Abstract:
본 발명의 실시예들에 의한 가변 스티어링 랙 시스템에 의하면 작동시 소음이 감소될 수 있고, 그 내구성이 향상 될 수 있다. 스티어링 랙 바(steering rack bar), 기어 박스, 스토퍼, 중간 기어, 구동부, 러버층(rubber layer), 합성수지
Abstract:
Provided are a thermoplastic elastic polymer which is excellent in durability and elasticity and is reduced in the generation of crack during molding process, and an automobile interior material comprising the thermoplastic elastic polymer. The thermoplastic elastic polymer comprises 100 parts by weight of an ethylene propylene diene monomer; 60-150 parts by weight of polypropylene; 0.4-16 parts by weight of a peroxide crosslinking initiator; and 1.2-8 parts by weight of ethylene glycidyl methacrylate. The polypropylene has a number average molecular weight of 40,000-80,000, a melt index of 1.8-10 g/10 min and a density of 0.8-0.9 g/cm^3; and the ethylene glycidyl methacrylate comprises 60-80 wt% of ethylene and 3-6 wt% of ethylene norbornene. Preferably the ethylene glycidyl methacrylate further comprises 6-10 wt% of glycidyl methacrylate.
Abstract:
PURPOSE: A car incline prevention method is provided to prevent the inclination of a car by responding to short- or long-term incline elements such as a side wind, uneven tire wear, an inclined surface, an obstacle, and etc. CONSTITUTION: A car incline prevention method is comprised of the following steps: a step(S10) which receives an on operation of an operation button; a step(S20) which determines a driving condition; and a step(S30) which fixes the rotation of a steering wheel depending on the driving condition. The driving condition is determined by a steering angle sensor and a car speed sensor. The steering angle sensor detects a rotation angle of the steering wheel. The car speed sensor detects a steering torque sensor and the velocity of a car to detect the rotation torque of the steering wheel. [Reference numerals] (AA,DD) Steering angle sensor; (BB,EE) Steering torque sensor; (CC,FF) Vehicle speed sensor; (S10) Hands-free steering switch ON; (S20) Vehicle speed >= 40kph & Steering wheel angle >= maintain 45° & wheel angle >= maintain 3 seconds & steering torque >= 3 seconds; (S21) MDPS basic control; (S30) MDPS hands-free steering control; (S40) Speed vehicle <= 40kph or steering wheel angle change >= ±5° or steering wheel angular speed >= 20°/s or steering torque >= 0.5Nm
Abstract:
PURPOSE: A method for quantitative-analyzing the rubber content and the grafting ratio of an acrylonitrile-butadiene-styrene(ABS) resin is provided to improve the reliability of measurement with respect to the content of butadiene in the ABS resin. CONSTITUTION: A method for quantitative-analyzing the butadiene content of the ABS resin includes the following: The butadiene double bonds of an ABS resin is substituted into single bonds using iodine chloride in chemical formula 1. Remaining iodine chloride is reacted with potassium iodine to generate iodine molecules in chemical formula 2. The iodine molecules are titrated using sodium thiosulfate(Na_2S_2SO_3) in chemical formula 3. Styrene acrylonitrile(SAN) copolymer is dissolved from the ABS resin using an organic solvent. Insoluble SAN-grafted-butadiene is collected. The SAN grafting ratio of the SAN-grafted-butadiene is analyzed.
Abstract:
A method for analyzing the contaminant of pvc+abs blend using the thermal decomposition behavior is provided to prevent the property of material from degrading by calculating the each compositional content using the thermal decomposition characteristic of material. A method for analyzing the contaminant of pvc+abs blend comprises followings. A furnace of a TGA equipment is heated to 30~400°C at 20°C/min under the nitrogen atmosphere. The furnace can stays at 400°C for 20 minutes. The furnace is heated to 580~620°C at 5~20°C/min and mood of furnace is changed with the oxygen. The temperature of the furnace is increase to 850~870°C under the oxygen atmosphere at 5~20°C/min. The ABS and PVC content ratio and the actual amount of HCI and PVC are calculated by computing the weight percent of a test piece at the temperature which PVC of the test piece is disassembled to HCI.
Abstract:
A method for analyzing the content of polypropylene is provided to calculate the content of polypropylene in a polypropylene/polyethylene blend used for car interior materials by measuring the melting point of polypropylene with high efficiency and accuracy. A method for analyzing the content of polypropylene in a polypropylene/polyethylene blend comprises the steps of: providing a sample for differential scanning calorimetry by using a polypropylene/polyethylene blend materials; heating the sample from 50 deg.C to 200 deg.C at a heating rate of 10 deg.C/min in a differential scanning calorimeter; and calculating the content of polypropylene.