Abstract: An outboard motor assembly includes a hydraulic pump which is carried by the motor assembly and is drivingly connected to the main drive shaft at a point located between the motor and the propeller shaft. The hydraulic fluid storage container is carried by the housing assembly of the motor. Hydraulic fluid couplings are provided for connecting the hydraulic pump to a hydraulically driven device which is remote from the outboard motor assembly. The couplings are carried by the motor assembly and comprise an output coupling member and a return coupling member. The output coupling member communicates with the pump and the return coupling member communicates with the fluid storage chamber. The outboard motor assembly is suitable for use in association with a winch which is adapted to be mounted on a boat. The winch includes a hydraulic motor which is drivingly connected to the hydraulic pump.

Abstract: A system for converting the output of a constant speed motor to variable fluidic flow at the ends of a linear actuator comprising a drive gear coupled with an electric motor for concurrent rotation at a fixed rotational speed; a driven gear operatively coupled to the drive gear; a drive train operable in response to rotation of the drive gear to rotate the driven gear, the gear train including adjustment mechanisms for selectively varying the rotational orientation between the drive and driven gears; a pump having a pair of spaced cylinders in axial alignment with pistons coupled through a reciprocal connecting shaft and with a connector rod pinned at its midpoint to the connecting shaft for oscillation; rigid links coupling the ends of the connector rod with the drive and driven gears so that rotation of the drive and driven gears will oscillate the connecting rod and reciprocate the connecting shaft at a speed correlated to the orientation of the adjustment mechanisms of the gear train; and fluidic lines co

Abstract: Control system for a load-sensing hydraulic drive circuit comprising; at least one hydraulic pump; hydraulic actuators driven by the hydraulic pump; and a pressure compensated flow control valve between the pump and each of the actuators, for controlling a flow rate of fluid to each actuator in response to a control signal. The control system has first detection means for detecting a differential pressure between the pump delivery pressure and the maximum load pressure; second detection means for detecting the pump delivery pressure; first means for calculating a differential pressure target pump delivery amount Q.DELTA.p to hold the differential pressure constant; second means for calculating an input limiting target pump delivery amount QT based on at least a pressure signal from the second detection means and an input limiting pump function; third means for selecting one of the differential pressure target delivery amount Q.DELTA.

Abstract: A hydraulic lifting arrangement for a lift assembly on a materials-handling vehicle includes a working piston-cylinder device (17) for raising and lowering the lift assembly, a reversible pump assembly (40) for operating the piston-cylinder device, and an electric motor for driving the pump assembly. The piston-cylinder device (17) is a double-acting device and has two working chambers (28,29), which are connected to the pump assembly by connecting pipes (46,47). The pump assembly comprises a first and a second hydraulic pump (41,42) having fixed displacements. The pumps are so arranged in the system that together they supply hydraulic medium to and receive hydraulic medium from solely the first chamber (28) whereas only the pump motor (41) supplies and receives hydraulic medium to and from the second chamber (29).

Abstract: A method of controlling a speed reduction ratio includes setting a reference engine speed in correspondence with an accelerator opening, measuring the atmospheric pressure, correcting the reference engine speed in correspondence with a change of the atmospheric pressure to compensate for a change in engine output power caused by the change of the atmospheric pressure, and controlling the speed reduction ratio so that the engine speed coincides with the corrected reference engine speed.

Abstract: An automated trash compaction system having an hydraulic cylinder displacing a ram to compact trash in a mobile trash container and having an electronic control unit controlling the displacement of the ram. The electronic control unit generates a ram forward signal in response to a start signal, generates a part-full signal in response to electrical current being supplied to an electric motor driving a fluid pump exceeding a part-full value, and generates a full signal in response to the current being supplied to the electric motor exceeding a full value. After a predetermined full stroke time or upon the generation of the full signal, the electronic control unit terminates the ram forward signal and generates a ram return signal returning the ram to a retracted position. The ram return signal is terminated when the current to the electric motor exceeds a predetermined value.

Abstract: A drive control system for a hydraulic construction machine, comprises a prime mover driven by a hydraulic pump, at least one hydraulic actuator driven by hydraulic fluid discharge from the hydraulic pump, first rotational speed setting arrangement including a first operating arrangement for setting rotational speed of the prime mover, and a second operating arranngement for controlling operation of the hydraulic actuator (3).

