Toyota Jidosha Kabushiki Kaisha

Cataler Corporation

Nippon Steel Chemical & Material Co., Ltd.

Yuki Makino

Atsushi Tabata

Koichi Okuda

Masato Nakano

Masafumi Yamamoto

Koji Takaira

Akinori Homan

Kunihiko Usui

Akira Ijichi

Yosuke Akiyama

Tooru Matsubara

Kota Fujii

Koji Hayashi

Yoshito Sekiguchi

Mikihiro Kataoka

Nobuaki Mizutani

Toshiaki Tamachi

Yusuke Itoh

Toru Yamamoto

Kotaro Horiai

Shotaro Suzuki

Ken Fujimoto

A software update system according to one embodiment of the present disclosure is configured to update software used in a vehicle based on update data of the software, the update data being transmitted to the vehicle from an external device that is communicably connected to the vehicle. The software update system includes: a software update unit configured to update the software based on the update data; a vehicle data acquisition unit configured to acquire respective pieces of second vehicle data about states of the vehicle before and after the software update by the update unit; and an effect evaluation unit configured to evaluate an effect of the software update based on the respective pieces of second vehicle data before and after the software update.

System, device and medium for evaluating the effect of a vehicle software update

A software update system includes: a vehicle data acquiring unit configured to acquire data on a state of a vehicle including data of a predetermined performance of the vehicle; an effect predicting unit configured to predict an effect on the predetermined performance which is obtained when update data of software used in the vehicle for improvement of the predetermined performance is applied to the vehicle based on the data acquired by the vehicle data acquiring unit; and a delivery unit configured to deliver the update data to the vehicle when the effect predicted by the effect predicting unit satisfies a predetermined reference and to withhold delivery of the update data to the vehicle when the effect predicted by the effect predicting unit does not satisfy the predetermined reference.

Information processing system, information processing device, information processing method, and recording medium

When regeneration control is performed while yaw rate control is being performed, the regeneration control is prohibited, or a regenerative torque of a second rotary machine based on the regeneration control is limited in comparison with a case in which the yaw rate control is not performed. Accordingly, since an influence of the regenerative torque controlled by the regeneration control on the yaw rate control can be suitably curbed, it is possible to curb deterioration in conformability of an actual yaw rate with a target yaw rate in the yaw rate control.

Simultaneous regenerative braking and yaw rate control for a four-wheel-drive vehicle

A vehicle drive device and a control method therefor are provided. The vehicle drive device includes: a power source including a first rotating electrical machine; a second rotating electrical machine; a differential unit including three rotating elements to which a first output shaft, a second output shaft, and the second rotating electrical machine are connected; and an electronic control device. The electronic control device regeneratively controls the first rotating electrical machine and the second rotating electrical machine in such a manner that negative torque is applied to the first output shaft and the second output shaft, when performing regenerative control by the second rotating electrical machine in a drive mode in which torque from the power source is distributed to the first output shaft and the second output shaft by controlling torque of the second rotating electrical machine during deceleration of a vehicle.

Vehicle drive device and control method for the same

A regenerative torque upper limit is set to a larger value when a rear-wheel distribution ratio is small than when the rear-wheel distribution ratio is large. Accordingly, when a distribution of a drive power to front wheels is large, a regenerative torque of a second rotary machine can be increased such that wheels are less likely to slip at the time of performing of regeneration control when the distribution of the drive power to the front wheels is small in comparison with a case in which the regenerative torque upper limit is set to a constant value similarly to when the distribution of the drive power to the front wheels is small. In this way, it is possible to increase the regenerative torque of the second rotary machine according to the rear-wheel distribution ratio.

Four-wheel-drive vehicle

A central ECU includes a download execution feasibility determination unit that determines whether or not execution of download of data from an external distribution server of a vehicle is feasible based on position information of the vehicle, a download execution unit that executes the download in a case where the download execution feasibility determination unit determines that the execution of the download is feasible, and a transmission unit that records execution failure result information including position information of the vehicle when the download is executed by the download execution unit and fails, in an external monitoring server of the vehicle, in which the download execution feasibility determination unit determines whether or not the execution of the download is feasible based on the execution failure result information recorded in the distribution server and the current position information of the vehicle.

In-vehicle device, information processing device, download execution feasibility determination method, program, recording medium

A vehicle drive device includes: a brake that is provided with a plurality of friction plates, a first piston and a second piston, and a first piston hydraulic chamber and a second piston hydraulic chamber, and selectively fixes the third rotating element to a fixing member; a hydraulic control circuit that controls supply of the hydraulic pressure to the first piston hydraulic chamber and the second piston hydraulic chamber; and a control device. The control device controls the hydraulic control circuit such that the hydraulic pressure is supplied to the first piston hydraulic chamber and the second piston hydraulic chamber when the first traveling mode is set, and controls the hydraulic control circuit such that the hydraulic pressure is supplied only to one of the first piston hydraulic chamber and the second piston hydraulic chamber when the second traveling mode is set.

Vehicle drive device

When evacuation travel is performed using only a drive power from one drive power source of an engine and a rotary machine, a drive power distribution device is prohibited from switching to a four-wheel-drive state and thus evacuation travel is performed in a two-wheel-drive state in which a loss in a power transmission device is relatively small. Accordingly, in a four-wheel-drive vehicle, it is possible to increase an evacuation-travelable distance when evacuation travel is performed using only the drive power from one drive power source of the engine and the rotary machine.

Because an EOP starts operating from when a decrease in discharge flow rate of an MOP is predicted or detected, a PL actual pressure that should be obtained with a PL command pressure set to a value for a required transmission torque is more easily maintained even when the discharge flow rate of the MOP becomes insufficient. After a lapse of a predetermined period of time from the start of operation of the EOP, the PL command pressure is temporarily set to a value higher than the value for the required transmission torque, and a regulator valve is controlled to operate to close a drain port. Therefore, the operation of the EOP in a high PL actual pressure is reduced, and a delay in response of a pressure regulating operation of the regulator valve in the process of reduction of the discharge flow rate of the MOP is reduced.

Hydraulic supply system

The present invention relates to an electrode catalyst for a fuel cell that includes a carbon support () having pores () and catalyst particles containing platinum or a platinum alloy supported on the carbon support (). The pores () of the carbon support () have a mode size of pores () in a range of 2.1 nm to 5.1 nm. A total pore volume of the pores () of the carbon support () is in a range of 21 cm/g to 35 cm/g. A distance between the catalyst particles and a surface of the carbon support () is in a range of 2.0 nm to 12 nm as a distance of a 50% cumulative frequency.

Growing community of inventors

Aichi-gun, Japan

Yuki Makino