Mitsubishi Denki Kabushiki Kaisha

Mitsubishi Electric Corporation

Koji Nagao

Keiichi Enoki

Toru Morita

Masaru Fuku

Hisashi Ishikura

Fumitaka Satou

Hirofumi Tatsukawa

Takayuki Kifuku

Masahiko Kurishige

To obtain an electric power steering control apparatus hard to generate vibration even when accuracy is not high enough for torque vibration of extremely small output of torque detecting means. An electric power steering control apparatus includes steering torque detecting means, a torque controller that computes an auxiliary torque current, a motor that generates a torque for assisting a steering torque, current steering component removing means for removing a component by steering, vibration velocity estimating means for estimating a vibration velocity in a rotational direction of the motor, and a damping controller that computes a damping current to be added to the auxiliary torque current, and the vibration velocity estimating means includes vibration acceleration computing means for computing vibration acceleration in the rotational direction of the motor by multiplication of a motor current output from the current steering component removing means, and rotational acceleration integrating means for computing the vibration velocity in the motor rotational direction by integrating the vibration acceleration computing means.

Electric power steering control apparatus

Provided is an electric power steering control device capable of performing damping control without current detection to perform stable damping control even when a target current and an actual current value differ from each other. The electric power steering control device includes steering torque detection means for detecting a steering torque, a torque controller for computing an assist torque current, a motor for generating a torque for assisting the steering torque, rotation speed estimation means for estimating a rotation speed of the motor, and a damping controller for computing a damping current by using an estimated value of the rotation speed of the motor. The rotation speed estimating means includes steering component removing means for steering torque, for removing a component due to steering from an output of the steering torque detection means, rotation angle corresponding value computing means for multiplying an output of the steering component removing means for steering torque by an inverse number of a rigidity of a torsion bar and &#x2212;1 to compute a value corresponding to a rotation angle, and a rotation angle differentiator for differentiating an output of the rotation angle corresponding value computing means to compute a value corresponding to a rotation angular velocity.

Motor-driven power steering control device

A vehicle key system comprises a mobile transmitter including a fingerprint information capturing unit for capturing fingerprint information from a user's fingerprint, and a transmit unit for transmitting the fingerprint information captured by the fingerprint information capturing unit together with a system-specific identifier. A receiver disposed in a vehicle includes a receive unit for receiving the fingerprint information and the identifier transmitted from the transmit unit of the mobile transmitter, a verification unit for verifying the fingerprint information against a list of pieces of previously stored fingerprint information, and for verifying the received identifier against a previously stored identifier, and a control unit for controlling pieces of equipment in the vehicle according to verification results from the verification unit.

Vehicle key system

A vehicle key system includes a fingerprint verification unit for verifying identity of fingerprint information captured by a fingerprint information capturing unit by comparing it with a list of pieces of fingerprint information about fingerprints of authorized users stored in a fingerprint information storage unit. A manipulation detection unit can detect at least one of a predetermined manipulation of an operation unit, such as a wiper switch, a winker switch, or a shift lever, and a predetermined manipulation of a pedal, such as an acceleration pedal, a brake pedal, or a clutch pedal. A processing mode switching unit can switch between a plurality of processing modes according to the predetermined manipulation detected by the manipulation detection unit.

A vehicle key system comprises a transmitter including a fingerprint information capturing unit for capturing fingerprint information from a user's fingerprint, and a transmit unit for transmitting the fingerprint information captured by the fingerprint information capturing unit. The system also includes an attaching unit disposed in a vehicle, for attaching the transmitter thereto, and a receiver disposed in the vehicle, including a receive unit for receiving the fingerprint information transmitted from the transmit unit of the transmitter, a fingerprint verification unit for verifying the fingerprint information against a list of pieces of previously stored fingerprint information, an attaching detection unit for determining whether or not the transmitter is attached to the attaching unit, and a control unit for controlling pieces of equipment in the vehicle according to a verification result from the fingerprint verification unit and a detection result from the mounting detection unit. The user can manipulate the pieces of equipment, e.g. start the engine, by actuating a switch, only when the electronic key transmitter is attached to the attaching unit.

A portable transmitter of vehicle key system comprising a fingerprint detecting portion for detecting the user's fingerprint, a sending component for sending the fingerprint data from this fingerprint detecting portion, and a sender switch for triggering the transmission of fingerprint data from this sending component, this sender switch and the fingerprint detecting portion being disposed integrally, whereby the sender switch is activated in accordance with the user operating the fingerprint detecting portion.

Growing community of inventors

Tokyo, Japan

Koji Nagao