The engine has axial configuration, two cylinders, liquid cooling, countermoving pistons, a two-stroke cycle with uniflow scavenging by sub-piston compressors, a single-shaft movement conversion mechanism with two crank-and-cardan units.

The evaluation engine has the following design parameters:

• · power - 35 hp,

• · speed - 3, 000 rpm,

• · specific fuel consumption - 170 g/hp,

• · dry weight - 85 kg,

• · life time till the 1-st overhaul - 10,000 hr,

• · dimensions: length 720 mm, width 420 mm, height 390 mm.

Due to an optimal combination of both known and fundamentally new - protected with 12 RF patents - approaches in its design, the evaluation engine has a number of substantially new qualities, ensuring the following advantages for consumers and manufacturers as compared with domestic and foreign power analogs:

• · weight and dimensions are 1.5 to 3 times less;

• · fuel consumption is 5% to 15% less;

• · emission of harmful substances at the level of the UNECE requirements;

• · reduced vibration and noisiness;

• · higher operational processability;

• · assortment and quantity of parts, 1.5 to 2 times less;

• · labor input, 1.5 to 2 times less;

• · cost 20% to 30% less.

The conversion mechanism of this engine has never been previously used in engine-making. Use of cylinder bearing alone is its distinguishing feature. Since bearing load in this mechanism does not exceed corresponding loads in the connecting rod gear it will for the first time allow for the creation of a spatial conversion mechanism of the engine with a life time of at least not less than that of the traditional ones. In addition, this mechanism ensures a more continuous piston stay near the upper dead center. The efficiency of using the two-stroke diesel cycle with uniflow scavenging is ensured by the new means of operation and the original design of sub-piston air compressors.

The cylinder-and-piston unit is made as a plug-in module. It allows for the creation of a family of 20 to 70 hp engines with a high (up to 70%) degree of unification of parts and engines and similar weight-and-mass characteristics by changing primarily the cubic capacity of the module.

There are plans to develop modifications of the engine operating on light and gas fuels. The design of the module allows for the later use of a new, simple and reliable way of changing a working body compression degree.

Apossibility for improving the principal specific characteristics of the engine's design by 10% to 30% is envisaged through wide use of polymer composites and structural ceramics at their existing level of physical and mechanical properties. It is facilitated by the structure, geometrical characteristics and conditions of operation of the engine's principal parts and units which allow for the creation of much more favorable conditions for using new materials than do engines based on the traditional design.

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