Abstract: A cable attachment assembly for coupling and uncoupling a cable to a throttle control system partially encased within a housing. The housing includes an opening aligned with a cable drum and a protrusion adjacent the opening. A cable cover assembly includes an integrally formed collar having a resilient member formed thereon with a first flap at its end. A second flap is integrally formed on the collar adjacent the first flap. During rotation in an assembly process, the resilient member is compressed as the first flap rotates along the protrusion. As the first flap passes the protrusion, the resilient member is outwardly deflected thereby locking the protrusion between the first and second flaps and, accordingly, locking the cable cover assembly to the housing.

Abstract: An auxiliary coupler pressure relief hydraulic system for off-road vehicles including a battery, an engine, an engine ignition system, a reservoir of hydraulic fluid, and a pump for providing hydraulic fluid under pressure. Quick couplers couple hydraulic fluid to an attachment mounted to the vehicle. An electro-hydraulic spool valve is connected to a source of pilot pressure and controls the flow of hydraulic fluid to the quick couplers in response to valve actuating signals. Forward and reverse auxiliary control switches are coupled to the spool valve and provide valve actuating signals resulting in fluid flow to the quick couplers in forward and reverse directions. Also included is an ignition switch having RUN, OFF and RELIEF positions.

Abstract: An engine override control for an engine (10) which drives a vehicle transmission (18) and an auxiliary variable displacement pump (20) and which is operable to increase engine speed beyond a set engine speed command to increase flow from the auxiliary pump which has reached maximum displacement at said set engine speed under the control of flow-compensator control (60). A valve (31) controls the delivery of fluid from the pump to a load (34) and associated orifices (42a) and (43a) establish a pressure differential between the pressure of fluid supplied by the auxiliary pump (20) and the operating pressure applied to the load. A cylinder (80) responsive to the pressure differential acts on a control member (12) for the engine governor to increase the speed of the engine when the pressure differential falls below a predetermined value.

Abstract: Speed regulation of pump drive is set by a pressure-regulating valve providing a constant control pressure for a plurality of normal loads. If a high fluid consumption load such as the lifting cylinder of a forklift truck is to be simultaneously actuated the pump speed and net volumetric displacement must be increased. A higher speed-regulating control pressure from the pressure-regulating valve is required. The control valve for the high consumption load has a spool with an extending inclined cam contacting the biasing spring of the pressure-regulating valve. Upon actuation of this control valve the preload of the biasing spring is increased thereby adjusting the speed-regulating control pressure output of the pressure regulating valve. The pump engine or drive speed and the net volumetric displacement are increased.

Abstract: In a steam generating plant having a main steam line and a pivotally actuated valve movable between open and closed positions for controlling the flow of steam in the main steam line, a system for operating the main steam line valve comprising a spring assembly for biasing the valve pivotally into the closed position, fluid actuated means for urging the valve pivotally into the open position against the biasing action of the spring assembly and means for supplying fluid under pressure for the fluid actuated means, the fluid supply means including a pump operatively connected to the fluid actuated means and at least one exhaust valve operatively connected to the pressure end of the pump.

Abstract: An excavator has a number of different hydraulically powered functions that are controlled by a closed center hydraulic system that features a pair of variable displacement, engine driven hydraulic pumps, the displacement of which is responsive to the demands of the system. The flow to the various hydraulic motors is controlled by pilot operated load sensing control valves that direct fluid pressure to a load sensing line when one of the hydraulic motors in the system is being operated. The load sensing line is connected to the control system of the pumps to place the pumps in stroke when a flow of pressurized fluid is required. The flow of the load sensing pressure to the controls for one of the pumps can be optionally disconnected to place said pump in a standby condition and thereby reduce the flow capacity of the hydraulic system at the option of the operator.

