摘要:
A powertrain system is provided and may include a combustion engine, a crankshaft, and a turbo-compounding system. The combustion engine may include an intake manifold and an exhaust manifold. The crankshaft may be driven by the engine. The turbo-compounding system may be configured to drive the crankshaft and may include a first turbine and a drive system. The first turbine may include an inlet fluidly communicating with the exhaust manifold. The drive system may include an input shaft driven by the first turbine, and an output shaft engaged with the crankshaft. The drive system may be configured to drive the output shaft at more than one drive ratio relative to the input shaft.
摘要:
A powertrain system is provided and may include a combustion engine, a crankshaft, and a turbo-compounding system. The combustion engine may include an intake manifold and an exhaust manifold. The crankshaft may be driven by the engine. The turbo-compounding system may be configured to drive the crankshaft and may include a first turbine and a drive system. The first turbine may include an inlet fluidly communicating with the exhaust manifold. The drive system may include an input shaft driven by the first turbine, and an output shaft engaged with the crankshaft. The drive system may be configured to drive the output shaft at more than one drive ratio relative to the input shaft.
摘要:
An engine assembly including a cylinder wall extending about a cylinder bore is disclosed. A piston slidingly received within the cylinder bore includes a ring groove extending about the piston in a ring plane that is transverse to a longitudinal axis of the cylinder bore. A piston ring is received in the ring groove of the piston. A port extends through the cylinder wall to communicate fluid to or from the cylinder bore. The port has an oblique geometry relative to the ring plane and a plurality of windows that extend at least partially about the cylinder bore in a path that is transverse to the ring plane. The oblique geometry of the port staggers entry and exit of the piston ring relative to the plurality of windows as the piston reciprocates within the cylinder bore. This helps prevent the piston ring from clipping the port.