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Tomohiko Yasuda

Tomohiko Yasuda, Kashiwa JP

Patent application numberDescriptionPublished
20090242294ELECTRIC DRIVE VEHICLE - An electric drive vehicle having a power generator coupled to an engine, a first power converter connected with the power generator for converting the AC power generated by the power generator to DC power, a second power converter connected with the first power converter, for converting the DC power to AC power, a power consuming device for consuming the DC power, connected to a DC circuit between the first and second power converters, an electric motor connected with the second power converter, and wheels driven by the electric motor, wherein the vehicle has a first control mode for controlling the output of the electric motor and a second control mode for controlling the power consumed by the power consuming device, and the second control mode performs such control that the operations of the second power converter and the electric motor in the first control mode are simulated.10-01-2009
20100161164ELECTRIC VEHICLE WITH PITCH CONTROL DEVICE - Changes in the number of passengers or in load cause significant changes in vehicle weight, thus making it impossible to appropriately suppress a pitching motion of a vehicle chassis, hence rendering a necessary driving torque difficult to ensure, resulting in a decrease in drivability being insuppressible. An electric vehicle with a drive including a motor and a controller comprises a pitching quantity detector that detects a magnitude of a pitching motion of the vehicle, a vehicle weight determination unit that determines weight of the vehicle, a torque correction calculator that uses a traveling state of the vehicle and the determined vehicle weight to change a driving torque output from the drive, and a control gain varying element that adjusts a control gain of the torque correction calculator according to a magnitude of the vehicle weight value output from the vehicle weight determination unit.06-24-2010
20100204887TURNING MOTION ASSISTANCE DEVICE FOR ELECTRIC VEHICLE - Disclosed herein is a turning motion assistance device for an electric vehicle, adapted to effectively reduce tire wear of the vehicle while at the same time ensuring appropriate turning response.08-12-2010
20100238007VEHICLE HAVING TIRE WEAR EVALUATION SYSTEM - A vehicle which evaluates tire wear properly even in a road condition that tires easily slip or lock up. The vehicle, which has a driven wheel and a driving wheel with tires attached thereto, includes: a revolution speed detector for detecting revolution speeds of the driven and driving wheels; a wheel speed detector for detecting wheel speeds of the driven and driving wheels based on the detected revolution speed data of the driven and driving wheels; a wheel speed ratio detector for detecting a wheel speed ratio between the driven and driving wheels based on the detected wheel speed data of the driven and driving wheels; and a tire condition evaluator for outputting an evaluation result indicating that the tire(s) attached to the driven wheel and/or driving wheel is(are) worn when the wheel speed ratio is higher than a preset threshold.09-23-2010
20110010040SYSTEM FOR MONITORING FOR RISK OF ROAD SHOULDER COLLAPSE, AND TRANSPORT VEHICLE - Disclosed herein is a shoulder collapse risk monitoring system capable of alerting a driver to a risk of a road shoulder collapse during approach operations to the shoulder.01-13-2011
20120212047ELECTRIC DRIVE VEHICLE - Problem to be Solved: To provide an electric drive vehicle that can be implemented inexpensively with a simple configuration, and includes a long-life power supply circuit of a diesel boost system.08-23-2012
20120239234ELECTRIC VEHICLE WITH PITCH CONTROL DEVICE - An electric vehicle includes a pitching state quantity detector for detecting quantity of a pitching-motion of the vehicle, a vehicle weight determiner, a pitching target quantity calculator for calculating a target quantity of a pitching motion at least from the determined vehicle weight, and a torque correction calculator for increasing/reducing a driving torque output, according to a particular differential between the detected pitching-motion state quantity and the calculated target quantity.09-20-2012
20120239257DUMP VEHICLE OVERTURN PREVENTING DEVICE - Provided is an overturn preventing device for a dump vehicle equipped with a body (09-20-2012
20120279793ELECTRICALLY DRIVEN VEHICLE - Provided is an electrically driven vehicle capable of suppressing drive wheel slipping, even in low-speed regions where wheel speeds are undetectable.11-08-2012

Patent applications by Tomohiko Yasuda, Kashiwa JP

Tomohiko Yasuda, Kashiwa-Shi JP

Patent application numberDescriptionPublished
20090048064DRIVE SYSTEM FOR ELECTRICALLY DRIVEN DUMP TRUCK - A drive system of an electrically driven dump truck is capable of achieving an operational feeling in which the operation amount of the accelerator pedal is well balanced with the output horsepower of the electric motors, particularly at the time of slow traveling. To achieve this, the target motor output horsepower Pm02-19-2009
20090132116DRIVE SYSTEM FOR ELECTRICALLY DRIVEN DUMP TRUCK - A drive system of an electrically driven dump truck that 05-21-2009
20090251090DRIVE SYSTEM FOR ELECTRICALLY DRIVEN DUMP TRUCK - A drive system for an electrically driven dump truck is capable of preventing a prime mover from stalling and is also capable of enabling electric motors for traveling to make full use of the output horsepower of the prime mover up to an output limit of the prime mover. The target motor horsepower Mr10-08-2009
20100051359DUMP TRUCK - An electrically-driven dump truck 03-04-2010
20100222951DRIVE SYSTEM FOR ELECTRICALLY DRIVEN DUMP TRUCK - Engine driving characteristics are achieved for driving a hydraulic system during non-traveling and traveling in an electrically driven dump truck.09-02-2010
20120205961TRANSPORTER VEHICLE - Rear wheel tires of a vehicle body are spaced apart from each other in the vehicle width direction. A foreign object removing device is provided between an outer tire and an inner tire of the rear wheels on one side of the vehicle for removing foreign objects between the tires. The foreign object removing device includes a bar-shaped member inserted in a suspended state between the tires, and a shoe provided in a lower end side of the bar-shaped member to collide with foreign objects such as earth and sand, and stones getting in between the tires for flicking out the foreign objects from between the tires. The shoe is replaceably attached to the lower end side of the bar-shaped member by using a bolt. In a case where the shoe wears down, only the shoe is replaced.08-16-2012

Patent applications by Tomohiko Yasuda, Kashiwa-Shi JP

Tomohiko Yasuda, Ibaraki JP

Patent application numberDescriptionPublished
20090102273Hydraulic Drive Device for Vertical Pivoting Movement of Load Carrying Platform - [Problems] To simplify switching control of a directional control valve and to simplify the structure of a directional control valve for controlling operation of a hoist cylinder.04-23-2009
20090145121Hydraulic Drive Device for Dump Truck - [OBJECT] To provide a hydraulic drive system for a dump truck, which can prevent an excessive increase in engine rotation speed upon operation of a truck body.06-11-2009

Tomohiko Yasuda, Tsuchiura-Shi JP

Patent application numberDescriptionPublished
20130069416Dump Truck - To provide a dump truck capable of assuring a large authorized payload weight while inhibiting spilling of an object under haulage over parts of side walls. A dump truck is provided on a frame 03-21-2013