Patent ID: 8180556

Claim:
A system for supply of LPG/ammonia for direct-injection petrol or diesel engines, comprising: an electronic control unit for regulation and control of switching strategies ( 1 ); a petrol/diesel tank provided on the vehicle ( 2 ); a petrol/diesel pump provided on the vehicle ( 3 ); one or more supplementary petrol/diesel pumps ( 4 ); a petrol/diesel-delivery solenoid valve ( 5 ); a petrol/diesel non-return valve ( 6 ); an original high-pressure pump of the vehicle ( 7 ); an LPG/ammonia pressure regulator ( 8 ); an LPG/ammonia-return valve ( 9 ); an additional radiator with cooling fan ( 10 ); an LPG/ammonia non-return valve ( 11 ); an LPG/ammonia tank ( 12 ); an LPG/ammonia pump ( 13 ); an LPG/ammonia-delivery solenoid valve ( 14 ); an LPG/ammonia non-return valve ( 15 ); a supplementary LPG/ammonia injector ( 16 ); an original high-pressure injector rail ( 17 ) of the vehicle; an adapter ( 19 ) connected to the high-pressure pump ( 7 ), which adapter ( 19 ) enables circulation and return of the LPG/ammonia to the tank; an original electronic control unit ( 20 ) of the vehicle; and a distribution assembly with solenoid valves ( 21 ), which combines the devices for opening the passage for delivery and return of the LPG/ammonia in the liquid phase; in which with modalities, succession, and times pre-set according to: the mode of operation of the engine with LPG/ammonia or petrol/diesel, switching of operation of the engine with LPG/ammonia fuelling or petrol/diesel fuelling, arrest of the engine, and the modalities requested by the driver, the control unit ( 1 ) governs the petrol/diesel pump ( 3 ), the supplementary petrol/diesel pump ( 4 ), the petrol/diesel-delivery solenoid valve ( 5 ), the LPG/ammonia-return solenoid valve ( 9 ), the LPG/ammonia pump ( 13 ), the supplementary LPG/ammonia pump ( 27 ), the LPG/ammonia-delivery solenoid valve ( 14 ), and the LPG/ammonia injector ( 16 ), wherein, only one of LPG/ammonia and petrol/diesel is fed to the engine at any point in time, and a combination of i) LPG and petrol, ii) LPG and diesel, iii) ammonia and petrol, and iv) ammonia and diesel is never fed to the engine.