Patents by Inventor Christopher John Teslak
Christopher John Teslak has filed for patents to protect the following inventions. This listing includes patent applications that are pending as well as patents that have already been granted by the United States Patent and Trademark Office (USPTO).
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Publication number: 20160319758Abstract: Method and systems are provided for adjusting an engine torque in response to changes in a desired engine torque. In one example, a method may comprise responsive to increasing desired engine torques, monotonically decreasing an alternator torque to a first level from a second level when not injecting fuel to engine cylinders, and stepping up the alternator torque from the first level to the second level while initiating engine combustion, and then monotonically decreasing the alternator torque from the second level to the first level in response to the alternator torque reaching the first level. In this way, a method may comprise adjusting a load exerted on an engine by an alternator mechanically coupled to said engine during both cylinder combustion, and during non-fueling conditions.Type: ApplicationFiled: May 1, 2015Publication date: November 3, 2016Inventors: Tobias John Pallett, Christopher John Teslak, Yanan Zhao, Nicholas Dashwood Crisp, Rajit Johri, Jeffrey Allen Doering
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Publication number: 20160114803Abstract: A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated friction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. Measured torque values are used during a torque phase of the upshift to correct an estimated oncoming friction element target torque so that transient torque disturbances at an oncoming clutch are avoided and torque transients at the output shaft are reduced.Type: ApplicationFiled: January 4, 2016Publication date: April 28, 2016Inventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee
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Patent number: 9260102Abstract: A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated friction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. Measured torque values are used during a torque phase of the upshift to correct an estimated oncoming friction element target torque so that transient torque disturbances at an oncoming clutch are avoided and torque transients at the output shaft are reduced.Type: GrantFiled: June 4, 2014Date of Patent: February 16, 2016Assignee: FORD GLOBAL TECHNOLOGIES, LLCInventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee
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Publication number: 20160017996Abstract: A multiple ratio transmission having an input shaft, an output shaft and oncoming clutch and off-going clutch for effecting ratio upshifts is provided. The transmission also includes a transmission controller configured for controlling shifts. During the torque phase of a ratio upshift, the controller increases input torque. Next, the controller estimates an oncoming clutch target torque. The controller controls a torque input to ensure the off-going clutch remains locked. The controller measures an actual transmission value for a torque transmitting element of the transmission and corrects the oncoming clutch target torque using the actual transmission value whereby an increasing torque for the oncoming friction element is achieved with minimal torque transients along the output shaft during the upshift.Type: ApplicationFiled: September 30, 2015Publication date: January 21, 2016Inventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee
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Patent number: 9180857Abstract: A multiple ratio transmission having an input shaft, an output shaft and oncoming clutch and off-going clutch for effecting ratio upshifts is provided. The transmission also includes a transmission controller configured for controlling shifts. During the torque phase of a ratio upshift, the controller increases input torque. Next, the controller estimates an oncoming clutch target torque. The controller controls a torque input to ensure the off-going clutch remains locked. The controller measures an actual transmission value for a torque transmitting element of the transmission and corrects the oncoming clutch target torque using the actual transmission value whereby an increasing torque for the oncoming friction element is achieved with minimal torque transients along the output shaft during the upshift.Type: GrantFiled: January 3, 2014Date of Patent: November 10, 2015Assignee: Ford Global Technologies, LLCInventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee
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Patent number: 9162680Abstract: A method of controlling a transmission and engine during a coasting downshift is particularly suited to transmission arrangements exhibiting strong inertia coupling. During the inertia phase of the downshift, a third clutch such as a torque converter bypass clutch is modulated to control output torque. Simultaneously, engine torque is modulated to control engine speed. The resulting control scheme is only semi-coupled.Type: GrantFiled: June 10, 2014Date of Patent: October 20, 2015Assignee: Ford Global Technologies, LLCInventors: Hongtei Eric Tseng, Christopher John Teslak, Bradley Dean Riedle, Jeffrey Allen Doering, Tobias John Pallett
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Patent number: 8938340Abstract: A system and method for controlling a vehicle powertrain having a transmission to improve shift quality is based on detection of an initial rise time of an on-coming clutch torque capacity, which indicates the start of the torque phase. The initial rise time is detected using a transmission input shaft torque computation. The system may include a vehicle powertrain having an engine, a transmission coupled to the engine via a torque converter and a controller configured to initiate torque phase control when a difference between a first transmission input shaft torque and a second transmission input shaft torque exceeds a first predetermined threshold parameter during a shift event characterized by a preparatory phase, a torque phase and an inertia phase.Type: GrantFiled: March 13, 2013Date of Patent: January 20, 2015Assignee: Ford Global Technologies, LLCInventors: Christopher John Teslak, Yuji Fujii, Seung-Hoon Lee, Bradley Dean Riedle, Michael Glenn Fodor
