Drive assist device, and drive assist method
First Claim
1. A drive assist device comprising:
- an ECU configured to;
calculate an index relating to a relative relationship between a vehicle and a target object;
determine whether to execute a drive assist control of the vehicle based on the index; and
control, in response to the ECU executing the drive assist control, the vehicle to perform at least one from among avoiding the target object and stabilizing a behavior of the vehicle,wherein, in a case where a lateral sensed approach, which is expressed by a ratio of the vehicle width direction component of a relative speed between the vehicle and the target object and the vehicle width direction component of the relative distance, is smaller than a predetermined threshold value, the ECU is configured to calculate the index using below-described Equation (1)
T_PRE={(V+B·
Ax)+K1·
Vd}/{L+K2·
D}
(1), andwherein, in a case where the lateral sensed approach is equal to or greater than the predetermined threshold value, the ECU is configured to calculate the index using below-described Equation (2)
T_PRE=(V+B·
Ax)/L
(2)wherein in the Equations (1) and (2), T_PRE is the index, V is the vehicle travelling direction component of the relative speed, Vd is the vehicle width direction component of the relative speed, Ax is a deceleration of the vehicle, L is the vehicle travelling direction component of the relative distance, D is the vehicle width direction component of the relative distance, B is a predetermined coefficient, and K1 and K2 are arbitrary coefficients.
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Accused Products
Abstract
According to an embodiment, there is provided a drive assist device including an index calculation unit configured to calculate an index relating to a relative relationship between a vehicle and a target object and a drive assist determination unit configured to determine whether to execute a drive assist control of the vehicle based on the index and as the vehicle width direction component of the relative speed between the vehicle and the target object decreases, the index calculation unit calculates the index with increasing a degree of influence of the relative relationship relating to the vehicle width direction component, or as the vehicle width direction component of the relative distance between the vehicle and the target object increases, the index calculation unit calculates the index with increasing the degree of influence of the relative relationship relating to the vehicle width direction component.
6 Citations
16 Claims
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1. A drive assist device comprising:
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an ECU configured to; calculate an index relating to a relative relationship between a vehicle and a target object; determine whether to execute a drive assist control of the vehicle based on the index; and control, in response to the ECU executing the drive assist control, the vehicle to perform at least one from among avoiding the target object and stabilizing a behavior of the vehicle, wherein, in a case where a lateral sensed approach, which is expressed by a ratio of the vehicle width direction component of a relative speed between the vehicle and the target object and the vehicle width direction component of the relative distance, is smaller than a predetermined threshold value, the ECU is configured to calculate the index using below-described Equation (1)
T_PRE={(V+B·
Ax)+K1·
Vd}/{L+K2·
D}
(1), andwherein, in a case where the lateral sensed approach is equal to or greater than the predetermined threshold value, the ECU is configured to calculate the index using below-described Equation (2)
T_PRE=(V+B·
Ax)/L
(2)wherein in the Equations (1) and (2), T_PRE is the index, V is the vehicle travelling direction component of the relative speed, Vd is the vehicle width direction component of the relative speed, Ax is a deceleration of the vehicle, L is the vehicle travelling direction component of the relative distance, D is the vehicle width direction component of the relative distance, B is a predetermined coefficient, and K1 and K2 are arbitrary coefficients. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13)
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14. A drive assist device comprising:
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an ECU configured to; determine a first recommended operation timing that indicates a timing at which a first driving operation to change a behavior of a vehicle is performed based on an index relating to a relative relationship between the vehicle and a target object; estimate, at a timing earlier than the first recommended operation timing, whether a driver of the vehicle performs the first driving operation at the first recommended operation timing; determine to execute the drive assist of the vehicle in a case where it is estimated that the driver does not perform the first drive operation at the first recommended operation timing; control, in response to the ECU executing the drive assist control, the vehicle to perform at least one from among avoiding the target object and stabilizing a behavior of the vehicle, wherein, the ECU is configured to make the first recommended operation timing such that the first recommended operation timing becomes early as a vehicle width direction component of the relative speed between the vehicle and the target object decreases or the vehicle width direction component of the relative distance between the vehicle and the target object increases, wherein, in a case where the lateral sensed approach is smaller than a predetermined threshold value, the index is calculated using following Equation (1),
T_PRE={(V+B·
Ax)+K1·
Vd}/{L+K2·
D}
(1), andwherein, in a case where a lateral sensed approach, which is expressed by a ratio of the vehicle width direction component of a relative speed between the vehicle and the target object and the vehicle width direction component of the relative distance, is equal to or greater than the predetermined threshold value, the ECU is configured to calculate the index using following Equation (2),
T_PRE=(V+B·
Ax)/L
(2)wherein in the Equations (1) and (2), T_PRE is the index, V is the vehicle travelling direction component of the relative speed, Vd is the vehicle width direction component of the relative speed, Ax is a deceleration of the vehicle, L is the vehicle travelling direction component of the relative distance, D is the vehicle width direction component of the relative distance, B is a predetermined coefficient, and K1 and K2 are arbitrary coefficients. - View Dependent Claims (15, 16)
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Specification