초록 ▼

A system for supply of LPG/ammonia for direct-injection petrol or diesel engine includes an electronic control unit where the control unit governs a petrol/diesel pump, a supplementary petrol/diesel pump, a petrol/diesel-delivery solenoid vale, LPG/ammonia-return solenoid valve, LPG/ammonia pump, a

A system for supply of LPG/ammonia for direct-injection petrol or diesel engine includes an electronic control unit where the control unit governs a petrol/diesel pump, a supplementary petrol/diesel pump, a petrol/diesel-delivery solenoid vale, LPG/ammonia-return solenoid valve, LPG/ammonia pump, a supplementary LPG/ammonia pump, a LPG/ammonia-delivery solenoid vale and a LPG/ammonia injector, such that 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.

대표청구항 ▼

1. A system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines,of vehicles comprising a petrol/diesel tank (2), a petrol/diesel pump (3), an original high-pressure pump (7), an original high-pressure injector rail (17) and an original electronic control unit (20); said

1. A system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines,of vehicles comprising a petrol/diesel tank (2), a petrol/diesel pump (3), an original high-pressure pump (7), an original high-pressure injector rail (17) and an original electronic control unit (20); said system 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) ofmeans (16; 23) for controlling delivery of the amount of fuel that is lacking according to the r.p.m. and the vehicledemand of the engine for proper carburetion;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; anda 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, andthe 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, anda combination of i) LPG and petrol, ii) LPG and diesel, iii) ammonia and petrol, and iv) ammonia and diesel is never fed to the engineand the LPG/ammonia-delivery solenoid valve (14). 2. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that the supplementary petrol/diesel pump (4) operating in combination with the petrol/diesel pump (3) provided on the vehicle increases the pressure of the petrol/diesel fuel forcing the outflow of the gas present in the high-pressure pump (7) and preparing the system for the subsequent starting. 3. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that the control unit (1) for regulation and control of the switching strategies, during switching of the supply from petrol/diesel to LPG/ammonia, sends an enabling signal to the supply of the LPG/ammonia pump (13) and to the LPG/ammonia-delivery solenoid valve (14), and after a predetermined period of time, deactivates the petrol/diesel pump (3) and supplies the LPG/ammonia-return solenoid valve (9). 4. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that the control unit (1) for regulation and control of the switching strategies, during starting of the engine with LPG/ammonia fuelling, supplies the petrol-delivery solenoid valve (5), and, after a certain period of time, the petrol/diesel pump (3), the supplementary petrol/diesel pump (4), and the LPG/ammonia-return solenoid valve (9) are automatically activated for a predetermined period of time; in this way, the gasified liquid is eliminated from the circuit and in particular from the high-pressure pump (7); once the set time, has elapsed the control unit (1) deactivates the supplementary petrol/diesel pump (4) and the LPG/ammonia-return solenoid valve (9), keeping, instead, active for a further period of time, the petrol/diesel-delivery solenoid valve (5) and the petrol/diesel pump (3), ensuring operation of the engine with petrol/diesel fuelling; upon expiration of the predetermined time the petrol/diesel-delivery solenoid valve (5) and the pump (3) are deactivated, whilst the LPG/ammonia pump (13), the LPG/ammonia-delivery solenoid valve (14), and the LPG/ammonia-return solenoid valve (9) are activated. 5. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that the control unit (1) for regulation and control of the switching strategies, during switching-off of the engine with LPG/ammonia fuelling, supplies for a predetermined period of time, the petrol-delivery solenoid valve (5), and, after 1 second, the petrol/diesel pump (3), the supplementary petrol pump (4), and the LPG-return solenoid valve (9) are supplied for 5 seconds; upon elapse of the 6 seconds, the petrol-delivery solenoid valve (5), the petrol pump (3) and the supplementary petrol pump (4) are deactivated, whilst the LPG-return solenoid valve (9) remains open for 120 seconds to enable outflow of the LPG imprisoned in the circuit of the high-pressure pump, thus preventing, on account of the heat of the engine, any rise of the pressure and its gasification, preparing the engine for petrol/diesel-fuelled starting. 6. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that the control unit (1) for regulation and control of the switching strategies, during switching of operation from LPG/ammonia to petrol/diesel, activates the petrol-delivery solenoid valve (5) and, after 1 second, activates the supplementary petrol pump (4); it deactivates the LPG pump (13) and the LPG-delivery solenoid valve (14), whilst the LPG-return solenoid valve (9) is kept active for 2 seconds, after which it is deactivated simultaneously with the supplementary petrol/diesel pump (4). 