Abstract: A controller in a vehicle seat system is configured to execute a first pivot control to cause the second seatback to pivot at a first pivoting speed, a second pivot control to cause the second seatback to pivot at a second pivoting speed that is greater than the first pivoting speed, and a first determination process to determine, during execution of a tilt control, whether the second seatback will interfere with the first seatback. If the controller determines, during execution of the tilt control, that the second seatback will interfere with the first seatback, then the controller causes the first seatback to pivot and executes the first pivot control in at least a part of a pivoting process of the second seatback.

Abstract: Disclosed is one example of a vehicle seat system that is capable of shortening a time duration required until a third-row seat becomes available for boarding or deboarding. During execution of boarding or deboarding mode-conversion process, executed are front seat-pivot in which a first seatback is displaced seat-frontward in a pivoting manner; a first operation in which at least one of a second seat cushion or a second seatback is displaced relative to the other of the second seat cushion or the second seatback so that the second seat cushion faces the second seatback; and a second operation in which the second seat is displaced seat-frontward. During the execution of the boarding or deboarding mode-conversion process, the second operation is executed in response to the first seatback being placed in a specified state subsequent to execution of the front seat-pivot.

Abstract: A seat adjuster in one aspect of the present disclosure comprises a rotating part, a rotational drive, an engagement target member, an engagement member, and a controller. The controller executes a lock transition process in a case where a seatback is pivotally moved to a specified front-tilt position, which is further to a forward direction than an upright position is, while the engagement member is in an unlocked state where the engagement member is not engaged with any one of engagement target portions of the engagement target member. The lock transition process is a process where the controller rotates the rotating part via the rotational drive such that one of the engagement target portions is placed at an engageable position, and engages the engagement member with the one of the engagement target portions.

Abstract: A controller in a vehicle seat system is configured to execute a first pivot control to cause the second seatback to pivot at a first pivoting speed, a second pivot control to cause the second seatback to pivot at a second pivoting speed that is greater than the first pivoting speed, and a first determination process to determine, during execution of a tilt control, whether the second seatback will interfere with the first seatback. If the controller determines, during execution of the tilt control, that the second seatback will interfere with the first seatback, then the controller causes the first seatback to pivot and executes the first pivot control in at least a part of a pivoting process of the second seatback.

Abstract: A seat adjuster in one aspect of the present disclosure comprises a rotating part, a rotational drive, an engagement target member, an engagement member, and a controller. The controller executes a lock transition process in a case where a seatback is pivotally moved to a specified front-tilt position, which is further to a forward direction than an upright position is, while the engagement member is in an unlocked state where the engagement member is not engaged with any one of engagement target portions of the engagement target member. The lock transition process is a process where the controller rotates the rotating part via the rotational drive such that one of the engagement target portions is placed at an engageable position, and engages the engagement member with the one of the engagement target portions.

Abstract: A vehicle seat adjustment device mounted on a vehicle in which a plurality of seats including a last-row seat in a last row and a second-to-last-row seat in a second-to-last row is arranged in a front and rear direction and configured to adjust states of the last-row seat and the second-to-last-row seat. When respectively shifting the last-row seat and the second-to-last-row seat to their accommodation states by operating an operation part, the first drive part and the second drive part are controlled so that there is a period during which a seat back of the last-row seat and a seat back of the second-to-last-row seat are simultaneously rotated forward.