With Safety Valve Patents (Class 475/133)
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Patent number: 10024421Abstract: A hydraulic pressure control device of a vehicle driving device, the hydraulic pressure control device includes a range switcher having a first signal solenoid valve capable of supplying a first signal pressure and a spool switchable between a first position reached via the first signal pressure and a second position reached via a biasing force of a biasing member.Type: GrantFiled: October 2, 2015Date of Patent: July 17, 2018Assignees: AISIN AW CO., LTD., TOYOTA JIDOSHA KABUSHIKI KAISHAInventors: Kazuyuki Noda, Yoshimitsu Hyodo, Kousuke Tanaka, Aito Ide, Kota Fujii, Atsushi Tabata, Ryuji Ibaraki, Yuji Yasuda, Haruhisa Suzuki, Koichi Okuda
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Patent number: 8403787Abstract: The present invention provides a hydraulic control system of a power train for a hybrid vehicle that allows the power train of a hybrid vehicle to implement all of two or more EV modes, two or more power split modes, and at least three or more fixed-stage modes, with a relatively simple configuration, and achieves satisfactory power performance of the power train and fuel efficiency and reduce the cost of the valve body, remove possibility of malfunction, and implements a limp home function when a controller is broken.Type: GrantFiled: September 14, 2010Date of Patent: March 26, 2013Assignees: Hyundai Motor Company, Kia Motors CorporationInventors: Youngchul Kim, Gwangseob Shin, Jonghyun Kim, Yeonho Kim, Jaeshin Yi
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Patent number: 8306708Abstract: A control device for a vehicular automatic transmission which can realize a shifting with quickened response with suppressing a turbine blow-up during the shifting is provided. When a response in hydraulic pressure control by a hydraulic pressure control circuit 42 fails to satisfy a preset predetermined determining criterion, a shifting response is prevented from improving, in comparison to a case where the determining criterion is satisfied. Under a relatively low response of the hydraulic pressure control by the hydraulic pressure control circuit 42 due to air mixture to working oil, a control to inhibit a high-response shifting or the like is performed, so that a turbine blow-up caused by a delayed response of hydraulic pressure can be prevented. Thus, the control device for the vehicular automatic transmission can be provided, which can realize the shifting with quickened response, with suppressing the turbine blow-up during the shifting.Type: GrantFiled: September 2, 2009Date of Patent: November 6, 2012Assignee: Toyota Jidosha Kabushiki KaishaInventors: Keisuke Ota, Hitoshi Matsunaga, Koji Oshima
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Patent number: 8066090Abstract: A hydraulic control apparatus for an automatic transmission includes a forward travel engaging element, a reverse travel engaging element, a first signal electromagnetic valve, a first switching valve, and a second switching valve. The hydraulic control apparatus is structured so as to change the output state of the signal pressure of the first signal electromagnetic valve when changing from the reverse travel shift position and/or shift range to the non-travel shift position and/or shift range and when changing from the forward travel shift position and/or shift range to the non-travel shift position and/or shift range, and to enable quick draining of hydraulic pressure of the hydraulic servo of the reverse travel engaging element and hydraulic pressure of the hydraulic servo of the forward travel engaging element.Type: GrantFiled: December 26, 2007Date of Patent: November 29, 2011Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Tetsuya Shimizu, Kazuyuki Noda, Kazunori Ishikawa, Satoru Kasuya, Tooru Matsubara, Masahiro Kojima, Ryuji Ibaraki, Atsushi Tabata
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Patent number: 7419452Abstract: At the time of a failure in the second group of engagement devices, the manner of input of oil pressures to a fail-safe valve group is changed via a priority degree switching valve on the basis of the state of engagement of engagement devices of the first group in such a manner that the predetermined degrees of priority for the supply of one of oil pressures PC4, PB1 output from linear solenoid valves SL4, SL5 to a corresponding one of a clutch C4 and a brake B1 via the fail-safe valve group are changed so as to avoid an event that the fail-safe gear stage established in order to prevent the occurrence of interlock of the automatic transmission involves a downshift of two or more stages from the speed change stage maintained immediately prior to the occurrence of the failure. Therefore, it is possible to prevent the occurrence of an uncomfortable behavior of the vehicle caused by the shift to the fail-safe gear stage.Type: GrantFiled: July 3, 2006Date of Patent: September 2, 2008Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazutoshi Nozaki, Atsushi Honda, Akiharu Abe, Hirofumi Ota
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Patent number: 6866611Abstract: A judging section judges whether or not ranges detected, respectively, by a first range detection section consisting of a first detection section and a position detecting sensor, and a second range detection section consisting of a second detection section; a C1 detecting sensor and a B1 detecting sensor are in mutual agreement, and when the detected ranges are not in mutual agreement, a failure judging section judges a failure of the first range detection section.Type: GrantFiled: June 26, 2003Date of Patent: March 15, 2005Assignee: Aisin AW Co., Ltd.Inventors: Shigeo Tsuzuki, Jiro Maeda, Naoki Ohkoshi
