TURBO-COMPOUND SUPERCHARGED ENGINE UNIT Russian patent published in 2016 - IPC F02B37/13 F02B37/10 F02B37/14 F02B41/10 

FIELD: engines and pumps.

SUBSTANCE: invention can be used in turbo-compound engine units with supercharging. Control method is intended for turbo-compound engine unit, containing internal combustion (ICE) engine (1), having inlet line (2) and discharge line (20), low pressure (11) compressor and high pressure compressor (5), installed in said inlet line (2) in the direction of air flow, high pressure (6) turbine and low pressure turbine (7) installed in discharge line along the flow of gases. High pressure turbine (6) is connected with low pressure compressor (11) shaft, low-pressure turbine (7) is connected with high pressure compressor (5). Low-pressure turbine (7) and high pressure compressor (5) are connected with engine crankshaft. Turbo-compound engine unit includes first bypass mechanism (3, 4) to bypass the high pressure compressor (5), first measuring transducer for measuring exhaust gases temperature, second measuring transducer for determination of lambda value, device for measuring pressure downstream and upstream of said low pressure compressor, engine braking device and engine speed sensor. Method includes step of first bypass mechanism deactivation, if at least one of the following conditions is met - exhaust gas temperature exceeds specified value, value of lambda is below preset value, pressure difference in intake line (2) exceeds at least low pressure compressor (11) surge value, engine braking device is activated, engine speed is lower than specified value. Value of lambda is defined as AFR/AFR_{stoichiometric}, where AFR (air-fuel ratio) is defined as the air mass, divided by the weight of fuel, and AFR_{stoichiometric} is equal to 14.545 for diesel engines. Disclosed is turbo-compound engine unit.

EFFECT: technical result consists in improvement of heat losses recovery.

11 cl, 5 dwg