Abstract: Embodiments of the present invention include an engine control method for controlling an engine having an accessory. In the method, a relationship between a torque of the accessory and a controlled variable corresponding to each rotational speed of the engine is stored in advance. An estimated value of the controlled variable is calculated based on a calculated value of the torque of the accessory and the engine rotational speed by reference to the said relationship. A command value of the controlled variable is calculated based on at least one of the engine rotational speed, opening of a throttle, opening of an accelerator and an air supply pressure. A calculated difference is determined by comparing the estimated value of the controlled variable and the command value of the controlled variable.

Abstract: A low cost new internal combustion engine with increased mechanical efficiency, fuel saver and pollution control and in particular a new internal combustion engine having improved lubricating mechanism for getting extra time to bum the fuel without knock and combustion noise for achieving increased fuel economy wherein the lubricating system consists of at least one first cross head oil groove formed at the interface cylindrical bearing surfaces of the moving contacting parts on the inner and outer surface of internal combustion engine components. At least one axial oil groove intersecting with first or second oil groove on outer surface of piston skirt, at least one deep “v” furrow and one slot on the outer surface of rocker arm and the spark ignition or fuel injection device having spring governed centrifugal advance fly weights for self regulation in proportion with engine speed from idle to maximum engine speed.

Abstract: A control mechanism functions as a dual stage controller that is alternately and independently responsive to engine oil pressure and intake manifold pressure to adjust fuel delivery by one or more unit pumps. Engine oil pressure is delivered as a control input to one end of a piston bore. Manifold air pressure acts on a diaphragm to deliver another control input which acts on a control piston disposed for reciprocation in the bore. The diaphragm and associated control rod are axially opposed to the end of the bore to which engine oil pressure is delivered. During engine start up, oil pressure is low and a spring bias moves the control piston in a direction to increase fuel delivery. During start up, the control piston position is dependent upon engine oil pressure independent of manifold air pressure. After start up, the control piston position is a function of manifold air pressure independent from engine oil pressure.

Abstract: An inherently fail-safe automatic remote-control and engine protection device of electromechanical/hydraulic assembly is supplied by engine lube oil and controlled by circuitry, acting on an existing non-included throttle or governor, especially in diesel generator standby applications, so as to enhance utility, engine reliability and longevity, all without engine modification. This assembly is a linear actuator, of few parts and no levers, basically comprised of a pull solenoid and a spring-return hydraulic cylinder contained within a guide tube which is held stationary. The solenoid armature is indirectly attached to one end of a cable and the engine governor is linked to the other end. The hydraulic cylinder's rod is rigidly attached to an actuator tube which is a sliding sleeve to the guide tube. The actuator tube itself is coupled to the cable such as to allow independent operation of said cable by solenoid, cylinder, or both.

Abstract: An electrical control system for a paving machine uses a linear actuator to control the speed of an internal combustion engine between a low idle condition, a full speed condition and an economy speed condition. The control system includes electrical circuits responsive to the activated or deactivated condition of propulsion system on the machine, the activated or deactivated condition of work implement systems on the machine and an operator selected activation switch on the machine.

Abstract: An internal combustion engine protection system utilizes lubrication oil pressure to directly protect an engine against failure of the lubrication oil system. The protection system comprises a yieldable base member assembly that replaces the conventional fixed surface of a governor housing for resisting the governor centrifugal weights and high speed spring. The yieldable base member assembly comprises a cylinder and piston arrangement. Lubrication oil is directed to a chamber in the cylinder behind the piston. As long as the lubrication oil pressure maintains the desired value, the piston remains fixed and functions as the conventional fixed surface. Should lubrication oil pressure fall for any reason, the governor high speed spring and centrifugal weights force the piston to move in the cylinder. The high speed spring and centrifugal weights also move to actuate fuel control racks to an engine shut down condition.