Abstract: A hydraulic motor vehicle brake system with a master cylinder (61) and a hydraulic power booster (24) connected upstream of the master cylinder (61), in which a pressure medium pump (1) which may be driven by an electric motor is used for providing an auxiliary hydraulic energy. The drive of the pressure medium pump (1) may be switched on by a pressure accumulator (26) which in the unbraked operation of the automotive vehicle is permanently kept on a pressure level sufficient for an initial actuation of the brake. The pressure accumulator (26) is charged by means of a pressure control valve (7) in which a valve passage (15, 17) is operable by a hydraulic pressure in the booster chamber (23) of the power booster (24) such as to ensure that upon pressurization of the booster chamber (23) a connection will be locked between the pressure accumulator (26) and the power booster (24).

Abstract: An earth-moving machine has an automatic device for minimizing the running speed of the main engine when no power is required by the hydraulic actuators. This device establishes a predetermined hydraulic fluid flow-rate in the servocontrol in the non-neutral position of the servocontrol itself. This flow-rate is indicated by an on-off flow-rate sensor inserted in the auxiliary hydraulic control circuit between the pump and the servocontrols, this sensor controlling the variation in the operating condition of the injection pump of the main engine by means of an electromagnet.

Abstract: A hydraulically operated automotive transmission on an automobile includes a hydraulic pump coupled to an engine-operated input shaft, a hydraulic motor coupled to a wheel-driving output shaft, a closed hydraulic circuit connected between the hydraulic pump and the hydraulic motor, and a bypass passage connected between the inlet and outlet ports of the hydraulic pump in bypassing relation to the hydraulic motor. A clutch control system combined with the transmission comprises a clutch valve disposed in the bypass passage for selectively opening and closing the bypass passage, and an automatic control device coupled to the clutch valve for controlling the operation of the clutch valve. The automatic control device opens the clutch valve to a first extent which prevents the automobile from creeping while the engine is idling, and closes the clutch valve to a second extent which prevents the engine from racing when the automobile is started.

Abstract: An arrangement for operating a diesel-hydraulic drive on a construction machine in limit-load control with a microprocessor controller in which the installed hydraulic power is greater than the rated output of the diesel engine. Upon thermal and/or diesel-engine overload the hydraulic power which can be taken off is reducible; in the case of non-output loading, after a selectably predetermined time the diesel engine can be switched to idling speed of rotation and hydraulic displacement pumps can be operated with minimum delivery oil quantity; and the adjustable hydraulic displacement pumps can be adjusted in accordance with selectably predeterminable output curves.

Abstract: An acceleration regulator in the driving system of an automotive vehicle comprising an element for transmitting displacement comprising a first portion and a second portion; a differential mechanism having a first input terminal connected to the first portion of the element, a second input terminal, an an output terminal connected to the second portion of the element, and being so arranged that the amount of operation applied through the first portion of the element to the first input terminal is modulated differentially by the piston of the second input terminal so that the modulated amount of operation is taken out at the output terminal; and a fixing mechanism for variably fixing the position of the second input terminal of the differential mechanism, the fixing mechanism being so arranged that when the hydraulic pressure in the hydraulic circuit of the driving system rises to a preset level slightly lower than the relief pressure of the circuit, the second input terminal of the differential mechanism is m

Abstract: A hydraulic power system is disclosed which comprises an internal combustion engine having a speed regulator, and which serves to drive a hydraulic system including a pump and a consumer or load. A throttle valve is positioned in the hydraulic system, and the throttle valve is connected to an adjustable controller, such that the volume flow rate to the consumer is proportional to the control signal delivered to the throttle valve by the controller. The same control signal of the controller is also delivered to the speed regulator of the engine. In one disclosed embodiment, the hydraulic system includes a plurality of consumers connected to a common pump, and each consumer includes an associated throttle valve and controller. Also, means are provided for weighting the several control signals from the controllers, and summing the weighted signals so that a composite adjusting signal is delivered to the speed regulator of the engine.

Abstract: A control for a power drive assembly having a primary energy source, a hydrostatic pump driven by the energy source and a consumer of energy has a multiway valve between the pump and consumer and a control pressure dependent valve receiving fluid from the pump controlling its position and connections between a source of pressure fluid and a spring biased operating cylinder connected to a control lever on the primary energy source controlling operation thereof.

