Abstract: After a vehicle has entered a curve, a deviation (Sch) between a target turning state quantity Td and an actual turning state quantity Ta is computed. In a stage in which Sch does not reach a predetermined value after the vehicle has entered the curve, the possibility of the vehicle traveling in the curve is judged to be low, and the reliability of the curve information Rc, Pc is judged to be low. In this case, a determination for prohibiting execution of control (So=0) is made. In a stage after Sch has reached the predetermined value, the possibility of the vehicle traveling in the curve is judged to be high, and the reliability of the curve information Rc, Pc is judged to be high. In this case, a determination for permitting execution of the control (So=1) is made. Deceleration control is started and executed only when a control start condition is satisfied, and the determination for permission is made.

Abstract: A vehicle motion control device providing good trace performance with a simple configuration for performing a rollover prevention control involving suppressing rollover of a vehicle by applying a braking force to a front wheel located on the radially outer of the turning locus and a rear wheel located on the radially outer of the turning locus, comprises a braking control unit configured to restrict the application of the braking force to the front wheel located on the radially outer of the turning locus until a predetermined limit time elapses since the application of the braking force to the rear wheel located on the radially outer of the turning locus is started when the braking force is applied to the front wheel located on the radially outer of the turning locus and the rear wheel located on the radially outer of the turning locus as the rollover prevention control.

Abstract: A plurality of position data sets representing a plurality of points on a road ahead of a vehicle are acquired, and the degree of curvature of the road at each point is computed. On the basis of the degree of curvature, a constant curvature degree section of a curve is identified, and the degree of curvature and the end position of the constant curvature degree section are determined. In order to cause the vehicle to properly pass through the curve, curve deceleration control is executed on the basis of the actual vehicle speed, a proper vehicle speed determined from the degree of curvature, and the end position of the constant curvature degree section. That is, the curve deceleration control is performed on the basis of the start point of a section of a curve having the maximum degree of curvature and the constant degree of curvature of that section.

Abstract: If an actual lateral acceleration is equal to or greater than a target lateral acceleration Gth and at least one of a steering angle lateral acceleration Gys and a yaw-rate lateral acceleration Gyy is less than the target lateral acceleration Gth, the increase of the W/C pressure of the vehicle to be controlled is inhibited. Accordingly, it is possible to suppress the increase in the roll angle by actively generating the understeering to suppress rolling and to early suppress an increase in understeering if the increase in understeering is made to be unnecessary.

Abstract: A rollover suppression control apparatus and method are provided. The apparatus includes a rollover state value detection unit which detects a rollover state value indicating that a vehicle is under rollover tendency, a braking force applying unit which performs a rollover suppression control of applying braking force to a wheel of the vehicle to suppress the rollover thereof when the detected rollover state value is greater than the control threshold value, a understeer state detection unit which detects whether a traveling state of the vehicle is a understeer state or a non-understeer state, and a setting unit which sets a first control threshold value as the control threshold value when the traveling state is detected as the non-understeer state, and which sets a second control threshold value greater than the first control threshold value as the control threshold value when the traveling state is detected as the understeer state.

Abstract: A speed control device for a vehicle includes a vehicle speed obtaining means obtaining a vehicle speed, a shape obtaining means obtaining a curve shape, a position obtaining means obtaining a positional relationship between a curve and the vehicle, a target vehicle speed determining means determining a target vehicle speed based on the curve shape and the positional relationship, a vehicle speed controlling means controlling the vehicle speed based on the target vehicle speed and the vehicle speed, and an acceleration operation quantity obtaining means obtaining an operation quantity of an acceleration operating member operated by a driver, wherein the target vehicle speed determining means includes a modification means modifying the target vehicle speed based on the operation quantity so that the target vehicle speed obtained when the operation variable is greater than zero becomes a greater value than the target vehicle speed obtained when the operation quantity is zero.

