Abstract: A driving assistance apparatus is capable of executing steering control that includes steering assistance or automatic steering of a vehicle. The driving assistance apparatus includes: an influence information acquisition unit configured to acquire influence information including information on a road affected by irregularities on the road; a proposal information presentation unit configured to present proposal information related to suspension of the steering control to an occupant of the vehicle when the influence information on road affected by irregularities present along a path of the vehicle is acquired during execution of the steering control; and a steering control unit configured to suspend a part or all of the steering control based on a suspending operation of the steering control from the occupant.

Abstract: An electric vehicle is provided with an electric motor serving as a driving source and is not provided with an internal combustion engine from which power is transmitted to drive wheels driven by power from the electric motor. The electric vehicle includes: a torque converter that is disposed coaxially with an output shaft of the electric motor, and to which the power is transmitted from the electric motor; an automatic transmission disposed on a power transmission path between the electric motor and the drive wheels, and configured to achieve a shift stage at which the power is interrupted; and a mechanical oil pump driven by the power from the electric motor, and disposed on the power transmission path, at a position upstream of the automatic transmission in a direction of power transmission from the electric motor to the drive wheels. The mechanical oil pump is disposed in the electric motor.

Abstract: A hybrid vehicle includes: an engine including an output shaft configured to output a power; a damper placed on a first axis that is the same axis as the output shaft; a rotating machine placed on the first axis; a torque converter placed on the first axis; a transmission mechanism placed so that an input shaft of the transmission mechanism is positioned on a second axis that is an axis different from the first axis; a case in which the rotating machine and the transmission mechanism are accommodated; driving wheels attached to drive shafts; and an oil accumulated in a lower part of a space surrounded by the case and used for lubrication of the transmission mechanism, the oil being in contact with a part of the rotating machine.

Abstract: A torsional vibration damper having enhanced vibration damping performance is provided. The torsional vibration damper comprises: a vacant area existing between an outer circumference of the sun gear and an inner circumference of the ring gear outside of a revolving range of the planetary gears revolved as a result of relative rotation between the sun and the ring gear; and a mass increasing portion that is formed on the rotary member other than an input element and an output element within the vacant area in such a manner as to protrude from the rotary member.

Abstract: A torsional vibration damper in which noise and vibrations in a planetary gear unit are suppressed is provided. In a planetary gear unit, as an inertial element is oscillated to establish an inertial torque by a relative rotation between a sun gear and a ring gear. Pinion gears are interposed between the sun gear and the ring gear at predetermined intervals, and gear dimensions of one of the pinion gears and gear dimensions of another one of the pinion gears are different from each other.

Abstract: An electric vehicle is provided with an electric motor serving as a driving source and is not provided with an internal combustion engine from which power is transmitted to drive wheels driven by power from the electric motor. The electric vehicle includes: a torque converter that is disposed coaxially with an output shaft of the electric motor, and to which the power is transmitted from the electric motor; an automatic transmission disposed on a power transmission path between the electric motor and the drive wheels, and configured to achieve a shift stage at which the power is interrupted; and a mechanical oil pump driven by the power from the electric motor, and disposed on the power transmission path, at a position upstream of the automatic transmission in a direction of power transmission from the electric motor to the drive wheels. The mechanical oil pump is disposed in the electric motor.

Abstract: There is provided a vibration damper which is capable of damping torsional vibrations by pendulum movement of a plurality of inertial masses, and damping vibrations of plurality of order without letting the inertial masses to interfere. A distance between a center of curvature of an inner surface of a first through-hole and a center of curvature of an inner surface of a second through-hole formed in a rotary member is shorter than a distance between a center of curvature of an inner surface of a fifth through-hole and a center of curvature of an inner surface of a sixth through-hole formed in a first inertial mass. Moreover, a distance between a center of curvature of an inner surface of a third through-hole and a center of curvature of an inner surface of a fourth through-hole in a rotary member is longer than a distance between a center of curvature of an inner surface of a seventh through-hole and a center of curvature of an inner surface of an eighth through-hole formed in a second inertial mass.

Abstract: A hybrid vehicle includes: an engine including an output shaft configured to output a power; a damper placed on a first axis that is the same axis as the output shaft; a rotating machine placed on the first axis; a torque converter placed on the first axis; a transmission mechanism placed so that an input shaft of the transmission mechanism is positioned on a second axis that is an axis different from the first axis; a case in which the rotating machine and the transmission mechanism are accommodated; driving wheels attached to drive shafts; and an oil accumulated in a lower part of a space surrounded by the case and used for lubrication of the transmission mechanism, the oil being in contact with a part of the rotating machine.

Abstract: A torsional vibration damper having enhanced vibration damping performance is provided. The torsional vibration damper comprises: a vacant area existing between an outer circumference of the sun gear and an inner circumference of the ring gear outside of a revolving range of the planetary gears revolved as a result of relative rotation between the sun and the ring gear; and a mass increasing portion that is formed on the rotary member other than an input element and an output element within the vacant area in such a manner as to protrude from the rotary member.

Abstract: A vibration damping device in which vibration damping performance of a damper having a chamber holding a rolling member is improved. The vibration damping device is adapted to damp vibrations resulting from a pulsation of torque applied to a rotary member by an oscillating motion of a rolling member connected with the rotary member while being allowed to rotate relatively therewith. The vibration damping device is provided with a casing member enclosing the rolling member, and a sealing member that connects the casing member with the rotary member in a manner such that the rotary member is allowed to rotate relatively with the casing member, while preventing oil from entering into an inner space of the casing member where the rolling member is held to oscillate.

