Abstract: A device and a method for diagnosing a positive crankcase ventilation (PCV) breather line. The device includes: a crankcase pressure sensor that is installed on the PCV breather line including a front end connected to an intake line and a rear end connected to a crankcase and detects a pressure inside the crankcase; and a processor that diagnoses an abnormality of the PCV breather line based on the pressure of the crankcase.

Abstract: A cold start split injection control method is provided. The method includes a split injection controller which determines cold start conditions of an engine system, an injection mode control which performs a cold start split injection by an operation of an injector and an injection malfunction diagnostic control which performs an injection malfunction diagnostic with any one or more among an injector opening angle, an injector operating time, and the number of injector operation times which are measured through the fuel injection of the injector.

Abstract: The present disclosure provides a structure having a low reflectance surface, wherein the structure comprises: a base plate; and a plurality of inclined rods protruding from a first face of the base plate and inclined relative to a normal line to the first face, wherein the inclined rods are spaced from each other. Travel paths of light beams in the structure may be longer along the inclined rods. As a result, a larger amount of light may be absorbed by the structure having a low reflectance surface. The amount of light-beams as reflected from the structure having a low reflectance surface may be significantly reduced.

Abstract: A method for diagnosing failure of a cold start E/M reduction system confirms the change in the torque reserve compared to the torque reserve confirmed for the ignition timing upon cold start by any one of an operation of an electric load device, an operation of an alternator, an operation of a purge valve, an operation of an air conditioner, a shift state of a transmission, and a coolant temperature state of an engine, and confirms the failure or normality of any one of the electric load device, the alternator, the purge valve, and the air conditioner is normal or failed using the change in the torque reserve to apply the confirmed result to determine whether the cold start E/M reduction system is abnormal, securing failure diagnosis accuracy for the components for the cold start E/M reduction.

Abstract: A vehicle may include a cluster and an engine control unit (ECU), where the cluster may generate a travel distance signal that indicates a travel distance detected by a vehicle speed sensor, and the ECU may be configured to set a travel distance at the time of an immediately previous key-OFF as a current travel distance when the travel distance signal indicates the initial value at the time of an ignition-ON, and to set the temporary previous travel distance and the temporary current travel distance as a previous travel distance and the current travel distance, respectively, when a temporary previous travel distance prior to a current time point by a predetermined period and a temporary current travel distance at the current time point are greater than or equal to the set current travel distance.

Abstract: A thermostat misdiagnosis prevention method applied to an engine system of the present disclosure applies high speed/high load and low speed/low load, which are divided by a vehicle speed and an engine output detected from the engine system at an engine warm-up temperature of engine coolant, as monitoring conditions of a thermostat, and determines thermostat fail by primarily determining the thermostat fail with the engine coolant temperature of the engine coolant temperature and the outside air temperature detected from the engine system, then confirming a delay time with respect to the outside air temperature, and secondarily determining the thermostat fail with the engine coolant temperature in a monitoring ECU, thereby corresponding to the enhanced OBD together with preventing the misdiagnosis of the thermostat by the fail-safe according to the primary and secondary determinations.

Abstract: A cold start split injection control method is provided. The method includes a split injection controller which determines cold start conditions of an engine system, an injection mode control which performs a cold start split injection by an operation of an injector and an injection malfunction diagnostic control which performs an injection malfunction diagnostic with any one or more among an injector opening angle, an injector operating time, and the number of injector operation times which are measured through the fuel injection of the injector.

Abstract: Provided is a plasma etching method comprising supplying both hexafluoroisopropanol (HFIP) gas and argon (Ar) gas to a plasma chamber receiving an etching target therein, thereby to plasma-etch the etching target.

Abstract: A method for manufacturing a surge absorbing device is provided. The method includes providing an elongate ceramic tube having a hollow space defined therein and having open and opposite first and second end; forming a first plating layer and a second plating layer on the first end and the second end, respectively; placing a surge absorbing element within the hollow space within the ceramic tube; disposing first and second brazing rings on the first plating layer and the second plating layer, respectively; disposing first and second sealing electrodes on the first and second brazing rings respectively; and melting the first and second brazing rings in an inert gas atmosphere to attach the first and second sealing electrodes onto the first plating layer and the second plating layer, respectively.

Abstract: A device and a method for diagnosing a positive crankcase ventilation (PCV) breather line. The device includes: a crankcase pressure sensor that is installed on the PCV breather line including a front end connected to an intake line and a rear end connected to a crankcase and detects a pressure inside the crankcase; and a processor that diagnoses an abnormality of the PCV breather line based on the pressure of the crankcase.

Abstract: An apparatus and method for diagnosing a failure in a blower of a vehicle improve performance of various systems using state information of the blower. The apparatus and method include a controller that converts an operating current value supplied to the blower of the vehicle into a voltage value and diagnoses whether the blower fails based on the voltage value. The apparatus and method also include a display that displays whether the blower fails.