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Publication number: 20140287872Abstract: A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated friction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. Measured torque values are used during a torque phase of the upshift to correct an estimated oncoming friction element target torque so that transient torque disturbances at an oncoming clutch are avoided and torque transients at the output shaft are reduced.Type: ApplicationFiled: June 4, 2014Publication date: September 25, 2014Applicant: Ford Global Technologies, LLCInventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee
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Publication number: 20140277974Abstract: A system and method for controlling a vehicle powertrain having a transmission to improve shift quality is based on detection of an initial rise time of an on-coming clutch torque capacity, which indicates the start of the torque phase. The initial rise time is detected using a transmission input shaft torque computation. The system may include a vehicle powertrain having an engine, a transmission coupled to the engine via a torque converter and a controller configured to initiate torque phase control when a difference between a first transmission input shaft torque and a second transmission input shaft torque exceeds a first predetermined threshold parameter during a shift event characterized by a preparatory phase, a torque phase and an inertia phase.Type: ApplicationFiled: March 13, 2013Publication date: September 18, 2014Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Christopher John Teslak, Yuji Fujii, Seung-Hoon Lee, Bradley Dean Riedle, Michael Glenn Fodor
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Patent number: 8808141Abstract: A system and method for reducing torque disturbances during a shift event for a hybrid vehicle having an engine selectively coupled to a traction motor and an automatic transmission to control or compensate actual transmission input shaft torque based on measured transmission input torque by controlling a torque source, such as a traction motor. The system and method may include an engine, a transmission, a traction motor between the engine and the transmission with the engine being selectively coupled to the motor and the transmission by a disconnect clutch and a controller configured to control motor torque to cause an actual transmission input shaft torque to achieve a target transmission input shaft torque during a transmission shift event.Type: GrantFiled: March 15, 2013Date of Patent: August 19, 2014Assignee: Ford Global Technologies, LLCInventors: Matthew John Shelton, Christopher John Teslak, Zhengyu Dai
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Patent number: 8788113Abstract: An automotive vehicle may include at least one controller configured to monitor a plurality of parameters representing a driver's dynamic control of the vehicle and to establish a reference range based on values of the monitored parameters during a first time period. The at least one controller may be further configured to detect a change in driver behavior condition when, during a second time period, a parameter derived from the monitored parameters falls outside of the reference range, and in response to detecting the change in driver behavior condition, to alter a response of the vehicle to driver inputs or to generate output representing a recommendation to alter a response of the vehicle to driver inputs.Type: GrantFiled: June 13, 2011Date of Patent: July 22, 2014Assignee: Ford Global Technologies, LLCInventors: Dimitar Petrov Filev, Ilya Vladimir Kolmanovsky, Oleg Yurievitch Gusikhin, Steven Joseph Szwabowski, Perry Robinson MacNeille, Christopher John Teslak, Fazal Urrahman Syed, Fling Tseng
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Patent number: 8775044Abstract: A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated friction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. Measured torque values are used during a torque phase of the upshift to correct an estimated oncoming friction element target torque so that transient torque disturbances at an oncoming clutch are avoided and torque transients at the output shaft are reduced.Type: GrantFiled: June 8, 2011Date of Patent: July 8, 2014Assignee: Ford Global Technologies, LLCInventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung Hoon Lee
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Publication number: 20140121059Abstract: A multiple ratio transmission having an input shaft, an output shaft and oncoming clutch and off-going clutch for effecting ratio upshifts is provided. The transmission also includes a transmission controller configured for controlling shifts. During the torque phase of a ratio upshift, the controller increases input torque. Next, the controller estimates an oncoming clutch target torque. The controller controls a torque input to ensure the off-going clutch remains locked. The controller measures an actual transmission value for a torque transmitting element of the transmission and corrects the oncoming clutch target torque using the actual transmission value whereby an increasing torque for the oncoming friction element is achieved with minimal torque transients along the output shaft during the upshift.Type: ApplicationFiled: January 3, 2014Publication date: May 1, 2014Applicant: Ford Global Technologies, LLCInventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee
