Nissan Motor Company Limited

Mitsunori Ohta

Takeshi Kimura

Tatsuya Suzuki

Yuuki Shiozawa

Yosuke Kobayashi

Akihiro Itoh

Masahiko Yoshizawa

Hiroki Sasaki

Satoshi Ota

Naoki Miyashita

Taku Suzuki

Tomoyuki Kashiwaya

Ikuma Shindo

Katsuaki Kubotera

Tastuya Suzuki

A magnitude of a road surface slope along which a vehicle travels is detected, when the magnitude of the road surface slope increases, a basic braking force set in advance is corrected to be decreased based on the magnitude of the road surface slope, or a basic driving force set in advance is corrected to be increased based on the magnitude of the road surface slope, when the magnitude of the road surface slope decreases, a basic braking force is corrected to be increased based on the magnitude of the road surface slope or a basic driving force is corrected to be decreased based on the magnitude of the road surface slope, and the corrected braking force or driving force is generated.

Braking/driving force control method and braking/driving force control device

A method for controlling a vehicle that includes a motor configured to provide a driving/braking force to the vehicle and a friction braking mechanism configured to provide a friction brake force to the vehicle includes a target calculation step of calculating a target torque of the motor in accordance with a displacement of an accelerator pedal, a gradient estimation step of estimating a gradient torque to cancel a disturbance due to a gradient of a road surface where the vehicle is travelling, a command calculation step of calculating a torque command value of the motor based on the gradient torque and the target torque, a control step of controlling a torque of the motor in accordance with the torque command value, and a stop control step.

Vehicle control device and control method

When a driver demand torque is not greater than a target braking/driving torque, the acceleration/deceleration of the vehicle is controlled depending on the target braking/driving torque, when the driver demand torque exceeds the target braking/driving torque, the acceleration/deceleration is controlled depending on the driver demand torque, when the accelerator pedal operation amount decreases after the driver demand torque exceeds the target braking/driving torque, the driver demand torque is decreased depending on the decrease in the accelerator pedal operation amount, the decrease rate of the driver demand torque depending on the decrease in the accelerator pedal operation amount is set to be smaller than the decrease rate for a case where the driver does not set a travelling speed, and the acceleration/deceleration is controlled based on the set driver demand torque, and when the accelerator pedal operation amount becomes zero subsequently, the acceleration/deceleration is controlled depending on the target braking/driving torque.

A braking-driving force control system is provided in which erroneous vehicle speed detection may be avoided even when a frictional braking power is generated during rotation of an output shaft coupled to an electric driving motor as driving source. When only regenerative braking force is being generated as braking force while the vehicle is traveling, the braking force and the driving force are controlled based on an output shaft side vehicle speed calculated from the rotational state of an output shaft of a driving source, and when the frictional braking power is being generated while the vehicle is traveling, the braking force and the driving force will be controlled based on a wheel side vehicle speed representing the vehicle speed calculated from the rotational state of the vehicle wheel.

Braking-driving force control system and braking-driving force control method

A vehicle damping control apparatus is basically provided with a braking/accelerating torque generating component, a corrective torque calculating component, a corrective torque command value output component and a priority level setting component. The braking/accelerating torque generating component is configured to generate braking/accelerating torque in a wheel. The corrective torque calculating component is configured to calculate a corrective torque to suppress vehicle pitching vibration and vehicle bouncing vibration. The corrective torque command value output component is configured to output a corrective torque command value to the braking/accelerating torque generating component based on the corrective torque. The priority level setting component is configured to set a priority level for calculating the corrective torque command value such that vehicle bouncing vibration is suppressed with priority over vehicle pitching vibration.

Vehicle damping control apparatus

A vehicular vibration damping control apparatus calculates a correction torque to suppress vehicle body sprung vibration. In outputting a correction torque command to a driving/braking torque producing device, the control apparatus outputs a hunting time correction torque command smaller than a normal time correction toque command when a state in which amplitude of the correction torque is greater than or equal to a predetermined amplitude continues for a predetermined time length, and thereafter to return an output of the correction torque command from the hunting time correction torque command to the normal time correction torque command if a state in which the amplitude of the correction torque is smaller than or equal to the predetermined amplitude continues for a first predetermined time length. The frequency of performing the vibration damping control is increased by suppressing occurrence of hunting at the time of return to the normal vibration damping control.

Vibration-damping control device for vehicle

Risk and/or control status are presented in such a way that the vehicle driver can easily comprehend the fact. Upon detecting risk during driving a vehicle, the vehicle is controlled and information of at least one of the risk and the status of the vehicle being controlled is presented in visual form. In addition, the driver's initiative (D) in driving the vehicle is calculated (step S), and the visual form, in which the information is presented, is altered depending on the calculated driver's initiative (step S). When, for example, a lane departure prevention control works, the status of restraining lane departure is presented by arrow(s) in an anti-lane-departure direction opposite to the direction of lane departure. The size (including the length and the width) and color of the arrow(s) are altered depending on the initiative (D). Here, when the initiative (D) is at a low level, the arrow(s) is set in color, for example, 'red' and increased in size because the risk that the tendency of lane departure may increase becomes high.

Driver assistance system and driver assistance method

Predetermined weights are assigned, in accordance with a traveling state, to a first correction toque to suppress a sprung vibration of the vehicle in accordance with a wheel speed, and a second correction toque to suppress the sprung vibration of the vehicle in accordance with a driving/braking torque. With this configuration, it becomes possible to calculate the vibration suppressing torque corresponding to the traveling state.

Vibration-restraining control apparatus for vehicle

A correction torque command is outputted to a driving/braking torque producing means in accordance with a correction torque to suppress vehicle body spring vibration. When a state of the correction torque amplitude being greater than a predetermined amplitude continues for a given predetermined time, a control apparatus outputs a hunting time correction torque command smaller than a normal time correction toque command. When a state of the correction torque amplitude being smaller than or equal to the predetermined amplitude continues for a first predetermined time, the control apparatus returns the output of correction torque command from the hunting time correction torque command to the normal time correction torque command. The control apparatus continues the output of the hunting time correction torque command if the state in which the correction torque amplitude exceeds the predetermined amplitude continues for the given predetermined time, before the expiration of the first time period.

Growing community of inventors

Machida, Japan

Mitsunori Ohta