Bridgestone Sports Co., Ltd.

Mitsubishi Jidosha Kogyo Kabushiki Kaisha

Bridgestone Corporation

Mitsubishi Jidosha Kogyo Kabushtkt Kaisha

Hideo Matsunaga

Makoto Kubota

Hiroshi Takahashi

Fumiaki Sato

Hitoshi Kamura

Masaomi Hiruta

Katsuhiro Furuta

Wataru Ban

Kozue Wada

Hideo Shimazaki

Junya Kitada

Kyosuke Uematsu

Hisakazu Ikedaya

Satoshi Maeda

Hirotada Iwade

Koji Takao

Yasunori Imamoto

Takashi Saito

Atsuo Tateno

Takuya Ohshima

Takuichi Shimizu

Yoshikazu Senno

Yuji Sato

Hisashi Yamagishi

Kenji Saito

Toshiyuki Miyata

Daisuke Kondo

Masafumi Nishitani

Vinh-Duy Thai Nguyen

Takahiro Tsutsui

Atsushi Wakamatsu

Daisuke Mikame

David L Walker

Yasushi Ichikawa

Koetsu Fujiwara

Teruaki Seki

Masashi Nishitani

Shoya Tano

Kenta Imaoka

Noriaki Kinoshita

Kazumichi Takahashi

A control unit diagnoses a failure of a fuel storage unit that seals a fuel tank and a processing unit that processes fuel evaporative gas in the fuel tank. A first pressure detection unit of the fuel storage unit detects the pressure of the fuel tank. A second pressure detection unit of the fuel storage unit is disposed at a position different from the first pressure detection unit, and detects the pressure of the fuel tank. The control unit specifies a failure portion of the fuel storage unit and the processing unit based on a change in either one or both of a first pressure value detected by the first pressure detection unit and a second pressure value detected by the second pressure detection unit when the pressure of the fuel tank is changed.

Fuel tank system

In a fuel tank system, a control unit diagnoses a failure of a fuel storage unit and a processing unit. The fuel storage unit includes a vapor passage through which a fuel tank and a sealing valve are communicated with each other, a first pressure detection unit, and a second pressure detection unit disposed at a position different from the first pressure detection unit. The control unit specifies a presence or an absence of a clogging of the vapor passage based on a first pressure value detected by the first pressure detection unit and a second pressure value detected by the second pressure detection unit when the pressure in the fuel tank is changed by the pressure generation unit in a condition that the sealing valve is controlled to be opened.

A fuel tank system includes a fuel storage unit, a processing unit, and a control unit. The control unit performs a first failure diagnosis of diagnosing a failure of the fuel storage unit in a state where the sealing valve is closed. When the control unit diagnoses that the fuel storage unit is normal, the control unit performs a second failure diagnosis of diagnosing a failure of a purge valve and a bypass valve by causing a pressure generation unit to generate pressure in a state where the sealing valve is closed. When there is a possibility that the purge valve and the bypass valve are in closed-sticking, the control unit performs a third failure diagnosis of specifying a failure in any one of closed-sticking of the purge valve and closed-sticking of the bypass valve by opening the sealing valve.

Vehicle

A controller has a leak determiner determining the presence or absence of an evaporative gas leak in a fuel evaporative gas emission suppressing device, based on a first pressure which is the pressure of a canister when a first predetermined period has elapsed in a state where a first opening/closing section and a second opening/closing section are closed, a third opening/closing section is opened, a fourth opening/closing section is closed, and a pressure generating section is operated; and a second pressure which is the pressure within the canister when, after a lapse of the first predetermined period, a second predetermined period has elapsed in a state where the third opening/closing section is closed.

Fuel evaporative gas emission suppressing device

In a hybrid vehicle that selects a series mode in which an engine drives a motor generator to generate electric power and a driving motor drives drive wheels, the series mode is suspended to temporarily stop fuel supply to the engine, and the motor generator forcedly drives the engine using electric power supplied from a driving battery to perform motoring, and failure determination of the O2 sensors is performed based on oxygen concentrations of an exhaust gas from the engine detected by a front O2 sensor and a rear O2 sensor when the fuel supply to the engine is stopped and when the fuel supply is restarted after finish of the motoring.

Failure determination device for hybrid vehicle

Control apparatus for an engine includes a failure determination unit which determines whether there is a failure in an operating engine, and an A/F (air-fuel ratio) feedback control unit which performs feedback control to bring actual A/F in the engine to a target set in advance. The failure determination unit includes a failure determination section, a failure code storing section, a similar operating condition recording section, and a return-to-normal control section. The A/F feedback control unit includes an A/F target setting section, and the target set is stored in the similar operating condition recording section as a factor defining the operating condition of the engine. The return-to-normal control section eliminates the failure code if the failure determination section does not determine that there is a failure when the engine is operating in an operating condition similar to that recorded in the similar operating condition recording section.

