A vehicle-behavior control apparatus for the vehicle with a sub-transmission comprising of a control unit. This control unit is adapted to be connected to an engine system and vehicle status sensors, and directs the engine system to suppress a traction in response to spin or driftout moment determined from any outputs of the vehicle status sensors. The control unit limits the suppression of the traction when a position sensor of the sub-transmission indicates that the sub-transmission is at a lower speed range.

Vehicle-behavior control apparatus and method

A vehicle is equipped with a coupling such as, for example, a center differential or a variable clutch, that transmits a driving force from an engine to a front-wheel drive shaft and a rear-wheel drive shaft while allowing a difference in rotational speed therebetween and a brake controller that individually controls braking forces to be applied to wheels in accordance with a running state of the vehicle. A vehicular brake controller prohibits braking force control from being started if the coupling is in its locked state or when the coupling causes a relatively great connecting strength to exist between the front-wheel and rear-wheel drive shafts. While braking force control is being performed by the brake controller, braking force control is continued even if there is a command to cause the coupling to be locked or to achieve the great coupling strength.

Vehicular brake control apparatus and vehicular brake control method

A regenerative braking system has a generator connected to at least one wheel set to apply regenerative brake torque to it by generating electricity, a regenerative braking control means controlling a regenerative braking amount, an actual wheel speed variation calculating means calculating an actual wheel speed variation between actual outer-wheel speed of an outer wheel of steerable wheels and actual inner-wheel speed of at least one wheel of front and rear wheel sets, a correspondent wheel speed variation calculating means calculating a correspondent wheel speed variation corresponding to an outer-to-inner wheel speed variation of the steerable wheels with road grip, a steer characteristic judging means judging strength of a steer characteristic based on the correspondent wheel speed variation and the actual wheel speed variation, and a regenerative braking amount compensating means compensating the amount to be more decreased as the steer characteristic becomes stronger.

Regenerative braking system for motor vehicles

A brake control apparatus for controlling at least three brake devices provided for braking respective at least three wheels of an automotive vehicle which includes two wheels located on respective left and right sides of the vehicle, wherein an emergency brake control portion is provided for controlling at least two normal brake devices when at least one of the at least three brake devices is defective, such that a difference between a total left-side braking force to be generated by at least one normal brake device located on the left side of the vehicle and a total right-side braking force to be generated by the other normal brake device or devices located on the right side is made larger when operations of all of the normal brake devices in a detected running condition of the vehicle are not likely to deteriorate the vehicle running stability, than when the operations of all of the normal brake devices in the detected running condition are likely to deteriorate the vehicle running stability.

Vehicle brake control apparatus for controlling normal wheel brakes upon detection of defective wheel brake or brakes

A rolling motion stability control apparatus restrains a roll increasing tendency of a vehicle, with each wheel of the vehicle being braked by a wheel brake device. A first braking force control device is provided for applying a first braking force to the wheel, when the vehicle is turned to one direction. A second braking force control device is provided for applying a second braking force to the wheel, when the vehicle is turned to the other direction. References for starting controls of the first and second braking force control devices are set to be of predetermined values, respectively. The reference for starting the control of the second braking force control device is modified to be smaller than a predetermined value, when the vehicle is turned to the one direction.

Rolling motion stability control apparatus for a vehicle

Disclosed is a method for improving the handling characteristics of a vehicle while braking during cornering, comprising the following steps: detecting cornering and cornering direction; determining the rolling characteristics of individual wheels, optionally influencing the braking pressure of a brake on a wheel or several wheels according to the rolling characteristics of said wheels; checking the state of the vehicle to determine instabilities, and modifying braking pressure applied on at least one wheel when an instability is detected during a cornering maneuver extending for a time period exceeding a threshold time. Also disclosed is a device for improving handling characteristics while braking during cornering, comprising a detection device (320) for detecting a cornering maneuver and the direction of cornering, a determination device (302a-d) to determine the rolling characteristics of individual wheels (303a-d); an influencing device (309, 310) which optionally influences the braking pressure of the brakes (301a-d, 306a-d) on a wheel (303a-d) according to the rolling characteristics of said wheel (303a-d), a checking device (321) to check the state of the vehicle to determine instabilities, and a modification device (322) to modify the braking pressure of at lest one brake (301a-d, 306a-d) on a wheel (303a-d) when an instability is detected during a cornering maneuver extending for a time period exceeding a threshold time

Georg Roll

Papers

Method and device for improving the handling characteristics of a vehicle while braking during cornering