Toyota Jidosha Kabushiki Kaisha

Aisin Seiki Kabushiki Kaisha

Takeshi Goto

Kiwamu Kobayashi

Yoji Kunihiro

Yukihide Kimura

Yoshiaki Suzuki

Takahiro Kojo

Kenji Tozu

Yoshio Kudo

Ryuichi Kurosawa

Masao Ueyama

Kunihito Sato

Yuichi Kubota

Ryuuichi Kurosawa

Kazunori Kagawa

Tatsuo Sugitani

Akinori Morishima

Masateru Amano

Shuji Fujita

Tsukasa Watanabe

Daisuke Yamada

Taku Ibuki

Kozo Fujita

Shuuetsu Suzuki

Kimiaki Ono

Mitsuyuki Ouchi

Keitaro Niki

Yutaka Onuma

Ryo Hasegawa

Ikuo Kushiro

Toshiyuki Mikida

Ruri Tanaka

Naotaka Ide

Junro Yamamoto

Mutsumi Miyashiro

Tomihide Masuda

Kunihito Satoh

A power storage device inspecting method of inspecting a power storage device for an internal short circuit that includes: detecting an external resistance Re which is generated in an external circuit in a state in which probes of an external power supply are connected to external terminals of the power storage device; applying an initial output voltage VS() with which an initial device current IB() of a device current IB(t) is zero; applying an output voltage VS(t) from the external power supply to the power storage device; and determining an internal short circuit of the power storage device based on a change with time of the device current IB(t) or a stabilized device current IBs of the power storage device.

Power storage device inspecting method and power storage device manufacturing method

An inspection method of a present electrical storage device includes: constituting a circuit with the electrical storage device being charged and a power supply, and passing a current by the power supply to the circuit in a direction of charging or discharging the electrical storage device; and in passing the current, determining the quality of the electrical storage device based on a converging state of the passing current. In passing the current, an output voltage of the power supply is changed from an initial value with the passage of time.

Inspection method and manufacturing method of electrical storage device

Provided is an electricity storage device testing method including: building a closed circuit by connecting an external power source to a charged electricity storage device such that the direction of voltage of the external power source is opposite from that of the electricity storage device; measuring a circuit current while applying to the closed circuit a voltage in an opposite direction from a voltage of the electricity storage device by the external power source; calculating a voltage to be output by the external power source, based on the value of the circuit current measured and a resistance value of the closed circuit. The output voltage of the external power source is changed according to a result of the calculation. A time interval at which the calculation is set to be shorter at an early stage and longer at a late stage of the measuring.

Electricity storage device testing method and electricity storage device manufacturing method

A circuit is formed by connecting positive terminals and negative terminals of a power storage device and an external power supply, and a resistor and a switch are arranged in series between a positive-side conductor and a negative-side conductor. An ON time for which the switch is temporarily closed before start of inspection is made longer as the capacity of the power storage device is larger. An ON voltage between the positive-side and negative-side conductors within the ON time, and an OFF voltage between these conductors at a time other than the ON time are obtained, and a parasitic resistance value of the circuit is calculated based on the ON and OFF voltages and a resistance value of the resistor. During the inspection, the voltage of the external power supply, which is applied to the power storage device, is increased according to the parasitic resistance value.

Method of inspecting power storage device based on discharge current and method of producing the same

An inspection apparatus including the power supply device, positive and negative conductive lines, connected to the power supply device and having corresponding first and second probes, at corresponding front ends, a resistor and a switch serially disposed between the positive conductive line and the negative conductive line, a circuit resistance calculation unit that calculates a circuit resistance value based on a difference in voltage between when the switch is turned off and turned on, an inspection unit configured to inspect the electrical storage device, and a virtual resistance setting unit that increases the output voltage after the start of inspection.

Inspection apparatus of electrical storage device

An electricity storage device tester including: a voltage application unit configured to apply to a circuit a direct-current voltage; an ammeter configured to acquire a current value of the circuit; a voltage control unit configured to control an output voltage of the voltage application unit; and a determination unit configured to determine whether the electricity storage device is defective or not based on the value acquired by the ammeter. The voltage application unit includes a plurality of power source devices connected in series with each other. One of the power source devices is a specific power source device which is configured to have a variable output voltage and of which both a maximum value and a step width of the output voltage are smaller than the power source devices other than the specific power source device.

Electricity storage device tester

An inspection method of an electrical storage device includes: setting a pseudo parasitic resistance value to be small in a case where a power storage capacity of the electrical storage device is large, while setting the pseudo parasitic resistance value to be large in the case where the power storage capacity is small; in a state where the pseudo parasitic resistance value is set, acquiring a current value after convergence of a current flowing through a circuit such that the circuit is formed by connecting an external power source to the charged electrical storage device in a direction where a voltage is applied thereto; and determining quality of the electrical storage device based on the current value.

