle movement until a sufficient torque is intentionally applied to the needle valve.

US Patent:

7717403, May 18, 2010

Filed:

Feb 25, 2008

Appl. No.:

12/036696

Inventors:

Eric G. Zbytowski - Alpena MI, US

Assignee:

Walbro Engine Management, L.L.C. - Tucson AZ

International Classification:

F02M 7/08

US Classification:

261 342

Abstract:

According to one implementation, a carburetor includes an intake bore, a throttle valve, a main fuel nozzle, an accelerator device and a fuel passage. The throttle valve is movable between an idle and wide open positions and includes a shaft rotatably supported around an axial line extending across the intake bore. The accelerator device may be operable to increase an amount of fuel that flows through the main fuel nozzle when the throttle valve is moved toward its wide open position, and may include a fuel reservoir constructed and arranged to store fuel. The fuel passage communicates with the main fuel nozzle and the fuel reservoir is provided upstream of the main fuel nozzle such that fuel flows through the fuel reservoir before being delivered to the main fuel nozzle.

US Patent:

8286614, Oct 16, 2012

Filed:

Dec 6, 2008

Appl. No.:

12/329567

Inventors:

Eric G Zbytowski - Alpena MI, US

Assignee:

Walbro Engine Management, L.L.C. - Tucson AZ

International Classification:

F02M 5/10
F02M 3/10
E03B 1/00
E03B 3/00
F16K 27/08
F16L 35/00
F16P 1/00
F17D 1/00

US Classification:

123517, 261 71, 261DIG 84, 137382, 1373825

Abstract:

An adjustment limiting device for a carburetor including a fuel adjustment valve rotatable to adjust a supply of fuel in or delivered from the carburetor includes an adjustment limiting cap and a connector. The adjustment limiting cap is adapted to be disposed over a portion of the fuel adjustment valve and includes a rotary connection feature adapted to limit relative rotational movement between the adjustment limiting cap and the fuel adjustment valve, and a rotation limiter to limit rotational movement of the adjustment limiting cap. The connector may be carried by the adjustment limiting cap to maintain the adjustment limiting cap on the fuel adjustment valve. The connector may be concealed by the carburetor body, permit the adjustment limiting cap to be fitted onto the fuel adjustment valve, and prevent the adjustment limiting cap from being removed from the fuel adjustment limiting valve.

US Patent:

20040182366, Sep 23, 2004

Filed:

Jan 27, 2004

Appl. No.:

10/765415

Inventors:

Martin Andersson - Caro MI, US
Kevin Born - Cass City MI, US
George Pattullo - Caro MI, US
Eric Zbytowski - Caro MI, US

International Classification:

F02P005/00

US Classification:

123/406470, 123/406560

Abstract:

A control system for a low cost, light duty combustion engine, where the control system generally utilizes engine speed or engine speed and temperature input signals and independent operating sequences to determine a desired ignition timing and air-to-fuel ratio for a combustible mixture. There are several independent operating sequences, each one of which is designed to optimally control the engine under certain conditions. These operating sequences include a Cranking sequence that commences after the engine is initially turned on, a Warm Up sequence which follows the Cranking sequence, a Normal Mode sequence which is the operational mode in control under typical operating conditions, an Acceleration sequence which is called upon if the Normal Mode ever detects an increase in engine speed exceeding a predetermined rate, a Come Down sequence which is initiated if the Normal Mode senses a sufficient engine speed followed by a certain decrease in speed, and a Recovery Bump sequence which the Normal Mode calls up if the engine speed dips below a predetermined level. By utilizing these operational sequences and an engine speed input signal, the control system of the present invention improves the engine performance and emissions of a low cost, light duty engine across a wide array of conditions.

US Patent:

20100219817, Sep 2, 2010

Filed:

Apr 30, 2010

Appl. No.:

12/771331

Inventors:

William E. Galka - Caro MI, US
Bradley J. Roche - Cass City MI, US
David L. Speirs - Cass City MI, US
Eric G. Zbytowski - Alpena MI, US

Assignee:

WALBRO ENGINE MANAGEMENT, L.L.C. - Tucson AZ

International Classification:

G01B 7/30

US Classification:

32420725

Abstract:

A rotary position sensor for determining the rotary position of a rotary component may include a sensor and a magnet. The sensor may be responsive to a characteristic of a magnetic field that changes as the magnetic field moves. The magnet may be carried by the rotary component for rotation with the rotary component and have an anti-rotation feature to prevent rotation of the magnet relative to the rotary component to maintain a desired rotary position of the magnet.

