Abstract: Disclosed a common-rail, fuel-injection system in which an actual quantity of fuel injected is found in consideration for a quantity of dynamic fuel leakage, thereby making it possible to inject a desired quantity of fuel per cycle in accordance with the engine operating conditions. A quantity of fuel to be supplied from the common rail is found from a first mapped data defined previously, in conformity with a common-rail pressure Pch and a difference &Dgr;Pc in pressure taking place between the common-rail pressures just before and after the fuel injection. Moreover, a quantity of dynamic fuel leakage is found from a second mapped data defined previously, in conformity with a common-rail pressure Pch just before the fuel injection and a command-pulse width for controlling the fuel injection.
Abstract: A fuel injection valve for internal combustion engines, having an axially displaceable valve member which is disposed in a valve body. On an end toward an engine combustion chamber the valve member has a conical valve sealing face with which the valve member cooperates with a conical valve seat face on the valve body for controlling an injection cross section. Via an internal guide the valve member is guided slidingly displaceably on a tang of a stationary insert body.
Abstract: In an axial piston compressor, especially a swash plate compressor for generating compressed air in motor vehicles, an oil-lubricated drive and an air compressor part that operates without oil are provided. The pistons that travel in cylinder bores under the guidance of a swash plate each have at their backs the intake chamber formed by chambers and a pressure chamber on the front. Intake valves are mounted on the pistons, while pressure valves are provided in cylinder head, cooled by cooling oil or water. The seal between oil-lubricated drive and the compressor part that operates without oil is provided by sealing elements that act on the outer circumference of the piston rods of the pistons.
Abstract: A subsidiary tank 89 provided on a side wall of an engine block on an outboard engine system temporarily stores a fuel supplied from a fuel tank not shown and provided on a hull, and pressurizes the fuel to a high pressure to deliver it to a fuel injection valve 94. An upper space in the subsidiary tank 89 is connected to an inner space of an intake silencer 76 through two air vent pipes L7, L8. Even when a fuel vapor liquefies in the intake silencer 76 at the time of engine suspension, the liquefied fuel is caught at a bottom of the intake silencer 76 having a large volume with no possibility of flowing out.
Abstract: A unit fuel injector for delivering fuel to a combustion chamber of direct-injection internal combustion engines, having a pump unit for building up an injection pressure and for injecting the fuel via an injection nozzle into the combustion chamber. A control unit with a control valve that is embodied as an outward-opening A-valve, and a valve actuation unit for controlling the pressure buildup in the pump unit. In order to create a unit fuel injector with a control unit that has a simple design, is small in size, and in particular has a short response time, the valve actuation unit is embodied as a piezoelectric actuator.
Abstract: A fuel feeding system for a multi-cylinder engine, especially a large diesel engine, includes at least two high pressure pumps for feeding fuel from a fuel tank into respective pressure accumulator units, each of which defines a pressure chamber which is connected to at least two injectors. A passage interconnects the pressure chambers of the pressure accumulator units without obstruction. An auxiliary valve is attached to one of the pressure accumulator units for selectively connecting the pressure chamber of that pressure accumulator unit to the fuel tank.
Abstract: A method for controlling an internal combustion engine includes the determination of a measured value of an actual torque. An estimated value of the actual torque is determined as a function of operating variables of the internal combustion engine. A correction value is calculated as a function of the estimated value and the measured value of the actual torque. A setpoint value of the torque that is to be set by the air mass flow rate is calculated as a function of a pedal position, which is determined by a pedal position sensor, and of at least one further operating variable, and correction as a function of the correction value. An actuator signal for an actuator element of the internal combustion engine is determined as a function of the corrected setpoint value of the torque.
