Patents by Inventor Ryuji Choshi
Ryuji Choshi 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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Patent number: 6691588Abstract: In a shifting device which changes the gear ratio of a synchromesh-type transmission by using an electrically operated or controlled actuator, the actuator is controlled to stabilize or equalize the time durations required for effecting respective synchronizations. A driving signal for each of the synchronization controls is decided in accordance with a relationship between the driving signal to be applied to the actuator and a relative rotation number between an idle gear and a sleeve when the synchronization control is initiated. Prior to each synchronization control, the above relation is corrected based on four variables obtained at the latest synchronization control, including (i) an input rotation number deviation summation &Sgr;&Dgr;Nin, (ii) a synchronization time duration deviation &Dgr;TSYN, (iii) an elapse-time input rotation number deviation &Dgr;dNinP, and (iv) a change grade deviation &Dgr;dNin.Type: GrantFiled: October 12, 2001Date of Patent: February 17, 2004Assignee: Aisin AI Co., Ltd.Inventors: Takeshige Miyazaki, Ryuji Choshi, Yoshiyuki Aoyama, Mitsutoshi Kamiya, Yoshihiro Ichikawa
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Patent number: 6655227Abstract: A synchromesh-type transmission includes a shift and select shaft axially movable for carrying out a select operation and rotatable for carrying out a shift operation, a plurality of shift fork shafts each provided with a pair of shift heads, and an inner lever fixed to the shift and select shaft. The inner lever is disposed between the pair of shift heads according to the axial moving operation of the shift and select shaft and comes in contact with one of the shift heads according to the rotational moving operation of the shift and select shaft, wherein a shift stage is performed. The inner lever is located at a neutral position according to the rotational operation of the shift and select shaft for the shift operation, wherein no shift stage is performed.Type: GrantFiled: October 31, 2001Date of Patent: December 2, 2003Assignee: Aisin AI Co., Ltd.Inventors: Yoshiyuki Aoyama, Takeshige Miyazaki, Ryuji Choshi, Mitsutoshi Kamiya, Yoshihiro Ichikawa
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Patent number: 6631318Abstract: A transmission system, including a synchromesh-type transmission, includes an input shaft, a counter gear, an output shaft, an idle gear, a sleeve, a synchromesh mechanism for selecting a predetermined speed-change in response to a synchronizing operation of the sleeve and the idle gear, and a shift actuator for activating the sleeve depending on a shift operation. The transmission system further includes a detecting device for detecting a rotational number changing ratio of the input shaft when a synchronizing operation is performed in accordance with an engaging operation of the sleeve and the idle gear, a controlling device for controlling an operation of the shift actuator depending on an indication from the detecting device, and a converting device for converting an output indicating value to the shift actuator based on characteristics of the shift actuator.Type: GrantFiled: September 28, 2001Date of Patent: October 7, 2003Assignee: Aisin AI Co., Ltd.Inventors: Mitsutoshi Kamiya, Yoshiyuki Aoyama, Takeshige Miyazaki, Ryuji Choshi, Yoshihiro Ichikawa
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Patent number: 6591704Abstract: A shift actuating control system for a synchromesh-type automatic transmission includes a shift actuator having a driving portion activated depending on a shift operation, a shift fork shaft moving a sleeve of a synchromesh mechanism in an axial direction when engaged with the shift fork, and a driving force transmitting member disposed between the driving portion and the shift fork shaft to transmit the driving force generated by the driving portion to the shift fork shaft. The shift actuating control system for the synchromesh-type automatic transmission further includes a detector which detects the deflection of the driving force transmitting member when the driving portion is activated, and a controller which controls the driving portion depending on the deflection detected by the first detector.Type: GrantFiled: October 2, 2001Date of Patent: July 15, 2003Assignee: Aisin Ai Co., Ltd.Inventors: Mitsutoshi Kamiya, Takeshige Miyazaki, Yoshiyuki Aoyama, Yoshihiro Ichikawa, Ryuji Choshi
