Search Patents
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Patent number: 10145470Abstract: A continuously variable transmission (CVT) for use with a torque generating mechanism includes an input member connectable to the torque generating mechanism, an output member, a variator assembly, and a controller. The controller is programmed to control a change-of-mind shift of the CVT requesting a transition from an initially-requested shift to a next-requested shift before completion of the initially-requested shift. Additionally, the controller is programmed to execute a method by detecting the change-of-mind shift, determining an acceleration profile of the input member for the change-of-mind shift using a calibration map indexed by a starting and target ratio of the variator assembly, and calculating a required ratio of the input and output pulleys using the acceleration profile. The controller then commands a clamping pressure of the variator assembly to thereby achieve the calculated required ratio. A vehicle includes an engine and the CVT noted above.Type: GrantFiled: February 9, 2016Date of Patent: December 4, 2018Assignee: GM Global Technology Operations LLCInventors: Zhen J. Zhang, Paul G. Otanez
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Publication number: 20130005532Abstract: Methods and systems are provided for restarting an engine in response to a driver's change-of-mind. In one embodiment, the engine is shutdown during an idle stop with the transmission in a higher gear or with the transmission tied-up to a transmission case. In response to a driver change-of-mind restart request, the transmission is downshifted, or released from the tie-up, to return driveline torque.Type: ApplicationFiled: June 28, 2011Publication date: January 3, 2013Applicant: FORD GLOBAL TECHNOLOGIES, LLCInventors: Alex O'Connor Gibson, Felix Nedorezov, Chad Everette Griffin
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Patent number: 8591379Abstract: Methods and systems are provided for restarting an engine in response to a driver's change-of-mind. In one embodiment, the engine is shutdown during an idle stop with the transmission in a higher gear or with the transmission tied-up to a transmission case. In response to a driver change-of-mind restart request, the transmission is downshifted, or released from the tie-up, to return driveline torque.Type: GrantFiled: June 28, 2011Date of Patent: November 26, 2013Assignee: Ford Global Technologies, LLCInventors: Alex O'Connor Gibson, Felix Nedorezov, Chad Everette Griffin
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Publication number: 20140080669Abstract: Methods and systems are provided for restarting an engine in response to a driver's change-of-mind. In one embodiment, the engine is shutdown during an idle stop with the transmission in a higher gear or with the transmission tied-up to a transmission case. In response to a driver change-of-mind restart request, the transmission is downshifted, or released from the tie-up, to return driveline torque.Type: ApplicationFiled: November 15, 2013Publication date: March 20, 2014Applicant: Ford Global Technologies, LLCInventors: Alex O'Connor Gibson, Felix Nedorezov, Chad Everette Griffin
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Patent number: 9180861Abstract: Methods and systems are provided for restarting an engine in response to a driver's change-of-mind. In one embodiment, the engine is shutdown during an idle stop with the transmission in a higher gear or with the transmission tied-up to a transmission case. In response to a driver change-of-mind restart request, the transmission is downshifted, or released from the tie-up, to return driveline torque.Type: GrantFiled: November 15, 2013Date of Patent: November 10, 2015Assignee: Ford Global Technologies, LLCInventors: Alex O'Connor Gibson, Felix Nedorezov, Chad Everette Griffin
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Patent number: 8944957Abstract: A method of controlling shifts in a multi-speed transmission includes beginning an initial shift, which changes the transmission from a starting gear to an initial target gear, and executing an adjusted shift, which changes the transmission to an adjusted target gear having higher speed ratio than the initial target gear, when transition conditions are satisfied. The transition conditions include a threshold increase in torque request, which is sufficient to require the transmission to be placed into the adjusted target gear. The transition conditions also include a common controlling clutch, which is an off-going clutch to place the transmission in the adjusted target gear. Executing the adjusted shift does not include placing the transmission in a neutral mode. Furthermore, executing the adjusted shift does not include completing the initial shift.Type: GrantFiled: November 10, 2011Date of Patent: February 3, 2015Assignee: GM Global Technology Operations LLCInventors: Harinath Atmaram, William R. Mayhew
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Patent number: 10449964Abstract: Variator (20) and forward clutch (Fwd/C) disposed in series are provided between engine (1) having starter motor (15) and driving wheel (7). Sailing stop control that, on the basis of satisfaction of sailing entering condition, interrupts power transmission by frictional engagement element (Fwd/C), stops engine (1) and performs coast-travel is performed. When sailing entering condition is satisfied, coast-travel is started with rotation stop timing of variator (20) being delayed with respect to rotation stop timing of engine (1). When accelerator pedal depression operation intervenes after start of coast-travel, engine (1) is restarted by starter motor (15). When judged that input and output rotation speeds of frictional engagement element (Fwd/C) become synchronization rotation speed after restart of engine (1), frictional engagement element (Fwd/C) is reengaged.Type: GrantFiled: October 17, 2016Date of Patent: October 22, 2019Assignee: JATCO LTDInventors: Tadashi Iwamoto, Akira Takano, Masayoshi Nakasaki, Yoshimasa Nishihiro, Yukifumi Ootsuka