David Charles Clemens

US Patent:

7182072, Feb 27, 2007

Filed:

Sep 9, 2005

Appl. No.:

11/223306

Inventors:

David Clemens - Canton MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F02M 33/02
F02M 33/04

US Classification:

123520, 123519

Abstract:

A system and method for controlling the introduction of purge fuel vapor into a multi-cylinder internal combustion engine is provided. According to one aspect of the disclosure, a schedule for opening and closing an on-off, pulse-width-modulated, purge control valve is predetermined, and the purge control valve is opened and closed according to the predetermined schedule. According to one aspect of the disclosure, a predetermined schedule can include a repeating sequence of on-pulse frequencies.

US Patent:

7809491, Oct 5, 2010

Filed:

May 26, 2009

Appl. No.:

12/471877

Inventors:

David Michael Bevan - Northville MI, US
Kenneth James Miller - Canton MI, US
Douglas Raymond Martin - Canton MI, US
David Allen Clemens - Canton MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

F02M 33/02
F02D 41/26

US Classification:

701103, 701113, 701115, 123520, 123480, 123486

Abstract:

A control scheme is disclosed for performing both an adaption routine and carbon canister purging. In adaption, parameters for estimating air-fuel ratio from flow sensors and actuators are adjusted against an air-fuel ratio under closed-loop control using an EGO sensor. The two processes cannot run simultaneously. In vehicles in which the engine is operating from the time of key on until key off, the adaption occurs shortly after starting and then periodically thereafter. In vehicles in which the engine is turned on and off frequently such as with HEVs, the adaption routine may be run every time the engine is turned on, which is more frequent than necessary and doesn't allow enough time for purging. According to the disclosed control scheme, the time since last adaption and time in adaption is saved when the engine is turned off so that the adaption routine is conducted only when needed.

US Patent:

8560167, Oct 15, 2013

Filed:

Feb 7, 2012

Appl. No.:

13/367635

Inventors:

Robert Roy Jentz - Westland MI, US
David Allen Clemens - Canton MI, US
Ann Irene DeZelia - Milan MI, US
Aed Mohammad Dudar - Canton MI, US
Michael Igor Kluzner - Oak Park MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

G01M 17/00
B62D 5/06
B60R 21/26

US Classification:

701 327, 180441, 280736

Abstract:

A vehicle is provided with a fuel system, a controller, and a diagnostic module with an orifice, a pressure sensor, and a pump, the module connecting the fuel system to atmosphere. The controller measures a reference pressure across the orifice to provide a threshold, isolates the fuel system, and provides a code in response to comparing a series or measured pressures to the threshold. A method for performing an evaporative leak diagnostic is provided. A valve in a diagnostic module is commanded to a vent position. A pump is operated to measure a reference pressure across an orifice to provide a threshold. A valve is commanded to a test position. The pump is operated to place the fuel system in a low pressure state, and a series of pressures in the fuel system is measured. A diagnostic code is provided after comparing the series of pressures to the threshold.

US Patent:

20140019002, Jan 16, 2014

Filed:

Sep 12, 2013

Appl. No.:

14/025349

Inventors:

David Allen Clemens - Canton MI, US
Ann Irene Sipes - Milan MI, US
Aed M. Dudar - Canton MI, US
Michael Igor Kluzner - Oak Park MI, US

Assignee:

Ford Global Technologies, LLC - Dearborn MI

International Classification:

G01M 15/09

US Classification:

701 328

Abstract:

A method is provided for performing an evaporative leak diagnostic for a vehicle. A valve in a diagnostic module is commanded to a vent position. The valve connects a fuel system to atmosphere. A pump in the diagnostic module is operated to measure a reference pressure across an orifice in the diagnostic module to provide a threshold. The valve is commanded to a test position. The pump is operated to place the fuel system in a low pressure state. A series of pressures in the fuel system is measured. A diagnostic code is provided after comparing the series of pressures to the threshold.