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Patent number: 6581488Abstract: A control device for a actuator applied in a transmission includes a maximum electric current value detecting device that detects a maximum electric current value supplied to the actuator. The maximum electric current value detecting device includes a determining unit, an electric current supplying unit, a detecting unit, and a setting unit. The determining unit determines a target electric current value supplied to the actuator, the electric current supplying unit supplies electric current to the actuator on the basis of the target electric current value determined by the determining unit, the detecting unit detects the maximum electric current value actually supplied to the actuator independently of the target electric current value determined by the determining unit, and the setting unit sets the maximum electric current value supplied to the actuator on the basis of the maximum electric current value detected by the detecting unit.Type: GrantFiled: August 31, 2001Date of Patent: June 24, 2003Assignee: Aisin AI Co., Ltd.Inventors: Takeshige Miyazaki, Ryuji Choshi, Yoshiyuki Aoyama, Mitsutoshi Kamiya, Yoshihiro Ichikawa
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Patent number: 6578442Abstract: A gear shifting control device for varying a gear ratio of a synchromesh transmission which controls an actuator to agree with an actual value of sleeve load in an axial direction with a required value with higher accuracy at a synchronizer of the transmission. A continuously varying driving signal with time is supplied to the actuator when necessary to change the actual value of the sleeve load to the required value different from the current value. A reaching time of the driving signal reaching the value corresponding to the required value to the actuator is determined based on an initial speed which is a speed of the sleeve at start of supplying the driving signal and a vibration cycle when the sleeve load is vibrated in response to the supply of a step signal to the actuator.Type: GrantFiled: August 7, 2001Date of Patent: June 17, 2003Assignee: Aisin AI Co., Ltd.Inventors: Yoshiyuki Aoyama, Mitsutoshi Kamiya, Takeshige Miyazaki, Ryuji Choshi, Yoshihiro Ichikawa
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Patent number: 6561051Abstract: A gear shifting control device for synchromesh transmission judges whether a gear clash is generated during gear shifting based on gear shifting progress information. If gear clashes occur more frequently than a reference value during a particular shifting mode, then the control device may thereafter skip that shifting mode, if certain conditions are met. The vehicle operator is warned of this event.Type: GrantFiled: August 29, 2001Date of Patent: May 13, 2003Assignee: Aisin Ai Co., Ltd.Inventors: Takeshige Miyazaki, Ryuji Choshi, Yoshiyuki Aoyama, Mitsutoshi Kamiya, Yoshihiro Ichikawa
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Publication number: 20020050182Abstract: A synchromesh-type transmission includes a shift and select shaft axially movable for carrying out a select operation and rotatable for carrying out a shift operation, a plurality of shift fork shafts each provided with a pair of shift heads, and an inner lever fixed to the shift and select shaft. The inner lever is disposed between the pair of shift heads according to the axial moving operation of the shift and select shaft and comes in contact with one of the shift heads according to the rotational moving operation of the shift and select shaft, wherein a shift stage is performed. The inner lever is located at a neutral position according to the rotational operation of the shift and select shaft for the shift operation, wherein no shift stage is performed.Type: ApplicationFiled: October 31, 2001Publication date: May 2, 2002Inventors: Yoshiyuki Aoyama, Takeshige Miyazaki, Ryuji Choshi, Mitsutoshi Kamiya, Yoshihiro Ichikawa
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Publication number: 20020043119Abstract: In a shifting device which changes the gear ratio of a synchromesh-type transmission by using an electrically operated or controlled actuator, the actuator is controlled to stabilize or equalize the time durations required for effecting respective synchronizations. A driving signal for each of the synchronization controls is decided in accordance with a relationship between the driving signal to be applied to the actuator and a relative rotation number between an idle gear and a sleeve when the synchronization control is initiated. Prior to each synchronization control, the above relation is corrected based on four variables obtained at the latest synchronization control, including (i) an input rotation number deviation summation &Sgr;&Dgr;Nin, (ii) a synchronization time duration deviation &Dgr;TSYN, (iii) an elapse-time input rotation number deviation &Dgr;dNinP, and (iv) a change grade deviation &Dgr;dNin.Type: ApplicationFiled: October 12, 2001Publication date: April 18, 2002Inventors: Takeshige Miyazaki, Ryuji Choshi, Yoshiyuki Aoyama, Mitsutoshi Kamiya, Yoshihiro Ichikawa
