Abstract: An evaporated gas leak diagnosis method using an active purge pump is provided to detect a leak of the evaporated gas from a canister in a fuel system. The method includes diagnosing a failure of an active purge pump based on a signal generated by a pressure sensor installed on a vent line that extends from the canister to the atmosphere. The active purge pump is mounted on a purge line for connecting the canister with an intake pipe.

Abstract: A leakage diagnosis supplement method for a failure of a vacuum pump using an active purge pump may include: determining whether or not the vacuum pump mounted on a vent line between a canister and an atmosphere fails; reverse-rotating the active purge pump mounted on a purge line connecting the canister and an intake pipe to each other; determining whether or not an absolute value of internal pressure in a fuel tank is less than a specific value; and checking a leakage in the fuel system including the canister and the fuel tank.

Abstract: An evaporated gas leak diagnosis method using an active purge pump is provided to detect a leak of the evaporated gas from a canister in a fuel system. The method includes diagnosing a failure of an active purge pump based on a signal generated by a pressure sensor installed on a vent line that extends from the canister to the atmosphere. The active purge pump is mounted on a purge line for connecting the canister with an intake pipe.

Abstract: A leakage diagnosis supplement method for a failure of a vacuum pump using an active purge pump may include: determining whether or not the vacuum pump mounted on a vent line between a canister and an atmosphere fails; reverse-rotating the active purge pump mounted on a purge line connecting the canister and an intake pipe to each other; determining whether or not an absolute value of internal pressure in a fuel tank is less than a specific value; and checking a leakage in the fuel system including the canister and the fuel tank.

Abstract: A vehicle and a control method thereof are provided. The vehicle includes an engine, a catalytic converter including catalyst for purifying exhaust gas discharged from the engine and a sensing unit that is disposed between the engine and the catalytic converter. The sensing unit outputs an electrical signal in response to sensing of gas and a controller starts the engine based on the electrical signal output from the sensing unit and a mileage of the vehicle.

Abstract: A system and method of stabilizing combustion in the engine of a hybrid electric vehicle. The system includes a controller controlling a starter and an injector, wherein the controller causes the starter to rotate the engine without fuel injection before starting the engine after an engine starting condition is satisfied or after an engine stop condition is satisfied and the engine is stopped.

Abstract: An apparatus and a method for controlling a valve includes a first database which stores a plurality of first exhaust cam angles and outputs a first exhaust cam angles corresponding to a current engine speed and inflow air amount. A second database stores a plurality of second exhaust cam angles and outputs a second exhaust cam angles corresponding to the engine speed and inflow air amount. A target angle decision unit selects the exhaust cam angles outputted from the first and second databases as a target angle for controlling an operation of an exhaust valve, in accordance with a current gear stage of a vehicle. A camshaft control unit controls rotational motion of a camshaft coupled to the exhaust cam so that the exhaust cam reaches the target angle, in which the plurality of first exhaust cam angles are in a range in which the exhaust cam is not retarded.

Abstract: A vehicle and a control method thereof are provided. The vehicle includes an engine, a catalytic converter including catalyst for purifying exhaust gas discharged from the engine and a sensing unit that is disposed between the engine and the catalytic converter. The sensing unit outputs an electrical signal in response to sensing of gas and a controller starts the engine based on the electrical signal output from the sensing unit and a mileage of the vehicle.

Abstract: A system and method of stabilizing combustion in the engine of a hybrid electric vehicle. The system includes a controller controlling a starter and an injector, wherein the controller causes the starter to rotate the engine without fuel injection before starting the engine after an engine starting condition is satisfied or after an engine stop condition is satisfied and the engine is stopped.

Abstract: An apparatus and a method for controlling a valve includes a first database which stores a plurality of first exhaust cam angles and outputs a first exhaust cam angles corresponding to a current engine speed and inflow air amount. A second database stores a plurality of second exhaust cam angles and outputs a second exhaust cam angles corresponding to the engine speed and inflow air amount. A target angle decision unit selects the exhaust cam angles outputted from the first and second databases as a target angle for controlling an operation of an exhaust valve, in accordance with a current gear stage of a vehicle. A camshaft control unit controls rotational motion of a camshaft coupled to the exhaust cam so that the exhaust cam reaches the target angle, in which the plurality of first exhaust cam angles are in a range in which the exhaust cam is not retarded.