VarioCam is an automobile variable valve timing technology developed by Porsche. VarioCam varies the timing of the intake valves by adjusting the tension on the timing chain connecting the intake and exhaust camshafts. VarioCam was first used on the 1992 3.0 L engine in the Porsche 968. A system similar to the VarioCam Plus system was developed by Porsche for Subaru for the redesigned EZ30R H6 engine which debuted in 2003 in the Legacy and Outback.
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| - VarioCam (it)
- バリオカム (ja)
- VarioCam (en)
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| - バリオカム（VarioCam）は自動車のエンジンにおいて使用される可変バルブ機構のポルシェにおける名称である。 基本特許はロータスが所持しており、それをシェフラーが買ってポルシェと共同開発した。市販車においては1991年、ポルシェ・968において最初に使用された。 (ja)
- Il VarioCam è una tecnologia sviluppata da Porsche, per la regolazione della fasatura delle valvole.Il VarioCam varia la fasatura delle valvole d'aspirazione regolando la tensione della catena che collega gli alberi alle camme d'aspirazione e scarico.VarioCam è stato utilizzato per la prima volta nel 1992 su un motore da 3,0 L e le Porsche 968. (it)
- VarioCam is an automobile variable valve timing technology developed by Porsche. VarioCam varies the timing of the intake valves by adjusting the tension on the timing chain connecting the intake and exhaust camshafts. VarioCam was first used on the 1992 3.0 L engine in the Porsche 968. A system similar to the VarioCam Plus system was developed by Porsche for Subaru for the redesigned EZ30R H6 engine which debuted in 2003 in the Legacy and Outback. (en)
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| - VarioCam is an automobile variable valve timing technology developed by Porsche. VarioCam varies the timing of the intake valves by adjusting the tension on the timing chain connecting the intake and exhaust camshafts. VarioCam was first used on the 1992 3.0 L engine in the Porsche 968. Porsche's more recent VarioCam Plus combines variable valve timing with two-stage lift on the intake side. The two-stage valve-lift function is performed by electro-hydraulically operated switchable tappets. Each of these 12 tappets consists of concentric lifters which can be locked together by means of a pin. The inner lifter is actuated by a small cam lobe, while the outer ring element is moved by a pair of larger-profile lobes. The timing of each valve is seamlessly adjusted by means of an electro-hydraulically operated rotary vane adjuster at the head of each intake camshaft. Valve timing and the valve profile are continuously altered according to conditions and engine load. For improved responsiveness on cold starts, VarioCam Plus raises the amount of lift and retards valve timing. At medium revs with minimal loads, the valve lift is lowered and timing advanced to help minimize fuel consumption and emissions. For maximum power and torque, the lift is raised and the timing is advanced. This system debuted on the 1999 Porsche 996 Turbo. A system similar to the VarioCam Plus system was developed by Porsche for Subaru for the redesigned EZ30R H6 engine which debuted in 2003 in the Legacy and Outback. (en)
- バリオカム（VarioCam）は自動車のエンジンにおいて使用される可変バルブ機構のポルシェにおける名称である。 基本特許はロータスが所持しており、それをシェフラーが買ってポルシェと共同開発した。市販車においては1991年、ポルシェ・968において最初に使用された。 (ja)
- Il VarioCam è una tecnologia sviluppata da Porsche, per la regolazione della fasatura delle valvole.Il VarioCam varia la fasatura delle valvole d'aspirazione regolando la tensione della catena che collega gli alberi alle camme d'aspirazione e scarico.VarioCam è stato utilizzato per la prima volta nel 1992 su un motore da 3,0 L e le Porsche 968. (it)
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