Abstract: A control device for use in a cargo handling vehicle in which a single power plant provides both the vehicle drive and the power to the cargo handling device has a continuously variable transmission. The cargo handling device is actuated by means of a hydraulic pump. Whether or not the cargo handling device is in operation the operator need not adjust the degree of depression of a drive pedal to maintain constant vehicle speed because automatic compensation means are provided for that purpose. The demands upon the vehicle operator are accordingly reduced.

Abstract: A hydraulic brake system for automotive vehicles with a master brake cylinder and with a hydraulic power booster (1) connected upstream of the master brake cylinder, in which a pressure medium pump (6) drivable by an electric motor (9) is employed for providing auxiliary hydraulic energy. The drive of the pressure medium pump (6) may be switched on by a pressure contact (13) of a pressure accumulator (4), on the one hand, and by a brake pedal contact (11), on the other hand. In the unbraked operation of the automotive vehicle, the pressure medium accumulator is permanently kept on a pressure level sufficient for an initial actuation of the brake. A valve assembly is provided which establishes a hydraulic connection between the outlet of the pressure medium pump (6) and the pressure port of the hydraulic power booster (1).

Abstract: The hydraulic device is provided, by way of example, with a pump (10) being driven by a Diesel motor (13) feeding pressure medium through wayvalves (18 to 20) to consumers. The speed regulator (14) of the injection pump of the Diesel motor is influenced with the assistance of a pressure admitted set cylinder (15) on which the pressure generated in a control line (16) acts for the purpose of increasing the speed of the internal combustion engine. This pressure is controlled in cooperation of one of the wayvalves (18) for a single acting consumer and a pressure control valve (28) in such a manner that when actuating a customary wayvalve a constant pressure is generated in line (16). When actuating the other wayvalve (18) a specific control edge (48) becomes active generating an increasing pressure in line (16) being proportional for the deflection of the control slide.

Abstract: A control system for a hydraulic excavator having a prime mover, revolution number control device for the prime mover, at least one variable displacement hydraulic pump driven by the prime mover, displacement volume control device for the pump, actuators driven by pressurized fluid discharged from the pump and working elements driven by the respective actuators. The control system includes maximum revolution number altering device for the prime mover associated with the revolution number control device, maximum displacement volume altering device for the pump associated with the displacement volume control devices, devices for sensing the operation condition of the actuators, devices for selecting an operation mode for each working element and control devices.

Abstract: Engine BMEP being a major contributor to the gap between conventional automobile road fuel mileage and the theoretically possible, indicates the desirability of a continuously variable road wheel/engine speed ratio. There is described a double swash plate, regenerative, hydrostatic system, with a mechanical bypass. The two swash plates facilitate optimization of hydraulic parameters as well as engine BMEP and the rear one which is the primary controller permits modulation of regenerated energy in both directions, with optimum efficiency and facility.

Abstract: Apparatus is for controlling load on an engine, particularly a marine engine powering a controllable pitch propeller which serves as an engine loading device. Apparatus cooperates with a circuit having a supply fluid at a constant supply pressure, and a control fluid at a variable control pressure reflecting engine load. The apparatus has a signal receiver to receive a load demand signal from an operator, and a positioner apparatus with a positioner output which cooperates with the loading device of the engine. The positioner apparatus receives the supply and control fluids and has a partition separating the fluids to permit interaction therebetween to control the positioner output. The apparatus has a hydraulic fluid valve to control flow of hydraulic fluid relative to the positioner apparatus, the fluid valve being connected to the positioner output and an output of the signal receiver so as to be responsive to relative positions of both outputs.

Abstract: A power generating system comprising a hydraulic transmission driven by an electric motor. The hydraulic transmission drives electric generators for recharging the electric motor battery, and a speed reducing mechanism and reverse speed reducing mechanism before and after the hydraulic transmission, respectively, allow the system to operate in optimum efficiency.

Abstract: A hydraulic booster including an input piston adapted to be actuated by a manually operated member such as a brake pedal. The input piston is axially slidable in a power piston which is in turn axially slidable in a booster casing. The power piston divides the inside cavity of the casing into a power chamber and a reservoir chamber. An electrically operated plunger pump is provided and has an outlet port connected with the power chamber and an inlet port. Between the input piston and the power piston, there are defined a first valve and a second valve. The first valve functions to open the power chamber to the reservoir chamber when the pedal is released but to disconnect the power chamber from the reservoir chamber when the input piston is depressed by a first predetermined distance.

