Honda Motor Co., Ltd.

Sumitomo Rubber Industries Limited

Kazutaka Saito

Kazuo Matsuda

Junichi Nishimura

Etsuya Miyake

Hiromi Aida

Akira Nakamuta

Ichiro Ueno

Satoshi Hiyama

Masahiko Niki

Hiroshi Hashimoto

Yoshinobu Mukai

Minao Yanase

Yoshitaka Suzuki

Yuji Oshiro

Takeshi Kai

Seigou Sakagami

Takeshi Iijima

Yoshifumi Banno

Masato Yuda

Yukihiro Fujiwara

Kazunari Okada

Shinya Notomi

Tomonori Sakai

Hideki Imafuku

Takamichi Hinohara

Tadatsugu Takada

Fumiki Sato

A system for detecting deflated tires by making a relative comparison among rotation speeds of tires attached to a vehicle. The system includes a rotation speed information detection means for detecting rotation speed information of the tires; a rotation speed calculation means for calculating rotation speeds of the tires; and a determination means for determining deflated tires by comparing a decreased pressure determination value using the calculated rotation speeds with a predetermined threshold value. The determination means determines that the vehicle is going straight when it is found, with regard to factors composed of a lateral G, a yaw rate, and a steering angle of the vehicle, at least two of the factors including the yaw rate show that a difference between the maximum value and the minimum value at a predetermined time is lower than a predetermined value, thereby detecting deflated tires.

System, method, and program for detecting deflated tires

An electric power steering apparatus includes an electric motor configured to apply an assist torque to an steering system of a motor vehicle, a rotational quantity detection unit for detecting a rotational quantity of the electric motor while the rotational quantity detection unit is in a wake-up state, and a counter electromotive voltage detection unit for detecting a counter electromotive voltage of the electric motor. When a main power supply of the electric power steering apparatus is turned off, the rotational quantity detection unit enters into a sleep state, and when a prescribed condition is established based on the counter electromotive voltage detected by the counter electromotive voltage detection unit, the rotational quantity detection unit transitions from the sleep state to the wakeup state.

Electric power steering apparatus

A rear-wheel toe angle variable vehicle changes a toe angle of a rear wheel by a rear toe actuator including: a housing connected to one of a rear-wheel support member and a body; a motor in the housing; a rod connected to the other of the rear-wheel support member and the body; a nut provided in one of the housing and the rod; a screw shaft provided in the other of the housing and the rod; a rotation transmission unit in the housing for transmitting rotation of the motor to the nut or screw shaft; and a rotation amount detection unit for detecting a rotation amount of one of the rotation transmission unit and the nut or screw shaft. The vehicle estimates an operation amount of the rear toe actuator based on the detected amount, and performs feedback control of the motor using the estimated amount.

Rear wheel toe angle variable vehicle

A control apparatus for a vehicle including an inertia force sensor for detecting an inertia force generated in the vehicle and a cooperative control unit connected to the inertia force sensor and connected also to a braking/driving force control unit and a steering control unit so that bidirectional communication is allowed, for deciding and outputting controlled variables or controlled correction variables of the braking/driving force control unit and the steering control unit according to the inertia force detected by the inertia force sensor and according to controlled conditions of the braking/driving force control unit and the steering control unit.

Control apparatus for vehicle having cooperative control unit

An ignition circuit for squib for igniting a squib which has a heat producing portion that includes an electrically conductive portion and a fuel portion, and transmits a heat produced by supplying electrical current to the electrically conductive portion to the fuel portion, the circuit having an electrical current boosting device which steeply boosts electrical current supplied to the electrically conductive portion. The ignition circuit achieves electrical operation with greater reliability and less cost.

Ignition circuit for squib

A charging method for a plurality of squibs which charges up each storage device built in or attached to each squib which is connected to an ignition control device via a common bus, and can be selectively operated by electrical energy and electrical signals which are supplied from the ignition control device, in which, in the case of charging each storage device, the ignition control device carries out a direction of charging initiation, an electric power supply for charging, and a direction of charging stop for each storage device successively, thereby the charging for all storage devices is completed.

Charging method for squib

A squib for bus connection includes a communication and ignition unit which is connected via a pin to a bus line and is received within an inner cap, along with a quantity of a first explosive which does not emit corrosive gas. Furthermore, between this inner cap and an outer cap in which it is received, there is charged a quantity of a second explosive which is of a different type from the first explosive, the second explosive being of a type which is used in a squib in a conventional inflator.

Squib

A longitudinal G sensorand a roll rate sensorare mounted onto a back surfaceof a substratein parallel with an X-axis and a lateral G sensorand a pitch rate sensorare mounted thereon in parallel with a Y-axis, the longitudinal G sensorand the lateral G sensorare positioned thereon in close vicinity to each other, and the roll rate sensorand the pitch rate sensorare positioned thereon in close vicinity to each other, while a vertical G sensorand a yaw rate sensorare mounted onto a surfaceof the substratein orthogonal to a Z-axis and also the vertical G sensorand the yaw rate sensorare mounted thereon in close vicinity to each other.

Acceleration/angular velocity sensor unit

A squib that is used by being connected to a bus is formed by assembling an explosive unit and a communication/ignition unit that have been constructed as separate components. The communication/ignition unit is provided with an IC substrate for ignition and communication that is electrically connected to a bus wire. The explosive unit is provided with explosive, an ignition element, and a header that is interposed between the ignition element and the IC substrate, and that electrically connects the two. In this IC integrated type of squib that is used for communication and ignition, it is possible to prevent the explosive and the IC from mutually interfering with the performances of each other.

A squib associated with a supplemental restraint system includes an igniting agent positioned above a first pin that is a connecting terminal providing a connection with a two-wire system bus wire, which is an external signal wire, and above a header that is provided with a second pin that is a connecting terminal. The squib also includes an IC substrate that controls communications and ignitions, and is positioned above the igniting agent, an ignition element between the igniting agent and the IC substrate, and joining portions provided in two locations bridging the igniting agent so as to connect the IC substrate with the first pin and the header. The IC substrate, the igniting agent, the pin, and the header are covered by a circular cylinder shaped cap whose top portion is closed off. Furthermore, these are formed integrally by being covered by a resin mold that is made to extend across the portions of the pins using a molding process. When the squib is operated it does not electrically affect the external signal wire.

A plurality of the ignition devices are connected to an ignition control system via a common bus. The ignition devices are selectively operable for actuating a plurality of airbag devices by means of electrical energy and an electrical signal supplied from the ignition control system. Each ignition device includes an ignition package formed integrally from a communication/ignition circuit and an ignition element provided on a silicon chip. Not only can the dimensions of the ignition device be reduced in comparison with a case in which the communication/ignition circuit and the ignition element are separately provided, but also wiring between the communication/ignition circuit and the ignition element can be completed beforehand when the ignition device is produced, thereby decreasing the number of wiring steps during assembly with the ignition control system.

Ignition device for bus connection

An inertia sensor unit having a detecting element, a signal processor being constituted as an element separate from the detecting element, for at least amplifying signals output from the detecting element, and an inertia sensor mounted to a detection object for detecting acceleration or angular velocity of the detection object as an inertial force of the detection object to output electrical signals changing according to the inertial force, includes: a first temperature detecting element for detecting the temperature of the signal processor, a second temperature detecting element for detecting the temperature of the detecting element directly or indirectly, and a correcting processor for correcting the signals output from the inertia sensor based on the result detected by the first temperature detecting element and the second temperature detecting element.

Growing community of inventors

Kawachi-gun, Japan

Kazutaka Saito