January 31, 2000
Date of Patent:
May 29, 2001
Johann Froehlich, Hong Zhang, Stefan Treinies
Abstract: An ignition coil comprises a center magnetic core, a secondary coil wound on a secondary coil bobbin which is arranged at an outer side of said center magnetic core, a primary coil wound on a primary coil bobbin which is arranged at an outer side of said secondary coil. At least one of said secondary coil bobbin and said primary coil bobbin is formed by a, material which contains sulfur in a main chain of an aromatic class. The ignition coil has a superior anti-electric treeing. A coil component of the secondary coil and the primary coil of the ignition coil is arranged and accommodated in a coil case, an epoxy resin filling up at least melting silica is potted and is hardened. A development of the electric treeing can be restrained and the ignition coil having a superior endurance performance can be provided.
Abstract: An apparatus and a method for connecting a fuel pressure tube to a side feed injector device of an internal combustion engine providing a conduit for leak-back transfer from the injector to a take-off point for return to the fuel feed system having a holder for fitting onto an injector body and serving to receive a fuel pressure tube, a housing member configured to cooperate with the holder to define a leak-back receptacle, and ducts to enable communication of a leak-back flow of fuel from the injector and to enable controlled delivery of the leak-back fuel for re-use.
Abstract: A laminating a plurality of permanent magnets embedded in storage pores, characterized in that each permanent magnet is inserted in each of said storage pore so as to form gaps at the both ends of the storage pore of the field core, thereby to form air paths for cooling air and a mechanism for cooling such a rotor having permanent magnets characterized by forming air paths for cooling air by providing gaps between each of the inner surface of the end plate and the outer surface of the field core, and also forming air paths for cooling air by placing air paths in the axis direction in contact with each of the permanent magnets on both ends of the permanent magnet, and placing an inlet and an outlet of the cooling air on each of said air paths in such a manner that the cooling air enters one end plate and exits the other end plate via each of said air paths are disclosed.
Abstract: A method for monitoring a pressure sensor, which determines a pressure in a pressure accumulator regulated by a pressure actuator, includes the steps of calculating an expected pressure value in the pressure accumulator for a given point in time based on a holding pressure preset by the pressure actuator and based on a detected rate of change in a mass balance of a medium contained in the pressure accumulator. A pressure value in the pressure accumulator is determined with the pressure sensor at the given point in time. The expected pressure value is compared with the determined pressure value and a malfunction in the pressure sensor is detected if the pressure values deviate from each other beyond a predetermined value. A device for monitoring a pressure sensor is also provided.
Abstract: Four-stroke diesel engine with unit injectors and a catalytic converter in the engine exhaust system for catalytic reduction of nitrogen oxides in the exhaust, the unit injectors have pump pistons, each driven by an individual cam element with a cam curve, which has a first cam ridge effecting injection of fuel during the ordinary injection phase of the engine, and a second cam ridge which achieves so-called post-injection in the engine combustion chamber during the exhaust phase of the engine, for supplying vaporized fuel to the catalytic converter.
Abstract: A method of dispersing de-iceant into a stream of air flowing through an air supply line comprises the steps of placing a turbine in the air supply line; forcing at least a portion of the stream of compressed air to pass through the turbine, thus causing the turbine to spin; and using the spinning turbine to atomize the de-iceant. A preferred turbine both generates an electrical current and disperses a liquid de-iceant and comprises a rotatable shaft; a rotor connected to the shaft; a stator surrounding the rotor and being prevented from turning; electrical conductors connected to the stator; one or more blades connected to the rotating shaft at an angle to the direction of flow of air past the shaft so as to cause the shaft to rotate as air flows past the blades; a centrifuging surface connected to the shaft; and a conduit for supplying de-iceant to the centrifuging surface.
January 23, 1998
Date of Patent:
May 15, 2001
Tanner Systems, Inc.
Arnold M. Heitmann, Robert G. Littlefield
Abstract: A household fan with motor and motor housing for shielding the motor. The electric motor is preferably a four-pole permanent-split capacitor motor with a narrow profile enabling it to fit within a narrow box fan, the motor having a stator including a core of stacked laminations. A first outermost lamination defines a first supporting surface, and a second outermost lamination defines a second supporting surface on which the front and rear casings are supported. Copper windings are wound about the core. A rotor has an output shaft which passes through a central region of the core. The front and rear casings are generally dome-shaped. Each casing has a circumferential side wall and a vented end wall. The front casing has a recessed area around the opening for the output shaft such that a portion of the bladed propeller assembly protrudes within the recessed area, allowing for a narrow profile design. Radially extending legs allow for mounting on parallel brackets along a rear grill of the fan.
