Abstract:
A rotary turbine bypass valve for an engine arrangement is disclosed. The rotary turbine bypass valve comprises a valve chamber and a valve rotor. The valve chamber is positioned at a junction of an inlet port, an outlet port and a bypass port. The inlet port is configured to fluidly communicate with a flow of exhaust gas from an engine, the outlet port is configured to fluidly communicate with an inlet of a turbine, and the bypass port is configured to fluidly communicate with an exhaust after treatment device. The valve rotor is supported for rotation, about a valve axis, within the valve chamber, the valve rotor comprising a first recess and a second recess, the first recess defining at least part of a primary flow passage, the second recess defining at least part of a secondary flow passage. The valve rotor is rotatable about the valve axis between a first position in which the valve rotor substantially blocks exhaust gas flow through the bypass port and a second position in which the valve rotor permits exhaust gas flow through the bypass port. The secondary flow passage is configured to selectively permit fluid communication between the inlet port and the bypass port when the primary flow passage is at least partially blocked.
Abstract:
According to the invention, a method is provided of operating a combustion engine comprising more than three cylinders with cylinder valves that are operated in a cycle of fuel intake, pressurizing, firing and exhaust strokes. The method comprises carrying out the cycle for at least two cylinders in a simultaneous operation; and having the simultaneously operated cylinders to exhaust in a manifold that couples to a single turbine.
Abstract:
An engine system (100) includes an engine (102) with a crankshaft (114). The crankshaft (114) is rotatable about a crankshaft axis (118) that is defined in a first plane (122). A turbocharger (104) includes a turbine (130) and a compressor (132). The turbine (130) is configured to be driven by an exhaust gas flow from the engine (102) and drive the compressor (132) about a common turbocharger axis (144). An included angle defined between a projection of the common turbocharger axis (144) onto the first plane (122) and the crankshaft axis (118) is an acute angle.
Abstract:
Die Erfindung betrifft eine Turbine für einen Abgasturbolader mit einem Turbinengehäuse mit zwei Abgasfluten, zwischen denen eine Trennwand vorgesehen ist, und die eine gemeinsame Wastegate-Öffnung aufweisen. Das Turbinengehäuse ist mit einem Linearventil ausgestattet, welches ein Ventilelement und einen Verstellschaft zur Betätigung des Ventilelements aufweist. Die Turbine ist dadurch gekennzeichnet, dass der Verstellschaft des Linearventils in einer Trennwandebene durch die Trennwand geführt ist und in Richtung seiner Schaft-Längsachse in der Trennwand beweglich angeordnet ist, wobei das Ventilelement in einer Trennwand-Aussparung zwischen den Abgasfluten angeordnet ist und aus dem Bereich der Abgasfluten, in Richtung auf die Wastegate-Öffnung hin, gegen einen Ventilsitz geführt ist, der auf der den Abgasfluten zugewandten Innenseite der Wastegate-Öffnung ausgebildet ist.
Abstract:
Provided is an exhaust porting apparatus (10) for a turbocharged internal combustion engine (4) which includes a turbocharger (6) that is conventionally arranged in fluid communication with the exhaust (8), the turbo in turn facilitating forced air induction back into the engine via air intake (5). The apparatus (10) comprises a housing (12) that defines an inlet port (14) and an outlet port (16). The apparatus (10) also includes a valve member 18 which is arranged within the housing (12). The valve member (18) is generally displaceable between a high-velocity gas inlet position, wherein the valve member (18) allows unobstructed fluid flow between the inlet and outlet ports (14) and (16), and a low-velocity gas inlet position, wherein the valve member (18) obstructs fluid flow through the outlet port 16 whilst allowing unobstructed fluid flow into the inlet port (14). The apparatus (10) further includes an actuator (20) which is generally configured for dynamically actuating the valve member (18) between the low- and high-velocity gas inlet positions. In this manner, when the inlet and outlet ports (14) and (16) operatively arranges the housing (12) in fluid communication with the engine's exhaust (8), dynamic actuation of the valve member (18) enables an increase in exhaust gas velocity via the outlet port 16 into the turbocharger (6) by means of the Venturi effect.
Abstract:
Herein an internal combustion engine (2) comprising at least one cylinder arrangement (4) forming a combustion chamber (23) is disclosed. The engine (2) further comprises at least one turbine (21) comprising a turbine wheel (26) and having a turbine wheel inlet area, A TIN . An exhaust conduit (6) extends from a port (15) arranged in a lower half of a cylinder bore (12) of the cylinder arrangement (4) to the turbine wheel inlet area, A TIN . The piston (10) has different piston stroke lengths, the power and exhaust strokes being longer than the intake and compression strokes, such that the port (15) is uncovered by the piston (10) during part of the power and exhaust strokes and is covered by the piston (10) during the intake and compression strokes.
Abstract:
Herein a four stroke internal combustion engine (2) is disclosed. The internal combustion engine (2) comprises at least one cylinder arrangement (4), an exhaust conduit (6), and at least one turbine. The cylinder arrangement (4) comprises an exhaust port arrangement (14), configured to open and close an exhaust flow area, A CYL . The cylinder arrangement (4) has a maximum volume, V MAX . The exhaust conduit (6) extends between the exhaust flow area, A CYL , and a turbine wheel inlet area, A™, of the turbine and has an exhaust conduit volume, V EXH . The exhaust conduit volume, V EXH , is≤ 0.5 times the maximum volume, V MAX . The exhaust port arrangement (1 4) is configured to expose the exhaust flow area, ACYL, at a size of at least 0.22 times the maximum volume, V MAX , when a piston (10) of the cylinder arrangement (4) is at the bottom dead centre, BDC.