摘要:
An ignition coil set for a multicylinder internal combustion engine has a housing and a plurality of substantially identical ignition modules each having a primary coil and a secondary coil accommodated in the housing. A common connecting element is formed so as to provide positioning of the primary coils and the secondary coils and electrical contacting of terminals of the primary coils and low voltage side of the secondary coils when the coils are single spark coils or distribution of high voltage when the coils are formed as double spark coils, and also positioning of the housing which accommodates the ignition modules.
摘要:
An ignition device 11 for a multi-cylinder internal combustion engine is to be designed so that it operates reliably even under conditions of vibration acceleration of the internal combustion engine. Ignition device 11 has, depending on the number of cylinders of the internal combustion engine, rod-shaped ignition coils 12. An end section 22 of each ignition coil 12 is formed by a part of a core 23 of ignition coil 12 that protrudes from a housing 20 of ignition coil 12. A damper 29 is mounted on the part of core 23. The other end section 21 of ignition coil 12 is formed by a high-voltage dome 27, which is mounted in a socket 39 made of elastic material and placed in a spark plug pit 15 of a cylinder head 13 of the internal combustion engine. Ignition device 11 is elastically held by fastening element 33 and secured at both end sections 21, 22 on cylinder head 13 of the internal combustion engine. The high voltage is transferred in an elastic manner to a corresponding spark plug 16 via a high-voltage contact element 48, designed as a spring.
摘要:
In a throttle valve actuator unit having a throttle valve neck that contains a pivotable throttle valve and having a drive chamber for receiving an electric drive mechanism for the throttle valve and for receiving an electric connection plug for a plug connection to a control unit, in order to reduce the production costs while maintaining the many customer-specific characteristics, the drive chamber is enclosed by a housing module, and the throttle valve neck is attached as a separate part to the housing module and secured thereto.
摘要:
An hydraulically controlled actuator for activating a valve, especially for activating a gas-exchange valve in a combustion cylinder of an internal combustion engine, which includes two fluid-filled pressure chambers having controllable chamber volumes and a movable operating piston which delimits the pressure chambers by piston sides facing away from one another, the operating piston acting upon the valve and having an effective closing area acted upon by fluid pressure in the pressure chambers to close the valve and an effective opening area acted upon by the fluid pressure to open the valve. To influence the kinematics of the opening and closing movement of the valve, the operating piston is such that the surface area of at least one of the two effective areas changes along the sliding path of the operating piston.
摘要:
An hydraulic valve actuator for actuating a gas-exchange valve in a combustion cylinder of an internal combustion engine has an operating piston delimiting two pressure chambers, of which the lower pressure chamber acting in the valve-closing direction is permanently charged with fluid pressure via which an intake and return line can be charged by, or relieved of, fluid pressure. To brake the gas-exchange valve in the final phase of the closing procedure to reduce the set-down speed, the return line of the upper pressure chamber is split between two discharge openings, which are connected to one another and arranged in the housing with axial clearance, the upper discharge opening being coupled to a restrictor and the lower discharge opening being displaceable relative to the operating piston and disposed in its displacement path such that it may be closed thereby at a defined distance, prior to reaching its upper limit position.
摘要:
An internal combustion engine having at least one combustion cylinder that includes a combustion chamber provided with gas-exchange valves, and an electrohydraulic valve control device having valve actuators that actuate the gas-exchange valves. To reduce manufacturing costs and/or the installation space required for the electrohydraulic valve control device, at least two synchronously controlled gas-exchange valves are connected using a coupling element to a common valve actuator, and the connection sites of the gas-exchange valves are flexibly formed on the coupling element.
摘要:
In a device for restoring a throttle valve, which is for controlling combustion air of an internal combustion engine, into a definite limp-home air position, having a throttle valve shaft, which supports a drivable driver and is rotatably supported in a housing, and having a prestressed clamping spring, whose spring ends, by simultaneously embracing a housing catch and a driver catch on opposing catch surfaces, fix a limp-home air position of the throttle valve, from which the throttle valve can be moved through rotation of the driver , a compensation spring, which has a definite initial stress force directed counter to the spring force of the clamping spring, is disposed between one spring end of the clamping spring and a catch surface on one of the catches in order to produce a rotary play-free state of the driver in the limp-home air position.
摘要:
In actuating drives for throttle valves, it can happen that the throttle valve becomes stuck, for instance by freezing solid. In the control device proposed, even a throttle valve that has frozen relatively solidly in place can be shaken loose with a relatively weak actuating drive. The control device is suitable in particular for vehicles provided with a throttle type of internal combustion engine.
摘要:
A supercharging device, especially for supercharging internal combustion engines, having a first supercharging device and an additional supercharging device, which each have one compressor part and each have one turbine part, and a supercharging pressure prevails in an intake manifold on the intake side of the internal combustion engine, and an exhaust gas counterpressure prevails in an exhaust gas manifold, on the outlet side of the internal combustion engine. A switching element is provided, in the intake tract of the internal combustion engine, between the compressor part of the first supercharging device and the compressor part of the additional supercharging device, using which, switching over is performed from the series connection of the compressor parts to the parallel connection of the compressor parts and vice versa.
摘要:
A valve actuator for operating a gas exchange valve of an internal combustion engine has a sleeve-shaped positioning piston which is connected to a valve stem, has at least two shell-shaped wedge pieces enclosing a stem end of the valve stem, whose radially outer peripheral surfaces have a conical segment which tapers off with increasing distance from the gas exchange valve and which is at least partially surrounded by a conical clamping sleeve having a mating conical inner surface and is connected to the positioning piston. The wedge pieces are axially form-fittingly and rotatably connected to a threaded bolt. A threaded segment is provided on the threaded bolt via which the wedge pieces and the conical clamping sleeve are axially attachable to one another.