A phase adjuster assembly is disclosed herein that is configured to adjust a phase between a driving component and driven component of an internal combustion engine. The phase adjuster assembly includes an input gear configured to be driven by the driving component and an output gear configured to drive the driven component. A piston plate assembly is configured to adjust a phase between the driving component and the driven component via axial displacement of the piston plate assembly. A hydraulic fluid system is configured to selectively provide hydraulic fluid to a first piston control chamber on a first side of the piston plate assembly and to a second piston control chamber on a second side of the piston plate assembly to axially displace the piston plate assembly such that the phase between the driving component and the driven component is adjusted.

Provided is an engine, including: a cylinder; a piston accommodated in the cylinder; a combustion chamber facing the piston; a sliding portion (large-diameter portion) configured to perform a stroke motion together with the piston; a hydraulic surface of the sliding portion facing a side opposite to the combustion chamber; a hydraulic chamber, which the hydraulic surface faces; and an auxiliary hydraulic chamber, which communicates with the hydraulic chamber, and has a volume changeable in accordance with a hydraulic pressure in the hydraulic chamber.

A variable compression device includes a piston rod, a first fluid chamber configured to move the piston rod in a direction in which a compression ratio is increased by supplying a pressurized working fluid thereto, a regulation member configured to regulate movement of the piston rod in a direction in which a compression ratio is increased, a second fluid chamber provided between the piston rod and the regulation member and configured to store the working fluid, a supply flow path configured to guide the working fluid supplied to the second fluid chamber, a discharge flow path configured to guide the working fluid discharged from the second fluid chamber, and a flow rate regulation unit provided in the discharge flow path and configured to regulate a flow of the working fluid when the piston rod approaches the regulation member.

The present invention concerns a method for providing a variable compression ratio in a combustion engine, where the combustion chamber (9) is formed substantially by a piston bowl in the main piston (1), comprising a secondary piston (3) being displaceable against spring action between an upper/outer position which provides minimal volume of the combustion chamber (9) and a lower/inner position which provides maximum volume of the combustion chamber (9), or in a position therebetween depending on introduced air mass before the compression stroke. The method is characterized in arranging said secondary piston (3) resting on a spring (5) with substantially constant spring force adapted such that introduced air mass is to be compressed to a predetermined pressure at the end of the compression stroke. The invention also concerns a corresponding device and a diesel engine comprising such a device.

The invention in question relates, in particular, to a hydraulic variable compression ratio piston comprising a full floating eccentric mounted in the body of said piston, wherein the eccentric accepts a piston pin, with the pin in turn, accepting the small end of the connecting rod. The eccentric moves in a circular manner against the force of preloaded springs installed at the bottom of the piston, thereby allowing the piston to move up or down relative to the connecting rod. An adjustment mechanism within the piston comprising of a combination of said preloaded springs and a lifter acting against the movement of the eccentric, holds the piston's current position relative to the connecting rod until an increase or decrease in combustion forces act upon the piston and changes the compression ratio.

The invention in question relates, in particular, to a hydraulic variable compression ratio piston comprising a full floating eccentric mounted in the body of said piston, wherein the eccentric accepts a piston pin, with the pin in turn, accepting the small end of the connecting rod. The eccentric moves in a circular manner against the force of preloaded springs installed at the bottom of the piston, thereby allowing the piston to move up or down relative to the connecting rod. An adjustment mechanism within the piston comprising of a combination of said preloaded springs and a lifter acting against the movement of the eccentric, holds the piston's current position relative to the connecting rod until an increase or decrease in combustion forces act upon the piston and changes the compression ratio.

The present disclosure relates to a system for controlling ignition of an intake charge directed into an internal combustion engine. The system may have a movable component operably associated with at least one of a piston of the engine or a combustion chamber of the engine. The movable component may be tuned to deflect in response to a predetermined pressure being reached in a cylinder in which the piston is housed. The movable component operates to deflect in response to the predetermined pressure being reached in the cylinder as the piston travels toward top dead center during its compression stroke, to change a compression ratio of the engine.

The invention relates to a method for operating a reciprocating piston machine, particularly an internal combustion engine, having at least one piston rod that is hydraulically adjustable in length for setting a compression ratio, wherein the piston rod comprises a piston and a hydraulic cylinder for adjusting its length, wherein the piston with the hydraulic cylinder delimits at least one working chamber, through the fill level of which at least two switching positions of the piston rod are possible, wherein independently from the setting of the compression ratio the working chamber is at least partially filled and emptied as a function of at least one first predetermined requirement to effect an at least partial exchange of a hydraulic medium in the at least one working chamber.

The present disclosure relates to a system for controlling ignition of an air/fuel mixture intake charge directed into an internal combustion engine. The system may have a longitudinally movable inner cylinder liner configured to fit within a cylinder wall portion of an internal combustion engine, and able to receive a piston of the engine therein. A portion of the inner cylinder liner defines an internal volume forming a combustion chamber, and the internal volume controls a compression ratio of the cylinder. The system also has a cylinder head assembly operatively associated with the inner cylinder liner and able to move linearly to cause longitudinal displacement of the inner cylinder liner relative to the cylinder wall portion. This enables the volume of the combustion chamber to be further varied, to thus further vary the compression ratio.

A movable piston head is provided; the piston head has a head cylinder and a upper piston, a first port and a second port on the head cylinder wall, a first path and a second path in the upper piston, when the first port aligns with the first path horizontally, or the second port aligns with the second path horizontally, the combustion chamber is communicating with external, the upper piston moves up and down to perform intake, exhaust, compression, seal the combustion chamber from external. A variable compression ratio engine and a shifted minimum combustion chamber volume engine are provided. Fuel efficiency is improved and manufacturing cost is reduced, different working sequences and compression ratio control are also provided in the invention.