Toyota has announced that it's developed a new variable valve lift;system,. Dubbed Valvematic,;it combines the automaker's existing VVT-i variable valve timing setup;with a mechanism that constantly ...

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Manufacturers like to use a lot of acronyms on their cars. Variable valve lift (VVL) and variable valve timing (VVT) are two of the most popular ones. These systems sound pretty similar, but what do ...

Without variable valve timing, these intake and exhaust valves would operate in the same manner regardless of the engine’s RPM (revolutions per minute) speed or the driving environment. This isn’t ...

Once upon a time, picking a cam for a given engine combo was all about compromise: improve top-end power at the expense of low-end torque, run well at wide-open throttle but sacrifice idle stability ...

VVT has turned out to be one the most popular systems with carmakers and users alikernAn internal combustion engine uses valves for intake and exhaust In the current automobile scenario where there ...

Straight variable valve timing systems have no effect on lift or duration. Meanwhile, variable valve lift setups have a margin of control on lift, duration, and timing. Most, but not all, systems are ...

Since the beginning of hot rodding, gearheads have endeavored to increase the performance of internal combustion engines through the optimization of valve timing. It's been proven time after time that ...

AISIN CORP., BorgWarner Inc., Cummins Inc., DENSO Corp., Eaton Corp. Plc, Ford Motor Co., General Motors Co., Hitachi Ltd., Honda Motor Co. Ltd., Hyundai Motor Co ...