Abstract: A vehicle motion control device providing good trace performance with a simple configuration for performing a rollover prevention control involving suppressing rollover of a vehicle by applying a braking force to a front wheel located on the radially outer of the turning locus and a rear wheel located on the radially outer of the turning locus, comprises a braking control unit configured to restrict the application of the braking force to the front wheel located on the radially outer of the turning locus until a predetermined limit time elapses since the application of the braking force to the rear wheel located on the radially outer of the turning locus is started when the braking force is applied to the front wheel located on the radially outer of the turning locus and the rear wheel located on the radially outer of the turning locus as the rollover prevention control.

Abstract: A speed control device includes: a reference point setting unit that sets, based on shape and position of a curve in advance of a vehicle, first and second reference points within the curve, the second reference point being nearer the curve exit than the first reference point; a distance calculating unit that calculates, based on the vehicle location and the reference points, first and second distances, between the vehicle and the first and second reference points, respectively; a target speed determination unit that determines, based on the curve shape and the first and second distances, the first and second target vehicle speeds to be maintained, respectively, before and after passing the first reference point; and a speed control unit that controls the speed of the vehicle based on the target speeds and the detected speed of the vehicle.

Abstract: Factor information is acquired that indicates at least one factor that imposes a psychological effect on a driver of a host vehicle when the host vehicle is traveling on a road with a descending slope ahead of the host vehicle. An overall psychological effect that is imposed on the driver when the host vehicle is traveling on the road with the descending slope is acquired based on the factor information. The vehicle speed is controlled in a vehicle speed control section in accordance with the overall psychological effect.

Abstract: A target vehicle speed at a predetermined position ahead of a host vehicle is obtained, and a plurality of deceleration patterns with different deceleration schemes is obtained for decelerating the host vehicle to the target vehicle speed. Based on a driving operation for controlling speed of the host vehicle, a deceleration pattern is selected from the plurality of deceleration patterns. Using the selected deceleration pattern as a reference, the vehicle speed of the host vehicle is reduced to the target vehicle speed before the host vehicle reaches the predetermined position.

Abstract: A rollover suppression control apparatus and method are provided. The apparatus includes a rollover state value detection unit which detects a rollover state value indicating that a vehicle is under rollover tendency, a braking force applying unit which performs a rollover suppression control of applying braking force to a wheel of the vehicle to suppress the rollover thereof when the detected rollover state value is greater than the control threshold value, a understeer state detection unit which detects whether a traveling state of the vehicle is a understeer state or a non-understeer state, and a setting unit which sets a first control threshold value as the control threshold value when the traveling state is detected as the non-understeer state, and which sets a second control threshold value greater than the first control threshold value as the control threshold value when the traveling state is detected as the understeer state.

Abstract: If an actual lateral acceleration is equal to or greater than a target lateral acceleration Gth and at least one of a steering angle lateral acceleration Gys and a yaw-rate lateral acceleration Gyy is less than the target lateral acceleration Gth, the increase of the W/C pressure of the vehicle to be controlled is inhibited. Accordingly, it is possible to suppress the increase in the roll angle by actively generating the understeering to suppress rolling and to early suppress an increase in understeering if the increase in understeering is made to be unnecessary.

Abstract: A steering control device for a vehicle includes a first adjustment value determination means for determining a first adjustment value of a value corresponding to a wheel steering angle based on an actual value and a target value of turning state quantity, the first adjustment value is a value directing to approximate the actual value to the target value, and a steering control means for adjusting the wheel steering angle by modifying the value corresponding to the wheel steering angle based on the first adjustment value, wherein the first adjustment value determination means includes an index value obtaining means for obtaining an index value indicating a probability of an occurrence of a side-slip of a wheel and a regulation means for regulating the first adjustment value so that the greater the probability of the occurrence of the side-slip is, the smaller the first adjustment value is set to be.

