Maschinenfabrik Augsburg-nurnberg Aktiengesellschaft

Man Nutzfahrzeuge Ag

M.a.n. Maschinenfabrik Augsburg-nurnberg A.g.

Nunzio D'Alfonso

Alfred Neitz

Hans Pickel

Jurgen Lorenz

Jurgen Ensner

A device for compensation of voltage drop at light sources of a vehicle has light sources having a resistance R,and connected to a vehicle battery. An auxiliary charging device with electric motor is provided. The electric motor has an on/off switch and is connected to the vehicle battery. The electric motor is connected parallel to the light sources. A resistor is serially connected upstream of the light sources and is selected, based on the resistance R,, such that a nominal current I flowing through the light sources causes a voltage drop &Dgr;E&equals;I&times;R in the resistor that matches a voltage drop occurring when the electric motor is switched on. A first switch is connected parallel to the resistor for short-circuiting the resistor when the electric motor is switched on by the on/off switch.

Device for compensation of voltage drop at light sources of a vehicle with electrical auxiliary charging device

The present invention relates to a hydraulic control device for poppet valves of combustion engines. In order to increase the braking power of combustion engines it is desirable to vary the poppet valve opening times independent of the movement of the cam. According to the present invention a connecting line is provided between the cam input piston that is actuated by the cam and the valve-actuating piston of the poppet valve. A further control line is branched off that connecting line and leads to a control unit which opens or closes the connection between the control line and the recycling line. The cam input piston itself may serve as the control piston and also open or close the connecting line to the recycling line in order to open and close the poppet valve.

Hydraulic control device for poppet valves of combustion engines

An auxiliary combustion air supply arrangement for an internal combustion engine having a combustion air supercharger driven by an exhaust gas turbine. During time periods characterized by lack of sufficient exhaust gas energy, in order to increase the supply of air to the intake manifold of the engine, auxiliary combustion air is obtained directly from a compressed air tank and is supplied to the intake manifold via an appropriate control mechanism. A delay element as part of the fuel injection system is provided, whereby the control mechanism as well as the delay element are actuated by operation of a gas pedal, as a result of which the supply of auxiliary combustion air precedes the fuel injection, with injection of the full fuel injection quantity not being initiated until later.

Acceleration aid for an internal combustion engine having an

A direct-injection internal combustion engine has a rotationally symmetric combustion chamber which is located in the crown of a piston. Air for combustion is admitted into the combustion chamber in such a manner as to circulate about the axis of the latter. Fuel is injected into the combustion chamber through a discharge passage as a function of the engine load and speed. Within the upper range of engine load and speed, the fuel is injected as a concentrated jet and virtually all of the fuel is deposited upon the wall of the combustion chamber. The fuel evaporates from the wall and then mixes with the circulating air. In the lower range of engine load and speed, as well as during idling, the fuel is injected in the form of a finely atomized jet and mixes with the circulating air directly. The effective cross-sectional area of the fuel discharge passage in the lower range of engine load and speed is maintained between about 3 and 15% of the effective cross-sectional area at maximum output. Furthermore, the maximum injection pressure at the discharge passage at nominal rating is maintained at a value approximately 2 to 3 times greater than the pressure required to open the discharge passage.

Fuel injection method and arrangement for direct-injection internal

An air-compressing, direct-injection internal combustion engine formed with a combustion chamber in the shape of a solid of revolution in the piston crown into which fuel is injected via only one jet through an injection nozzle arranged obliquely in the cylinder head, in the direction of the rotating air for combustion. The working of the internal combustion engine is proposed to be improved in such a way that fuel deflection liable to occur in all operating ranges, mainly at the start and at the end of injection due to the rotating air flow and, respectively, when the gas is flowing out of the combustion chamber after the top dead center position, is prevented from affecting the working of the engine and from producing erosion on the piston crown and/or cylinder head. According to the new disclosure, this is essentially achieved by having the fuel jet discharge point of the injection nozzle at top dead center of the piston lying below the piston crown level and projecting into the combustion chamber, and by having the injection nozzle surrounded, with a clearance, by a longitudinally slotted sleeve which is open at the end and projects beyond the discharge orifice (fuel emission point).

Air-compressing, direct-injection internal combustion engine

An arrangement for air-compressing, direct-injection internal combustion engine having fuel ignition, at least one piston with a combustion chamber having a constricted throat and a pertaining cylinder having a pertaining cylinder head is disclosed. In this arrangement, the fuel injector and the combustion chamber of the piston are in communication with one another, the point of intersection of the longitudinal central axis of the fuel stream with the plane of the pertaining cylinder head which limits the upward movement of the piston is positioned within an imaginary circle having a diameter which is at most 1.1 times the greatest diameter of the combustion chamber, and the fuel injector is adapted to be located from the combustion chamber at a distance of up to about 30% of the greatest diameter of the combustion chamber.

Arrangement for air-compressing direct-injection internal combustion

A fuel delivery system provided with at least a fuel delivery pump and a high pressure pump distributing fuel to individual injectors on the cylinders included with apparatus for preheating the intake air for air-compressing internal combustion engines. Communication therewith occurs through a header pipe. Components thereof include an injection valve provided at the end of all high pressure pipes leading to the engine cylinders and arranged to open at a predetermined pressure. Each of the high pressure pipes is provided with a branch off conduit arranged to be shut off by an isolating valve. All branch offs are brought together to a common header pipe supplying the preheating equipment with fuel.

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Nuremberg, Germany

Nunzio D'Alfonso