exhaust (the exhaust valves open and the piston forces the gases out of the cylinder as it again moves towards the head of the cylinder).ignition (the mixture is ignited and expanding gases force the piston back), and finally,.2-stroke engines, on the other hand, are more powerful. Because 2-stroke engines are built to run at a higher RPM, they wear out more quickly 4-stroke engines are more robust.

compression (the mixture is compressed as the inlet valves close and the piston is forced inwards towards the head, by the rotation of the crankshaft which is itself maintained and smoothed by the energy stored in the fly-wheel) A 4-stroke engine is also much quieter, whereas a 2-stroke engine is much louder and produces a noticeable, high-pitched buzzing sound.

In 1823, Samuel Brown patented the first internal combustion engine to be applied industrially in the United States.

induction (the inlet valves open and the fuel/air mixture is admitted as the piston moves outwards from the head of the cylinder) Fitted to a crude four-wheeled wagon, Franois Isaac de Rivaz first drove it 100 meters in 1813, thus making history as the first car-like vehicle known to have been powered by an internal-combustion engine.

In both types, each full rotation of the crankshaft produces two strokes of the piston, one moving inwards towards the head of the cylinder, followed by a second which withdraws the piston back to its initial position.Ī 4-stroke engine fires once every second rotation of the crankshaft (every fourth stroke of the piston). Whether it’s a two-seater, family car, sports car or a luxury sedan, cars run because of one thing, the Engine. Without the need for separate valvetrain and cylinder heads, and because of the simple connection between the cam plates (including the variable-compression regulator), the INNengine e-Rex is impressively power-dense.Internal combustion engines (with rare exceptions) operate on either a 2-stroke or 4-stroke cycle. Without port injection, traditional poppet valves can accumulate dangerous deposits, but without valves, this problem is eliminated. The variable compression ratio makes the engine easily adaptable to a variety of fuels. As a bonus, if placed longitudinally, power could be split 50/50 and sent to the front and rear axles, providing AWD-at the cost of two transmissions. Gearing the two cam tracks together eliminates the need for complex pushrod mechanisms to transfer energy to a common crankshaft or gearing to connect two crankshafts. Because the combustion presses equally on two pistons, most of the heat energy gets transferred to the pistons, rather than superheating a cylinder head that then requires extreme cooling. All the reciprocating masses are perfectly balanced, with combustion forces acting equally in both directions, so vibration is negligible (the website shows a coin balancing on end).

Combustion 4 stroke