Abstract: A method of controlling machines for performing operations at a worksite is disclosed. The method includes receiving pre-construction terrain data, design terrain data, and resource data and then defining a plurality of constraints based on the data. Operations of the machines are simulated based on the data. The method includes estimating process variables associated with the operations and defining and scheduling tasks to be performed by the machines. The method includes collecting real time data from the worksite and updating the estimated process variables and the scheduled tasks of the machines based on the collected real time data. Instructions are then provided to the machines for executing the tasks.

Abstract: A method of controlling machines for performing operations at a worksite is disclosed. The method includes receiving pre-construction terrain data, design terrain data, and resource data and then defining a plurality of constraints based on the data. Operations of the machines are simulated based on the data. The method includes estimating process variables associated with the operations and defining and scheduling tasks to be performed by the machines. The method includes collecting real time data from the worksite and updating the estimated process variables and the scheduled tasks of the machines based on the collected real time data. Instructions are then provided to the machines for executing the tasks.

Abstract: A method of controlling machines for performing operations at a worksite is disclosed. The method includes receiving pre-construction terrain data, design terrain data, and resource data and then defining a plurality of constraints based on the data. Operations of the machines are simulated based on the data. The method includes estimating process variables associated with the operations and defining and scheduling tasks to be performed by the machines. The method includes collecting real time data from the worksite and updating the estimated process variables and the scheduled tasks of the machines based on the collected real time data. Instructions are then provided to the machines for executing the tasks.

Abstract: A method of controlling machines for performing operations at a worksite is disclosed. The method includes receiving pre-construction terrain data, design terrain data, and resource data and then defining a plurality of constraints based on the data. Operations of the machines are simulated based on the data. The method includes estimating process variables associated with the operations and defining and scheduling tasks to be performed by the machines. The method includes collecting real time data from the worksite and updating the estimated process variables and the scheduled tasks of the machines based on the collected real time data. Instructions are then provided to the machines for executing the tasks.

Abstract: A system and method dispenses material from a hauling and dispensing machine about a worksite such as a landscape or terrain development. The system uses positioning technologies that transmit positioning signals to the machine. An onboard controller can receive the positioning signals and determine the machine's actual position with respect to the worksite. The actual position can be compared to a desired topography for the worksite and any variation can be determined. From the determined variation, instructions can be generated to dispense and/or cease dispensing material. In one aspect, a remote management system can be included that generates the instructions and that manages a plurality of machines about the worksite.

Abstract: A power train control system for a mobile machine is disclosed. The power train control system has a power source configured to produce a power output, a transmission device operatively connected to receive the power output and propel the mobile machine, and a control module. The control module is configured to receive an indication of a power demand, receive an indication of a current travel speed of the mobile machine, and reference the power demand and the current travel speed with a power train efficiency map to determine a desired power source speed. The power train control system is also configured to control operation of the transmission device to bring a speed of the power source within a predetermined amount of the desired power source speed.

Abstract: An engine that includes two intake and two exhaust valves for each cylinder is equipped for single valve constant lift engine braking. The exhaust valves may be actuated in a conventional manner via a rotating cam and a rocker arm coupled to a bridge that spans between the pair of exhaust valves. Engine braking is accomplished by actuating a brake actuator to hold one of the exhaust valves partially open, while the other of the two exhaust valves is allowed to close. Seating velocity of the non-braking valve is limited by including a second actuator button, namely a valve seating actuator, on the rocker arm that engages the valve bridge above the non-braking valve as it moves toward its closed position when the brake actuator is actuated.

Abstract: An engine valve actuation system may include an intake valve moveable between a first position that blocks a flow of fluid and a second position that allows a flow of fluid. The system may also include a cam assembly configured to move the intake valve between the first position and the second position. An electromagnetic actuator may be configured to selectively modify a timing of the intake valve in moving from the second position to the first position.

Abstract: An engine that includes two intake and two exhaust valves for each cylinder is equipped for single valve constant lift engine braking. The exhaust valves may be actuated in a conventional manner via a rotating cam and a rocker arm coupled to a bridge that spans between the pair of exhaust valves. Engine braking is accomplished by actuating a brake actuator to hold one of the exhaust valves partially open, while the other of the two exhaust valves is allowed to close. Seating velocity of the non-braking valve is limited by including a second actuator button, namely a valve seating actuator, on the rocker arm that engages the valve bridge above the non-braking valve as it moves toward its closed position when the brake actuator is actuated.

