1. The suggested project of four-stroke internal-combustion engines line (3 variants) with variable compression index essentially differs in design from production engines by decrease in technological costs, labour inputs and financial expenditure on units and components manufacturing, less number of components demanding casting and close tracking.

The result is:

- internal loss by friction decrease up to 25-30%;
- engine effectiveness increase for 12-15%;
- higher high frequency of useful cylinders operation;
- high loads for slow revolutions by large torque

2. The basic mechanism design change gave cause for change of work cyclicity in cylinders, so total engines volume change. I.e. if the serial two-liter engine has 4 cylinders, our model has only 2 cylinders at identical parameters such as a piston stroke and diameter of the cylinder (fig. 1.).

Fig. 1. Suggested engine line variants: a - two-cylinder; b - three-cylinder; B - four-cylinder. 

3. The phase diagram (fig. 2.) shows that it is possible to vary "phase - work cycle" depending on conditions of engine application. The design proposes engine compression degree too.

a                                                                                b

а) Phases diagram for 720^o of two-liter line engine; b) Phases diagram for 360^o of two-liter engine model offered by us

Fig. 2. Comparative phases diagram:

a) α - advancing ignition angle; I - TDP (top dead point); II - BDP (bottom dead point); III - suction; IV - compression; V - work cycle; VI - output; b) α - advancing ignition angle; I - TDP (top dead point); II - suction; III - compression; IV - work cycle; V - output. 

The engine proposes a wide application spectrum.

4. Innovation condition: working out with the basic theoretical positions.

5. Cooperation forms:

a) Combined patenting or firm's (company's) expense;
b) Work departure to the firm for combined innovation implementation;
c) Currency financing reception for production and combined implementation of suggested project;
d) Other.

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