Abstract: A hydraulic arrangement with a pressure medium source and at least two consumers connected to it is provided in which the sum of the streams consumed by the consumers can be greater than the maximum delivery stream of the pressure medium source, where one of the consumers is preferred and receives the full stream required by means of a special device and a second consumer is connected to a multiway valve that is controlled by control pressure, whereby, in order to arrive at a small cost-favorable multiway valve, the multiway valve in the device that causes the preference of the consumer is located between a low-pressure medium source and the control pressure chamber of an additional multiway valve that is hydraulically controlled against spring force and is installed in front of the second consumer, and that the spring-side control pressure chamber of this multiway valve is acted upon by the pressure in the control pressure line and the opposite control pressure chamber of this multiway valve is acted upon wi

Abstract: In the hydraulic system disclosed herein, a flow matching device is employed to implement a system in which filling, emptying and holding of a variable volume load, such as a hydraulic piston, may be accomplished at controlled flow rate by a hydraulic circuit including a flow matching control valve.

Abstract: A control device for a hydrostatic gear driven by a drive engine, preferably an internal-combustion engine, is described, having an auxiliary pump, which is driven synchronously with the drive engine speed, for the generation of a control pressure which may be adjusted by way of a regulating valve, which is dependent upon the speed of the drive engine and which acts upon the setting mechanism for the hydrostatic gear. A pressure reducing valve ("inch" valve) is thereby provided for the purpose of shutting off the control pressure as a function of an external parameter and also for lowering the control pressure in the case of a load speed reduction of the drive engine ("partial inch" function).

Abstract: A high pressure hydraulic distributor with a pilot pressure generator, in which a device for reducing pressure is integrated into a distribution section of a compound high pressure hydraulic distributor. The displacement of the slide of the distributor of the section concerned modifies automatically the calibration of the pressure reducer and permits obtaining a reduced pressure which is a function of the displacement of the slide. This reduced pressure is utilized as the pilot pressure for the control means of the source of hydraulic fluid pressure which feeds the distributor.

Abstract: A hydrostatic drive system has an internal combustion engine, a main pump driven by the engine and having a control element displaceable to vary the pump displacement, a control pump driven by the engine, an output motor having a control element displaceable to vary the motor displacement and having a rotary output, and conduits interconnecting the main pump and output motor for driving of the motor by the pump. A speed-measuring pump is connected to the motor output and produces a pressure differential corresponding to the speed of the motor output. A pump controller is powered by the control pump and connected to the pump control element for adjusting the pump displacement. A motor controller is connected to the motor control element for adjusting the motor displacement.

Abstract: An improved hydraulic throttle control apparatus and method for automatically regulating the flow rate of a fixed displacement hydraulic pump driven by an internal combustion engine having a conventional throttle. The apparatus senses the flow requirements of a hydraulic tool, which may be either large or small, that is being driven by the pump. In particular, the apparatus monitors hydraulic pressure in the supply line of the tool, and depending upon the pressure level sensed, sets the engine's throttle to an idle speed position, a high speed position or intermediate speed position. Each throttle position produces a distinct pump flow rate. In a typical embodiment of the apparatus intended for use with a plurality of pumps and tools, the apparatus is comprised of a shuttle valve, first and second hydraulic cylinder means, and a sequence valve.

Abstract: A speed control mechanism for a hydrostatically driven vehicle such as a street sweeper is disclosed which includes a selector lever. When the lever is in a variable engine speed position, depression of an accelerator pedal progressively opens the engine throttle from idle speed to high engine speed and progressively closes an inching valve thereby enabling the operator to comfortably drive the vehicle through stop and go traffic. When the lever is in a governor controlled high speed position, the engine throttle is opened and the engine is driven at high speed under control of the governor, and progressive depression of the throttle progressively closes the inching valve thereby providing optimum power while the vehicle is working, such as sweeping streets, with the speed of the vehicle being controlled by the position of the throttle and the position of the inching valve.