Abstract: An engine valve actuator providing Miller cycle benefits and a method of operating an engine valve actuator are disclosed. The valve actuator employs a first force to hold an exhaust valve of the engine open during an exhaust stroke and a second, stronger force to hold the exhaust valve open during a compression stroke. The valve actuator may be operated using pressurized fluid adapted to extend an actuator piston through a cylinder. The first force may be derived by a mechanically driven actuator, while the second force may be derived from a high pressure rail of the engine. A low pressure source of the engine may be used to fill the actuator cylinder, with the high pressure rail only being placed into fluid communication with the cylinder when desired. A control valve may be employed to direct either the low pressure or high pressure fluid to the valve actuator cylinder.

Abstract: A power train control system for a mobile machine is disclosed. The power train control system has a power source configured to produce a power output, a transmission device operatively connected to receive the power output and propel the mobile machine, and a control module. The control module is configured to receive an indication of a power demand, receive an indication of a current travel speed of the mobile machine, and reference the power demand and the current travel speed with a power train efficiency map to determine a desired power source speed. The power train control system is also configured to control operation of the transmission device to bring a speed of the power source within a predetermined amount of the desired power source speed.

Abstract: A method of controlling an engine during an engine startup or shutdown condition includes operating a valve to open a port of a combustion chamber to allow fluid to flow between the combustion chamber and the port for at least one entire engine cycle. The method also includes preventing combustion of fuel during a combustion stroke of the at least one engine cycle. The engine cycle occurs during the engine startup or shutdown condition.

Abstract: A power system for a mobile vehicle is disclosed. The power system has a power source, a first rotor mechanically driven by the power source, and a second rotor rotationally decoupled from the power source. The power system also has a stator common to the first and second rotors.

Abstract: Engines and methods of controlling an engine may involve one or more cams associated with engine intake and/or exhaust valves. In some examples, shifting the rotational phase of one or more cams advances and/or delays timing of the opening and/or closing of valves. Timing of valve closing/opening and possible use of an air supply system may enable engine operation according to a Miller cycle.

Abstract: A method for monitoring driving performance is provided. The method may include determining an engine fuel efficiency based on an engine speed and power output and determining a transmission fuel efficiency based on a drive ratio. A drive-train fuel efficiency may be determined based on the engine fuel efficiency and transmission fuel efficiency, and the drive-train efficiency may be compared to a target drive-train efficiency.

Abstract: A method of operating an internal combustion engine including at least one cylinder and a piston slidable in the cylinder is provided. In at least one embodiment, the method includes: supplying a mixture of pressurized air and recirculated exhaust gas from an intake manifold to an air intake port of a combustion chamber in the cylinder; operating an air intake valve to open the air intake port to allow the pressurized air and exhaust gas mixture to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston; and operably controlling a fuel supply system to inject fuel into the combustion chamber via a common rail fuel injector.

Abstract: Engines and methods of controlling an engine may involve at least one fluid actuators associated with one or more engine intake and/or exhaust valves. Timing of valve closing/opening and use of an air supply system may enable engine operation according to a Miller cycle.

Abstract: A variable compression ratio internal combustion engine and method of operating the same is provided. The engine comprises an engine block defining at least one cylinder; a head connected with the engine block; a piston slidable in each cylinder; a combustion chamber defined by the head, the piston, and the cylinder; an air intake valve movable to open and close the air intake port; an air supply system including two turbochargers in series fluidly connected to the air intake port; a fuel supply system operable to inject fuel into the combustion chamber; an air intake valve assembly comprising a camshaft configured to open the intake valve; and a hydraulically actuated variable intake valve closing mechanism configured to hold the intake valve open.

Abstract: An engine and method of operating an internal combustion engine with either a continuously variable speed transmission or electric drive is provided. The engine and method comprises operating the engine at its optimum engine speed throughout a range of vehicle speeds through, supplying pressurized air from an intake manifold to an air intake port of a combustion chamber in the cylinder, and operating an air intake valve to open the air intake port to allow the pressurized air to flow between the combustion chamber and the intake manifold during a portion of a compression stroke of the piston. In at least one embodiment, the engine and method further comprises using a mixture of pressurized air and recirculated exhaust gas.

Abstract: Engines and methods of controlling an engine may involve one or more fluidically driven actuators associated with engine intake and/or exhaust valves. In some examples, the actuators may be placed in flow communication with high pressure fluid from one source and/or low pressure fluid from another. Timing of valve closing/opening and use of an air supply system may enable engine operation according to a Miller cycle.