Abstract: A digital displacement hydraulic motor uses actively controlled on/off valves instead of a valve plate for porting fluid. Displacement can then be varied by varying the timing of the on/off ...

Mitral valve surgery has changed considerably in the past decades and is now indicated mostly for pure or predominant mitral regurgitation. This is the result of the regression of rheumatic disease, ...

In 2015, Ford introduced the 2.7-liter EcoBoost for the F-150, proving that good things come in small packages by combining big power and small displacement. While proving its worth in the F-150 as a ...

The Central Board of Secondary Education (CBSE) has outlined specific guidelines for practical and internal assessments in its "Highlights of the Proposed Scheme." Assessment Frequency: Practical and ...

EGR stands for exhaust gas recirculation, and the EGR valve is part of a system that does as the name implies: recirculate exhaust gas back into the engine’s intake manifold for a return trip to the ...

There is so much going on with internal combustion engines (ICEs) these days, it can give you a headache just reading about them. That's why we do the research for you and then cram it into bite-size ...

A hot air or Stirling engine runs without carburetors, injectors, cams, valves, timing chains, spark plugs, or anything. It’s incredibly simple and can even be emissions negative, running on waste ...

The first production car engine with variable valve timing (VVT) came from Alfa Romeo in 1980. It was installed in the fuel-injected Alfa Romeo Spider. Before this, a few experimental systems existed, ...