Abstract: A dual fuel engine powers a machine by burning natural gas and liquid diesel fuel. When operating in a low load mode, some of the engine cylinders are fueled with a high ratio of diesel/gas, and the remaining cylinders are unfueled. When operating in a high load mode, all of the engine cylinders are fueled with a low ratio of diesel/gas. When operating in a limp home mode, the fuel injectors are configured to inject only diesel fuel into all of the plurality of engine cylinders.

Abstract: A hydraulic pump control circuit may include a pressure reducing valve selectively operable to limit the amount of fluid pressure available to an actuator operably coupled to a pump displacement volume adjusting mechanism of a variable displacement pump. The pump may be hydraulically coupled to a motor configured to provide a torque output. The reduced pressure to the actuator limits actuator travel, thereby limiting pump displacement. Accordingly, torque output of the motor may be reduced, thereby improving traction control.

Abstract: A spray head for a fluid distribution system may include first and second deflector inner surfaces defining a fluid outlet. A piston may define a variable orifice communicating with the fluid outlet to control fluid flow through the spray head. An inner surface of the second deflector may define a grooveless deflector central region disposed between first and second deflector lateral regions. Each of the first and second deflector lateral regions may include at least a first deflector groove extending along a first deflector groove path oriented substantially radially relative to the inlet passage, so that the spray head generates a spray pattern having more uniform fluid distribution across the spray pattern.

Abstract: A common rail fuel system includes a common rail supplied by an inlet metered high pressure pump and fluidly connected to a plurality of zero-leak fuel injectors. An electronic controller controls pressure in the common rail predominantly responsive to a rail pressure error when outside of an overshoot avoidance condition corresponding to the error being less than a first threshold and a time rate of change of the error being greater than a second threshold. Pressure in the common rail is controlled predominantly responsive to the time rate of change of the error during the overshoot avoidance condition.

Abstract: In one aspect, a common rail fuel system includes a plurality of fuel injectors that each include an injector body defining a first fuel inlet fluidly connected to a first common rail and a second fuel inlet fluidly connected to a second common rail. Liquid fuel injection from a first nozzle outlet set is facilitated by energizing a first electrical actuator to open a direct operated check. Injection of gaseous fuel from a second nozzle outlet set is facilitated by energizing a second electrical actuator to open an admission valve to flood a gaseous nozzle chamber with high pressure gaseous fuel above a valve opening pressure that opens a conventional spring biased check to facilitate gaseous fuel injection out of second nozzle outlet set.

Abstract: An engine system includes a plurality of turbochargers each including a compressor outlet fluidly connected to an intake manifold of an engine. A plurality of intake conduits are configured to each convey incoming combustion air to one of the turbochargers, and each includes a casing, and a duct within the casing having a surge inhibitor mounted thereon which includes a flow-directing surface oriented obliquely to an axis of the duct to direct combustion air leaked back out of the compressor inlet away from a discharging stream of combustion air exiting the duct.

Abstract: A method and system for managing cruise control in a machine provide for maintaining a speed of the machine at a target speed in the absence of an acceleration or deceleration command from an operator of the machine. When a deceleration command is received from the operator of the machine the machine is slowed below the target speed while the deceleration command is received and is returned to the target speed when the deceleration command is no longer received.

Abstract: A hydraulic system includes a hydraulic transmission including a hydraulic pump configured to be coupled to a prime mover, a hydraulic motor configured to be coupled to an output shaft, and fluid lines coupling the hydraulic pump to the hydraulic motor to provide a fluid circuit providing flow communication between the hydraulic pump and the hydraulic motor, such that operation of the hydraulic pump provides fluid flow to the hydraulic motor, and the hydraulic motor supplies torque to the output shaft. A controller is configured to control operation of the hydraulic transmission. The controller is configured to receive signals indicative of pressure in the fluid circuit and reduce an output of the hydraulic pump when the pressure in the fluid circuit reaches a pressure level, and a rate of response of the reduction of the output of the hydraulic pump is varied based on a temperature of fluid in the fluid circuit.

Abstract: A frame for a cab of a mobile machine includes first and second primary tubes, formed by hydroforming, connected to first and second secondary tubes. The first primary tube includes first and second about vertically extending portions and an about horizontally extending portion. The about vertically extending portions are configured to be connected to the mobile machine, and the about horizontally extending portion is disposed between the about vertically extending portions. The second primary tube includes first and second about vertically extending portions and an about horizontally extending portion. The about vertically extending portions of the second primary tube are configured to be connected to the mobile machine, and the about horizontally extending portion of the second primary tube is disposed between the about vertically extending portions of the second primary tube.

Abstract: A stamped roof panel for the cab of a utility vehicle includes a base portion having a periphery, a protrusion extending upwardly around the periphery of the base portion, and a plurality of drainage gaps in the protrusion. The protrusion has a generally U-shaped cross-sectional profile with a first leg extending from the base portion, a bight portion, and a second leg extending downwardly from the bight portion. The second leg of the protrusion may extend downwardly beyond the base portion and the top edge of the wall panels of the cab. The roof panel may further include a raised panel spaced upwardly from the base portion.

