marekatlanta71 21.05.04, 18:04 Czym sie rozni "3-rocker VTEC system" od "2-rocker VTEC system"? Odpowiedz Link Obserwuj wątek Podgląd Opublikuj
marekatlanta71 Znalazlem 21.05.04, 18:05 3-Rocker VTEC System Honda used expertise gained from its successful racing programs to develop the innovative VTEC system more than a decade ago. Since then, various forms of VTEC have become familiar features on many of the company's engines. VTEC makes it possible to vary the relative timing and lift of the intake valves to optimize overall performance, netting good low-end torque as well as improved high-end horsepower. Basic operation of the 3-rocker VTEC setup used on the 2003 Accord's V6 is similar to that of the 2-rocker version used on the DOHC 4-Cylinder, where rocker arms fitted with low-friction roller followers actuate the intake valves. The heart of the VTEC system is a unique camshaft and rocker arm system. For each cylinder's set of two intake valves, there are three rocker arms and three corresponding lobes on the camshaft. The two outboard lobes each have a profile maximizing cylinder swirl to suit low- to mid-rpm operation. The third or center cam lobe has a dramatically different profile designed for longer duration and higher lift. This lobe profile is designed to optimize breathing and horsepower production at high engine speeds. At low engine rpm, the outboard lobes operate the valves. During high-speed operation the VTEC computer sends a signal to a spool valve, which in turn delivers engine oil pressure to small pistons in the rocker arms. Oil pressure causes the pistons to move, locking all three rocker arms together. Once locked, the rocker arms are forced to follow the center cam lobe, increasing top-end performance. The crossover from low lift to high lift occurs in 0.1 seconds and is virtually undetectable to the driver. Odpowiedz Link
marekatlanta71 Jeszcze pare ciekawostek 21.05.04, 18:15 Accord V6 with Manual Transmission Sport Sound The V6 engine in the Accord Coupe fitted with the 6-speed manual transmission features exclusive revisions to the air intake system and a modified single-chamber resonator. This provides the "Ultimate Sport Accord" with a more aggressive intake sound during acceleration, yet retains the sophisticated character of other Accord models under normal cruising conditions. Dlatego taki ladny dzwiek ma jak sie przygazuje... -- 480 KM w 2 kawalkach. Szkoda ze nie w jednym... Odpowiedz Link
niknejm Re: Jeszcze pare ciekawostek 24.05.04, 11:29 Hi hi :-) Dobra, już odpowiadam. Tu: www.hondapl.org/vteccompare/vteccompare.html Jest wszystko o różnych implementacjach VTECa. I podejrzewam, że u Marka jest jeszcze to: www.hondapl.org/technika/engine/intake.html Pzdr Niknejm Odpowiedz Link