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Publication number: 20020040267Abstract: A transmission system, including a synchromesh-type transmission, includes an input shaft, a counter gear, an output shaft, an idle gear, a sleeve, a synchromesh mechanism for selecting a predetermined speed-change in response to a synchronizing operation of the sleeve and the idle gear, and a shift actuator for activating the sleeve depending on a shift operation. The transmission system further includes a detecting device for detecting a rotational number changing ratio of the input shaft when a synchronizing operation is performed in accordance with an engaging operation of the sleeve and the idle gear, a controlling device for controlling an operation of the shift actuator depending on an indication from the detecting device, and a converting device for converting an output indicating value to the shift actuator based on characteristics of the shift actuator.Type: ApplicationFiled: September 28, 2001Publication date: April 4, 2002Inventors: Mitsutoshi Kamiya, Yoshiyuki Aoyama, Takeshige Miyazaki, Ryuji Choshi, Yoshihiro Ichikawa
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Publication number: 20020038574Abstract: A shift actuating control system for a synchromesh-type automatic transmission includes a shift actuator having a driving portion activated depending on a shift operation, a shift fork shaft moving a sleeve of a synchromesh mechanism in an axial direction when engaged with the shift fork, and a driving force transmitting member disposed between the driving portion and the shift fork shaft to transmit the driving force generated by the driving portion to the shift fork shaft. The shift actuating control system for the synchromesh-type automatic transmission further includes a detector which detects the deflection of the driving force transmitting member when the driving portion is activated, and a controller which controls the driving portion depending on the deflection detected by the first detector.Type: ApplicationFiled: October 2, 2001Publication date: April 4, 2002Inventors: Mitsutoshi Kamiya, Takeshige Miyazaki, Yoshiyuki Aoyama, Yoshihiro Ichikawa, Ryuji Choshi
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Publication number: 20020023510Abstract: A control device for a actuator applied in a transmission includes a maximum electric current value detecting device that detects a maximum electric current value supplied to the actuator. The maximum electric current value detecting device includes a determining unit, an electric current supplying unit, a detecting unit, and a setting unit. The determining unit determines a target electric current value supplied to the actuator, the electric current supplying unit supplies electric current to the actuator on the basis of the target electric current value determined by the determining unit, the detecting unit detects the maximum electric current value actually supplied to the actuator independently of the target electric current value determined by the determining unit, and the setting unit sets the maximum electric current value supplied to the actuator on the basis of the maximum electric current value detected by the detecting unit.Type: ApplicationFiled: August 31, 2001Publication date: February 28, 2002Inventors: Takeshige Miyazaki, Ryuji Choshi, Yoshiyuki Aoyama, Mitsutoshi Kamiya, Yoshihiro Ichikawa
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Publication number: 20020023511Abstract: A gear shifting control device for synchromesh transmission judges whether a gear clash is generated during gear shifting based on gear shifting progress information. If gear clashes occur more frequently than a reference value during a particular shifting mode, then the control device may thereafter skip that shifting mode, if certain conditions are met. The vehicle operator is warned of this event.Type: ApplicationFiled: August 29, 2001Publication date: February 28, 2002Inventors: Takeshige Miyazaki, Ryuji Choshi, Yoshiyuki Aoyama, Mitsutoshi Kamiya, Yoshihiro Ichikawa
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Publication number: 20020020235Abstract: A gear shifting control device for varying a gear ratio of a synchromesh transmission which controls an actuator to agree with an actual value of sleeve load in an axial direction with a required value with higher accuracy at a synchronizer of the transmission. A continuously varying driving signal with time is supplied to the actuator when necessary to change the actual value of the sleeve load to the required value different from the current value. A reaching time of the driving signal reaching the value corresponding to the required value to the actuator is determined based on an initial speed which is a speed of the sleeve at start of supplying the driving signal and a vibration cycle when the sleeve load is vibrated in response to the supply of a step signal to the actuator.Type: ApplicationFiled: August 7, 2001Publication date: February 21, 2002Inventors: Yoshiyuki Aoyama, Mitsutoshi Kamiya, Takeshige Miyazaki, Ryuji Choshi, Yoshihiro Ichikawa