Monday, 18 September 2017
What is v-tec?
VTEC (Variable Valve Timing and Lift Electronic Control, pronounced "vee-tech") is a system developed by Honda to improve the volumetric efficiency of a four-stroke internal combustion engine, resulting in higher performance at high RPM, and lower fuel consumption at low RPM. The VTEC system uses two camshaft profiles and hydraulically selects between profiles. It was invented by Honda engineer Ikuo Kajitani.The VTEC system provides the engine with valve timing optimized for both low and high RPM operations. In basic form, the single barring shaft-lock of a conventional engine is replaced with two profiles: one optimized for low-RPM stability and fuel efficiency, and the other designed to maximize high-RPM power output. The switching operation between the two cam lobes is controlled by the ECU which takes account of engine oil pressure, engine temperature, vehicle speed, engine speed and throttle position. Using these inputs, the ECU is programmed to switch from the low lift to the high lift cam lobes when the conditions mean that engine output will be improved. At the switch point a solenoid is actuated which allows oil pressure from a spool valve to operate a locking pin which binds the high RPM cam follower to the low RPM ones. From this point on, the valves open and close according to the high-lift profile, which opens the valve further and for a longer time. The switch-over point is variable, between a minimum and maximum point, and is determined by engine load. The switch-down back from high to low RPM cams is set to occur at a lower engine speed than the switch-up (representing a hysteresis cycle) to avoid a situation in which the engine is asked to operate continuously at or around the switch-over point.
Why i want to became a hacker?
which can be to report and help fixing the security bugs, or exploitation reasons they call white hat! That's pretty cool! I wanna be part of them, hope it can become real.
Why i love Nissan GTR Skyline?
The Nissan Skyline GT-R is a Japanese sport car.
The first cars named "Skyline GT-R" were produced between 1969 and 1972 under the model code KPGC10, and enjoyed legendary success in local Japanese touring car racing.The GT-R name was revived in 1989 as the BNRR32 ("R32") Skyline GT-R. This model GT-R proceeded to win the Japanese JTCC Group A series championship four years in a row. The R32 GT-R also had success in the Australian Touring Car Championship helping the R31 Skyline GTS-R to victory in 1990 and winning alone in 1991 and 1992, until a regulation change excluded the GT-R in 1993.The formidable technology and performance of the R32 GT-R prompted the Australian motoring publication Wheels to nickname the GT-R "Godzilla" in its July 1989 edition.The Skyline GT-R became the flagship of Nissan performance, showcasing many advanced technologies including the ATTESA E-TS AWD system and the Super-HICAS four-wheel steering. Today, the car is popular for import drag racing, circuit track, time attack and events hosted by tuning magazines. Production of the Skyline GT-R ended in August 2002. The car was replaced by the R35 Nissan GT-R, an all-new vehicle based on the V36 Skyline. Although visibly different, the two vehicles share similar design features and are manufactured in the same factory.
The car was named at the time by BBC's Top Gear as the only true Japanese contribution in the line of supercars,and by Jeremy Clarkson as one of the best cars in the world.
The first cars named "Skyline GT-R" were produced between 1969 and 1972 under the model code KPGC10, and enjoyed legendary success in local Japanese touring car racing.The GT-R name was revived in 1989 as the BNRR32 ("R32") Skyline GT-R. This model GT-R proceeded to win the Japanese JTCC Group A series championship four years in a row. The R32 GT-R also had success in the Australian Touring Car Championship helping the R31 Skyline GTS-R to victory in 1990 and winning alone in 1991 and 1992, until a regulation change excluded the GT-R in 1993.The formidable technology and performance of the R32 GT-R prompted the Australian motoring publication Wheels to nickname the GT-R "Godzilla" in its July 1989 edition.The Skyline GT-R became the flagship of Nissan performance, showcasing many advanced technologies including the ATTESA E-TS AWD system and the Super-HICAS four-wheel steering. Today, the car is popular for import drag racing, circuit track, time attack and events hosted by tuning magazines. Production of the Skyline GT-R ended in August 2002. The car was replaced by the R35 Nissan GT-R, an all-new vehicle based on the V36 Skyline. Although visibly different, the two vehicles share similar design features and are manufactured in the same factory.
The car was named at the time by BBC's Top Gear as the only true Japanese contribution in the line of supercars,and by Jeremy Clarkson as one of the best cars in the world.
Monday, 11 September 2017
Why i choose New Era University College?
Why i choose New Era University College?
Because it is nearby my house just like a stone throw away. My class start at 1.00 p.m. and i can 1'o clock come to college.I come to college by walking no need petrol and no traffic jam.The college not bad is a good choose, think about it ,u will no regret.The most important thing is we can communicate by using chinese language.
Why I choose IT / Computer course.
Hello everybody, my name is Hoo Zhen Nan.
Why I choose IT / Computer course.
Why I choose IT / Computer course.
Due to it attract me, it like u can build a new things, is cool!Can let the world surprised, new things they haven't look before like AI, artificial intelligence! so i like it so much and i'm proud of it!
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What is v-tec?
VTEC (Variable Valve Timing and Lift Electronic Control, pronounced "vee-tech") is a system developed by Honda to improve the v...