October 20, 1998
Date of Patent:
May 8, 2001
Lakewood Engineering and Manufacturing Co.
Abstract: A fluid pump has a pump body and a displacer which is adapted to be positioned at a first and at a second end position by means of a drive, the displacer and the pump body being implemented such that a pump chamber is defined therebetween, and the pump chamber being adapted to be fluid-connected to an inlet and to an outlet via a first opening and a second opening which are not provided with check valves. An elastic buffer bordering on the pump chamber is provided. The displacer is implemented in the form of a plate which is secured to the pump body, and the pump body is provided with a recess defining the pump chamber. The drive acts on the displacer substantially in the area of the first opening. The displacer closes the first opening when it occupies its first end position and leaves the first opening free when it occupies its second end position.
March 13, 1998
Date of Patent:
May 8, 2001
Han-Schickard-Gesellschaft für angewandte Forschung
Abstract: Fuel line arrangement for a liquefied petroleum gas fuel injection system, and method. A fuel supply line provides flow between a fuel tank and a plurality of fuel injectors, and a fuel return line returns a portion of the supply fuel to the tank. The supply line is positioned within the return line so that return fuel substantially surrounds the supply line. Liquefied petroleum gas is vaporized within the return line under certain conditions, thereby cooling supply fuel. A novel Y-connector and bushing are also disclosed.
Abstract: A pressure equalization system serves to prevent an undesired pressure level in a fuel tank of an internal combustion engine. An air/fuel mixture is fed to the internal combustion engine via the carburetor. The carburetor is, on one hand, connected to the clean air side of an intake air filter via an intake channel and, on the other hand, inducts fuel from a control chamber filled with fuel. This fuel flows from a fuel tank via an inlet valve into the control chamber, with the inlet valve being controlled by a control membrane. A start-assist device includes an intake line connected to the control chamber and a return line connected to the fuel tank. A pressure equalization valve connected to the return line of the start-assist device is provided for the fuel tank, with the pressure equalization valve also being connected to the intake channel.
Abstract: A fuel control system for a cylinder injection type internal combustion engine which can avoid frequent changeover of engine control mode and ensure a sufficient vacuum level for a brake operating pressure while protecting against degradation combustibility and fuel-consumption performance of the engine without resorting to additional provision of a special circuit or device. The system includes an intake air flow sensor (2) for detecting an intake air quantity (Qa) fed to an internal combustion engine (1) for thereby outputting a corresponding information signal, a crank angle sensor (5) for detecting a rotation speed (rpm) (Ne) of the engine (1) and a crank angle thereof to thereby output a corresponding information signal (SGT), and a pressure sensor (17) for detecting a brake operating pressure (PB).
Abstract: An engine operation control device which sets higher than the target revolution speed for the idling state the target revolution speed of the engine immediately after the engine operation has shifted to the idling state, to prevent troubles caused by bubbles in the working fluid. When the engine operation shifts to the idling state at time t2, the count value Cnt of the idling counter starts counting. When the count value Cnt reaches the set value Cnt1, the revolution speed correction amount And is added to the target revolution speed for the idling state. The correction amount And progressively decreases with the elapse of time after the engine operation has shifted to the idling state.
Abstract: A control valve for a variable capacity compressor; wherein an opening degree of a valve member disposed in a coolant gas passage for communicating a discharge pressure region of the variable capacity compressor with a crankcase thereof is made adjustable by a magnetization action of a solenoid, thereby causing an inclination angle of a wobble plate to change and also causing a discharging capacity of the compressor to change; and which is characterized in that the main valve body comprises a solenoid, a pressure sensitive chamber provided with bellows and a valve chamber provided with the valve member, and that the solenoid is provided with a plunger connected with one end of a stem, whose other end of the stem being detachably contacted with a stopper of the bellows, and the other end of the plunger being linked to a rod to be contacted with the valve member.