Abstract: A valve arrangement for regulating the idling speed of internal combustion engines by controlling the quantity of air on the intake side of an intake manifold 1 leading to the internal combustion engine. The valve arrangement has an electromechanical control member which has a solenoid 7 by which a closure member 4 can be moved, via a control element, in opposition to the force of a return spring 8. The closure member 4 is movable relative to the control element between a position of rest and an operating position and, in the position of rest, is in a well-defined partially open position of the valve passage.

Abstract: The valve member (4) of a bypass valve (2) of a device for regulating the idling of an internal combustion engine is provided, for pressure equalization, with a back-pressure chamber (8) which is in communication via a pressure-equalization connection (9) with the pressure-inlet side of the bypass valve (2). This pressure-equalization connection (9) debouches as close as possible to the narrowest point of the gap between the valve member (4) and the valve seat (7) in the housing (1) of the bypass valve (2).

Abstract: In a method for producing a pulsed setting voltage (v). said voltage is pulse-duration modulated with an electric control variable. The setting voltage serves to act on a setting drive having an inductance, particularly an electric motor setting drive (9) of a throttle valve (11) of an internal combustion engine. In order to obtain at the same time good periodic excitation of the setting drive as well as a low electric loss power in the setting drive, the setting voltage which is pulsed with a high clock frequency (f.sub.0) is pulse-duration modulated with a low fundamental-modulation frequency (f.sub.m) as well as a control variable.

Abstract: The device is provided in an intake pipe 9 in connection with a throttle valve 2 which is displaceable by a gas pedal 7 and acted against by a return spring 8. To this throttle valve there is connected a rotary element 9 on which there is developed at least one rotary stop 10 which limits an angular range of the idling aspiration regulation. The rotary element is coupled to an actuator 16. The throttle valve 2 serves as closure member which determines the idling air throughput. A swingably mounted regulating lever 5 is connected to the gas pedal 7 and the return spring 8, by which the lever can be moved back against a fixed regulating lever stop 12. The rotary element 9 to which the throttle valve is fastened is carried along by the regulating lever 5 as a result of actuation of the gas pedal only when the regulating lever rests against the rotary stop 10 of the rotary element 9.

Abstract: A valve arrangement for regulating the idling speed of internal combustion engines by controlling the quantity of air on the intake side of an intake manifold 1 leading to the internal combustion engine. The valve arrangement has an electromechanical control member which has a solenoid 7 by which a closure member 4 can be moved, via a control element, in opposition to the force of a return spring 8. The closure member 4 is movable relative to the control element between a position of rest and an operating position and, in the position of rest, is in a well-defined partially open position of the valve passage.

Abstract: A voltage supply for a servomotor (9) is effected via a wiper (10) which slides on two conductive paths (5, 6) which are displaceable in longitudinal direction. The conductive paths (5, 6) have, at their opposite ends, a driver (15, 17) against which the wiper (10) can come in its end positions upon further displacement, in order to be able to carry the corresponding conductive path (5, 6) along with it. Directly before the driver (15, 17) is reached, no voltage is tapped off from the corresponding conductive path (5, 6), so that the servomotor (9) then stops.

Abstract: An improvement is disclosed for a valve arrangement for adjusting the idling speed of an engine of the type having an intake manifold and a throttle valve in the manifold. In this arrangement there is a bypass of the throttle valve, and an electromechanical setting element and a solenoid connected to a closure member for the bypass via a setting member. A return spring biases the setting member in a closing direction and the solenoid can urge the setting member in an opening direction against the force of the return spring. The closure member is urged in the opening direction by pressure on the admission side of the manifold. This admission side is connected to a chamber having a moveable wall connected to the closure member. In accordance with the improvement the chamber is connected to the intake side of the manifold by a connection which includes a valve which is adapted to close the connection during a control process.

Abstract: In a device for regulating the idling speed of an internal combustion engine by controlling the feed, having an electromechanical setting member, there are provided an electric drive member (core 1, coil 2) and at least one magnetic flux-conducting element (push rod 3) between the drive member and a valve element (impact plate 8) and at least one return spring (6) which acts on the drive member. In order to avoid, as far as possible, any rebound of the sealing member, a prestressed decoupling spring 7 is arranged between the magnetic flux conducting element (push rod 3) and the valve element (impact plate 8) and an opposing spring (9) acts directly on the valve element (impact plate 8).

Abstract: A valve arrangement for regulating the idling speed of internal combustion engines by control of the quantity of air on the intake side of an intake manifold 1 leading to the combustion engine. It has an electromagnetic control member which has a solenoid 7 by which a closure member 4 is movable, via a control element, against the force of a return spring 8. A valve 11 which can be opened in the closed position of the closure member 4 is arranged within a connection 10 of given cross section from the inlet side to the outlet side of the closure member 4.