Abstract: A method of diagnosing an engine purge system includes: obtaining, by a controller, a first measurement value by measuring a pressure of a secondary purge line when a boosting pressure from a compressor is greater than or equal to a predetermined reference pressure; obtaining, by the controller, a second measurement value by measuring a pressure of the secondary purge line while opening and closing a purge control solenoid valve when a throttle valve is deployed; determining, by the controller, whether at least one of the secondary purge line or a recirculation line is blocked by comparing the first measurement value and the second measurement value; and providing, by the controller, an alert when it is determined that at least one of the secondary purge line or the recirculation line is blocked.

Abstract: A method of diagnosing an engine purge system includes: obtaining, by a controller, a first measurement value by measuring a pressure of a secondary purge line when a boosting pressure from a compressor is greater than or equal to a predetermined reference pressure; obtaining, by the controller, a second measurement value by measuring a pressure of the secondary purge line while opening and closing a purge control solenoid valve when a throttle valve is deployed; determining, by the controller, whether at least one of the secondary purge line or a recirculation line is blocked by comparing the first measurement value and the second measurement value; and providing, by the controller, an alert when it is determined that at least one of the secondary purge line or the recirculation line is blocked.

Abstract: A method for manufacturing a surge absorbing device is provided. The method includes providing an elongate ceramic tube having a hollow space defined therein and having open and opposite first and second end; forming a first plating layer and a second plating layer on the first end and the second end, respectively; placing a surge absorbing element within the hollow space within the ceramic tube; disposing first and second brazing rings on the first plating layer and the second plating layer, respectively; disposing first and second sealing electrodes on the first and second brazing rings respectively; and melting the first and second brazing rings in an inert gas atmosphere to attach the first and second sealing electrodes onto the first plating layer and the second plating layer, respectively.

Abstract: An evaporation gas control system includes: a canister that traps evaporation gas generated in a fuel tank, a fuel tank pressure sensor that measures pressure in the fuel tank, a purge control valve that controls a flow of the evaporation gas, which is trapped in the canister, into a surge tank through a purge line, a charger that supplies intake air from the outside into the surge tank, a check valve installed on the purge line to prevent the evaporation gas in the purge line from flowing back to the canister, and a controller that diagnoses whether the check valve is faulty or not, by monitoring a pressure variation in the fuel tank when the charger and the purge control valve operate.

Abstract: Provided is a plasma etching method comprising supplying heptafluoropropyl methyl ether (HFE) gas, argon (Ar) gas and oxygen (O2) gas to a plasma chamber receiving an etching target therein, thereby to plasma-etch the etching target.

Abstract: A method for diagnosing a fault situation of a negative-pressure generation line using a fuel tank pressure sensor that detects the pressure of a fuel tank is provided. The method detects pressure in a fuel tank measured by a fuel tank pressure sensor when a turbocharger is operated for boosting and a purge valve is operated and diagnoses a current situation as a fault situation in which an engine negative-pressure generation line remains open when a pressure change value calculated based on the pressure difference of the fuel tank exceeds a reference value. A warning of a fault situation is then output when a fault is determined.

Abstract: A method of preventing an engine stall of a vehicle having a fuel injection device for pressurizing fuel stored in a fuel tank by a high-pressure fuel pump to transmit the fuel to a common rail, and injecting the fuel temporarily stored in the common rail into an engine through an injector may include steps of determining whether or not a drift occurs in an output signal of a high-pressure fuel pressure sensor for measuring fuel pressure at a downstream side of the high-pressure fuel pump, and performing a fuel pressure control by replacing a high-pressure fuel pressure value with a predetermined pressure value based on the output signal of the high-pressure fuel pressure sensor.

Abstract: A method for monitoring leakage of an exhaust gas recirculation system for an engine of a vehicle includes: determining, by a controller, whether the engine is in an idle state in which the exhaust gas recirculation system is not operated; determining, by the controller, whether small flow leakage of the exhaust gas recirculation system occurs based on a predicted pressure of gas sucked into an intake manifold connected to the engine and a measured pressure of gas sucked into the intake manifold when the engine is in the idle state; and determining, by the controller, that leakage of the exhaust gas recirculation system occurs when the measured pressure is greater than the predicted pressure.

Abstract: A method for diagnosing a fault situation of a negative-pressure generation line using a fuel tank pressure sensor that detects the pressure of a fuel tank is provided. The method detects pressure in a fuel tank measured by a fuel tank pressure sensor when a turbocharger is operated for boosting and a purge valve is operated and diagnoses a current situation as a fault situation in which an engine negative-pressure generation line remains open when a pressure change value calculated based on the pressure difference of the fuel tank exceeds a reference value. A warning of a fault situation is then output when a fault is determined.