Abstract: An electroresponsive device is energized to actuate an internal combustion engine throttle for switching the engine from idle to a higher speed. The engine drives a hydraulic pump that supplies fluid through a control valve, then a cylinder lock, for driving hydraulic work cylinders. A first switch responds to a low pressure level being exceeded, due to fluid being directed by the control valve to an actuator, to increase engine speed, thereby making the pump pressure higher. A second switch responds to the higher pressure to continue the increased engine speed. When the control valve is restored to neutral position, the hydraulic fluid bypasses through the control valve directly to a sump and the second switch responds to the lower pressure by allowing the engine to go idle speed. A time delay device is provided for disabling the first switch during the time that pressure is dropping from the higher level to below the lower level.

Abstract: An apparatus for regulating the speed of internal combustion engine of a hydrostatic system. A fuel control means acts to control the quantity of fuel delivered to the engine responsive to the immediate hydraulic flow demanded by operation of the hydrostatic system. The speed of the engine is set to one of a plurality of discrete levels in response to the required flow being within one of a corresponding plurality of preselected ranges.

Abstract: Method and device for controlling a motor vehicle power unit consisting of an internal combustion engine and a variable-ratio power divider transmission. For adjusting the output, use is made of the data from the only sensor sensing the speed at the transmission output end, and from the accelerator and brake pedals. The resultant reference value is directly transferred to an engine function generator in which engine characteristics are stored. The output signal from the engine function generator is used to control the throttle or the fuel supply system actuating lever. The reference generator also directly influences a speed function generator, in which the optimum speed is stored. Its output signal is linked with the indication from the sensor so as to form a reference value for the transmission ratio and is processed in a transmission control unit for form actuating signals for the transmission.

Abstract: An apparatus for controlling both pump displacement of a variable displacement hydraulic pump and the quantity of fuel delivered to an internal combustion engine for the purpose of delivering a requested hydraulic flow at a highly efficient operating point. The apparatus includes an underspeed control means for reducing pump displacement in response to the operating speed of the engine lugging below a desired operating speed. Additionally, a fuel control means operates to reduce the quantity of fuel delivered to the engine in response to the operating speed of the engine rising above the desired operating speed.

Abstract: A load responsive fluid power and control system in which the speed of the prime mover, driving a fixed displacement pump, is varied to maintain a constant pressure differential between pump discharge pressure and maximum system load pressure, above a certain predetermined system flow level and in which this constant pressure differential is maintained by pump flow bypass control, at system flows below this predetermined level.

Abstract: The system of this disclosure provides apparatus by which fossil fuel is utilized in the generation of power. The generated power is more efficiently utilized by the apparatus. The system includes an internal combustion process which moves a piston. The piston is directly connected to actuate a special hydraulic pump which provides power fluid to an improved hydraulic motor. Each component of the system is specifically designed respective to the other components of the system to complement one another in a manner to effect an increase in efficiency, and therefore the efficiency gained from each component is added to the efficiency gained by the other components, all of which results in an accumulative gain in power from the total system.

Abstract: The rotational speed of a hydraulic pump motor for a fork lift hydraulic control system is varied basically in accordance with the displacement of spools of manual control valves to allow the pressure supplied to servo cylinders to be smoothly increased. The rotational speed may also be varied in response to additional parameters such as the load to be moved by the servo cylinders, the amount of displacement of the load and the rate at which the spools of the manual control valves are moved to provide improved start free safe load handling characteristics.

Abstract: A lift truck is disclosed with a changeable speed electric motor for driving a single positive displacement pump to supply the power steering and various work handling hydraulic load circuits. Manually actuable selector means are operatively connected with the load circuits and a speed range control means is operatively connected with the selector means for energizing the electric motor in different speed ranges according to the actuation of the selector means. A priority demand valve is connected between the pump and the respective load circuits and supplies fluid to the load circuits, giving priority to the power steering circuit. The speed range control means includes speed regulating means for the electric motor. The motor is energized from the battery and the regulating means includes a pulsing circuit with a motor current feedback to vary the mark/space ratio of the pulses produced by the pulsing circuit.

