marzo 4, 2019


Simplicity: 1Stroke Engine

Neither a 4-stroke nor a 2-stroke: INNengine 1Stroke

A 2-stroke engine produces twice as many power strokes per revolution as its 4-stroke equivalent. The 1Stroke engine takes this one step farther offering twice as many power strokes per revolution as its 2-stroke equivalent and therefore 4 times more than its 4-stroke counterpart. This advantage leads to smaller displacement engines for similar performance, and lower in-cylinder pressure achieving lower emissions compared to anything else seen before.

The 1Stroke engine is therefore simpler, lighter, smaller and more power compact than a 2-stroke engine thanks to having twice as many explosions per cylinder per revolution whilst requiring fewer components to achieve this.

Compacity and simplicity help the 1Stroke engine to be more efficient than a 4-stroke, but this efficiency is then taken to a whole new level by INNengine’s patented technology VCR&VPT.

Without a crankshaft or connecting rods

In the 1Stroke concept the power flows naturally from the vertical movement of the pistons into rotation at the main shaft without the need of the crankshaft/connecting rod system achieving a perfect mass balance and having the low vibrations of a rotary engine with the robustness of a reciprocating one.

The cinematic curve is not locked as in traditional engines but can be tailored to the individual needs and requirements of each application.

Furthermore, INNengine’s trademark technology, VCR (Variable Compression Ratio) allows the 1Stroke engine ECU to dynamically change its compression ratio to perfectly adjust its performance to the changing demands of real-life operation.

Without cylinder head or camshaft

With two pistons per cylinder, working in opposite reciprocating action, 1Stroke engines do not need cylinder heads which are a major contributor to heat losses in conventional engines. Ports in the cylinder walls replace the complex poppet valves and friction-creating valve trains of conventional engines. The intake ports at one end of the cylinder and exhaust ports at the other are opened by the piston motion and enable efficient uniflow air scavenging without the traditional overlapping found in 2-stroke engines.

Furthermore, the advantages of the simplicity of using cylinder ports vs valves used to be shadowed by the efficiency losses due to lack of versatility. No more. The 1Stroke engine has VPT (Variable Port Timing) technology which allows to control the distribution by dynamically adjusting cylinder port timing.

With Variable Compression Ratio & Variable Port Timing

VCR&VPT technology is at the core of the 1Stroke engine concept. Not only we can dynamically regulate the distribution without the need of valves/camshaft but also, we can do what 4-stroke engines could not: dynamically adjust the Compression Ratio of the engine on demand without the need of complicated solutions.