Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: identify a speed reduction ratio in a driving force transmission mechanism; estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that the average torque output by the engine and an engine speed are constant, to set the countertorque such that, as the speed reduction ratio becomes smaller, the absolute value of the countertorque becomes larger.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that the average torque output by the engine is constant, to set the countertorque such that, as an engine speed of the engine becomes larger, the absolute value of the countertorque becomes larger.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: identify a vehicle acceleration; estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed and the average torque output by the engine are constant, to set the countertorque such that, as the absolute value of the vehicle acceleration becomes smaller, the absolute value of the countertorque becomes larger.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed is constant, to set the countertorque such that, as the average torque output by the engine becomes larger, the absolute value of the countertorque becomes larger.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under the condition that the average torque output by the internal combustion engine is constant, to set a negative control gain such that, as an engine speed becomes higher, the absolute value of the control gain becomes smaller, and then to set the countertorque based on a product of the estimated torque fluctuation component and the control gain.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed is constant, to set the countertorque such that, as the average torque output by an engine becomes larger, the absolute value of the countertorque becomes smaller.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: identify a speed reduction ratio in a driving force transmission mechanism; estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that the average torque output by the engine and an engine speed are constant, to set the countertorque such that, as the speed reduction ratio becomes smaller, the absolute value of the countertorque becomes larger.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under the condition that the average torque output by the internal combustion engine is constant, to set a negative control gain such that, as an engine speed becomes higher, the absolute value of the control gain becomes smaller, and then to set the countertorque based on a product of the estimated torque fluctuation component and the control gain.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed is constant, to set the countertorque such that, as the average torque output by an engine becomes larger, the absolute value of the countertorque becomes smaller.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed is constant, to set the countertorque such that, as the average torque output by the engine becomes larger, the absolute value of the countertorque becomes larger.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that the average torque output by the engine is constant, to set the countertorque such that, as an engine speed of the engine becomes larger, the absolute value of the countertorque becomes larger.

Abstract: Provided are a driving force control method and device for a hybrid vehicle, each capable of effectively absorbing torque fluctuation of an engine while suppressing deterioration in energy efficiency. The driving force control device for a hybrid vehicle comprises a PCM configured to: identify a vehicle acceleration; estimate an average torque output by an engine; estimate a torque fluctuation component of the torque output by the engine; set a countertorque for suppressing the estimated torque fluctuation component; and control an electric motor to output the set countertorque, wherein the PCM is operable, under a condition that an engine speed and the average torque output by the engine are constant, to set the countertorque such that, as the absolute value of the vehicle acceleration becomes smaller, the absolute value of the countertorque becomes larger.

Abstract: Provided is a shovel including a swiveling motor, and a swiveling speed reducer that reduces the rotational speed of an output shaft of the swiveling motor. The swiveling speed reducer includes a first gear mechanism; a first gear case that houses the first gear mechanism; a first oil check pipe that is disposed in the first gear case; a first communication portion that allows an inside of the first gear case and the first oil check pipe to communicate with each other; and a second communication portion that connects a position of the first gear case higher than a position where the first communication portion is connected, and a high position of the first oil check pipe.

Abstract: A shovel includes: a speed reducer configured by stacking a plurality of gear speed reducers each having a sun gear, a planetary gear, an internal gear, and a carrier member supporting the planetary gear provided in a case, in a direction of an axis of rotation of an upper turning body; and a movement restriction section which is provided between the sun gear of one gear speed reducer among the gear speed reducers stacked in a plurality and another gear speed reducer stacked so as to face the sun gear and restricts movement of the sun gear of the one gear speed reducer toward the other gear speed reducer, wherein the movement restriction section is provided at the case.

Abstract: A shovel includes: a speed reducer configured by stacking a plurality of gear speed reducers each having a sun gear, a planetary gear, an internal gear, and a carrier member supporting the planetary gear provided in a case, in a direction of an axis of rotation of an upper turning body; and a movement restriction section which is provided between the sun gear of one gear speed reducer among the gear speed reducers stacked in a plurality and another gear speed reducer stacked so as to face the sun gear and restricts movement of the sun gear of the one gear speed reducer toward the other gear speed reducer, wherein the movement restriction section is provided at the case.

Abstract: Provided is a shovel including a swiveling motor, and a swiveling speed reducer that reduces the rotational speed of an output shaft of the swiveling motor. The swiveling speed reducer includes a first gear mechanism; a first gear case that houses the first gear mechanism; a first oil check pipe that is disposed in the first gear case; a first communication portion that allows an inside of the first gear case and the first oil check pipe to communicate with each other; and a second communication portion that connects a position of the first gear case higher than a position where the first communication portion is connected, and a high position of the first oil check pipe.