Abstract: A gearless transmission providing pressurized hydraulic fluid to torque motors for driving a vehicle. A hydraulic pump is driven by a turbine engine shaft to provide fluid to accumulators and then to the transmission device. Fluid is selectively admitted into the transmission by the vehicle accelerator pedal. Thereafter the fluid flow may be restricted through fluid circuitry having orifices which provide variable torque output. The circuitry is controlled by a shifter selector with pilot lines to actuate fluid control valves between two control positions. Especially important for turbine-powered vehicles, the transmission provides a braking function when the accelerator pedal is released in either the low or second control range of operation. Means for providing a reverse mode of operation is also disclosed.

Abstract: A braking apparatus (28) includes a housing (38). The housing (38) includes therein: a master cylinder section (40) for supplying pressurized fluid to the brakes (24) of an automotive vehicle (10) to effect a brake application, a hydraulic booster section (42) for assisting the master cylinder section (40) to effect a brake application, a fluid pumping section (44) driven by an electric motor, for supplying pressurized fluid to the hydraulic booster section (42), and a reservoir section (46) supplying a single fluid to the sections 40, 42, and 44. The electric motor driving the fluid pumping section (44) receives energy from the vehicle (10) only in response to a need for braking. The brake booster (28) includes a fluid pressure accumulator (147) providing pressurized fluid to the booster section (42) during a brake application. The accumulator (147) also provides for power-assisted braking in the event of a failure of the motor-driven pumping section (44).

Abstract: To limit the power output of a hydraulic assembly consisting of plural driven hydraulic motors, hydraulic pumps driving said motors, a single pump driving motor and control means for controlling the hydraulic flow to said drive hydraulic motors, a controller is provided which is supplied with an input signal from a subtractor which in turn is supplied with signals from a reference value setting device and an actual value setting device, the actual value setting device sensing the speed of the driving motor. An output signal of the controller is applied to all of the control means and is multiplied in each control means by a signal proportional to the setting of said control means, in order to obtain the flow control signal.

Abstract: A method of controlling an internal combustion engine (14) having a power control (15) and a variable hydrostatic transmission (16, 17) including a hydraulic pump (16) driven by the internal combustion engine, and a hydraulic engine (17) connected therewith.By automatic adjustment of the power control (15) and the ratio (E) of the hydrostatic transmission (16, 17) independently of each other according to a predetermined mathematical control function (FIG. 1) which describes a desired relationship between power and rotational speed of the internal combustion engine, a specific discrete power output is delivered between zero load and full load only at an associated discrete rotational speed of the internal combustion engine.

Abstract: Upon initiation of a steering operation, a gerotor gear set rotates a directional control valve to an actuated condition. Initial rotation of the directional control valve actuates a switch assembly under the influence of forces transmitted from the directional control valve. The switch assembly is located in one section of a housing and the directional control valve is located in another section of the housing. The two housing sections are connected in fluid communication so that there are no seals to impede actuation of the switch assembly upon rotation of the directional control valve. The switch assembly and its housing section are rotatable together with the directional control valve to adjust the initial position of the directional control valve relative to the other housing section. In one embodiment of the invention, actuation of the switch assembly effects operation of an electric motor to increase fluid flow from a pump to a steering control assembly.

Abstract: There is disclosed a throttle control means connected to the throttle which in response to operator input puts the throttle in one of two positions, the first fully open and the second an idle position, a transmission control system including desired speed input means responsive to operator input producing a signal indicative of the drive wheel speed desired by the operator, actual speed means connected to the drive wheels for generating a signal proportional to the road speed of the vehicle, comparing means connected to the desired speed and actual speed means and to the transmission for comparing the desired speed means and the actual speed means and, responsive to results from such comparing, generating a control signal changing the output-to-input speed ratio of the transmission.

Abstract: The upper panel of a tailgate assembly is moved in a downward and rearward convexly curved path between an upward and forward position and a rearward and lowered position and the lower panel is rotated forwardly and rearwardly with respect to the upper panel. Linkages are included in the tailgate assembly to provide this movement. A lower surface of the fixed panel may have an upwardly curved lower surface which imparts a forward direction of movement to refuse which is packed against it. The upper panel may have a curved forward surface in close proximity to a rearward surface of the fixed panel. During movement of the upper panel, the rearward surface of the fixed panel removes refuse from the curved forward surface. The upper panel is tilted as it moves and during its upward movement the lower portion of the upper panel is tilted forwardly. This imparts a forward movement to refuse which is moved through the opening into the storage body.