Vacuuming is a necessary chore to keep your home clean and free of dust and debris. However, traditional portable vacuum cleaners may not always provide the suction power, quiet operation and allergy ...

Nissan has recently patented a new variable valve timing (VVT) mechanism for use in series hybrids. The unit looks like it could eventually be attached to the brand’s “e-Power” vehicles with an ...

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 ...