摘要:
A power cutter powered by a single cylinder internal combustion engine, the power cutter including: a tool unit having at least one tool, which can be rotated about an axis of rotation; a drive unit including an engine, the engine including an engine cylinder having a cylinder bore centerline, a piston, a crankshaft with a crankshaft axis of rotation and a flywheel, the crankshaft running in a counter clockwise direction as seen towards the flywheel; a cutter arm attached to the drive unit in its inner end and its outer end carrying the tool unit, a centerline of the cutter arm essentially follows a connection line between the axis of rotation of the tool and the axis of rotation of the crankshaft.
摘要:
Brennkraftmaschine (100) mit einem ersten Zylinder (102) und einem zu diesem In Reihe angeordneten zweiten Zylinder (104), einer Kurbelwelle (110) mit einem ersten, zwischen zwei ersten Hubwangen (128) angeordneten Hubzapfen und einem zweiten, zwischen zwei zweiten Hubwangen (132) angeordneten Hubzapfen, wenigstens einer Nockenwelle (114) sowie einer ausgehend von der Kurbelwelle angetriebenen Massenausgleichseinrichtung (101), wobei der kurbelwellenseitige Antrieb der Massenausgleichseinrichtung zwischen den ersten Hubwangen und den zweiten Hubwangen angeordnet ist, um einen effektiven Massenausgleich bei gleichzeitiger Bauraumoptimierung zu ermöglichen.
摘要:
A multi-link engine is provided with an upper link, a lower link and a control link. The upper link is pivotally connected to a piston by a piston pin. The lower link is rotatably mounted on a crankpin of a crankshaft and connected to the upper link by an upper pin. The control link is rotatably connected to the lower link by a control pin and pivotally mounted on a pivot portion of a control shaft. The links are configured and arranged with respect to each other such that inertia forces of a prescribed second or higher order in terms of an engine rotational speed act on at least the upper link and the control link in a transverse direction of the engine with a sum of leftward and rightward inertia forces of the prescribed second or higher order being substantially zero.
摘要:
The balancing arrangement for a piston engine comprises a rotatable balancing mass (1), a driving pulley (3), which can be arranged in force transmission connection with a crankshaft of the engine, a toothed belt (2) for transmitting the rotational movement of the driving pulley (3) to the balancing mass (1) and a belt tensioning device (6). The balancing mass (1) is provided with a toothed circumference that can be engaged with the toothed belt (2).
摘要:
The invention relates to a device and a method for reducing rotational imbalance of a drive train for a hybrid vehicle, wherein the drive train comprises an internal combustion engine (VM), an electrical machine (EM) and a crankshaft. A reduction or nullification of the rotational imbalance is achieved by activation of the electrical machine (EM), wherein said activation is configured as adaptive pilot control (F) which provides an activation signal (u) for the electrical machine (EM), which activation signal represents a rated torque (MEM son) that is to be generated by the electrical machine (EM), with the result that said electrical machine outputs an inverse torque (MEMjst), which at least approximates the rotational imbalance, to the crankshaft for superposition of the torque (MKW) generated by the internal combustion engine (VM).
摘要:
Es soll ein Kurbeltrieb (1) der genannten Art bereitgestellt werden, der hinsichtlich des Massenausgleichs optimiert ist. Das mindestens eine Ausgleichsgewicht (4) auf der nach außen gewandten Seite eine kreisbogenförmige Gestalt aufweist, deren in Umfangsrichtung verlaufende Außenseite (4b) einen gleichgroßen Abstand S aufweist zu einer Bezugsachse (6), welche parallel und um einen Abstand Δ beabstandet zur Längsachse (2a) der Kurbelwelle (2) verläuft, wobei die Bezugsachse (6) ausgehend von der Längsachse (2a) der Kurbelwelle (2) auf der vom Ausgleichsgewicht (4) abgewandten Seite angeordnet ist.
摘要:
An anti-cogging apparatus improves rotation of a rotatable shaft about an axis. The shaft has a cyclical cogging torque acting thereon in a first direction. The anti-cogging apparatus includes a first anti-cogging member and a second anti-cogging member that rotate relative to each other in concert with rotation of the shaft, and the anti-cogging members interact to provide an anti-cogging torque to the shaft in a second direction to at least partially offset the cogging torque.
摘要:
An engine of the invention includes a crankshaft including a crank web; a clutch shaft disposed behind the crankshaft and provided with a clutch; a balancer shaft disposed in front of the crankshaft and provided with a balancer weight; a crankcase for accommodating the crankshaft, the balancer shaft and the clutch shaft; a cylinder section attached to the crankcase; and a starter motor disposed above the cylinder section and capable of driving the crankshaft, wherein the balancer shaft is disposed between a first horizontal surface intersecting an axial center of the crankshaft when the engine is mounted on a vehicle and a second horizontal surface intersecting a lower end of the crank web when the engine is mounted on the vehicle, the balancer weight is disposed below the first horizontal surface, and the starter motor is disposed forward of a vertical surface intersecting the axial center of the crankshaft when the engine is mounted on the vehicle.
摘要:
A power cutter powered by a single cylinder internal combustion engine, the power cutter comprising: a tool unit having at least one tool, which can be rotated about an axis of rotation (108); a drive unit (104) comprising an engine, the engine comprising an engine cylinder having a cylinder bore centreline (138), a piston (140), a crankshaft with a crankshaft axis of rotation (118) and a flywheel (186), the crankshaft running in a counter clockwise direction (ω) as seen towards the flywheel (186); a cutter arm (148) attached to the drive unit (104) in its inner end (148A) and its outer end (148B) carrying the tool unit, a centerline (146) of the cutter arm essentially follows a connection line (146) between the axis of rotation (108) of the tool and the axis of rotation (118) of the crankshaft; Especially the crank web/s (190) are arranged to counterbalance approximately a half piston weight and the flywheel is arranged so that it gives a radially outwards acting unbalance force FB during engine rotation (ω), and FB is provided at a flywheel angle (ƴ) in a clockwise direction in relation to the cylinder bore centerline (138) when the piston (140) is in a top dead center position, and the flywheel angle ƴ is larger than 20° but smaller than 110° in order to at least minimize cutter arm (148) bending stresses.