Abstract:
Systems and methods for controlling shut down of a multiple cylinder internal combustion engine include a mechanical energy storage device to decelerate an engine crankshaft to a stopping position desirable for restarting of the engine. Energy stored during shut down may be used to adjust or reposition the crankshaft to one of a plurality of angular orientations advantageous for restarting, and/or used to rotate the crankshaft during restarting of the engine. A flywheel having a variable mass, such as provided by two or more segments, which may be fixedly or selectively coupled to one or more springs may be used to selectively store and release energy.
Abstract:
The invention relates to a method for improving the initial conditions for starting a direct injection, spark-ignition internal combustion engine. Measures, such as adjusting the throttle valve, a varying inlet and exhaust valve timings, operating a secondary-air pump, ensures that the internal combustion engine, when running down, scavenges exhaust gases from the cylinder by providing fresh air into the. Furthermore, measures are undertaken for the braking and/or active rotation of the internal combustion engine so that it is a suitable position for renewed starting, the restarting being accomplished without the aid of a starter motor.
Abstract:
The invention relates to a method for switching off an internal combustion engine and to an internal combustion engine suitable for carrying out said method. Here, after a switching off command for an internal combustion engine, the throttle valve in the air intake system is again opened to enable a relatively large amount of fresh air to be sucked into the combustion chambers of the internal combustion engine. This considerably increases the gas forces in the combustion chambers while the engine slows to a standstill, so that the internal combustion engine can be switched off in a controlled manner. At the same time, products of combustion, which may possibly still be present, are removed from the combustion chambers of the internal combustion engine. As a result, the preconditions for directly starting the internal combustion engine without a starter are created.
Abstract:
In order to improve an orthopedic fixation device for connecting a first anchoring element (12) which has a connecting section (26) and can be anchored in or on a bone (18) to a connecting element (14) which can be connected to a second anchoring element which can be anchored in or on a bone, wherein the fixation device is movable relative to the connecting element and to the anchoring element in an adjusting position and can be secured on the connecting element and on the anchoring element in a fixing position, such that the connecting element can be secured on the anchoring element in a particularly simple manner it is suggested that a single tensioning member (50; 122; 166; 172) which is supported so as to be movable be provided for transferring the fixation device from the adjusting position into the fixing position and vice versa.
Abstract:
The invention relates to an orthopedic fixation device for securing a rod-like fixation element, with two clamping jaws which can be moved relative to one another and which, when brought together, clamp the fixation element between them. In order to permit space-saving configurations of a fixation device that can be introduced and operated through small orifices in the body, a cam body is provided which is mounted on the fixation device so as to be able to rotate next to the clamping jaws in the direction of tightening and which, when rotated, pushes one clamping jaw toward the other.
Abstract:
In conjunction with the face mining of bituminous coal, previously excavated or some portions of the tunnel are collapsed in a manner to form a mass of debris into which a mixture of electrostatic filter ash and water is injected to stabilize the structure.
Abstract:
In a screwdriver for bone screws, having a handle and rotationally fixedly held thereon a shaft, the free end of which has a non-circular cross section and is insertable in a positively locked manner in a non-circular receiving opening in the head of a bone screw, at least one expander element being mounted so as to be displaceable in the longitudinal direction in the shaft and so as to slide, when displaced in the longitudinal direction, along a slide surface in the area of the free end of the shaft in such a way that it projects laterally over the contour of the shaft, in order to simplify the actuation of the at least one expander element, it is proposed that the at least one expander element be pretensioned by an elastic spring element in the direction towards the free end of the shaft and be retractable against the action of the spring element in the shaft until it no longer projects laterally over the contour of the shaft.
Abstract:
In order to improve an orthopedic fixation device for connecting a first anchoring element (12) which has a connecting section (26) and can be anchored in or on a bone (18) to a connecting element (14) which can be connected to a second anchoring element which can be anchored in or on a bone, wherein the fixation device is movable relative to the connecting element and to the anchoring element in an adjusting position and can be secured on the connecting element and on the anchoring element in a fixing position, such that the connecting element can be secured on the anchoring element in a particularly simple manner it is suggested that a single tensioning member (50; 122; 166; 172) which is supported so as to be movable be provided for transferring the fixation device from the adjusting position into the fixing position and vice versa.
Abstract:
This description relates to a method for operating an internal combustion engine which is designed and suitable for use with at least two different fuel types. The fuel type is determined by an engine controller and adaptation of engine operating parameters is made in response to the fuel type.
Abstract:
A wear-protection device for a protective guide or steering plate with a steel plate, which has at least one front face subjected to a load and lateral surfaces, which are separated by edge areas. The lateral surface is covered, at least partially, by a lateral wear-protection device which has at least one wear-protection element on each lateral surface. On the front face subjected to a load by a front wear-protection device formed by at least one wear-protection element, the wear-protection element for the front face subjected to a load has a substantially angle-like cross section with a leg at the front and a lateral leg, and the edge area of the steel plate is surrounded at least partially by the wear-protection element. In this embodiment, the wear protection of the protective guide and steering plate against shocks in the edge area is improved, which extends the service life of the protective guide and steering plate.