Abstract: To prevent response delay and to damp torsional vibration transmitted to a power transmission route. A vibration damper includes a first route R1 provided with a coil spring 43 as an elastic member, and a second route R2 provided with a sun gear 5s as an inertial body formed to be parallel as power transmission routes between an engine 10 to a transmission 20, and by switching the first route R1 and the second route R2 by a first clutch C1 and a second clutch C2, switchover to a state in which an inertial torque acts on the power transmission route by the sun gear 5s and a state in which the inertial torque is not generated is carried out.

Abstract: A torsional vibration damper having enhanced vibration damping performance is provided. The torsional vibration damper comprises: a vacant area existing between an outer circumference of the sun gear and an inner circumference of the ring gear outside of a revolving range of the planetary gears revolved as a result of relative rotation between the sun and the ring gear; and a mass increasing portion that is formed on the rotary member other than an input element and an output element within the vacant area in such a manner as to protrude from the rotary member.

Abstract: A torsional vibration damper in which noise and vibrations in a planetary gear unit are suppressed is provided. In a planetary gear unit, as an inertial element is oscillated to establish an inertial torque by a relative rotation between a sun gear and a ring gear. Pinion gears are interposed between the sun gear and the ring gear at predetermined intervals, and gear dimensions of one of the pinion gears and gear dimensions of another one of the pinion gears are different from each other.

Abstract: To prevent response delay and to damp torsional vibration transmitted to a power transmission route. A vibration damper includes a first route R1 provided with a coil spring 43 as an elastic member, and a second route R2 provided with a sun gear 5s as an inertial body formed to be parallel as power transmission routes between an engine 10 to a transmission 20, and by switching the first route R1 and the second route R2 by a first clutch C1 and a second clutch C2, switchover to a state in which an inertial torque acts on the power transmission route by the sun gear 5s and a state in which the inertial torque is not generated is carried out.

Abstract: There is provided a vibration damper which is capable of damping torsional vibrations by pendulum movement of a plurality of inertial masses, and damping vibrations of plurality of order without letting the inertial masses to interfere. A distance between a center of curvature of an inner surface of a first through-hole and a center of curvature of an inner surface of a second through-hole formed in a rotary member is shorter than a distance between a center of curvature of an inner surface of a fifth through-hole and a center of curvature of an inner surface of a sixth through-hole formed in a first inertial mass. Moreover, a distance between a center of curvature of an inner surface of a third through-hole and a center of curvature of an inner surface of a fourth through-hole in a rotary member is longer than a distance between a center of curvature of an inner surface of a seventh through-hole and a center of curvature of an inner surface of an eighth through-hole formed in a second inertial mass.

Abstract: A controller is configured to obtain a speed ratio equivalent value that is determined by a speed ratio set in a transmission unit, and is configured to control an engine by setting an operating point of the engine such that the operating point in the case where a lockup clutch is engaged and the speed ratio equivalent value is large is lower in an output rotation speed for a predetermined output torque than the operating point in the case where the lockup clutch is engaged and the speed ratio equivalent value is smaller than the large speed ratio equivalent value.

Abstract: A vibration damping device having improved air-tightness of a chamber holding a rolling mass in an oscillatable manner is provided. A cover member that covers an oscillating range of the rolling mass liquid-tightly or air-tightly comprises a first flange and a second flange. The first flange is pushed onto one of lateral faces of a holding member by a first pushing member fitted onto a rotary member while being prevented to move axially to seal a clearance between the holding member and the first flange by a first sealing member. The second flange is pushed onto the other lateral face of the holding member by a second pushing member fitted onto the rotary member while being prevented to move axially to seal a clearance between the holding member and the second flange by a second sealing member.

Abstract: A vibration damping device in which a covering member can be fixed firmly to a rotary member by a rivet is provided. In the vibration damping device, a pendulum mass 14 is held in a rotary member 15, and a casing 17 is fixed to the rotary member 15 by a rivet 20. The rivet 20 comprises a head 20a, a first shaft 20b and a second shaft 20c. The first shaft 20a penetrates through a first casing member 18, the rotary member 15 and the second casing member 19, and a tail thereof is expanded to fasten those members. The second shaft 20c penetrates through a driven member, and a tail thereof is expanded to fasten the driven member to the rotary member 15.

Abstract: A torsional vibration damper having enhanced vibration damping performance is provided. The torsional vibration damper comprises: a vacant area existing between an outer circumference of the sun gear and an inner circumference of the ring gear outside of a revolving range of the planetary gears revolved as a result of relative rotation between the sun and the ring gear; and a mass increasing portion that is formed on the rotary member other than an input element and an output element within the vacant area in such a manner as to protrude from the rotary member.

Abstract: A vibration damping device having improved air-tightness of a chamber holding a rolling mass in an oscillatable manner is provided. A cover member that covers an oscillating range of the rolling mass liquid-tightly or air-tightly comprises a first flange and a second flange. The first flange is pushed onto one of lateral faces of a holding member by a first pushing member fitted onto a rotary member while being prevented to move axially to seal a clearance between the holding member and the first flange by a first sealing member. The second flange is pushed onto the other lateral face of the holding member by a second pushing member fitted onto the rotary member while being prevented to move axially to seal a clearance between the holding member and the second flange by a second sealing member.