Abstract: A variable compression ratio apparatus for an engine receiving combustion force of an air-fuel mixture from a piston and rotating a crankshaft, and for changing compression ratio of the air-fuel mixture.

Abstract: A hydraulic pressure variable valve lift apparatus may include a housing that a piston chamber that one side thereof is opened is formed, a valve operating piston that is slidably disposed in the piston chamber and one end thereof is connected to a valve for opening/closing a port, and an EHV hydraulic pump that is configured to supply the piston chamber with oil, wherein a first oil passage is formed between the EHV hydraulic pump and the piston chamber on as to supply a side surface of the piston chamber with oil, and an orifice hole is formed from a piston side surface of the valve operating piston to a piston upper end surface. Accordingly, the valve lift amount can be varied according to the operating condition of the engine, a hydraulic pressure variable valve lift apparatus reduces an impact at a moment when the valve is closed by having a valve lift formed a ramp profile and does not require accurate process of multi orifice and thereby decreases a production cost.

Abstract: Power consumption for maintaining a target valve timing and noise in operation is reduced by a continuously variable valve timing apparatus including a camshaft holder fixed to a camshaft, a cam sprocket, a leadscrew screw-coupled with the camshaft holder and the cam sprocket and is movable so as to rotate the camshaft holder and the cam sprocket in opposite directions, and an operating unit operated by a motor and moves the leadscrew.

Abstract: A variable valve lift apparatus includes a high cam and a low cam fixed side by side to a camshaft, an outer body pressed by the rotation of the high cam, and has a crossbar formed at the bottom of the front end, an inner body, of which the front end protrudes further than the outer body, the lower front end is provided with a valve member, the upper rear end is hinged to a lost motion hinge shaft coaxially with the rear end of the outer body, and the lower rear end is pivotally connected to a hinge member, and a latching portion inserted into the inner body and selectively connected to the crossbar of the outer body to move the inner body dependent on movement of the front end of the outer body, wherein the lost motion hinge shaft is disposed in the same direction as a hinge point between the inner body and the hinge member with respect to the camshaft.

Abstract: A variable valve lift apparatus including an inner tappet, an outer tappet surrounding and slidably contacting the inner tappet, and a latching pin slidably inserted into the inner tappet so as to implement a high lift and a low lift by selectively joining the inner tappet and the outer tappet may include a stopper partially inserted into the outer tappet and spaced apart from the latching pin in a movement direction of the latching pin so as to limit movement of the latching pin, and forming a latching pin joining groove in the outer tappet to selectively receive the latching pin, wherein the stopper partially projects to the outside of the outer tappet and is slidably engaged to a cylinder head groove formed to a cylinder head bore to prevent the variable valve lift apparatus from being rotated.

Abstract: A system for correcting turbo lag may include an engine provided with a plurality of cylinders, an intake manifold for supplying air to the plurality of cylinders, and an exhaust manifold for exhausting exhaust gas generated in the plurality of cylinders, an intake passage connected to the intake manifold so as to supply fresh air to the intake manifold, an exhaust passage connected to the exhaust manifold so as to exhaust the exhaust gas gathered in the exhaust manifold, a turbo charger provided with a turbine mounted at the exhaust manifold or the exhaust passage and rotated by the exhaust gas and a first compressor mounted at the intake passage and connected to the turbine so as to rotate with the turbine and compress the air of the intake passage, a bypass passage branching off at a first point of the intake passage and joining the intake passage at a second point of the intake passage downstream of the first point, a second compressor mounted at the bypass passage and compressing the air passing through

Abstract: A system for correcting turbo lag may include an engine provided with a plurality of cylinders, an intake manifold for supplying air to the plurality of cylinders, and an exhaust manifold for exhausting exhaust gas generated in the plurality of cylinders, an intake passage connected to the intake manifold so as to supply fresh air to the intake manifold, an exhaust passage connected to the exhaust manifold so as to exhaust the exhaust gas gathered in the exhaust manifold, a turbo charger provided with a turbine mounted at the exhaust manifold or the exhaust passage and rotated by the exhaust gas and a first compressor mounted at the intake passage and connected to the turbine so as to rotate with the turbine and compress the air of the intake passage, a bypass passage branching off at a first point of the intake passage and joining the intake passage at a second point of the intake passage downstream of the first point, a second compressor mounted at the bypass passage and compressing the air passing through