US Patent:

20130054121, Feb 28, 2013

Filed:

Aug 21, 2012

Appl. No.:

13/590500

Inventors:

Massimo Casoni - Castelfranco Emilia (MO), IT
William E. Galka - Caro MI, US
Bradley J. Roche - Cass City MI, US
David L. Speirs - Cass City MI, US
Mark S. Swanson - Cass City MI, US
Eric G. Zbytowski - Caro MI, US

Assignee:

WALBRO ENGINE MANAGEMENT, L.L.C. - Tucson AZ

International Classification:

F02D 41/26
F02F 7/00
B23P 6/00
F02D 41/34
F02D 41/30
F02M 69/50
F02P 15/00

US Classification:

701104, 123689, 123319, 123195 R, 123195 C, 701103, 12340619, 701105, 29888011

Abstract:

An engine system may include a fuel and air supply circuit and an exhaust circuit, a temperature sensor mounted on an exterior of the engine and an oxygen sensor located in the exhaust circuit. The fuel and air supply circuit may include a throttle body mounted on the engine and having a throttle valve to control the flow rate of air delivered to the engine, a fuel injector carried by the throttle body to deliver fuel to the engine and a fuel rail carried by at least one of the throttle body and the fuel injector and having an input to receive a supply of fuel and an outlet through which fuel is routed to the fuel injector. An engine control unit may be communicated with these components to control the fuel and air mixture provided to the engine as a function of the temperature and oxygen sensor outputs.

US Patent:

20230087858, Mar 23, 2023

Filed:

Nov 17, 2022

Appl. No.:

17/988946

Inventors:

- Tucson AZ, US
Andreas D. M. Dixon - Cass City MI, US
Eric G. Zbytowski - Caro MI, US
Albert L. Sayers - Caro MI, US
Justin T. Dolane - Cass City MI, US
David L. Speirs - Cass City MI, US
William E. Galka - Caro MI, US
Duried F. Rabban - Henderson NV, US
Bradley J. Roche - Millington MI, US

International Classification:

F02M 69/04
F02M 19/10
F02M 19/02
F02M 19/08
F02M 7/18
F02D 9/10
F02M 63/00

Abstract:

A throttle body assembly for a combustion engine includes a throttle body having a pressure chamber including a supply of liquid fuel, and a throttle bore with an inlet through which air is received. A throttle valve is carried by the throttle body with a valve head movable relative to the throttle bore. A metering valve is coupled to the throttle body, and has a valve element that is movable between open and closed positions. A boost venturi is located in the throttle bore and has an inner passage that is open at both ends to the throttle bore. The boost venturi has an opening through which fuel flows into the inner passage when the valve element is in the open position, wherein fuel flows from the pressure chamber to the metering valve under the force of gravity or under a pressure of less than 6 psi.

US Patent:

20210317809, Oct 14, 2021

Filed:

Jun 23, 2021

Appl. No.:

17/355895

Inventors:

- Tucson AZ, US
Andreas D. M. Dixon - Cass City MI, US
Eric G. Zbytowski - Caro MI, US
Albert L. Sayers - Caro MI, US
Justin T. Dolane - Cass City MI, US
David L. Speirs - Cass City MI, US
William E. Galka - Caro MI, US
Duried F. Rabban - Henderson NV, US
Bradley J. Roche - Millington MI, US

International Classification:

F02M 69/04
F02M 19/10
F02M 19/02
F02M 19/08
F02M 7/18
F02D 9/10
F02M 63/00

Abstract:

A throttle body assembly for a combustion engine includes a throttle body having a pressure chamber including a supply of liquid fuel, and a throttle bore with an inlet through which air is received. A throttle valve is carried by the throttle body with a valve head movable relative to the throttle bore. A metering valve is coupled to the throttle body, and has a valve element that is movable between open and closed positions. A boost venturi is located in the throttle bore and has an inner passage that is open at both ends to the throttle bore. The boost venturi has an opening through which fuel flows into the inner passage when the valve element is in the open position, wherein fuel flows from the pressure chamber to the metering valve under the force of gravity or under a pressure of less than 6 psi.