Patent application number | Description | Published |
20080201051 | Vehicle driving force control device - A driving force control device includes an individual-wheel friction-circle limit-value calculating portion that calculates friction-circle limit-values of individual wheels, an individual-wheel requested-resultant-tire-force calculating portion that calculates requested resultant tire forces of the individual wheels, an individual-wheel resultant-tire-force calculating portion that calculates resultant tire forces of the individual wheels, an individual-wheel requested-excessive-tire-force calculating portion that calculates requested excessive tire forces of the individual wheels, an individual-wheel excessive-tire-force calculating portion that calculates excessive tire forces of the individual wheels, an excessive-tire-force calculating portion that calculates an excessive tire force, an over-torque calculating portion that calculates an over-torque, and a control-amount calculating portion that calculates a control amount that is output to an engine control unit. | 08-21-2008 |
20080208427 | Vehicle braking-force control device - A braking-force control device has a brake control function for performing brake control on a front outside wheel when a vehicle is detected to be in an oversteer condition during a turning operation and for performing brake control on a rear inside wheel when the vehicle is detected to be in an understeer condition during a turning operation. For preventing the oversteer condition, a command for reducing the engine torque is output. On the other hand, for preventing the understeer condition, the engine torque is limited in accordance with a permissible engine torque value that is calculated on the basis of a road-surface friction coefficient, and ground loads and lateral tire forces of individual wheels. If it is detected that engine braking is in operation, the engine torque is adjusted to substantially zero. | 08-28-2008 |
20080221770 | Vehicle control device - A main controller calculates permissible driving forces of individual wheels from a road-surface friction coefficient, ground loads of the individual wheels, and lateral forces of the individual wheels. The main controller then calculates a permissible engine torque on the basis of the calculated permissible driving forces so as to limit engine output. In addition, based on the calculated permissible driving forces, the main controller calculates a transfer-clutch torque for front-rear driving-force distribution control, a rear-wheel torque shift amount for left-right driving-force distribution control, and a steering-angle correction amount for steering-angle control. | 09-11-2008 |
20080234911 | Vehicle driving force control device - A vehicle driving force control device controls engine torque so as to correct driver's request-engine-torque with the torque-down amount by an engine control unit, the torque-down amount being set into the lower one of a first torque-down amount and a second torque-down amount by a control-amount setting unit, the first torque-down amount being calculated on the basis of a relation between a tire force generated on a tire and a maximum tire force which the tire is capable of exercising against a current road-surface by a first traction control unit, the second torque-down amount being calculated on the basis of a slip rate of the tire by a second traction control unit. | 09-25-2008 |
20080262692 | Road-surface friction-coefficient estimating device - A road-surface friction-coefficient estimating device compares a rack-thrust-force deviation value with a preliminarily set maximum-value-determination threshold value. If the rack-thrust-force deviation value is above the maximum-value-determination threshold value, the device determines that tires are slipping, and sets a front-wheel friction-circle utilization rate in that state as a road-surface friction coefficient. If the rack-thrust-force deviation value is below the maximum-value-determination threshold value, the device refers to a preliminarily set map to determine a restoring speed at which the road-surface friction coefficient is to be restored to 1.0 based on a vehicle speed and a front-wheel slip angle. While restoring the road-surface friction coefficient at the restoring speed, the device calculates and outputs the road-surface friction coefficient. | 10-23-2008 |
20090031418 | Computer, method for controlling access to computer resource, and access control program - Valid state judging means judging a valid state of an access permission based on state of an execution environment; an access permission management table specifying an access permission to computer resource based on the valid state by the valid state judging means; and an access control execution environment conducting access control based on the access permission management table are provided. | 01-29-2009 |
