AIR HYBRID ENGINE WITH SPLIT CYCLE (VERSIONS) Russian patent published in 2010 - IPC F02B25/00 

FIELD: engines and pumps.

SUBSTANCE: proposed engine comprises crankshaft, power piston, selective-control power cylinder to set power piston into running or idling mode, compression cylinder fitted in compression cylinder to slide therein articulated with said crankshaft. Selective-control power cylinder to set power piston into running or idling mode, air reservoir fitted between compression cylinder and power cylinder to selectively receive compressed air form compression cylinder and to feed compressed air into power cylinder to be used in power transfer to crankshaft, and valves that selectively control gas flow forced into compression cylinder and power cylinder and air reservoir and out of them so that engine can operate in three modes, including ICE, air compressor (AC) and pre-compressed air accumulation (PCA). In ICE mode, compression piston and power piston are in compression and working modes, respectively. Compression piston sucks air in to compress it in power cylinder. Compressed airs comes in power cylinder at the working stroke beginning together with fuel to be ignited, fired and expand in the same stroke to transfer power to crankshaft, while combustion products are forced out at the exhaust stroke. In AC mode, compression piston sucks air accumulated in said reservoir in and compresses it for use in power cylinder. IN PCA mode, power piston receives compressed air from said reservoir to expand it in working stroke and transfer power to crankshaft. Expanded air is released in exhaust stroke. Note here that compressed air from compression cylinder does not come into air reservoir. Proposed invention covers also another two versions of hybrid engine.

EFFECT: hybrid engine with split cycle.

34 cl, 6 dwg