6results about "Valve control" patented technology

The present invention relates to a method for operating a gas-powered internal combustion engine during a shutdown process of the gas-powered internal combustion engine, comprising the steps of: Closing a safety valve (3) which interrupts a connection to a gas tank (2), Opening a valve (5) on a first combustion chamber (11) of the gas internal combustion engine to release a connection to an exhaust tract (6), to generate a throttling loss when the gas engine is switched off and to increase the load on the gas engine, wherein no fuel gas is supplied to the first combustion chamber (11) from a line section (4) connecting the safety valve (3) to the first combustion chamber (11), and combustion of fuel gas in a second combustion chamber (12), wherein the consumption of fuel gas is increased by the increased load generated in the first combustion chamber (11).

To provide a device improving the startability of an internal combustion engine.SOLUTION: An internal combustion engine is equipped with a crank shaft 31, a first cylinder 7 and a second cylinder 8, and a decompression device that decompresses the first cylinder and the second cylinder after rotation starting and increases the decompression amount of the second cylinder as compared with the decompression amount of the first cylinder. A plurality of valves is provided, which opens and intercepts combustion chambers of the first cylinder and the second cylinder to the outside. The decompression device, in a compression stroke of the internal combustion engine, drives the plurality of valves so as to increase an opening period of the second cylinder, as compared with an opening period of the first cylinder.SELECTED DRAWING: Figure 1

The valve actuation system includes a cylinder deactivation controller operably connected to and in fluid communication with the intake and exhaust deactivation device for at least one cylinder. The valve actuation system further includes an engine brake controller operably connected to and in fluid communication with the engine brake actuator for the at least one cylinder. The brake-dependent deactivation controller is disposed between the cylinder deactivation controller and the intake deactivation device and is in fluid communication with the cylinder deactivation controller and the intake deactivation device and is in fluid communication with the engine brake controller via a control input. The brake-dependent deactivation controller is configured, based on the control input, to allow hydraulic fluid flow in a hydraulic fluid control passage for the intake deactivation device when in a non-1.5-stroke engine braking mode in a first state and to vent the hydraulic fluid control passage for the intake deactivation device when in a 1.5-stroke engine braking mode in a second state.

A valve actuation system comprises a cylinder deactivation controller operatively connected to and in fluid communication with intake and exhaust deactivators for at least one cylinder. The valve actuation system further comprises an engine braking controller operatively connected to and in fluid communication with the engine braking actuators for the at least one cylinder. A braking-dependent deactivator controller is disposed between and in fluid communication with the cylinder deactivation controller and the intake deactivators, and in fluid communication with the engine braking controller via a control input. The braking-dependent deactivator controller is configured, in a first state based on its control input, to permit hydraulic fluid flow in hydraulic fluid control passages for the intake deactivators when in a non-1.5-stroke engine braking mode and, in a second state, to vent the hydraulic fluid control passages for the intake deactivators when in a 1.5-stroke engine braking mode.

There is provided an internal combustion engine (E) including: a crankshaft (31); a first cylinder (7) and a second cylinder (8); and a decompression device (9) configured to reduce the pressures inside the first cylinder and the second cylinder at a time when the internal combustion engine starts to rotationally drive as compared with the pressures inside the first cylinder and the second cylinder at a time after the internal combustion engine starts to rotationally drive. The decompression device is configured such that, at the time when the internal combustion engine starts to rotationally drive, a decompression amount in the second cylinder is greater than a decompression amount in the first cylinder.

The present invention relates to a method for operating a gas internal combustion engine during a switching-off operation of the gas internal combustion engine, comprising the steps of: closing a safety valve (3), which interrupts a connection to a gas tank (2), opening a valve (5) at a first combustion chamber (11) of the gas internal combustion engine in order to release a connection to an exhaust gas tract (6) in order to produce a throttle loss when the gas internal combustion engine is switched off and to increase a load of the gas internal combustion engine, with no combustion gas from a line region (4), which connects the safety valve (3) to the first combustion chamber (11), being supplied to the first combustion chamber (11), and burning combustion gas in a second combustion chamber (12), with an increased amount of combustion gas being used by the increased load generated in the first combustion chamber (11).