A barrier door for a protective enclosure includes a lower section and an upper section operably coupled with the lower section, and a ventilation system disposed within the lower section. The ventilation system includes one or more blowers and a plenum. The ventilation system is configured to direct air one or more of into or out of the protective enclosure.

A parallel hybrid drive train, in particular for a working machine, includes an internal combustion engine (1), an electrical machine (2) and hydraulic aggregates (3, 4, 5, 9) for driving working devices (6-8) and for moving the working machine. In order to increase the efficiency, the rotational speed of the internal combustion engine is lowered, that is to say the load point is moved. Increased power requirements are detected via a driver input and provide a desired rotational speed. The electrical machine assists the acceleration of the internal combustion engine to said desired rotational speed.

A machine is disclosed. The machine may include a control system that includes a controller configured to: determine a center of gravity of the machine based on a state of the machine; determine at least one of a slope limit or a pitch limit for the machine based on the center of gravity; receive a command to perform an operation that, if performed, would affect at least one of a slope or a pitch of the machine; determine whether the operation, if performed, would cause the machine to exceed the at least one of the slope limit or the pitch limit; and selectively perform the operation based on determining whether the operation, if performed, would cause the machine to exceed the at least one of the slope limit or the pitch limit.

A machine is disclosed. The machine may include at least one of a propulsion system or a steering system configured to operate under automatic control in an autonomous mode of the machine; and a controller configured to obtain one or more parameters associated with a task that is to be performed in the autonomous mode, determine an estimated completion time for the task based on the one or more parameters associated with the task, and perform one or more actions based on the estimated completion time for the task.

A system and method are disclosed for retrofitting mechanical workover rigs with electric motors to create a hybrid mechanical and electric drive. The process involves the replacement of the combustion engine with one or more electric motors to drive various components of the rig. The retrofit design allows for cleaner, more precise, and more efficient operations while eliminating the need for hydrocarbons as fuel and thus reducing associated greenhouse gas emissions. It also enables the installation of a computer control which, among other benefits, allows more precise control of the rig's operations than is possible with a mechanical transmission. The electric motors may be driven by a battery energy storage system.

A system for proactively controlling rimpull limit of a machine includes a hydraulic system having a lift cylinder to move an implement; a lift cylinder pressure sensor that senses a hydraulic pressure of the lift cylinder and responsively produces a lift cylinder pressure signal; and a controller in operable communication with the power train and the lift cylinder pressure sensor. The controller is configured to receive the lift cylinder pressure signal; determine the rimpull limit based at least in part upon the lift cylinder pressure signal; and adjust the torque of the power train to the rimpull limit.

An automatic control mode system for heavy machinery and a method for controlling heavy machinery for an automatic control mode is disclosed. The method may include: monitoring one or more conditions of one or more systems of the heavy machinery for the automatic control mode; determining whether at least one of the one or more conditions is met; and disabling the automatic control mode if at least one of the one or more conditions are met.

A paving machine is described. The paving machine includes a powertrain with a power unit. The power unit may include a diesel generator and a battery. The powertrain may also include one or more drivetrains. The drivetrains may include a hydraulic drivetrain and an electric drivetrain. The drivetrains may receive power from the power unit for supplying power to actuators of the hydraulic drivetrain and the electric drivetrain. The paving machine may be a curb-forming machine including the battery, the hydraulic drivetrain, and the electric drivetrain. The hydraulic drivetrain of the curb-forming machine may include a cylinder, crawler, steering assembly, and auger, and the electric drivetrain may include a vibrator. The paving machine may also include a number of other types of paving machines. Where the paving machine includes the hydraulic drivetrain, a buffer may be provided to ensure sufficient hydraulic power in response to demand changes.

A traffic planning method for controlling a plurality of vehicles is disclosed, wherein each vehicle occupies one node in a shared set of planning nodes and is movable to other nodes along predefined edges between pairs of the nodes in accordance with a finite set of motion commands. The method comprises: obtaining initial node occupancies of the vehicles; from said finite set of motion commands, determining a mean number of feasible motion commands in a neighborhood of the initial node occupancies; determining a search depth d which makes optimal use of a predefined computational budget; and determining a suitable sequence of motion commands by means of an optimization process which considers the search depth d.

A system for controlling an engagement operation between first and second movable machines includes a separation sensor, a relative speed sensor and a controller. The separation sensor determines a separation distance between the first and second machines. The relative speed sensor determines a relative difference in speed between the first and second machines. The controller determines the separation distance between the first and second machines, decelerates the first movable machine when the separation distance is within a deceleration zone, determines a relative difference in speed between the first and second machines, and generates an engagement speed command to operate the first movable machine at a first ground speed equal to a second ground speed of the second movable machine plus a relative engagement speed when the separation distance is within a buffer zone.