Arthur J Varady

US Patent:

6439039, Aug 27, 2002

Filed:

Sep 4, 2001

Appl. No.:

09/682441

Inventors:

Lynn Edward Davison - Saline MI
Arthur Joseph Varady - Chelsea MI
Cheryl Jeanette Stark - Canton MI
John Michael Kacewicz - Riverview MI

Assignee:

Ford Global Technologies, Inc. - Dearborn MI

International Classification:

G01M 1500

US Classification:

731173

Abstract:

Methods of utilizing engine crankshaft acceleration to monitor cold start spark retard are presented. A first method utilizes a variance in a crankshaft acceleration based deviation signal and looks for changes in the variance to confirm if cold spark retard has occurred by the ignition system. In a second method, a threshold level of a group of cylinder crankshaft acceleration deviation signals , can be detected and compared to a level of crankshaft deviant acceleration when normal spark is commanded to determine if commanded spark retard has been realized.

US Patent:

6591666, Jul 15, 2003

Filed:

Oct 15, 1998

Appl. No.:

09/173191

Inventors:

John Michael Kacewicz - Riverview MI
Arthur Joseph Varady - Chelsea MI

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

G01M 1500

US Classification:

731173

Abstract:

An engine misfire detection circuit and method for operation includes a reference window generator that generates a misfire window reference signal having a misfire sampling window. A misfire window calculator is coupled to a condition variable input and the reference window generator. The condition varying input may be a filter input or an input from various engine sensors. The misfire window calculator calculates an offset for adjusting the sampling window in response to the condition variable input.

US Patent:

6938606, Sep 6, 2005

Filed:

Sep 19, 2003

Appl. No.:

10/605285

Inventors:

Jae Doo Chung - Westland MI, US
Arthur Joseph Varady - Chelsea MI, US
Marsha Wendel - New Boston MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F02B075/12

US Classification:

123198DB

Abstract:

A method is provided for controlling an engine in a vehicle to facilitate determination of engine position sensor correction factors. The vehicle includes a motor, which is operatively connected to the engine, a sensor configured to detect engine position, and a controller, which is in communication with the engine, the sensor and the motor. It is determined when an engine shutdown is requested, for example, when the controller commands the vehicle to be powered by the motor. It is next determined whether engine position sensor correction factors are known. If they are, the engine control routine is stopped. If the correction factors are not known, fuel to the engine is discontinued, and the motor is employed to spin the engine at an approximately constant speed. The engine position sensor correction factors can then be determined while the engine is rotating in a defueled state.

US Patent:

63136252, Nov 6, 2001

Filed:

Jan 19, 1999

Appl. No.:

9/232607

Inventors:

Arthur Joseph Varady - Chelsea MI
John Michael Kacewicz - Riverview MI
Robert Joseph Dalbo - Allen Park MI
Sheran Anthony Alles - Westland MI
Thomas J. Hermann - Troy MI

Assignee:

Ford Global Technologies, Inc. - Dearborn MI

International Classification:

G01B 730
G01P 348

US Classification:

32420725

Abstract:

A rotational sensing assembly including a ferromagnetic sensor wheel rotationally fixed to a shaft having a tooth pattern including a missing tooth. An inductive sensor is mounted adjacent the periphery of the sensor wheel and in communication with a processor. The sensor produces a generally sinusoidal signal in response to the wheel rotation, with voltage zero crossings that are time stamped by the processor. The geometry of the sensor wheel around the missing tooth location is altered to equalize the induced voltage in the sensor for fixed time intervals in order to maintain proper timing of the zero crossings in the sensor signal.

