Patent application number | Description | Published |
20100084913 | ELECTRONIC CONTROL BRAKE SYSTEM - Disclosed herein is an electronic control brake system that has a compact structure while rapidly forming an oil pressure during active control and reducing pressure pulsation, simultaneously. The electronic control brake system includes a master cylinder assembly to provide braking force, a plurality of brake cylinders to achieve braking, first and second hydraulic circuits connecting the master cylinder and the plurality of brake cylinders to form a closed circuit, a pump unit installed in the first and second hydraulic circuits to achieve active control, and a motor to drive the pump unit. The pump unit includes first, second, third, and fourth pumps, the first pump and the second are respectively arranged in planes, being orthogonal with the rotary axis X of the motor, located in different layers in the direction of a rotary axis of the motor at an angular position of 0 degrees from the rotary axis of the motor, the third pump arranged in the same plane as the first pump at an angular position of 270 degrees from the rotary axis X of the motor, and the fourth pump is arranged in the same plane as the second pump at an angular position of 90 degrees from the rotary axis of the motor. The first pump and the third pump are connected to the first hydraulic circuit, and the second pump and the fourth pump are connected to the second hydraulic circuit. | 04-08-2010 |
20110074205 | PUMP UNIT FOR ELECTRONICALLY CONTROLLED BRAKE SYSTEM - Disclosed is a pump unit for an electronically controlled brake system. The pump unit is operated by a motor having a shaft to be rotated about a rotating axis, and the shaft includes a concentric shaft portion and an eccentric portion integrally formed with each other. An eccentric bearing is coupled to the concentric shaft portion and a concentric bearing is coupled to the eccentric portion, to reduce hydraulic pulsation during operation of pumps and achieve rapid generation of hydraulic pressure. | 03-31-2011 |
20110074206 | PUMP UNIT FOR ELECTRONICALLY CONTROLLED BRAKE SYSTEM - Disclosed is a pump unit for an electronically controlled brake system. In the electronically controlled brake system having a motor unit to drive the pump unit, the motor unit includes a motor body having a rotating shaft, and a shaft separably coupled to the rotating shaft. The motor unit and pump unit may be assembled to each other in a simplified manner. | 03-31-2011 |
20120192555 | ELECTRO-HYDRAULIC BRAKE AND CONTROL METHOD THEREOF - Disclosed herein are an electro-hydraulic brake and a control method thereof which provide hydraulic braking force to transfer a stable pedal feel and provide regenerative braking to improve fuel efficiency. The electro-hydraulic brake includes a master cylinder, a housing including a booster chamber and a base chamber, an oil reservoir, a hydraulic control unit connected to the oil reservoir, a simulation unit, and a pedal displacement sensor. The hydraulic control unit includes an accumulator, a pump to absorb oil from the oil reservoir and to discharge the oil to the accumulator, a motor to drive the pump, a normal cut valve, a simulation control valve, two control valves to control the pressure in the booster chamber, pressure sensors to sense the pressures in the base chamber, the accumulator and the booster chamber, and a controller to control the motor and the valves based on pressure information and pedal displacement information. | 08-02-2012 |
20130086898 | BRAKE DEVICE OF ELECTRO-HYDRAULIC BRAKE SYSTEM FOR VEHICLES - Disclosed herein is a brake device of an electro-hydraulic brake system for vehicles which provides hydraulic braking force to transmit stable pedal feel and provides regenerative braking for fuel efficiency improvement. The brake device includes an actuator unit including a master cylinder, a housing including a boosting chamber and a simulation chamber, an input rod, a reservoir connected to the upper portion of the master cylinder and storing oil, a simulator connected to the simulation chamber and a pedal displacement sensor sensing displacement of the pedal, and a hydraulic control unit. The hydraulic control unit includes an accumulator, a pump sucking oil from the reservoir and discharging the oil to the accumulator, a motor, a first control valve, a second control valve, a third control valve, pressure sensors sensing the pressures of the accumulator, the boosting chamber and the simulation chamber, and an electronic control unit (ECU). | 04-11-2013 |
Patent application number | Description | Published |
20090010348 | Decoding Apparatus and Decoding Method - Provided are a decoding apparatus, a decoding method and a receiving apparatus for decoding in a system supporting an OFDM/OFDMA scheme. The decoding method includes the steps of: receiving phase-modulated signal; performing subcarrier demodulation on the received signal and generating correlation metrics; generating decoding metrics using the correlation metrics; and determining a payload using the largest metric of the decoding metrics and at least one of an average metric and the second largest metric of the decoding metrics. The decoding apparatus includes: a receiving buffer for buffering received phase-modulated signal; a likelihood metric generator for generating decoding metrics corresponding to likelihoods of the received signal buffered in the receiving buffer being determined as respective potential payload values; a mean calculator for calculating an average metric; and a payload determiner for determining a payload using the largest metric of the decoding metrics and at least one of an average metric and the second largest metric of the decoding metrics. | 01-08-2009 |
