Patents by Inventor Kazushi Hosomi
Kazushi Hosomi 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: 6547022Abstract: A vehicle traction control apparatus and method where an amount of pressure change of braking pressure is based on the amount of acceleration slip and the wheel acceleration. When the traction control is being performed and the braking force is being increased, an upper limit pressure increase amount of braking pressure is based on the engine revolution speed, and the estimated braking pressure, so that the calculated value is smaller if the revolution speed or the estimated braking pressure is greater. The upper limit pressure increase amount of braking pressure is corrected so that it is greater if the speed reduction ratio of the transmission is smaller. If the amount of pressure change of requested braking pressure is excessively high, and the amount of increase in braking pressure needs to be limited, the amount of pressure change of braking pressure is limited to the corrected upper limit pressure increase amount.Type: GrantFiled: June 22, 2001Date of Patent: April 15, 2003Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazushi Hosomi, Akira Nagae
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Patent number: 6352318Abstract: A wheel control state display apparatus of the present invention has a vehicle state detector for detecting a state of a vehicle, a traction-braking force controller for adjusting braking force or traction at a plurality of wheels mounted on the vehicle, based on the result of detection of the vehicle state detector, and a control state display for displaying a wheel under adjustment of the braking force or the traction by the traction-braking force controller. The apparatus according to the present invention can present the conditions of the vehicle to the driver in more detail by displaying which wheel is under the adjustment of the traction-braking force.Type: GrantFiled: May 18, 2000Date of Patent: March 5, 2002Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazushi Hosomi, Shinsuke Yamamoto, Akira Nagae
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Publication number: 20010054520Abstract: A vehicle traction control apparatus and method where an amount of pressure change of braking pressure is based on the amount of acceleration slip and the wheel acceleration. When the traction control is being performed and the braking force is being increased, an upper limit pressure increase amount of braking pressure is based on the engine revolution speed, and the estimated braking pressure, so that the calculated value is smaller if the revolution speed or the estimated braking pressure is greater. The upper limit pressure increase amount of braking pressure is corrected so that it is greater if the speed reduction ratio of the transmission is smaller. If the amount of pressure change of requested braking pressure is excessively high, and the amount of increase in braking pressure needs to be limited, the amount of pressure change of braking pressure is limited to the corrected upper limit pressure increase amount.Type: ApplicationFiled: June 22, 2001Publication date: December 27, 2001Applicant: Toyota Jidosha Kabushiki KaishaInventors: Kazushi Hosomi, Akira Nagae
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Patent number: 6301541Abstract: Provided is a braking force control apparatus for vehicles capable of performing appropriate vehicle braking even in a road-contactless state of a wheel. The braking force control apparatus is adapted to a four-wheel drive vehicle having a center differential for distributing and transmitting driving force to the front wheels and rear wheels and a braking system capable of exerting braking force on each of the front and rear wheels, based on voluntary switching between braking according to driver's brake-pedal actuation and forced braking independent of the brake-pedal actuation. It is determined whether the vehicle is in an engine brake state and it is then determined whether at least one of the wheels is in the road-contactless state.Type: GrantFiled: June 1, 2000Date of Patent: October 9, 2001Assignees: Toyota Jidosha Kabushiki Kaisha, Aisin Seiki Kabushiki KaishaInventors: Kazushi Hosomi, Toshimi Ishikawa, Yasuhito Ishida
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Patent number: 6282481Abstract: A driving force control apparatus for vehicles prevents a breakdown of a power train and maintains driving force during running, thereby improving driving performance. The driving force control apparatus is constructed to control the driving force distributed through a differential gear unit to a plurality of wheels. The apparatus is arranged to compute permissible torque that can be permitted to enter the differential gear unit, based on a differential rotational speed of the differential gear unit, compute input torque entered into the differential gear unit, and decrease engine power output so as to keep the input torque into the differential gear unit not more than the permissible torque when the input torque is greater than the permissible torque.Type: GrantFiled: May 31, 2000Date of Patent: August 28, 2001Assignee: Toyota Jidosha Kabushiki KaishaInventor: Kazushi Hosomi
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Patent number: 6269297Abstract: A traction control apparatus for vehicles according to the present invention has a slip state detector for detecting a slip state of a wheel, a parameter determining device for determining a control parameter for generating braking force according to the slip state detected, a control permitting device for permitting traction control, a parameter changer for changing the control parameter so as to decrease the braking force when the control parameter is one to generate the braking force at the wheel over permissible braking force at the start of control, and a traction control for executing the traction control, based on the control parameter. Thus the apparatus can restrain uncomfortableness during the traction control and can prevent large input from entering the power train.Type: GrantFiled: May 26, 2000Date of Patent: July 31, 2001Assignee: Toyota Jidosha Kabushiki KaishaInventors: Kazushi Hosomi, Masashi Takagi, Mitsuyoshi Yokokawa, Yasuhiro Saito
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Patent number: 6183048Abstract: In an automobile having a pair of front wheels and a pair of rear wheels, and a brake system for selectively braking each of the pairs of front and rear wheels, a brake control device comprises a device for detecting a backward movement of the automobile, a device for detecting a predetermined locking condition of at least one of the pair of front wheels, and a device for controlling braking force applied by the brake system to the pair of rear wheels to be stronger than braking force applied by the brake system to the pair of front wheels when the automobile is moving backward with at least one of the pair of front wheels being more locked than the predetermined locking condition.Type: GrantFiled: October 6, 1998Date of Patent: February 6, 2001Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yosuke Takahira, Kazushi Hosomi
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Patent number: 6007454Abstract: In an automobile having a pair of front wheels, a pair of rear wheels, a brake system for selectively braking each of the pairs of front and rear wheels, an engine, a transmission system including a speed change gear device for selectively providing a plurality of transmission gear ratios, a center differential device, a front differential device, and a rear differential device, the traction control device detects slipping conditions of each of the pairs of front and rear wheels, and controls the brake system so as to brake at least one of the pairs of front and rear wheels for execution of traction controls according to one of at least two separate traction control programs which are automatically changed over for execution according to selections of the transmission gear ratios of the speed change gear device for a relatively high speed driving or a relatively low speed driving.Type: GrantFiled: October 14, 1998Date of Patent: December 28, 1999Assignee: Toyota Jidosha Kabushiki KaishaInventors: Yosuke Takahira, Kazushi Hosomi