Abstract: The present invention provides an apparatus and method for controlling motor position and creep of an electric vehicle, in which when a running vehicle is stopped, motor position control for maintaining the vehicle in the stopped position even when a brake pedal is released is performed, and then creep torque control is performed such that the vehicle is prevented from rolling backwards and suddenly starting when the vehicle is restarted after a stop on a slope.

Abstract: The present invention provides a technique for controlling creep torque to prevent a vehicle from rolling backward on an upward slope. In particular, a gradient of a road is calculated in real time from a detection value of a sensor and vehicle acceleration. A maximum creep torque for preventing roll-back caused by gravity according to the gradient is calculated using the gradient and vehicle information. A first creep torque reference is calculated based on the maximum creep torque and the vehicle speed. A second creep torque reference is calculated based on the maximum creep torque and the vehicle acceleration. A torque command value according to an operation state of a brake is calculated based on the first creep torque reference value and the second creep torque reference value and the gradient. In response, a torque output of a driving motor is controlled according to the calculated torque command value.

Abstract: The present invention provides a hybrid fuel cell system that is configured to determine if an idle stop condition has been satisfied during a normal operation mode of the hybrid fuel cell system, cut off air supply to a fuel cell to stop power generation of the fuel cell and reduce a voltage which the fuel cell outputs in response to determining that the idle stop condition has been satisfied. The voltage of a bidirectional converter, connected between a battery and a bus terminal is reduced and the output of the fuel cell is controlled, based on a first predetermined value and maintained at that first predetermined value. Subsequently, the battery is charged via the output current of the fuel cell generated by maintaining the reduced voltage of the bidirectional converter.

Abstract: The present invention provides an apparatus and method for controlling motor position and creep of an electric vehicle, in which when a running vehicle is stopped, motor position control for maintaining the vehicle in the stopped position even when a brake pedal is released is performed, and then creep torque control is performed such that the vehicle is prevented from rolling backwards and suddenly starting when the vehicle is restarted after a stop on a slope.

Abstract: A power-down control method of a fuel cell hybrid vehicle includes determining an operation mode when a key-off command is input. If the mode is a fuel cell mode, the method includes: converting a low voltage DC-DC converter connected to an auxiliary battery to a boost mode; maintaining a driving state of a high voltage part, powered by voltage from the auxiliary battery and boosted by the low voltage DC-DC converter; subsequently stopping operation of a fuel cell stack and turning off the high voltage part; and subsequently turning off the low voltage DC-DC converter. If the mode is a hybrid mode, the method includes: maintaining a driving state of the high voltage part, powered by voltage from a super capacitor; subsequently stopping operation of the fuel cell stack and turning off the high voltage part; subsequently turning off the DC-DC converters; and subsequently cutting power of the super capacitor.

Abstract: Provided are a plasticizer composition including a hydroxypivalyl hydroxypivalate ester and a neopentylglycol ester, and a method of preparing the plasticizer composition. The plasticizer composition provides a polyvinyl chloride resin having excellent properties of heat loss, migration resistance and plasticization efficiency, and tensile strength, elongation, etc.

Abstract: A regenerative braking system includes a capacitor which is electrically connected to a stack and is charged by the stack, a traction motor, a motor control unit which control electric power input to the traction motor and electric power output from the traction motor, a chopper which is connected to the capacitor so as to be ON and OFF switched thereby limiting charging voltage of the capacitor, a braking resistor which consumes regenerative energy so as to serve as an auxiliary brake, and a hybrid control unit which turns on the chopper in case that a charging voltage limit of capacitor is exceeded so as to control overcharge of the capacitor and turns off the chopper in case that charging voltage of the capacitor descends. The capacitor is preferably a super capacitor.

Abstract: A regenerative braking system includes a capacitor which is electrically connected to a stack and is charged by the stack, a traction motor, a motor control unit which control electric power input to the traction motor and electric power output from the traction motor, a chopper which is connected to the capacitor so as to be ON and OFF switched thereby limiting charging voltage of the capacitor, a braking resistor which consumes regenerative energy so as to serve as an auxiliary brake, and a hybrid control unit which turns on the chopper in case that a charging voltage limit of capacitor is exceeded so as to control overcharge of the capacitor and turns off the chopper in case that charging voltage of the capacitor descends. The capacitor is preferably a super capacitor.

Abstract: A power-down control method of a fuel cell hybrid vehicle includes determining an operation mode when a key-off command is input. If the mode is a fuel cell mode, the method includes: converting a low voltage DC-DC converter connected to an auxiliary battery to a boost mode; maintaining a driving state of a high voltage part, powered by voltage from the auxiliary battery and boosted by the low voltage DC-DC converter; subsequently stopping operation of a fuel cell stack and turning off the high voltage part; and subsequently turning off the low voltage DC-DC converter. If the mode is a hybrid mode, the method includes: maintaining a driving state of the high voltage part, powered by voltage from a super capacitor; subsequently stopping operation of the fuel cell stack and turning off the high voltage part; subsequently turning off the DC-DC converters; and subsequently cutting power of the super capacitor.

Abstract: Provided is a novel triethyleneglycol based compound, a plasticizer composition for polyvinyl chloride resin including the same, and a method of preparing the plasticizer composition. In particular, the plasticizer composition for polyvinyl chloride resin includes the novel compound, 2-(2-(2-(2-ethylhexanoyloxy)ethoxy)ethoxy)ethyl 2-ethylhexanoate, and 2-(2-(2-phenylcarbonyloxyethoxy)ethoxy)ethyl benzoate in a proper mixture ratio. A polyvinyl chloride prepared using the plasticizer composition has low heating loss, excellent adhesion, high plasticization efficiency, high elongation, high tensile strength, and high transparency.

Abstract: The present invention relates to a diethylene glycol ester based plasticizer composition comprising at least two diethylene glycol ester compounds. The diethylene glycol ester based plasticizer composition of the present invention offers superior tensile strength, elongation, transfer resistance, hardness, transparency, adhesivity, and compatibility with resin, when used for a plasticizer of a polyvinyl chloride resin, without releasing environmental hormones. Thus, it can be used for a polyvinyl chloride resin of a warp film.

Abstract: The present invention relates to a trimethylolpropane ester-based plasticizer composition for polyvinyl chloride resin, more particularly a plasticizer composition comprising trimethylolpropane ester capable of using as plasticizer of polyvinyl chloride resin. The present invention can prepare polyvinyl chloride resin having superior tensile strength, elongation, migration, and sheet heating loss etc. by using the plasticizer composition.

Abstract: The present invention relates to a plasticizer composition, and more particularly a plasticizer composition comprising neopentylglycol ester capable of being using as plasticizer of polyvinyl chloride resin, and method of prepation thereof. The plasticizer composition of the present invention can prepare polyvinyl chloride resin having superior tensile strength, elongation, static heat resistance, and viscosity stability etc.

Abstract: The present invention relates to a plasticizer composition, and more particularly a plasticizer composition comprising neopentylglycol ester capable of being using as plasticizer of polyvinyl chloride resin, and method of prepation thereof. The plasticizer composition of the present invention can prepare polyvinyl chloride resin having superior tensile strength, elongation, static heat resistance, and viscosity stability etc.

Abstract: The present invention relates to a trimethylolpropane ester-based plasticizer composition for polyvinyl chloride resin, more particularly a plasticizer composition comprising trimethylolpropane ester capable of using as plasticizer of polyvinyl chloride resin. The present invention can prepare polyvinyl chloride resin having superior tensile strength, elongation, migration, and sheet heating loss etc. by using the plasticizer composition.