Patents by Inventor Tomohiro Tsujimura
Tomohiro Tsujimura 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: 8888656Abstract: A shift mistake detection apparatus detects an operation value of an accelerator pedal in a vehicle and a shift range selected by a shift operation of a driver of the vehicle (e.g. reverse, drive, park). The apparatus detects a shift mistake operation when (i) the shift range selected by the shift operation is in a reverse range and the vehicle begins to travel in reverse according to an operation of the accelerator pedal, and (ii) a steep step operation and a steep return operation of the accelerator pedal is detected. The steep step and return operations of the accelerator pedal have an operation value that is greater than or equal to a normal operation value, where the normal operation value may be a value detected when a driver of a vehicle intentionally travels in reverse (i.e., there is no shift mistake).Type: GrantFiled: June 22, 2012Date of Patent: November 18, 2014Assignee: Denso CorporationInventors: Yasuyuki Kawamura, Tomohiro Tsujimura
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Publication number: 20120329605Abstract: A shift mistake detection apparatus detects an operation value of an accelerator pedal in a vehicle and a shift range selected by a shift operation of a driver of the vehicle (e.g. reverse, drive, park). The apparatus detects a shift mistake operation when (i) the shift range selected by the shift operation is in a reverse range and the vehicle begins to travel in reverse according to an operation of the accelerator pedal, and (ii) a steep step operation and a steep return operation of the accelerator pedal is detected. The steep step and return operations of the accelerator pedal have an operation value that is greater than or equal to a normal operation value, where the normal operation value may be a value detected when a driver of a vehicle intentionally travels in reverse (i.e., there is no shift mistake).Type: ApplicationFiled: June 22, 2012Publication date: December 27, 2012Applicant: DENSO CORPORATONInventors: Yasuyuki KAWAMURA, Tomohiro TSUJIMURA
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Publication number: 20120322617Abstract: A reverse speed control apparatus for controlling a reverse speed of the vehicle may include a brake operation detection unit, a shift range detection unit, and a reverse speed restriction unit. The brake operation detection unit detects a brake operation and a brake release of brakes disposed in the vehicle, and the shift range detection unit detects a shift range of the vehicle. Based on the brake operation detection unit and the shift range detection unit, the reverse speed restriction unit performs a restriction on a reverse speed of the vehicle in accordance with a restriction speed threshold. Specifically, when a brake operation is detected and the shift range of the vehicle is in a reverse range, the reverse speed restriction unit performs the restriction on the reverse speed of the vehicle for a preset period of time when a brake release is detected.Type: ApplicationFiled: June 20, 2012Publication date: December 20, 2012Applicant: DENSO CORPORATIONInventors: Akihiro Takahashi, Tomohiro Tsujimura
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Patent number: 7895824Abstract: A secondary air supply system includes a supply passage, a valve, and a detecting unit. Secondary air is supplied to the upstream of a purification apparatus in an exhaust passage of an engine through the supply passage. The valve communicates and blocks the supply passage to be in open and close conditions. The detecting unit detects a detection object of secondary air in the upstream of the valve in the supply passage. A diagnosis apparatus for the secondary air supply system includes a diagnosis unit that obtains a detection result of the detecting unit in each of the open and close conditions of the valve for evaluating an abnormity of the secondary air supply system in accordance with the detection result. The diagnosis apparatus includes a reliability maintaining unit that determines the diagnosis operation of the diagnosis unit to be valid when the detecting operations in the open and close conditions are continuously performed.Type: GrantFiled: April 24, 2008Date of Patent: March 1, 2011Assignee: Denso CorporationInventors: Tomohiro Tsujimura, Shujiro Morinaga, Satoshi Kodo
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Patent number: 7448202Abstract: A secondary air supply system includes a supply passage, a valve, and a detecting unit. Secondary air is supplied to the upstream of a purification apparatus in an exhaust passage of an engine through the supply passage. The valve communicates and blocks the supply passage to be in open and close conditions. The detecting unit detects a detection object of secondary air in the upstream of the valve in the supply passage. A diagnosis apparatus for the secondary air supply system includes a diagnosis unit that obtains a detection result of the detecting unit in each of the open and close conditions of the valve for evaluating an abnormity of the secondary air supply system in accordance with the detection result. The diagnosis apparatus includes a reliability maintaining unit that determines the diagnosis operation of the diagnosis unit to be valid when the detecting operations in the open and close conditions are continuously performed.Type: GrantFiled: April 4, 2006Date of Patent: November 11, 2008Assignee: DENSO CorporationInventors: Tomohiro Tsujimura, Shujiro Morinaga, Satoshi Kodo
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Publication number: 20080202223Abstract: A secondary air supply system includes a supply passage, a valve, and a detecting unit. Secondary air is supplied to the upstream of a purification apparatus in an exhaust passage of an engine through the supply passage. The valve communicates and blocks the supply passage to be in open and close conditions. The detecting unit detects a detection object of secondary air in the upstream of the valve in the supply passage. A diagnosis apparatus for the secondary air supply system includes a diagnosis unit that obtains a detection result of the detecting unit in each of the open and close conditions of the valve for evaluating an abnormity of the secondary air supply system in accordance with the detection result. The diagnosis apparatus includes a reliability maintaining unit that determines the diagnosis operation of the diagnosis unit to be valid when the detecting operations in the open and close conditions are continuously performed.Type: ApplicationFiled: April 24, 2008Publication date: August 28, 2008Applicant: DENSO CORPORATIONInventors: Tomohiro Tsujimura, Shujiro Morinaga, Satoshi Kodo