Control apparatus for engine

A diagnostic device incorporates a processor and a memory and diagnoses a failure related to a fuel injection system for an engine whose air-fuel ratio of is feedback-controlled. The diagnostic device includes a calculation unit which calculates a corrected value of a fuel injection amount according to a difference between a target value and a measured value of the air-fuel ratio. The diagnostic device includes a setting unit which sets a mask period in which a failure diagnosis is suspended, according to the corrected value upon switchover of a fuel injection mode. The diagnostic device includes a diagnostic unit which does not carry out the diagnosis in the mask period and carries out the diagnosis outside the mask period.

Diagnostic device

A failure detection apparatus for fuel systems of an engine includes a first failure determiner executing, while the engine is in each of a first injection form and a second injection form, a failure determination process on the corresponding fuel system, a second failure determiner executing, when the first failure determiner determines occurrence of a failure in one of the injection forms, a failure determination process on the fuel system corresponding to the other injection form, a failure locator determining whether or not the failure has occurred, for each of the fuel systems responsible for the first and second injection forms, based on a result by the second failure determiner, and a purge process prohibiter prohibiting execution of a purge process for the engine. The second failure determiner causes the purge process prohibiter to prohibit execution of the purge process, when executing the failure determination process on the fuel system.

Failure detection apparatus for fuel systems of engine

A failure determination apparatus for an oxygen concentration sensor disposed downstream of a catalyst provided in an exhaust system is provided for detecting a failure in the oxygen concentration sensor. The failure determination apparatus comprises: a failure determination device for determining a failure in the oxygen concentration sensor based on the length of a period when the output of the oxygen concentration sensor passes through a predetermined output section during enrichment control after a fuel cut mode of the internal combustion engine is released; a rich fuel supply amount calculation device for calculating the time average of an enriching fuel supply amount, relative to a fuel supply amount necessary for stoichiometric combustion, based on an actual fuel supply amount during the enrichment control; and a failure determination restriction device for restricting failure determination of the failure determination device based on the time average of the enriching fuel supply amount.

Failure determination apparatus for oxygen concentration sensor

After an engine is started, pump monitoring is performed as follows: a canister is opened to the atmosphere; a negative pressure pump is activated; and abnormality of the negative pressure pump is evaluated on the basis of canister pressure Pc detected with a pressure sensor in an evaporative leakage check module, and after the pump monitoring is completed, a switching valve is closed so that the negative pressure pump communicates with the canister for purge any fuel evaporative gas into an intake passage of the engine, and whether or not leakage has occurred in a fuel evaporative gas emission suppressor is evaluated based on the canister pressure Pc.

Fuel evaporative gas emission suppressor

An apparatus includes a dynamo-electric machine driving an engine, and a calculator calculating an increment in a crank angular acceleration of the engine every certain period from a base time after the driving of the engine by the dynamo-electric machine. The apparatus further includes a determiner determining that the engine has started by the dynamo-electric machine on a condition that the increment calculated by the calculator exceeds a standard value.

Engine start determining apparatus

A deterioration determination unit determines whether a catalyst in an exhaust passage of an engine is deteriorated; a first determination unit determines whether there is an air-fuel ratio variation among cylinders of the engine on the basis of distortion in waveform of the air-fuel ratio on the upstream side of the catalyst; and a second determination unit determines whether there is an air-fuel ratio variation among the cylinders on the basis that the air-fuel ratio on the downstream side of the catalyst remains on the lean side. A determination mode switching unit makes the first determination unit execute a determination process concurrently with determination by the deterioration determination unit, and it is determined by the determination process that there is an air-fuel ratio variation among the cylinders, makes the second determination unit execute a determination process in priority to determination of deterioration of the catalyst.

Failure detection device of internal combustion engine

Provided is a golf swing classification method that is capable of optimizing selection of a golf club. A golf swing classification method when a golf club hits a golf ball according to the present invention includes the steps of: acquiring acceleration in at least a single point on the golf club or in at least one point that follows the single point during the golf swing; and mapping a behavior of the golf club based on a time period from a time point when an absolute value of the acceleration is at a maximum to a time point when the golf club hits the golf ball.

Golf swing classification method, golf club selection method, golf swing classification device, and golf swing classification system

When a leak test for a purge pipe and a vapor pipe as targets is executed, a sealing valve that is being closed is opened while an open state of a bypass valve is kept prior to the execution of the leak test, fuel evaporative gas in a fuel tank is caused to flow out to a canister side to reduce a tank internal pressure Ptan to a valve opening guarantee determination value P0, and after the bypass valve is closed subsequently, the leak test is started.

Fuel evaporative gas emission control apparatus

Growing community of inventors

Chichibu, Japan

Hideo Matsunaga