Abstract: An internal combustion engine in a motor vehicle is automatically shut off and started by way of a start-stop device, wherein an automatic shut-off process is initiated during a coasting operation phase of the internal combustion engine, and an automatic start process is initiated when at least one activation command occurs. For shutting off the internal combustion engine in the coasting operation phase, a gas exchange in cylinders of the internal combustion engine is at least almost completely suppressed and, at the same time, a torque converter lock-up clutch disposed between the internal combustion engine and the transmission for power transmission purposes is actuated such that the torque converter lock-up clutch remains or is at least almost completely engaged.

Abstract: An internal combustion engine in a motor vehicle is automatically shut off and started by way of a start-stop device, wherein an automatic shut-off process is initiated during a coasting operation phase of the internal combustion engine, and an automatic start process is initiated when at least one activation command occurs. For shutting off the internal combustion engine in the coasting operation phase, a gas exchange in cylinders of the internal combustion engine is at least almost completely suppressed and, at the same time, a torque converter lock-up clutch disposed between the internal combustion engine and the transmission for power transmission purposes is actuated such that the torque converter lock-up clutch remains or is at least almost completely engaged.

Abstract: A drive device for a motor vehicle includes a multi-cylinder internal combustion engine and at least two exhaust gas turbocharger devices. At least one outlet valve is assigned to an exhaust gas turbocharger device of each cylinder of the internal combustion engine in such a manner that the exhaust gas duct assigned to this outlet valve is connected to the turbine wheel of the exhaust gas turbocharger device.

Abstract: A drive device for a motor vehicle includes a multi-cylinder internal combustion engine and at least two exhaust gas turbocharger devices. At least one outlet valve is assigned to an exhaust gas turbocharger device of each cylinder of the internal combustion engine in such a manner that the exhaust gas duct assigned to this outlet valve is connected to the turbine wheel of the exhaust gas turbocharger device.

Abstract: The invention relates to a two-stroke engine in the form of a drive motor in a motor-driven chain saw or like portable handheld work apparatus. A combustion chamber (4) is provided in a cylinder (2) of the engine and is delimited by a piston (1). The piston (1) drives a crankshaft (6) via a connecting rod (5) and the crankshaft (6) includes a crankweb (7). The combustion chamber (4) is connected via an outlet to an exhaust-gas muffler. A fresh mixture is supplied to the combustion chamber (4) from the crankcase (3) via a transfer channel (10). The entry of the fresh mixture takes place via the crankcase (3). Also, an air channel (21) is provided for supplying fuel-free air. To reduce the scavenging losses, the air channel (21) is connected via a storage space (20) to the crankcase (3). The transfer channel (10) is either connected directly via a valve (23) to the crankcase or indirectly via the storage space (20).

Abstract: The invention relates to a two-stroke engine in the form of a drive motor in a motor-driven chain saw or like portable handheld work apparatus. A combustion chamber (4) is provided in a cylinder (2) of the engine and is delimited by a piston (1). The piston (1) drives a crankshaft (6) via a connecting rod (5) and the crankshaft (6) includes a crankweb (7). The combustion chamber (4) is connected via an outlet to an exhaust-gas muffler. A fresh mixture is supplied to the combustion chamber (4) from the crankcase (3) via a transfer channel (10). The entry of the fresh mixture takes place via the crankcase (3). Also, an air channel (21) is provided for supplying fuel-free air. To reduce the scavenging losses, the air channel (21) is connected via a storage space (20) to the crankcase (3). The transfer channel (10) is either connected directly via a valve (23) to the crankcase or indirectly via the storage space (20).