Abstract: A device for controlling an outlet valve during the engine brake mode has a hydraulic linkage between the outlet valve and the cam shaft which is controllable by a control unit. The control unit is combined with an actuation piston of a pressure source to form an integral component which is identical for each outlet valve. The actuation piston is actuated by a brake cam and actuates the working piston of the hydraulic linkage via the intermediate control unit. With the actuation piston the outlet valve can be opened during the engine braking mode in the compression stroke in order to substantially increase the braking power of the engine. The combination of the control unit with the actuation piston in the form of an integral component allows for an inexpensive manufacture because each individual outlet valve can be provided with such an identical control component.

Abstract: The invention relates to a method and a device for intermittently injecting fuel into a combustion chamber of a combustion engine. Efforts to reduce the emission of pollutants and the noise level of Diesel engines are geared towards a control of the heating process. According to the present invention this is achieved by employing the valve needle of the injection valve as a control member for the fuel supply into the pressure chamber of the valve body, whereby the valve needle is actuated to open and close the valve at a high frequency in short intervals. In conjuction with the high fuel pressure, a good droplet size distribution is realized which leads to a homogeneous fuel-air mixture. Dividing the fuel injection process into short intervals by relatively simple design measures results in an extended heating period which positively influences the NO.sub.x contents.

Abstract: An IC engine is connected via a clutch with a change-speed transmission. A sensor responding to a gear selection informs the electronic control circuitry in which gear the vehicle is traveling. The rotary part of a tachometer is provided at the output of the transmission and is in cooperation with the sensor part of the tachometer, which feeds a signal to the electronic control circuitry. A universal joint shaft runs from the output of the transmission to the axle transmission, which is connected via the axles to the drive wheels. The rotary tachometer elements, connected with the drive wheels, are in cooperation with the tachometer sensors, whose output signals are supplied to the electronic control circuitry and compared therein with a calibration value. Such comparison determines the optimum clutch engagement time for the respective travel and loading condition of the vehicle.

Abstract: 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.

Abstract: A fuel injection device for air compressing combustion engines is provided. In order to reduce undesirable combustion noises it is suggested to divide the injection step into a pre-injection and a main injection. For this purpose, a pressure wave generator is introduced into the injection line which ensures that, even under partial load and at low revolutions of the combustion engine, due to the sudden opening of the pressure wave generator, a high pressure level for the pre-injection is provided. The opening pressure of the pressure wave generator is controlled by the play of forces between the effective hydraulic piston surface and a closing spring, respectively, a piston, whereby the piston may be actuatable via a performance range controlled auxiliary pressure source. Due to the high pressure level provided the pre-injection portion is finally atemized. Subsequent to the pre-injection the main injection commences with a delay resulting from the travel time difference between the two injection lines.

Abstract: The invention relates to a system for the supply of compressed air to the tire of a commercial vehicle by way of a duct system leading through a non-rotary first member into an annular space and then into a rotary second member. The annular space is formed between a receiving sleeve in the rotary member and a race ring on the non-rotary member and is delimited by axially spaced, coaxial seals which may be shaft labyrinth seals or seals making sliding contact.

Abstract: The invention relates to a method for regenerating a soot filter of a Diesel combustion engine. For the burning of soot deposited on the filter two coupled Helmholtz resonators are provided with the exhaust gases being introduced into the resonance pipes at their center portion. The timed ignition of the burners generates pressure waves in the system which may oscillate. When the top of a pressure wave is reached in one of the resonance housings, the temperature rises due to the adiabatic compression process such that the soot is ignited in the down-stream filter. Thereby the filter is regenerated due to the burning of soot. The burners are ignited in phase opposition so that the pressure waves generated by the burners are eliminated by interference at the location of the opening of the exhaust gas line into the resonance pipes. An increase of the counter pressure in the exhaust gas line due to negative feedback of the pressure waves is thereby prevented.

Abstract: The invention relates to a fuel injection system for self-ignition internal combustion engines. The noise reduction of Diesel engines requires new injection systems. According to the invention a pre-injection and a main injection is achieved by employing to injection lines of different lengths. The difference in length is selected such that the time difference of the pressure waves for travelling the respective lengths corresponds to the desired time delay between the pre-injection and the main injection. In order to account for the compressibility of the fuel both injection lines are maintained at a standing pressure. The hydraulic effect of the injection lines on each other is prevented by check valves and by-pass valves. The controlled injection significantly reduces the combustion noise.

Abstract: A stepless hydrostatic mechanical transmission between a prime mover and a power output train in which an epicyclic differential is incorporated in the transmission and includes at least four shafts, a large and a small sun wheel, two planet wheels in mesh with the sun wheels, a web supporting the planet wheels and an annulus. Two main shafts constituting input and output shafts are connected with respectively different shafts of the epicyclic differential. Two hydrostatic machines are connected to the epicyclic differential such that in at least one working range of the power transmission the hydrostatic machines are adapted to be connected to the epicyclic differential and operated as pumps and motors.

Abstract: In the case of hydromechanical power splitting transmission for vehicles the aim of the invention is to make possible the use of the same type of hydrostatic machine is hitherto and of an identical or similar four-shaft planetary differential transmission while at the same time expanding the effective range of conversion to cover substantially at least twice the range. This is achieved in that the hydromechanical power splitting transmission is designed for an extremely wide overdrive operation with a speed of rotation ratio (noutput: ninput of the two main shafts) of up to a maximum of 2. This is achieved by the addition of simple gear trains and the additional provision of clutches.