Abstract: An air intake control system for an engine, which is disposed in an intake line between a compressor of a turbocharger and an intake manifold and adjusts and controls air intake may include a motor for providing torque, a bypass line with a first end connected to the intake line and a second end connected to an external air line for delivering external air into the compressor, and a flow control valve assembly disposed at a divergent point from the intake line to the bypass line and selectively distributing air intake from the compressor to the intake manifold and the bypass line by adjusting a degree of opening of valve members in accordance with an amount of revolution of the motor.

Abstract: An air intake control system for an engine, which is disposed in an intake line between a compressor of a turbocharger and an intake manifold and adjusts and controls air intake may include a motor for providing torque, a bypass line with a first end connected to the intake line and a second end connected to an external air line for delivering external air into the compressor, and a flow control valve assembly disposed at a divergent point from the intake line to the bypass line and selectively distributing air intake from the compressor to the intake manifold and the bypass line by adjusting a degree of opening of valve members in accordance with an amount of revolution of the motor.

Abstract: A method for managing an oil level for a vehicle includes a key-on process of judging whether the vehicle is in a key-on state or more, a preparation process of judging whether the temperature of engine oil of the vehicle and an engine rpm are within predetermined ranges, a comparison process of comparing the level of the engine oil with a level table additionally provided by continuously measuring the level of the engine oil for a predetermined time when the engine oil is within the predetermined range, and a warning process of giving warning when the level of the engine oil is larger than the value of the level table as a result of the comparison, and a system for managing an oil level for a vehicle.

Abstract: A closed crankcase ventilation system in which blow-by gas is introduced into an oil separator through a blow-by gas blowout opening provided in a truss structure of a cylinder block. A diaphragm is established in the truss structure of the cylinder block to close a portion of an oil hole portion returned from a cylinder head on the top thereof, thus preventing oil from flowing backward. An oil drain portion returns oil separated in the oil separator to an oil pan, and a gas recycling portion supplies blow-by gas separated in the oil separator to an intake manifold.

Abstract: A closed crankcase ventilation system in which blow-by gas is introduced into an oil separator through a blow-by gas blowout opening provided in a truss structure of a cylinder block. A diaphragm is established in the truss structure of the cylinder block to close a portion of an oil hole portion returned from a cylinder head on the top thereof, thus preventing oil from flowing backward. An oil drain portion returns oil separated in the oil separator to an oil pan, and a gas recycling portion supplies blow-by gas separated in the oil separator to an intake manifold.