Abstract: The present disclosure sets forth an axial piston pump with greatly improved throughput. The axial piston pump provides cylinders, antechambers, and fluid flow apertures which are uniquely shaped and dimensioned so as to increase the overall flowability and expulsion rate of the piston pump. By providing curvilinear transition zones and fluid flow apertures, the cylinders can be completely filled and pressurized even at the extremely high pressures and RPMs required by modern machines. Such machines may include front-end loaders, excavators, pipe layers, graders, and the like wherein such pumps can be used to power hydraulic cylinders moving the implements, work arms and other tools associated with such machines.

Abstract: A first target wheel has an opening and rotates about an axis of rotation to move the opening along a generally circular path. A second target wheel adjacent the first target wheel has a second projection projecting into the opening of the first target wheel with the second projection being movable along the generally circular path. A single sensor is positioned adjacent the generally circular path and senses movement of the opening and the second projection past the sensor. An electronic controller may be used to process signals from the sensor to determine the relative angular difference between the first target wheel and the second target wheel.

Abstract: A fuel composition for a homogenous charge compression ignition engine includes a combination of a gasoline fuel and a diesel fuel, the combination having a derived cetane number of from about 19.9 to 45 as determined in accordance with ASTM method D6890. A method for making the fuel composition provides for blending presently available gasoline fuel and diesel fuel together in a ratio to obtain the desired fuel composition.

Abstract: A method of operating a dual fuel compression ignition engine includes controlling a liquid fuel pressure within the liquid fuel common rail toward a desired liquid fuel pressure, and controlling a gaseous fuel pressure within the gaseous fuel common rail toward a desired gaseous fuel pressure that is less than the desired liquid fuel pressure. The method also includes commanding a change in the liquid fuel pressure to a decreased liquid fuel pressure that is less than both the desired liquid fuel pressure and a current gaseous fuel pressure. The liquid fuel pressure is maintained above the gaseous fuel pressure during a transition of the liquid fuel pressure toward the decreased liquid fuel pressure by executing the pressure control algorithm.

Abstract: A system and method for controlling operation of an endgate of a screed paving machine using a control device is disclosed. The at least one control device may have a plurality of endgate controls and may be employed for issuing commands to a controller by an operator for controlling operation of the at least one endgate and operate the at least one endgate in an up mode and a down mode, changing the fore/aft pitch of the at least one endgate in tilt-up and tilt-down modes and operating the at least one endgate in auto-on and auto-off modes.

Abstract: A fuel injector includes first and second check valve members that open and close first and second nozzle outlet sets, respectively, to inject two fuels that differ in at least one of chemical identity, pressure and molecular state. The first check valve member defines a through passage, includes a closing hydraulic surface exposed to fluid pressure in the first control chamber, and moves into and out of contact with a first seat on an injector body. The second check valve member includes a closing hydraulic surface exposed to fluid pressure in a second control chamber, and moves into and out of contact with a second seat located on the first check valve member. A control valve member is movable between first and second positions that respectively block and allow fluid communication between the first and second control chambers and a drain outlet.

Abstract: A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control valve configured to control fluid flow between the pump, the swing motor, and the tank. The hydraulic system may also have an accumulator configured to selectively receive pressurized fluid discharged from the swing motor and selectively supply pressurized fluid to the swing motor, at least one accumulator valve, and a controller. The controller may be configured to receive input indicative of a difference between desired and actual speeds of the swing motor, and determine if the swing motor is accelerating or decelerating based on the difference. The controller may also be configured to control the at least one accumulator valve to cause the accumulator to selectively receive or supply pressurized fluid only when the swing motor is accelerating or decelerating.

Abstract: A fuel tank mounting system for movable machine is disclosed. The mounting system may include a fuel tank connected to a frame of the movable machine in such a manner as to allow vertical motion of the tank relative to the frame. The fuel tank may be mounted to the frame using a spring and/or a shock absorber. The fuel tank may be a cryogenic fuel tank for storage of liquid natural gas. The shock absorbers may be tunable so that the level of dampening provided by the shock absorber is tailored to the type of machine and the specific mode of operation of the machine.

Abstract: A hydraulic control system is disclosed for use with a machine. The hydraulic control system may have a tank, a pump, a swing motor, and at least one control. The hydraulic control system may further have an accumulator configured to receive fluid from and supply fluid to the swing motor, a charge valve movable to allow fluid flow from the swing motor into the accumulator, and a discharge valve movable to allow fluid flow from the accumulator to the swing motor. The hydraulic control system may additionally have a controller in communication with the at least one control valve, the charge valve, and the discharge valve. The controller may be configured to detect an acceleration of the swing motor, selectively cause the discharge valve to assist the acceleration, and selectively move the charge valve to an open position to recover energy associated with pressure spikes occurring during the acceleration.

Abstract: A grommet and seal assembly enables a pair of ducts to pass through a sound wall that separates an engine from a cooling system. The disclosed grommet and seal assembly enables the sound wall to flex without breaking the seal between the grommets and the air ducts. The grommet and seal assembly may include a pair of flexible grommets which are installed in openings in the sound wall and through which the air ducts are installed. Rigid proximal and distal plates may then be coupled together so that the flexible grommets are sandwiched between the proximal and distal plates. Each flexible grommet may include dual flanges and all four flanges may be sandwiched between the proximal and distal plates after the proximal and distal plates are coupled together. A center plate may also be included between the flanges and between the proximal and distal plates for additional structural integrity.