Abstract:
An ignition apparatus of an engine includes a spark plug disposed in a combustion chamber, and configured to generate a spark discharge between a center electrode and a ground electrode, a plurality of ignition coils each applying a current to the spark plug and including a primary coil, a secondary coil, a main switch, and an auxiliary switch, and a controller selectively performing a multi-stage ignition through a first ignition coil and a second ignition coil or a single-stage ignition through one ignition coil among the first ignition coil and the second ignition coil, adjusting a charging speed, a number of discharges, and a discharge maintaining period of the ignition coil depending on a driving point of the engine, and adjusting the charging speed of the ignition coil and a target air/fuel ratio for performing a lean combustion, based on a state of charge of a battery.
Abstract:
A dual spark plug may include: a metal body made of metal material, an insulating body provided inside of the metal body and made of an insulating material, a pair of central electrodes provided inside of the insulating body and electrically connected with an ignition coil, and a pair of ground electrodes respectively extended from both ends the metal body, and spaced apart from ends of the pair of central electrodes by a predetermined distance.
Abstract:
A variable compression ratio apparatus may include a crankshaft, a connecting rod, first and second eccentric links mounted at both sides of the connection rod, respectively, and having one ends at which the piston pin may be eccentrically and rotatably installed, a swing link of which one end may be branched into two parts to form first and second branches, the first and second branches being connected to the other ends of the first and second eccentric links, and a control device connected to the other end of the swing link to control the swing link, wherein the crank arm includes guide surfaces formed in a predetermined thickness at an inner circumferential surface of the crank arm so that the first and second branches of the swing link slide to move between the guide surfaces.
Abstract:
A pre-chamber structure for a piston engine may include: a pre-chamber combustion chamber in which a mixture of fuel and air is combusted and a pre-chamber compression chamber including a sub-chamber communicating with the pre-chamber combustion chamber and having an inclined wall surface, and a main chamber extending from the sub-chamber, thereby preventing the fuel from being adsorbed and remaining in the wall surface of the pre-chamber compression chamber in a droplet state.
Abstract:
Enclosed is an ignition device for an internal combustion engine. The ignition device includes a coil unit including a plurality of coil modules each of which includes a primary coil and a secondary coil, a cable commonly connected to each of opposite ends of the secondary coils of each of the coil modules of the coil unit, spark plugs each of which is connected to the cable and installed in one of combustion chambers having the same phase, and a controller provided to sequentially switch power supplied from a power source to the primary coils of each coil module of the coil unit.
Abstract:
A multiple variable valve lift apparatus connected with a valve opening and closing unit which is adapted to rolling-contact one end thereof with a cam and is operated to open or close by a rotation of the cam, and operating to select the cam which is rolling-contacted with the valve opening and closing unit for changing a valve lift, may include a normal cam rolling-contacting with the valve opening and closing unit so as to realize a normal lift of a predetermined valve, and a low cam rolling-contacting with the valve opening and closing unit so as to realize a valve lift which is lower and longer than the normal lift realized by the normal cam, wherein the normal cam or the low cam is selectively rolling-contacted to the valve opening/closing unit according to a driving state.
Abstract:
A multiple variable valve lift apparatus may include a camshaft rotating by drive of an engine, at least two cam portions disposed on the camshaft to be movable along an axial direction of the camshaft and to be rotated together with the camshaft, and forming a high cam and a low cam, a valve opening/closing unit operated by one of the high cam or the low cam formed at the cam portion, an operating unit disposed on the camshaft to move together with one of the at least two cam portions, a solenoid selectively moving the operating unit along an axial direction of the camshaft, a interlock unit rotating together with the camshaft, and disposed between one and the other of the cam portions on the camshaft to be movable along an axial direction of the camshaft, and a pin operating unit selectively moving the interlock unit along the camshaft.
Abstract:
A multiple variable valve lift apparatus may include a camshaft, a plurality of cams slidably fitted on the camshaft and each having a cam base with a guide groove and a cam lobe, a solenoid valve including an actuating rod capable of being selectively inserted into the guide groove of a cam in the plurality of cams, and a valve opening/closing unit capable of selectively coming in contact with any cam in the plurality of cams.
Abstract:
A spark ignition engine includes a main combustion chamber configured to suction a mixture through an intake port, a pre-chamber configured to communicate with the main combustion chamber, an auxiliary cylinder configured to communicate with the main combustion chamber via the pre-chamber, an auxiliary intake passage connecting the auxiliary cylinder and the intake port, an auxiliary piston, and a spark plug configured to ignite the mixture in the pre-chamber. The auxiliary piston is configured to slidably reciprocate in the auxiliary cylinder such that the mixture is suctioned from the intake port via the auxiliary intake passage and the mixture is discharged to the main combustion chamber via the pre-chamber.
Abstract:
An ignition coil control system includes: a first ignition coil; a second ignition coil; a spark plug generating spark discharge by a discharge current generated in the first ignition coil and the second ignition coil; and an ignition controller that controls spark discharge of the electrode by adjusting an amount and duration of the discharge current of the first ignition coil and the second ignition coil based on a step pulse signal including different voltages transmitted from an engine control unit (ECU).