7. The system for supply of LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that, to make up for differences between fuels and solve lean carburation due to differences of the specific weight of fuels, the control unit (1) for regulation and control of the switching strategies automatically manages the supplementary injector (16) of the LPG/ammonia so as to deliver the amount of fuel that is lacking according to the r.p.m, and the demand of the engine for proper carburation. 8. The system for supply of LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that, to make up for differences between fuels and solve lean carburation due to differences of the specific weight of fuels, the control unit (1) for regulation and control of the switching strategies automatically manages the current of the LPG/ammonia pump (13) by varying the voltage and consequently the power of the pump so as to supply the pressure suitable for delivery of the amount of fuel necessary according to the r.p.m, and the demand of the engine for proper carburation. 9. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that connected to the high-pressure pump (7) is the adapter device (19), which enables circulation and return of the liquid in excess during operation with LPG/ammonia preventing gasification thereof and ensuring optimal carburation. 10. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 5, characterized in that the pulse to the control unit (1) for carrying out the procedure during switching-off of the engine with LPG/ammonia-fuelled operation is issued by the command for arrest of the engine. 11. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 4, characterized in that the pulse to the control unit (1) for carrying out the procedure during starting of the engine with LPG/ammonia-fuelled operation is issued by a purposely provided contact (18), which signals opening of the door on the driver side with the engine turned off, instead of by switching-on of the dashboard. 12. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that there is envisaged installation of a radiator equipped with an electric fan connected to the control unit (1) through an output activated by the control unit (1) itself when the engine turns at a rate of less than or equal to 1000 r.p.m.; the supplementary radiator has the function of cooling the LPG, thus preventing increase of the pressure in the tank (12), preventing the problems of overpressure in the supply circuit and the drawbacks in supply on account of the high pressure in the tank itself. 13. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that the original electronic control unit (20) of the vehicle manages, during operation, in the same way the strategies of carburation of both the petrol/diesel and the LPG/ammonia, governing the rail of the injectors (17) indistinctly and in the same way according to the type of fuel selected. 14. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that the control unit (1) for regulation and control of the switching strategies on diesel engines manages via a wiring (22) also the opening signal to be sent to the injectors with a pre-set delay so as to guarantee that the combustion, given the diversity of the fuels, does not occur in advance. 15. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that the devices for distribution of the corresponding fuels are inserted in a single distribution assembly (21). 16. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that it further comprises a supplementary LPG/ammonia pump (27) on the LPG/ammonia supply line. 17. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 16, characterized in that, during starting of the engine with LPG/ammonia fuelling, the control unit (1) for regulation and control of the switching strategies activates, for a given time, the supplementary LPG/ammonia pump (27) and the LPG/ammonia pump (13), and the LPG/ammonia-delivery solenoid valve (14) and the LPG/ammonia-return solenoid valve (9). 18. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 16, characterized in that, in the case where the control unit (1) for regulation and control of the switching strategies is set for fuelling the engine with LPG/ammonia, a purposely provided contact (18) signals opening of the door on the driver side with the engine turned off to the control unit (1), which, appropriately programmed, activates immediately the supplementary LPG/ammonia pump (27), the LPG/ammonia pump (13), the LPG/ammonia-delivery solenoid valve (14), and the LPG/ammonia-return solenoid valve (9), for a programmed time; and in that, after said programmed time, said operation is performed by switching-on of the dashboard. 19. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that it further comprises a valve for discharge of the LPG/ammonia overpressure (26). 20. The system for supply ofsupplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that said distribution assembly (21) further comprises non-return valves (24, 25, 28). 21. The system for supplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that said means for controlling delivery of the amount of fuel that is lacking according to the r.p.m. and the demand of the engine for proper carburation comprise a supplementary LPG/ammonia injector (16) that is automatically managed by the control unit for regulation and control of the strategies (1). 22. The system for supplying LPG/ammonia for direct-injection petrol or diesel engines according to claim 1, characterized in that said means for controlling delivery of the amount of fuel that is lacking according to the r.p.m. and the demand of the engine for proper carburation comprise a fuel high-pressure sensor (23) whose signal is managed by the control unit for regulation and control of the strategies (1).