US Patent:

61121495, Aug 29, 2000

Filed:

Jun 28, 1999

Appl. No.:

9/340825

Inventors:

Arthur Joseph Varady - Chelsea MI
John Michael Kacewicz - Riverview MI
Robert Joseph Dalbo - Allen Park MI

Assignee:

Ford Global Technologies, Inc. - Dearborn MI

International Classification:

G01M 1500

US Classification:

701111

Abstract:

An improved misfired detection system and method for high data rate engine control systems. A method of detecting misfires of individual cylinder events in an internal combustion engine is disclosed which includes the step of generating a high data rate velocity signal indicative of the torque behavior of the engine. The velocity signal is then filtered and separated into a plurality of non-interlaced homogeneous data sets wherein each of the data sets represents like portions of the internal combustion engine cycle. A median filter is then applied to each of the plurality of non-interlaced homogeneous data sets. In this manner, the data sets are normalized according to the applied recursive median filter and centered about a relative zero. This centering effect allows the signals to be recombined after filtering, thereby monitoring the nature of any deviations present in the signal. A threshold comparison of the resulting signal is then made to determine whether a misfire has occurred.

US Patent:

57009546, Dec 23, 1997

Filed:

Oct 31, 1996

Appl. No.:

8/740577

Inventors:

Satyadeo Narain Sinha - Canton MI
Arthur Joseph Varady - Chelsea MI
Richard John Gilbert - Braintree, GB2

Assignee:

Ford Global Technologies, Inc. - Dearborn MI

International Classification:

G01M 1500

US Classification:

73116

Abstract:

A misfire correction factor is included in the calculation of the fuel pulse width so that upon detection of a misfire, the excess fuel that would normally have entered the engine is offset or canceled, thus reducing or desensitizing the effects of the reaction of the lean biased exhaust gas oxygen sensor signal. This compensation allows for normally firing cylinders to operate closer to stoichiometric air/fuel ratio when other cylinders are operating in a misfire condition. The fuel adjustment due to engine misfire not only protects against catalyst degradation, but also decreases unwanted emissions.

US Patent:

62293028, May 8, 2001

Filed:

Jan 19, 1999

Appl. No.:

9/233612

Inventors:

Arthur Joseph Varady - Chelsea MI
John Michael Kacewicz - Riverview MI
Robert Joseph Dalbo - Allen Park MI
Sheran Anthony Alles - Westland MI
Thomas J. Hermann - Troy MI

Assignee:

Ford Global Technologies, Inc. - Dearborn MI

International Classification:

G01B 730

US Classification:

32420725

Abstract:

A method for more accurately sensing the rotational position of a shaft having a toothed sensor wheel with a missing tooth is disclosed. The method includes employing an inductive sensor to produce a signal in response to the passing of the teeth on the sensor wheel. The sensor signal is altered by the geometry of the wheel about a gap formed by the missing tooth in order to correct for residual stored energy in the sensor at this location, and thus correct the signal for the timing measured by a processor in communication with the sensor.

US Patent:

20200094842, Mar 26, 2020

Filed:

Sep 26, 2018

Appl. No.:

16/142502

Inventors:

Jaeyeong Chang - Ann Arbor MI, US
Richard K. Moote - Ann Arbor MI, US
Arthur J. Varady - Chelsea MI, US
Zhe Wang - Farmington Hills MI, US
Yan Zhang - Auburn Hills MI, US

International Classification:

B60W 30/20
B60W 20/17
F16F 15/00

Abstract:

A misfire detection system and method for a vehicle utilize a controller to obtain a crankshaft speed signal indicative of a rotational speed of an engine crankshaft connected to a device that mitigates vibrational disturbances at the crankshaft caused by misfires of the engine, detect that a first firing event of the engine is a first misfire based on the crankshaft speed signal, monitor a vibrational response of the crankshaft, detect that a consecutive second firing event of the engine is a second misfire based on a first modified crankshaft speed signal and the first set of thresholds, and in response to detecting the second misfire, reset the monitoring of the vibrational response of the crankshaft including modifying the amplitude of the crankshaft speed signal to obtain a second modified crankshaft speed signal and comparing the second modified crankshaft speed signal to a set of thresholds.