20090120707 | Vehicle tack-in prevention control device - In a driving-force distribution control unit, a first transfer-torque calculation unit calculates an input-torque sensitive transfer torque, a second transfer-torque calculation unit calculates a steering-angle/yaw-rate sensitive transfer torque, and a third transfer-torque calculation unit calculates a tack-in preventing transfer torque. In the third transfer-torque calculation unit, tack-in prevention control is performed during turning at a high speed not only when the accelerator opening is substantially reduced and the current accelerator opening becomes small, but also when the torque amount to be reduced by a traction control unit is more than a preset value. Further, when at least one of a side-slip prevention control unit and an ABS is started, tack-in prevention control is prohibited. | 05-14-2009 |
20100058077 | CONFIDENTIAL INFORMATION MEMORY APPARATUS, ERASING METHOD OF CONFIDENTIAL INFORMATION, AND ERASING PROGRAM OF CONFIDENTIAL INFORMATION - A tamper resistant apparatus | 03-04-2010 |
20100290627 | KEY MANAGEMENT SERVER, TERMINAL, KEY SHARING SYSTEM, KEY DELIVERY PROGRAM, KEY RECEPTION PROGRAM, KEY DELIVERY METHOD, AND KEY RECEPTION METHOD - In distribution and sharing of a cipher key to be used when performing encrypted communication among a plurality of terminals, to share a cipher key without the need for each terminal to constantly hold and manage a large number of keys. Also, to shorten the time needed to start terminal-to-terminal encrypted communication. Also, to improve the portability of the terminal. A key management server | 11-18-2010 |
20110016510 | SECRET INFORMATION MANAGEMENT APPARATUS, INFORMATION PROCESSING APPARATUS, AND SECRET INFORMATION MANAGEMENT SYSTEM - Secret key backup is safely implemented even if a role base access structure in which the access structure is specified using roles is used. An all combination generating unit | 01-20-2011 |
20120036364 | SELF-AUTHENTICATION COMMUNICATION DEVICE AND DEVICE AUTHENTICATION SYSTEM - In a system where a communication device performs secure communication by using a digital certificate, to enable a device of a communication party to verify that a self certificate is certainly generated by a device indicated on the self certificate even if the self certificate is not delivered offline in advance. Based on a master key and a public parameter, a communication device generates an ID-based encryption private key for which a device unique ID is used as a public key. Then, the communication device generates the digital signature of an RSA public key as a ID-based encryption signature by using the ID-based encryption private key. Then, the communication device generates an RSA self signature for the RSA public key, an expiration date, a host name, the device unique ID, and the ID-based encryption signature as the target. Then, the communication device generates a self-signed certificate to include the ID-based encryption signature and the RSA self signature. | 02-09-2012 |
20120207299 | DATA PROCESSING DEVICE - A certification device | 08-16-2012 |
20120297201 | CONFIDENTIAL SEARCH SYSTEM AND CRYPTOGRAPHIC PROCESSING SYSTEM - A confidential search that can flexibly control searchable data depending on a role or authority of a user when the data is shared in a group. When the inner product of an attribute vector and a predicate vector is a predetermined value, the confidential search system conducts pairing computation of decrypted data generated based on the attribute vector and a decryption key generated based on the predicate vector, so as to realize confidential search by utilizing an inner-product predicate encryption process that can decrypt the encrypted data. In particular, the confidential search system enables flexible control of searchable data depending on the role or authority of the user, by devising a method of generating the attribute vector and the predicate vector. | 11-22-2012 |
20120324240 | SECURE SEARCH SYSTEM, PUBLIC PARAMETER GENERATION DEVICE, ENCRYPTION DEVICE, USER SECRET KEY GENERATION DEVICE, QUERY ISSUING DEVICE, SEARCH DEVICE, COMPUTER PROGRAM, SECURE SEARCH METHOD, PUBLIC PARAMETER GENERATION METHOD, ENCRYPTION METHOD, USER SECRET KEY GENERATION METHOD, QUERY ISSUING METHOD, AND SEARCH METHOD - In a secure search system to be used by a plurality of users, the size of a ciphertext is reduced and the need to generate a new ciphertext when a new user is added is eliminated. A public parameter generation device | 12-20-2012 |