Patent ID: 11885259
Assignee: TIANJIN UNIVERSITY
Field: Engines, pumps, turbines (Mechanical engineering)
Classification: CPC F  Y | IPC F

Claim 0:
1. An ammonia-hydrogen blended fuel control system based on reactivity regulation, comprising a vehicle-mounted ammonia-hydrogen fuel supply system, an ammonia-hydrogen blended fuel premixed combustion engine and an electronic control unit (ECU), wherein
the ECU is configured for controlling the ammonia-hydrogen blended fuel premixed combustion engine and the vehicle-mounted ammonia-hydrogen fuel supply system and regulating injection quantities and pressure values of ammonia fuel and hydrogen to be fed into the ammonia-hydrogen blended fuel premixed combustion engine;
the vehicle-mounted ammonia-hydrogen fuel supply system comprises a low-pressure liquid ammonia supply unit and a vehicle-mounted hydrogen production unit, and is configured for providing the ammonia fuel and the hydrogen for the ammonia-hydrogen blended fuel premixed combustion engine, wherein the low-pressure liquid ammonia supply unit is configured for providing the ammonia fuel with a pressure range of 0.5-1.0 MPa, and the vehicle-mounted hydrogen production unit is configured for providing the hydrogen with a pressure range of 1.0-2.0 MPa; wherein the low-pressure liquid ammonia supply unit comprises an ammonia storage tank, a heater, a pressure stabilizing tank and a pressure controller which are connected in sequence, and the ammonia storage tank is filled with liquid ammonia; and the vehicle-mounted hydrogen production unit comprises a vehicle-mounted hydrogen generator, a high-pressure hydrogen storage tank and a pressure controller which are connected in sequence;
the ammonia-hydrogen blended fuel premixed combustion engine comprises an engine cylinder head, a cylinder sleeve, a piston, a main combustion chamber, an air inlet pipe, an exhaust channel, an ammonia injector and a first hydrogen injector, and also comprises a turbulent jet ignition device arranged on the engine cylinder head and provided with a pre-chamber, wherein the ammonia injector and the first hydrogen injector which face the engine cylinder head are respectively arranged on the air inlet pipe, and the ammonia fuel and hydrogen which are injected into the air inlet pipe form ammonia-hydrogen blended fuel in the air inlet pipe; the turbulent jet ignition device is configured for realizing a double injection mode of air and hydrogen injection alone and a scavenging mode of air injection alone, or an air entrainment injection mode of hydrogen-air mixture injection and a scavenging mode of hydrogen-air mixture injection; the turbulent jet ignition device comprises a pre-chamber cavity and a spark plug;
in a working process of the ammonia-hydrogen blended fuel control system, the low-pressure liquid ammonia supply unit provides the ammonia fuel with the pressure range of 0.5-1.0 MPa under the regulation of the ECU, and then the ammonia fuel is divided into two parts, one part of the ammonia fuel enters the ammonia injector through a pipeline, and another part of the ammonia fuel enters the vehicle-mounted hydrogen production unit to participate in hydrogen production; and the vehicle-mounted hydrogen production unit provides the hydrogen with the pressure range of 1.0-2.0 MPa under the regulation of the ECU, and then the hydrogen is divided into two parts, one part of the hydrogen is injected into the air inlet pipe by the first hydrogen injector, and the hydrogen injected into the air inlet pipe is mixed with the ammonia fuel to form the ammonia-hydrogen blended fuel in the air inlet pipe, wherein a hydrogen injection amount of the first hydrogen injector is regulated by the ECU so that the ammonia-hydrogen blended fuel can be realized in the air inlet pipe, and another part of the hydrogen is supplied to the turbulent jet ignition device and ignited by the spark plug in the pre-chamber cavity to form a jet flame in the main combustion chamber, and then the ammonia-hydrogen blended fuel is ignited in the main combustion chamber to complete combustion work.