Abstract: After a vehicle has entered a curve, a deviation (Sch) between a target turning state quantity Td and an actual turning state quantity Ta is computed. In a stage in which Sch does not reach a predetermined value after the vehicle has entered the curve, the possibility of the vehicle traveling in the curve is judged to be low, and the reliability of the curve information Rc, Pc is judged to be low. In this case, a determination for prohibiting execution of control (So=0) is made. In a stage after Sch has reached the predetermined value, the possibility of the vehicle traveling in the curve is judged to be high, and the reliability of the curve information Rc, Pc is judged to be high. In this case, a determination for permitting execution of the control (So=1) is made. Deceleration control is started and executed only when a control start condition is satisfied, and the determination for permission is made.

Abstract: A plurality of position data sets representing a plurality of points on a road ahead of a vehicle are acquired, and the degree of curvature of the road at each point is computed. On the basis of the degree of curvature, a constant curvature degree section of a curve is identified, and the degree of curvature and the end position of the constant curvature degree section are determined. In order to cause the vehicle to properly pass through the curve, curve deceleration control is executed on the basis of the actual vehicle speed, a proper vehicle speed determined from the degree of curvature, and the end position of the constant curvature degree section. That is, the curve deceleration control is performed on the basis of the start point of a section of a curve having the maximum degree of curvature and the constant degree of curvature of that section.

Abstract: A speed control device includes: a reference point setting unit that sets, based on shape and position of a curve in advance of a vehicle, first and second reference points within the curve, the second reference point being nearer the curve exit than the first reference point; a distance calculating unit that calculates, based on the vehicle location and the reference points, first and second distances, between the vehicle and the first and second reference points, respectively; a target speed determination unit that determines, based on the curve shape and the first and second distances, the first and second target vehicle speeds to be maintained, respectively, before and after passing the first reference point; and a speed control unit that controls the speed of the vehicle based on the target speeds and the detected speed of the vehicle.

Abstract: A speed control device for a vehicle includes a vehicle speed obtaining means obtaining a vehicle speed, a shape obtaining means obtaining a curve shape, a position obtaining means obtaining a positional relationship between a curve and the vehicle, a target vehicle speed determining means determining a target vehicle speed based on the curve shape and the positional relationship, a vehicle speed controlling means controlling the vehicle speed based on the target vehicle speed and the vehicle speed, and an acceleration operation quantity obtaining means obtaining an operation quantity of an acceleration operating member operated by a driver, wherein the target vehicle speed determining means includes a modification means modifying the target vehicle speed based on the operation quantity so that the target vehicle speed obtained when the operation variable is greater than zero becomes a greater value than the target vehicle speed obtained when the operation quantity is zero.

Abstract: A target vehicle speed at a predetermined position ahead of a host vehicle is obtained, and a plurality of deceleration patterns with different deceleration schemes is obtained for decelerating the host vehicle to the target vehicle speed. Based on a driving operation for controlling speed of the host vehicle, a deceleration pattern is selected from the plurality of deceleration patterns. Using the selected deceleration pattern as a reference, the vehicle speed of the host vehicle is reduced to the target vehicle speed before the host vehicle reaches the predetermined position.

Abstract: Factor information is acquired that indicates at least one factor that imposes a psychological effect on a driver of a host vehicle when the host vehicle is traveling on a road with a descending slope ahead of the host vehicle. An overall psychological effect that is imposed on the driver when the host vehicle is traveling on the road with the descending slope is acquired based on the factor information. The vehicle speed is controlled in a vehicle speed control section in accordance with the overall psychological effect.

Abstract: A steering control device for a vehicle includes a first adjustment value determination means for determining a first adjustment value of a value corresponding to a wheel steering angle based on an actual value and a target value of turning state quantity, the first adjustment value is a value directing to approximate the actual value to the target value, and a steering control means for adjusting the wheel steering angle by modifying the value corresponding to the wheel steering angle based on the first adjustment value, wherein the first adjustment value determination means includes an index value obtaining means for obtaining an index value indicating a probability of an occurrence of a side-slip of a wheel and a regulation means for regulating the first adjustment value so that the greater the probability of the occurrence of the side-slip is, the smaller the first adjustment value is set to be.