Patent application number | Description | Published |
20090043466 | Method and apparatus for controlling anteroposterior acceleration of a vehicle - A control apparatus controlling anteroposterior acceleration of a vehicle by controlling a motive power generation apparatus mounted on the vehicle, which is also provided with a staged transmission apparatus that operates on gear ratios. The motive power generation apparatus has an output shaft producing a rotation force in response to a command to be requested. The rotation force is transmitted to the drive wheels via the staged transmission apparatus. A feedback manipulated variable is calculated to control the production of the rotation force of the motive power generation apparatus so that an actual value of anteroposterior acceleration of the vehicle is controlled at a target value thereof. The calculated feedback manipulated variable is used as the command. When the staged transmission apparatus is in the switchover control of the gear ratios, the manipulated variable is is limited from being calculated (for example, stopped from being calculated). | 02-12-2009 |
20090048751 | Method and apparatus for controlling acceleration of a vehicle - A control apparatus controls acceleration of a vehicle provided with a motive power generation apparatus and brake apparatuses. For the control, the control apparatus comprises calculation and actuating blocks. The calculation block calculates torque to be requested, based on a difference between an actual value of the acceleration and a target value thereof and a gain for feedback controlling the actual value of the acceleration to the target value thereof. The gain is differentiated in value between in a first case in which the brake apparatuses are used for the feedback control and a second case in which the brake apparatuses are not used for the feedback control. The actuating block actuates the motive power generation apparatus and the brake apparatuses based on the calculated torque. The value of the gain in the first case is made larger than the value of the gain in the second case. | 02-19-2009 |
20090055068 | VEHICLE DRIVE CONTROL DEVICE - A vehicle drive control device includes an initially determined request acceleration calculation means for calculating an initially determined request acceleration, an automatic drive control means for receiving the initially determined request acceleration and applying a predetermined torque to each wheel, a torque calculation means for calculating an allowable torque not causing a slip at each wheel when the allowable torque is applied thereto, on the basis of a vertical load applied to thereto and a friction coefficient of a road surface, a limit acceleration calculation means for calculating a limit acceleration acting on the vehicle in a case where the calculated allowable torque is applied to each wheel, and a request acceleration determination means for obtaining a request acceleration on the basis of the limit acceleration and the initially determined request acceleration, and for outputting the request acceleration, replacing the initially determined request acceleration, to the automatic drive control means. | 02-26-2009 |
20090076699 | VEHICLE AUTOMATIC OPERATION CONTROL DEVICE - It is an object of the present invention to provide a vehicle automatic operation control device that can perform automatic operation of a vehicle while the actual acceleration favorably tracks the target acceleration. The device comprises a target required torque calculating part ( | 03-19-2009 |
20100138123 | Running control apparatus and running control program for the apparatus - A running control apparatus calculates a target driving or braking torque in a calculating block to control the vehicle driven or braked by this torque at a target speed against a running resistance changed with running circumstances of the vehicle. In a control block, when a driver-required braking torque based on the braking operation of the driver is smaller than the target braking torque, the running control for the vehicle is performed to brake the vehicle by the target braking torque. When the driver-required braking torque becomes higher than the target braking torque, the running control is stopped, and the driver manually brakes the vehicle by the driver-required braking torque. When the driver-required braking torque is decreased to be lower than the target braking torque or a predetermined braking torque corresponding to the release of the braking operation, the running control is restarted. | 06-03-2010 |
20130026817 | BRAKE APPARATUS FOR VEHICLE - A brake apparatus includes: a fluid pressure control valve; a fluid pressure pump; a feedback control circuit correcting a control power corresponding to an feedback control target rotation number of a motor and feed the corrected control power to a motor; a feed forward control circuit configured to feed, to the motor, a control power corresponding to an feed-forward control target rotation number of the motor; and an abnormal control fluid pressure generation control device, if a rotation number detector is abnormal, rotating the electric motor with the rotation number higher than the feedback control target rotation number by a margin rotation number, increases the brake fluid passing through the fluid pressure control valve, and changes the control current to be supplied to the fluid pressure control valve so that the wheel cylinder fluid pressure is not changed. | 01-31-2013 |
20130221734 | BRAKE CONTROL DEVICE FOR VEHICLE - In the brake control device, a wheel-cylinder hydraulic pressure (Pw) obtained by adding the linear-valve pressure difference to a master-cylinder hydraulic pressure (Pm) is applied to the wheel cylinder while the vehicle is running. When an operation of a brake pedal is started while the vehicle is running (t | 08-29-2013 |
Patent application number | Description | Published |
20090005945 | VEHICLE SPEED CONTROL SYSTEM - A vehicle speed control system starts an automatic decelerating operation with a maximum permissible decelerating physical amount “G | 01-01-2009 |
20090024354 | Road gradient estimating system - An estimated gradient value of a road is calculated based on a vehicle acceleration “A” and a time varying portion “A′” of a wheel speed. In a case that an acceleration corresponding value “Ggrad0” for the estimated gradient value is not regarded as indicating an exact figure, due to influences of disturbances, the acceleration corresponding value “Ggrad0” is corrected by a limiting value for rate-of-change with regard to the road gradient depending on respective vehicle speed, and by a limiting value for the road gradient. As a result, the acceleration corresponding value “Ggrad” for the estimated gradient value can be more exactly obtained. | 01-22-2009 |
20090048755 | Vehicle speed control device and method - A vehicle speed control device calculates a desired axle torque for maintaining a speed of a vehicle to a set speed, and conducts cruise control. Specifically, the vehicle speed control device calculates a drive force including a feedforward component corresponding to the set speed and a travel resistance against the travel of the vehicle, and a feedback component corresponding to a deviation of the set speed from the actual speed of the vehicle as a desired axle torque. The vehicle speed control device interrupts the cruise control when a requested drive axle torque requested by an accelerator operation during the cruise control exceeds the desired axle torque, and restarts the cruise control when the requested drive axle torque becomes lower than the desired axle torque. | 02-19-2009 |