Abstract: A continuously variable valve lift device may include a vibration link having one end eccentrically and rotatably coupled to a rotation shaft, a rocker arm having a middle portion pivotally coupled to the other end of the vibration link, an advance lever having one end coupled to the one end of the rocker arm to select advance or delay, a swivel cam link having one end pivotally coupled to the other end of the rocker arm, and a swivel cam, one end of which is pivotally coupled to the other end of the swivel cam link and the other end of which is pivotally coupled to a stationary shaft to open and close a valve.

Abstract: A cylinder head having a water jacket may include a cylinder head in which a combustion chamber may be formed, and a protruding portion that may be integrally formed with the cylinder head and an exhaust outlet portion may be formed in an outer surface thereof to communicate with the combustion chamber, wherein the water jacket may be formed inside the protruding portion at an upper side and a lower side of an exhaust passage that may be aligned through the exhaust outlet portion, the water jacket having an upper water jacket formed between the upper side of the exhaust passage and an upper surface of the protruding portion, a lower water jacket formed between the lower side of the exhaust passage and a lower surface of the protruding portion, and a connection water jacket connecting the upper water jacket and the lower water jacket in the protruding portion.

Abstract: A variable valve lift apparatus of an engine may include an inner tappet, an outer tappet centrally receiving the inner tappet, a latching unit inserted in the inner tappet and operated by a hydraulic pressure so as to selectively engage the inner and outer tappets by operation, and a protruding member that is coupled to an upper surface edge of the outer tappet so as to protrude outward from an exterior circumference of the outer tappet, and is vertically slidable along a sliding groove of a cylinder head.

Abstract: A hydraulic orifice which is mounted at a head oil journal formed in a cylinder head and supplies an oil to a supply line after reducing pulsation of the oil supplied to the head oil journal, may include a body pressed on the head oil journal so as to form a chamber with the cylinder head, a joining line formed along a longitudinal axis of the body therein and fluid-communicating with the supply line, and at least two hydraulic lines formed in the body and connecting the chamber with an end of the joining line in the body to supply the oil through the other end thereof to the supply line, wherein the oils passing through the at least two hydraulic lines are joined at the end of the joining line with different phases such that the pulsation of the oil in the joining line is reduced.

Abstract: A variable valve lift apparatus may include a camshaft, a low lift cam which may be connected to the camshaft and rotates, a high lift cam which may be rotatably mounted to the camshaft and may be selectively connected to the camshaft to rotate with the camshaft, a high lift cam connecting portion which selectively connects the high lift cam to the camshaft, and a tappet including a low lift cam contact portion contacting the low lift cam and a high lift cam contact portion selectively activating the high lift cam.

Abstract: The present invention provides to a rocker arm apparatus for cylinder deactivation with a new structure for increasing fuel efficiency in a gasoline engine. For this, the present invention provides a rocker arm apparatus for cylinder deactivation including: a rocker arm; a restoring spring supported at the bottom of a rear end portion of the rocker arm; a roller coupled to the rocker arm to be pressed by a cam; a pair of rocker shaft assemblies each including first and second rocker shafts, and a connecting rod integrally connecting the first and second rocker shafts; a pair of rocker shaft support members connected to the rocker arm by means of the first and second rocker shafts; and a transfer member for controlling the rocker shaft assembly.

Abstract: An electro-hydraulic variable valve lift apparatus may includes a housing having a housing protruding portion is formed therewithin, a driving cam, a pump piston which forms a main chamber with the housing, reciprocates within the housing according to rotation of the driving cam, and forms hydraulic pressure within the main chamber, a pump piston elastic portion disposed for elastically supporting the pump piston, an oil pressure controller communicated with the main chamber in order to control hydraulic pressure within the main chamber, a hydraulic piston slidably disposed within the housing and connected with a valve, a multiple orifice unit slidably disposed within the hydraulic piston and forms an auxiliary chamber with the hydraulic piston, and the multiple orifice unit of which an orifice hole communicating the main chamber with the auxiliary chamber is formed thereto, and an orifice unit elastic portion disposed within the auxiliary chamber to elastically support the multiple orifice unit.

