摘要:
In a vehicular braking control apparatus, a target regenerative braking force and a target factional braking force are calculated on the basis of a reference vehicle deceleration Gbt based on an amount of braking operation performed by a driver. Braking forces are usually controlled in a cooperative braking mode realized by regenerative braking and frictional braking (S100 to S210). Braking forces for wheels are controlled in a single braking mode realized by the frictional braking when a braking control is performed for the first time or for the last time in a predetermined number of times, and a correction coefficient (Kp) is calculated as a ratio of a reference vehicle deceleration (Gbt) to an actual vehicle deceleration (Gbx) during the braking control (S90, S220 to S280). The target frictional braking force is corrected by being multiplied by Kp (S190). Hence, a total braking force for the vehicle is prevented from fluctuating when the braking force control mode shifts between the cooperative braking mode and the single braking mode. Thus, the vehicle deceleration is prevented from abruptly changing (S110 to S210).
摘要:
A vehicle speed while cornering or curving through steering maneuver is determined. A vehicle speed determination system is applicable to a vehicle having a front wheel (8) and a rear wheel (23). The system includes: a wheel speed sensor (35) configured to detect a wheel speed V f of the front wheel (8); and an arithmetic section for determining a vehicle speed V(r) at a point on the rear wheel (23), based on a difference between a vehicle speed at a point on the front wheel (8) and the point on the rear wheel (23) that occurs due to a difference between a locus of travel of the front wheel (8) and a locus of travel of the rear wheel (23), and on the wheel speed V f of the front wheel (8).
摘要:
A driving force control system is for use in a vehicle including a centrifugal clutch. The centrifugal clutch includes an upstream member mechanically connected to an engine to rotate, and a downstream member to be mechanically connected with or disengaged from the upstream member based on a centrifugal force occurring in accordance with rotation of the upstream member. The centrifugal clutch automatically turns ON or OFF transmission of motive power between an upstream-of-centrifugal-clutch path from the engine to the upstream member and a downstream-of-centrifugal-clutch path from the downstream member to a driving wheel, with a centrifugal force which is in accordance with rotation of the upstream member. The present system exerts control so that, in a state in which the driving wheel is slipping, a reduction rate in rotation speed under non-connection concerning the upstream-of-centrifugal-clutch path is smaller than a reduction rate in rotation speed under connection concerning the upstream-of-centrifugal-clutch path, thereby adjusting slipping of the driving wheel.
摘要:
The purpose of the present invention is to provide a vehicle drive system that can improve drive efficiency while maintaining vehicle stability. The drive state switching unit (64) comprises: a step (S3, S105) in which a switch is made from 2WD to AWD on the basis of a cumulative slip point; a step (S12, S303) in which a switch is made from 2WD to AWD on the basis of a calculated lateral G; a step (S13, S109, S111) in which a switch is made from AWD to 2WD after the step (S3 or S105) under a first switching condition; and a step (S13, S306, S308) in which a switch is made from AWD to 2WD after the step (S12 or S303) under a second switching condition. The first switching condition and the second switching condition are made to differ from one another.
摘要:
A method for controlling regenerative braking for a vehicle provided with a first regenerative braking means, and a second braking means separate from the first braking means, the vehicle comprising at least one first wheel, and at least one second wheel, the second braking means applying to said at least one first wheel and to said at least one second wheel, and the first braking means applying only to said at least one first wheel, the method comprising: estimating (31) a value of a parameter representative of the sliding linked to the regenerative braking on the basis of the speed value of the first wheel, and on the basis of the speed value of the second wheel, and generating (32, 33) a regenerative braking setpoint value on the basis of the estimated value of the parameter representative of sliding linked to the regenerative braking.
摘要:
An ECU is formed of an ABS control device for controlling operation of a braking device when a slip ratio of wheels FR to RL becomes greater than a threshold, an automatic brake control device that controls operation of the braking device based on information on surroundings of the vehicle, and the threshold changing device that changes the threshold at which the braking device is activated by the ABS control device so that the threshold when the braking device is being operated by the automatic brake control device is smaller than the threshold when the braking device is not being operated by the automatic brake control device.
摘要:
An ECU is formed of an ABS control device for controlling operation of a braking device when a slip ratio of wheels FR to RL becomes greater than a threshold, an automatic brake control device that controls operation of the braking device based on information on surroundings of the vehicle, and the threshold changing device that changes the threshold at which the braking device is activated by the ABS control device so that the threshold when the braking device is being operated by the automatic brake control device is smaller than the threshold when the braking device is not being operated by the automatic brake control device.
摘要:
Computing sections (31, 32) compute an average front-wheel speed VwF=(VwFL+VwFR)/2 and an average rear wheel speed VwR=(VwRL+VwRR)/2, and then the resulting values (VwF and VwR) are passed through band-pass filtering sections (33, 34) to extract only a component near a vehicle body resonance frequency, respectively, thus acquiring a vibration component (fVwF) of the front wheel speed (VwF) near the vehicle body resonance frequency and a vibration component (fVwR) of the rear wheel speed (VwR) near the vehicle body resonance frequency, the vibration components being representative of a vehicle body vibration. Computing sections (35, 36) are adapted to determine, from the resulting values (fVwF and fVwR), a back-and-forth displacement (Xtf) of the front wheels and a back-and-forth displacement (Xtr) of the rear wheels, the dis placements being representative of the vehicle body vibration; to determine, from the resulting values (Xtf and Xtr), the up-and-down dis placement of a portion above a front axle and the up-and-down displacement of a portion above a rear axle, the up-and-down displacements being caused by the vehicle body vibration, on the basis of the inherent relations between the back-and-forth displacement and the up-and-down displacement of the front wheels and the rear wheels, the relations being determined by the geometry of a suspension; to estimate the vehicle body vibration (an up-and-down bounce speed (dZv) and a pitch angular velocity (d8p)) from the front and rear up-and-down displacements of the vehicle body; and to determine an amount of driving and braking force compensation (L'i Td) which is necessary to alleviate the vehicle body vibration.