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Patent number: 8636613Abstract: A multiple ratio transmission having an input shaft, an output shaft and oncoming clutch and off-going clutch for effecting ratio upshifts is provided. The transmission also includes a transmission controller configured for controlling shifts. During the torque phase of a ratio upshift, the controller increases input torque. Next, the controller estimates an oncoming clutch target torque. The controller controls a torque input to ensure the off-going clutch remains locked. The controller measures an actual transmission value for a torque transmitting element of the transmission and corrects the oncoming clutch target torque using the actual transmission value whereby an increasing torque for the oncoming friction element is achieved with minimal torque transients along the output shaft during the upshift.Type: GrantFiled: December 19, 2011Date of Patent: January 28, 2014Assignee: Ford Global Technologies, LLCInventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee
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Publication number: 20130296127Abstract: A system and method for reducing torque disturbances during a shift event for a hybrid vehicle having an engine selectively coupled to a traction motor and an automatic transmission to control or compensate actual transmission input shaft torque based on measured transmission input torque by controlling a torque source, such as a traction motor. The system and method may include an engine, a transmission, a traction motor between the engine and the transmission with the engine being selectively coupled to the motor and the transmission by a disconnect clutch and a controller configured to control motor torque to cause an actual transmission input shaft torque to achieve a target transmission input shaft torque during a transmission shift event.Type: ApplicationFiled: March 15, 2013Publication date: November 7, 2013Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Matthew John Shelton, Christopher John Teslak, Zhengyu Dai
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Patent number: 8529406Abstract: A speed ratio shaft control for multiple ratio vehicle transmission has controlled release of an off-going transmission clutch and controlled engagement of an on-coming transmission clutch during a speed ratio upshift, at least one clutch being a friction torque establishing clutch. A controller, using shift-timing software strategy, actively manages in real time a clutch torque level for each clutch so that transient torque disturbances in a transmission torque output shaft are mitigated.Type: GrantFiled: November 30, 2012Date of Patent: September 10, 2013Assignee: Ford Global Technologies, LLCInventors: Yujii Fujii, Jahan Asgari, Davorin David Hrovat, Hong Jiang, Gregory Michael Pietron, Bradley Dean Riedle, Christopher John Teslak, Hongtei Eric Tseng
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Patent number: 8529405Abstract: A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated friction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a powertrain source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a powertrain source is modulated. A perceptible transmission output torque reduction during an upshift is avoided.Type: GrantFiled: November 27, 2012Date of Patent: September 10, 2013Assignee: Ford Global Technologies, LLCInventors: Yuji Fujii, Jahan Asgari, Davorin David Hrovat, Hong Jiang, Gregory Michael Pietron, Bradley Dean Riedle, Christopher John Teslak, Hongtei Eric Tseng
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Publication number: 20130153353Abstract: A multiple ratio transmission having an input shaft, an output shaft and oncoming clutch and off-going clutch for effecting ratio upshifts is provided. The transmission also includes a transmission controller configured for controlling shifts. During the torque phase of a ratio upshift, the controller increases input torque. Next, the controller estimates an oncoming clutch target torque. The controller controls a torque input to ensure the off-going clutch remains locked. The controller measures an actual transmission value for a torque transmitting element of the transmission and corrects the oncoming clutch target torque using the actual transmission value whereby an increasing torque for the oncoming friction element is achieved with minimal torque transients along the output shaft during the upshift.Type: ApplicationFiled: December 19, 2011Publication date: June 20, 2013Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee
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Patent number: 8337361Abstract: A speed ratio shaft control for multiple ratio vehicle transmission has controlled release of an off-going transmission clutch and controlled engagement of an on-coming transmission clutch during a speed ratio upshift, at least one clutch being a friction torque establishing clutch. A controller, using shift-timing software strategy, actively manages in real time a clutch torque level for each clutch so that transient torque disturbances in a transmission torque output shaft are mitigated.Type: GrantFiled: August 30, 2010Date of Patent: December 25, 2012Assignee: Ford Global Technologies, LLCInventors: Yuji Fujii, Jahan Asgari, Davorin David Hrovat, Hong Jiang, Gregory Michael Pietron, Bradley Dean Riedle, Christopher John Teslak, Hongtei Eric Tseng
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Publication number: 20120316738Abstract: A control system and method for controlling a multiple gear ratio automatic transmission in a powertrain for an automatic transmission having pressure activated friction torque elements to effect gear ratio upshifts. The friction torque elements are synchronously engaged and released during a torque phase of an upshift event as torque from a torque source is increased while allowing the off-going friction elements to slip, followed by an inertia phase during which torque from a torque source is modulated. A perceptible transmission output torque reduction during an upshift is avoided. Measured torque values are used during a torque phase of the upshift to correct an estimated oncoming friction element target torque so that transient torque disturbances at an oncoming clutch are avoided and torque transients at the output shaft are reduced.Type: ApplicationFiled: June 8, 2011Publication date: December 13, 2012Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Christopher John Teslak, Gregory Michael Pietron, Hongtei Eric Tseng, Yuji Fujii, Michael Glenn Fodor, Diana Yanakiev, Seung-Hoon Lee