Abstract: An electro-hydraulic variable valve lift apparatus includes a housing, a driving cam, a pump piston which forms a main chamber with the housing, reciprocates within the housing according to rotation of the driving cam, and forms hydraulic pressure within the main chamber, a pump piston elastic portion disposed for elastically supporting the pump piston, an oil pressure controller communicating with the main chamber in order to control hydraulic pressure within the main chamber, a hydraulic piston slidably disposed within the housing, includes a first body having a first diameter and a second body having a second diameter larger than the first diameter, and is connected with a valve, and a piston guide disposed between the housing and the hydraulic piston for guiding the hydraulic piston.

Abstract: A variable compression ratio apparatus may include a connecting rod provided with one end formed of a mounting hole and the other end eccentrically and rotatably connected to a crankshaft, wherein a piston pin may be inserted in the mounting hole and the connecting rod may be rotatably connected to the piston through the piston pin, an eccentric link provided with an eccentric bearing concentrically and rotatably mounted in the mounting hole may be connected and, the piston pin being eccentrically and rotatably mounted in the eccentric bearing, a variable link pivotally connected to the eccentric link, a variable gear link pivotal with respect to a fixed shaft and having a first gear teeth at an exterior circumference thereof, an external circumferential portion thereof being rotatably connected to the variable link, and a control shaft formed of a second gear teeth engaged to the first gear teeth.

Abstract: The CVVL device includes a rocking cam having a rolling face contacting a rocker arm is formed to press the rocker arm when pivoted, a rocking roller, which is disposed above the drive cam and rolls on an outer circumference of the drive cam, a control apparatus, which changes a position of the rocking roller rolling on the outer circumference of the drive cam; and a rocking apparatus, which pivots the rocking cam according to a position of the rocking roller such that a position where the rocker arm is contacted with the rolling face is changed depending on the position of the rocking roller.

Abstract: A variable turbocharger including a turbine housing, a first scroll fluidly communicating with a turbine, a second scroll formed along an outside of the first scroll, wherein the first scroll and the second scroll are disposed within the turbine housing for exhaust gas to exhaust through the turbine, a partitioning unit for selectively separating the first scroll and the second scroll, and a a flux control valve disposed at the exhaust gas inflow portion and selectively coupled to the partitioning unit for blocking the exhaust gas from flowing into the second scroll. The variable turbocharger may prevent turbo lag at a low speed and be highly efficient at a high speed.

Abstract: A variable compression ratio apparatus may include an external piston, a piston pin mounted in the external piston and a connecting rod, including an internal piston including a slot and sliding in an interior circumference of the external piston, wherein the piston pin passes through the internal piston and the external piston, a latching pin passing through the piston pin and selectively sliding therein, variable sliders disposed to selectively contact one of both ends of the latching pin, at both sides thereof to push the one of the both ends to the opposite side, and a support plate slidably supporting the variable sliders such that the variable sliders reciprocate perpendicular to length direction of the latching pin, wherein one end of a connecting arm selectively rotating may be connected to the variable slider and a sliding direction of the variable sliders may be controlled by rotation of the connecting arm.

Abstract: A variable compression ratio apparatus may include a connecting rod rotatably connected to the piston and the other end being eccentrically and rotatably connected to the crankshaft, an eccentric bearing link, a control link having both ends and a middle portion, the one end being rotatably connected to the other end of the eccentric bearing link, a first shake link having both ends, the one end being rotatably connected to the middle portion of the control link, a second shake link having both ends, the one end being rotatably connected to the other end of the control link, and a control shaft eccentrically connected to a first eccentric cam rotatably connected to the other end of the first shake link and a second eccentric cam rotatably connected to the other end of the second shake link respectively, and rotating together with the first and second eccentric cams.