Abstract: The lever (13) cooperates on the one hand with a rotatable part (12) and, on the other, is coupled with a to-and-fro movable adjusting member (14). The lever (13) consists of a housing (15) traversed by the rotatable part (12), of a piston-like spring plate (16) and of a return spring (19) clamped-in between housing (15) and sping plate (16). Spring plate (16) and rotatable part (12) form in the mutually cooperating area a torque-limiting driving device. The hollow space (25) underneath the spring plate (16) is adapted to be acted upon with oil pressure by bores (21, 22) in the rotatable part (12) which are controllably connected to a pressure oil source (24). The oil pressure displaces the spring plate (16) so that the driving device is disengaged. The lever (13) is then displaced by the spring (27) of the to-and-fro movable part into an end position independently of the position of the rotatable part (12) which corresponds to the zero delivery of the fuel injection pump (11).

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: The subject air-fuel ratio control system for an engine includes a fluid-powered broken-link mechanism which is operatively linked between an air-fuel ratio control device and a fuel quantity control member, such as a fuel injection pump rack. During startup of the engine, the mechanism disables the device to permit excess fuel delivery. The device is automatically activated after engine startup by the mechanism solely in combined response to the existence of engine oil pressure and a governor moving the fuel quantity control member from an excess fuel delivery position to a predetermined position referred to as an air-fuel ratio control setting. This construction minimizes the duration and quantity of any smoke produced during engine startup, simplifies the cost and construction of the air-fuel ratio control device, and permits relatively easy adjustment of the air-fuel ratio control setting.

Abstract: An apparatus for controlling the engine of a hydraulically driven vehicle includes a transmission mechanism having a loose spring and connecting a fuel control lever operationally to a governor control lever, a decelerator cylinder including a spring having a slightly larger spring force than the loose spring and disposed on the opposite side of a piston from a hydraulic fluid chamber and a piston rod connected to the transmission mechanism by a yoke having a slot, an electromagnetic valve for supplying a hydraulic fluid from a hydraulic pump driven by the engine to the hydraulic fluid chamber in the decelerator cylinder or interrupting its supply, and an electric circuit for opening or closing the electromagnetic valve.

Abstract: A method of and system for controlling a hydraulic power system comprising an internal combustion engine receiving a supply of fuel from a fuel injection pump, and at least one variable displacement hydraulic pump driven by the internal combustion engine. An engine speed deviation is obtained from the difference between a target speed set by an accelerator operation of the internal combustion engine and an output speed thereof. Then a fuel injection target value in predetermined functional relation to the engine speed deviation, is obtained based on at least the engine speed deviation, and a fuel injection rate of the fuel injection pump is controlled based on the fuel injection target value.

Abstract: An internal combustion engine overspeed protection system utilizes a spring-actuated expandable overspeed link in the fuel control linkage to shut off fuel independently of governor or throttle action. The link is normally latched in a contracted condition and positioned in the fuel linkage between a manual fuel lever and the fuel cranks for the respective cylinders of the engine. An automatically resetable hydraulic actuating device unlatches the link in high speed response to an engine overspeed condition. A spring coupling in the fuel linkage permits relatching of the overspeed link by manipulation of the fuel lever.

Abstract: A system for automatically regulating the fuel supplied to the engine of a mobile construction machine which has a hydraulic pump driven by the engine. A tool is carried by the machine for performing work functions and hydraulic cylinders are provided for manipulating the tool responsive to pressurized fluid being supplied to the hydraulic cylinders. A manually operated valve mechanism is provided for controlling the flow of hydraulic fluid between the hydraulic pump and the hydraulic cylinders. A lever arm regulates the flow of fuel to the engine. The lever arm can be manually manipulated or it can be manipulated automatically by means of a double action cylinder. A piston rod extending from the double action cylinder is connected to the lever arm so that the fuel supplied to the engine is regulated responsive to changes in pressure in the hydraulic system.

Abstract: The pedal effort required to change the setting of a governor (13) of an engine increases sharply with increased engine speed. Booster controls have been provided in the art for applying a boost force (F.sub.B), additive to an operator input force (F.sub.L), for opposing the force (F.sub.S) of a governor spring (42) to thus reduce pedal effort at high engine speeds. The improved booster control (15,15a) herein includes an actuating chamber (53,53a) and a control arrangement (51,51a) for controlling fluid pressure in the chamber (53,53a) when the setting of the governor (13) is changed by the operator and in a predetermined ratio to the operator's input force. The booster control (15,15a) has wider application wherein a boosting force (F.sub.B) is desired to supplement an input force (F.sub.L) for controlling movement of a member (23) having an opposing force (F.sub.S) applied thereto.