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Publication number: 20070208484Abstract: An object of the invention is to provide a vehicle automatic running control system, according to which the vehicle automatic control operation is carried out as long as possible, even when the vehicle is running on a punishing road. For that purpose, the system of the invention determines a degree of concavity and convexity of a road surface and prohibits the automatic running control operation when the degree of concavity and convexity of the road surface is larger than a predetermined value.Type: ApplicationFiled: February 27, 2007Publication date: September 6, 2007Applicant: DENSO CORPORATIONInventors: Tomohiro Tsujimura, Ikurou Hasimoto
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Patent number: 7243532Abstract: Air fuel ratios of exhaust gases of respective cylinders are estimated based on a detection value of an air fuel ratio sensor mounted in an exhaust-collector. Normal combustion and misfire are determined depending upon whether individual cylinder air fuel ratios of the respective cylinders are within a normal combustion range. Then, whether a fuel system causes misfire is determined based on a difference between an actual injection quantity of the misfire cylinder and an average value of actual injection quantities of all the cylinders. Whether an air system causes misfire is determined based on a difference between an estimated air quantity of the misfire cylinder and an average value of actual air quantities of all the cylinders.Type: GrantFiled: December 2, 2004Date of Patent: July 17, 2007Assignee: DENSO CorporationInventors: Tomohiro Tsujimura, Noriaki Ikemoto
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Publication number: 20060218901Abstract: A secondary air supply system includes a supply passage, a valve, and a detecting unit. Secondary air is supplied to the upstream of a purification apparatus in an exhaust passage of an engine through the supply passage. The valve communicates and blocks the supply passage to be in open and close conditions. The detecting unit detects a detection object of secondary air in the upstream of the valve in the supply passage. A diagnosis apparatus for the secondary air supply system includes a diagnosis unit that obtains a detection result of the detecting unit in each of the open and close conditions of the valve for evaluating an abnormity of the secondary air supply system in accordance with the detection result. The diagnosis apparatus includes a reliability maintaining unit that determines the diagnosis operation of the diagnosis unit to be valid when the detecting operations in the open and close conditions are continuously performed.Type: ApplicationFiled: April 4, 2006Publication date: October 5, 2006Applicant: DENSO CORPORATIONInventors: Tomohiro Tsujimura, Shujiro Morinaga, Satoshi Kodo
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Publication number: 20050120786Abstract: Air fuel ratios of exhaust gases of respective cylinders are estimated based on a detection value of an air fuel ratio sensor mounted in an exhaust-collector. Normal combustion and misfire are determined depending upon whether individual cylinder air fuel ratios of the respective cylinders are within a normal combustion range. Then, whether a fuel system causes misfire is determined based on a difference between an actual injection quantity of the misfire cylinder and an average value of actual injection quantities of all the cylinders. Whether an air system causes misfire is determined based on a difference between an estimated air quantity of the misfire cylinder and an average value of actual air quantities of all the cylinders.Type: ApplicationFiled: December 2, 2004Publication date: June 9, 2005Applicant: DENSO CORPORATIONInventors: Tomohiro Tsujimura, Noriaki Ikemoto
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Patent number: 6877468Abstract: A valve timing control apparatus for an internal combustion engine is provided which is designed to ensure the drivability of the engine in the event of failure in operation of a variable valve timing control system made up of intake and exhaust side variable valve timing control mechanisms. If one of intake and exhaust side variable valve timing control mechanism has failed, the control apparatus actuates the other variable valve timing control mechanism to control the timing of opening and closing of a corresponding one of intake and exhaust valves so as to decrease an amount of overlap between the opening and closing of the intake and exhaust valves.Type: GrantFiled: January 13, 2003Date of Patent: April 12, 2005Assignee: Denso CorporationInventors: Tomohiro Tsujimura, Yasuo Hirata, Hideyuki Maeji
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Publication number: 20030131814Abstract: A valve timing control apparatus for an internal combustion engine is provided which is designed to ensure the drivability of the engine in the event of failure in operation of a variable valve timing control system made up of intake and exhaust side variable valve timing control mechanisms. If one of intake and exhaust side variable valve timing control mechanism has failed, the control apparatus actuates the other variable valve timing control mechanism to control the timing of opening and closing of a corresponding one of intake and exhaust valves so as to decrease an amount of overlap between the opening and closing of the intake and exhaust valves.Type: ApplicationFiled: January 13, 2003Publication date: July 17, 2003Inventors: Tomohiro Tsujimura, Yasuo Hirata, Hideyuki Maeji