AUTOMATIC TRANSMISSION CONTROLLER

摘要

An automatic transmission controller for controlling an automatic transmission includes an idling reduction controller, an idling-reduction-control permission determiner, and an engagement controller. The idling-reduction-control permission determiner is configured to determine whether or not to permit an idling reduction control. The engagement controller, in a case where the idling-reduction-control permission determiner permits the idling reduction control, is configured to allow rotation of an input shaft of an automatic transmission, and in a case where an output shaft of the automatic transmission is rotated by a wheel of a vehicle in a rotational direction such that the vehicle moves backward, is configured to set a plurality of engagement mechanisms including at least a mechanical engagement mechanism so as to fix the output shaft of the automatic transmission to a casing of the automatic transmission or so as to prevent the vehicle from moving backward.

主权项

1. An automatic transmission controller for controlling an automatic transmission that transmits a driving force from an internal combustion engine to a wheel of a vehicle while shifting the driving force by selecting a gear ratio from a plurality of gear ratios in accordance with a driving state of the vehicle,
the automatic transmission including
a starting mechanism connected to the internal combustion engine,a plurality of planetary gear mechanisms each including rotation elements that are a sun gear, a carrier, and a ring gear, anda plurality of engagement mechanisms that connect or hold fixed the rotation elements of the planetary gear mechanisms and that set the plurality of gear ratios of the automatic transmission by means of a combination of engagements between the plurality of engagement mechanisms and the rotation elements, one of the plurality of engagement mechanisms being a mechanical engagement mechanism that permits switching of a rotational direction of one of the rotation elements of the plurality of planetary gear mechanisms, the automatic transmission controller comprising: an idling reduction controller that performs idling reduction control in which the mechanical engagement mechanism is operated to switch rotational directions for a forward gear and a reverse gear and to allow rotation in each of the forward gear and the reverse gear and in which the internal combustion engine is stopped; an idling-reduction-control permission determiner that determines whether or not to permit the idling reduction control; and an engagement controller that, when the idling-reduction-control permission determiner permits the idling reduction control, allows rotation of an input shaft of the automatic transmission, and that, in a case where an output shaft of the automatic transmission is rotated by a wheel of the vehicle in a rotational direction such that the vehicle moves backward, sets the plurality of engagement mechanisms including at least the mechanical engagement mechanism so as to fix the output shaft of the automatic transmission to a casing of the automatic transmission or so as to prevent the vehicle from moving backward.