Evidently the Daimler Company reasoned that while it might be possible for a poppet valve engine to meet the first and second stages of the test it was obviously impossible for such a motor to ...

Pressure on the pilot port acts over a larger area on the poppet than the area facing the cylinder port, so the valve will open at a low pressure.

For starters, as was the case with other poppet valve configurations, the valve gear was often terrifically noisy. ... It packed a four-cylinder sleeve-valve engine, displacing 5.7 litres, ...

Electrohydraulic poppet valves overcome the limitations of spool valves. ... When cylinder forces are small, such as extending a light load, highside regeneration reduces cycle times by up to 50%.

Mechanically actuated valves may soon be a thing of the past. We've made over a century's worth of improvement on the same basic combination of a camshaft, followers (or lifters), a poppet valve ...

The 4.3-liter uses Central Sequential Fuel Injection (CSFI), an all-in-one system that includes a fuel regulator, injectors, and pipes leading to poppet valves at each cylinder.