20090016420 | APPARATUS AND METHOD FOR MEASURING CARRIER TO INTERFERENCE AND NOISE RATIO - Provided are an apparatus and method for measuring a carrier-to-interference and noise ratio (CINR) using a pilot symbol in a digital communication system, and more particularly, to an apparatus and method for measuring a CINR by estimating a data signal, noise, and an interference signal from a pilot symbol in a digital communication system using orthogonal frequency division multiplexing (OFDM)/orthogonal frequency division multiplexing access (OFDMA). The apparatus includes: a pilot symbol acquisition unit for acquiring the pilot symbol from a baseband frequency signal; a signal estimation unit for estimating a pilot signal and a data signal from the pilot symbol; a power calculation unit for calculating a power value of the estimated data signal and calculating a power value of a noise signal from a difference between the pilot symbol and an estimated pilot signal; and a CINR calculation unit for calculating a CINR on the basis of the power values of the data and noise signals. Thus, a pilot symbol is used for more easily and precisely measuring a CINR of a received signal, and scheduling of a base station and transmission power control of a terminal are performed on the basis of the measured CINR. | 01-15-2009 |
20090046799 | DECODER AND DECODING METHOD SUPPORTING OFDM/OFDMA - Provided are an apparatus and method for efficiently decoding signals input through a plurality of antennas in a system supporting an Orthogonal Frequency Division Multiplexing (OFDM)/Orthogonal Frequency Division Multiple Access (OFDMA) scheme. A method for decoding signals received via at least two paths through a plurality of antennas in a system supporting an 0FDM/0FDMA scheme, the method comprising the steps of: measuring power of a signal received via each path; generating correlation metrics by calculating inner products of basis vector sets or multiplying the basis vector sets in units of tiles or bins of the signal; generating decoding metrics based on the measured power of each path and the correlation metrics; and determining a payload on the basis of the decoding metrics. An apparatus for decoding signals received via at least two paths through a plurality of antennas in a system supporting an OFDM/OFDMA scheme, the apparatus comprising: a signal power measuring means for measuring power of a signal received via each path; a demodulation/decoding means for generating correlation metrics corresponding to likelihood of potential payload values of a signal received via each path; and a maximum ratio combining (MRC)/determination means for determining a payload based on the measured power of each path and the correlation metrics. | 02-19-2009 |
20090052563 | DECODING APPARATUS AND DECODING METHOD - Provided are a decoding apparatus and method for a system supporting an Orthogonal Frequency Division Multiple Access (OFDMA) scheme, the apparatus and method compensating received signals according to a wireless channel estimation result and thereby simply performing decoding by a coherent method. The decoding method includes the steps of: receiving a Quadrature phase shift keying (QPSK) modulated signal; compensating the received signals by applying a result of channel estimation based on pilot signals to the received signals; performing subcarrier demodulation to generate correlation metrics on the basis of the compensated received signals; and performing decoding using a decoding metric derived from the correlation metrics. The decoding apparatus and method compensate a received wireless signal according to a channel estimation result of a wireless channel through which a signal is transmitted, thereby performing decoding by a coherent method having a simple structure. | 02-26-2009 |
20090052596 | DECODER AND DECODING METHOD - Provided are a decoding apparatus and method for a system supporting an Orthogonal Frequency Division Multiplexing (OFDM)/Orthogonal Frequency Division Multiple Access (OFDMA) scheme, the apparatus and method capable of simply performing decoding by a non-coherent method. The decoding method includes the steps or receiving quadrature phase shift keying (QPSK) modulated signal; performing subcarrier demodulation whereby correlation metrics are generated on the basis of the received signal; and performing decoding using a decoding metric derived from the correlation metrics. The correlation metrics are obtained by multiplying tile, bin or zone of received signal by sets of basis vectors. The decoding apparatus includes: a receiving buffer for buffering received QPSK modulated signal; a correlation metric generator for generating correlation metrics on the basis of the received signal buffered in the receiving buffer; and a decoding processor for performing decoding using a decoding metric derived from the correlation metrics. | 02-26-2009 |