Inspection method of electrical storage device and manufacturing method thereof

A circuit is formed by connecting an external power source to a charged electrical storage device so that a polarity of a voltage of the external power source is reverse to a polarity of a voltage of the charged electrical storage device, and the voltage of the external power source is adjusted so that a current does not flow right after the connection. Then, current measurement to acquire a current value after convergence of the current flowing through the circuit due to a voltage drop of the electrical storage device and quality determination based on the current value after convergence are performed. In the current measurement, resistance measurement to actually measure a circuit resistance and prediction to predict a convergence timing of the current based on the actually measured circuit resistance are performed. The current value is acquired when a predicted convergence timing comes.

An exhaust gas recirculation system for an internal combustion engine is provided. The exhaust gas recirculation system includes: an EGR passage configured to connect an exhaust gas passage of the internal combustion engine with an intake air passage; an EGR cooling system arranged at the EGR passage; and a control device configured to control the EGR cooling system. The control device is configured to provide feedback control of the cooling efficiency of the EGR cooling system to cause the temperature of intake gas suctioned into a cylinder of the internal combustion engine to approach a target intake gas temperature. The control device is configured to more increase the amount of change of the cooling efficiency when the flow rate of EGR gas recirculated is less.

Exhaust gas recirculation system for internal combustion engine

A method of inspecting an electric power storage device for a short circuit includes voltage measuring of measuring a pre-detection device voltage of the electric power storage device that is pre-charged, current detecting of detecting a temporal change in a current flowing to the electric power storage device from an external electric power supply or a stable current value of the current by continuously applying an output voltage equal to the pre-detection device voltage to the electric power storage device from the external electric power supply, and determining of determining an internal short circuit in the electric power storage device based on the detected temporal change in the current or the stable current value of the current.

Method of inspecting electric power storage device for short circuit and method of manufacturing electric power storage device

An external electric power supply is connected to a charged electric power storage device in a reverse voltage direction to form a circuit. A voltage of the external electric power supply is adjusted such that a current does not flow immediately after the connection. Then, current measuring of acquiring a converged current value of the current in the circuit due to a decrease in the voltage of the electric power storage device, and quality deciding based on the converged current value are performed. Before the quality deciding, the electric power storage device is grouped such that the converged current value of when the electric power storage device is a normal product is constant in a group. In the quality deciding, a degree of variation in the converged current value is calculated for each group, and the quality is determined by comparing the calculated degree of variation with its predetermined level.

Inspection method and manufacturing method for electric power storage device

A driving support apparatus for a vehicle comprising a steering device that steers steerable wheels, and a control unit configured to execute a running control in which a steered angle of the steerable wheels is changed by controlling the steering device, the control unit being configured to calculate a deviation between an index value of a target running state of the vehicle and an index value of an actual running state, to calculate a target change amount of the steered angle based on the index value deviation, to control the steering device so that a change amount of the steered angle conforms to the target change amount, and to limit a magnitude of a time change rate of the steered angle changed by the running control when one of a magnitude of the index value deviation and a magnitude of the target change amount exceeds a reference value.

Driving support apparatus for vehicle

A driving support device may be configured to calculate a target steering angle for allowing a vehicle to travel along a target course; set, as a reference steering angle, a steering angle when a difference between the steering angle and the target steering angle is small; calculate an indication value indicating intention of a driver's steering operation as a sum of a first product of a corrected steering angle and a steering torque, a second product of a derivative of the corrected steering angle and the steering torque, and a third product of the corrected steering angle and a derivative of the steering torque; and correct the target steering angle based on the indication value so that a target driving support torque is corrected in accordance with the intention of the driver's steering operation.

Driving support device for vehicle including an electric power steering control that generates a steering assist torque

A steering assist device includes: a steering torque detector; a steering operation amount acquisition device; an electric power steering device; and a control device configured to calculate a target control current of the electric power steering device, to supply the control current corresponding to the target control current to the electric power steering device, to determine a situation of steering operation of a driver, and to make a current component corresponding to the target inertia compensation assist torque in the target control current smaller when it is determined that the steering operation is turn-back steering with acceleration and deceleration than when it is determined that the steering operation of the driver is not the turn-back steering with acceleration and deceleration.

Steering assist device

A steering intention determination device includes a calculation unit that calculates a value based on the product of a steering angular velocity and a steering torque and the product of a steering angle and the time differential value of the steering torque, and a determination unit that determines that the driver has a turn-and-steer steering intention in a case where the value is equal to or greater than a predetermined value, determine that the driver has a steering holding intention in a case where the value is less than the predetermined value and the absolute value of the steering angular velocity is less than a predetermined angular velocity, and determine that the driver has a switchback steering intention in a case where the value is less than the predetermined value and the absolute value of the steering angular velocity is equal to or greater than the predetermined angular velocity.

Growing community of inventors

Toyota, Japan

Takeshi Goto