A method and a system for shifting a gear of a hybrid electric vehicle are provided. The method includes following steps. A state of a battery is determined according to a remaining capacity of the battery, a required torque and a state of the hybrid electric vehicle, in which the state of the battery comprises a discharging state or a charging state. A plurality of optional target gears, a torque and a rotating speed of an engine corresponding to each optional target gear are determined according to the state of the battery and a speed of the hybrid electric vehicle. An optional target gear with a minimum fuel consumption of the engine is selected as a target gear from the plurality of optional target gears. It is determined whether to perform a gear shift by comparing with a current gear.

In a work vehicle according to the present invention, a control device calculates, for each of a plurality of speed-changing stages in a PTO transmission, an expected maximum rotational speed of PTO rotary power that is output from the PTO shaft when an engine rotational speed changing operation member is operated to a maximum extent, and shows, in a listed manner, the calculated results in a liquid crystal display part of a display device. The present invention can inform an operator of the maximum rotational speed of PTO rotary power that is output from the PTO shaft for each speed-changing stage in the PTO transmission without performing a speed changing operation on the PTO transmission.

Methods, apparatuses, and systems for determining a dynamic shift schedule for a system are provided. A method includes: determining, by a controller, a priority for a system based on data indicative of operation of the system; determining, by the controller, a shift point for the system based on the priority and at least one of a current gear, a current accelerator pedal position (APP), an acceleration vector, or a target gear; and taking, by the controller, an action based on the determined shift point.

A transmission associated with a powertrain receives torque from a power source and includes a plurality of gear sets that can be selectively engaged and released. To shift gear sets, a shifting process conducted by an electronic controller may estimate a torque assist capacity of the power source to provide or accommodate changes in torque during the gear shift. If the torque assist capacity is less than a gear shift torque value, the shifting process prevents or ignores the gear shift.

A transmission associated with a powertrain receives torque from a power source and includes a plurality of gear sets that can be selectively engaged and released. To shift gear sets, a shifting process conducted by an electronic controller may estimate a torque assist capacity of the power source to provide or accommodate changes in torque during the gear shift. If the torque assist capacity is less than a gear shift torque value, the shifting process prevents or ignores the gear shift.