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Patent number: 6840885Abstract: The powertrain of a six-speed powertrain and a hydraulic control system includes a main shift section of first and second single pinion planetary gearsets, in which a first planet carrier is fixedly connected to a second ring gear. The powertrain also includes a first ring gear fixedly connected to a second planet carrier, and a first sun gear. The second planet carrier, and a second sun gear are variably connected to an input shaft through first, second, and third clutches, respectively. A connecting member connecting the first ring gear and the second planet carrier is variably connected to a housing through a first brake and a first one-way clutch. The second sun gear being variably connected to the housing by a second brake.Type: GrantFiled: December 17, 2002Date of Patent: January 11, 2005Assignee: Hyundai Motor CompanyInventors: Jae-Shin Yi, Jae-Duk Jang
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Patent number: 6364801Abstract: A control system for an automatic transmission comprises a forward/reverse selection hydraulic servomechanism 70, a D inhibitor valve, which controls the supply of a line pressure to the servo-oil chambers of this servomechanism, and a plurality of solenoid valves 81˜85, which are used for controlling the actuation of the shift valves and the D inhibitor valve. This control system comprises a first neutral mode and a second neutral mode for a neutral range. In the first neutral mode, the D inhibitor valve is switched to a forward drive position, and the forward drive servo-oil chamber is connected to a drain. In the second neutral mode, the D inhibitor valve is switched to a reverse drive position, and the forward drive and reverse drive servo-oil chambers are both connected to the drain.Type: GrantFiled: June 8, 2000Date of Patent: April 2, 2002Assignee: Honda Giken Kogyo Kabushiki KaishaInventors: Shoji Asatsuke, Tatsuyuki Ohashi, Hideki Wakamatsu, Takayuki Yamaguchi, Tomonari Shirai
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Patent number: 6120406Abstract: An automatic transmission is provided with failsafe operation via a unique manual valve and multi-select solenoid arrangement. The transmission also provides for an energy saving logic operation mode.Type: GrantFiled: April 1, 1999Date of Patent: September 19, 2000Assignee: DaimlerChrysler CorporationInventors: Charles J. Redlinger, Gerald L. Holbrook
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Patent number: 5984818Abstract: Disclosed is a hydraulic control system for automatic transmissions.Type: GrantFiled: November 18, 1998Date of Patent: November 16, 1999Assignee: Hyundai Motor CompanyInventor: Pyung-Hwan Ryu
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Patent number: 5437204Abstract: A system for directing line pressure alternately to a forward drive circuit and a reverse drive circuit includes three solenoid-operated select valves that direct pressure from a line pressure source to a reverse drive select valve, a forward drive select valve, reverse drive select valve, a range select switch assembly, pressure switches, and two coaxial range control valves. The two drive select valves are interconnected to form a hydraulic latch whose outputs are connected to the range control valve such that either the forward drive friction elements are pressurized, the reverse drive friction elements are pressurized, or none of the friction elements are pressurized.Type: GrantFiled: December 20, 1993Date of Patent: August 1, 1995Assignee: Ford Motor CompanyInventor: Dennis W. Person
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Patent number: 5433124Abstract: A hydraulic latch for directing line pressure alternately to a forward drive circuit and a reverse drive circuit includes three solenoid-operated select valves that direct pressure from a line pressure source to a reverse drive select valve, a forward drive select valve, and two coaxial range control valves. The two drive select valves are interconnected to form a hydraulic latch whose outputs are connected to the range control valve such that either the forward drive friction elements are pressurized, the reverse drive friction elements are pressurized, or none of the friction elements are pressurized.Type: GrantFiled: December 20, 1993Date of Patent: July 18, 1995Assignee: Ford Motor CompanyInventor: Dennis W. Person
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Patent number: 5334114Abstract: A control system is provided for servo hydraulic pressure in a vehicular automatic transmission having planetary gear mechanisms. Shifting elements of the mechanisms can be connected to establish a different power flow in accordance with engagement or release of frictional engagement devices under the control of servo hydraulic pressure to achieve plural speed stages. The system comprises a servo pressure feed line for feeding, even in a non-running range, servo hydraulic pressure to at least one particular device out of plural frictional engagement devices which are caused to simultaneously engage in a reverse range of the transmission, a directional control valve disposed in the line to control feed or drain of the servo hydraulic pressure to or from said particular device through the line, and a solenoid valve for controlling the control valve to prevent the feed of the servo hydraulic pressure at vehicle speeds above a predetermined value.Type: GrantFiled: November 24, 1992Date of Patent: August 2, 1994Assignees: Aisin AW Co., Ltd., Toyota Jidosha Kabushiki KaishaInventors: Masahiko Ando, Koji Noda, Yoshihisa Yamamoto, Masahiro Hayabuchi, Kazumasa Tsukamoto, Yasuo Hojo, Seitoku Kubo, Yutaka Taga, Hidehiro Oba