System for supply of LPG/ammonia for direct-injection petrol or diesel engines

Abstract

A system for supply of LPG / ammonia for direct-injection petrol or diesel engines comprises, in combination: an electronic control unit; a petrol / diesel tank and petrol / diesel supply means; an original high- pressure pump of the vehicle (7),- an LPG / ammonia tank and supply means; an additional radiator with cooling fan (10); original high-pressure injector rail (17) of the vehicle; an adapter (19)connected to the high-pressure pump (7), which enables circulation and return of the LPG / ammonia to the tank; an original electronic control unit (20) of the vehicle; and a distribution assembly withsolenoid valves and / or non-return valves (21), which combines the devices for opening the passage for delivery and return of 'the LPG / ammonia in the liquid phase, and vice versa, in which with modalities, succession, and times pre-set according to the modalities of operation of the engine with LPG / ammonia or petrol / diesel fuelling, switching of operation of the engine with LPG / ammonia fuelling orpetrol / diesel fuelling, arrest of the engine, and modalities requested by the driver.

Description

Background technique [0001] Gasoline / diesel engine manufacturers are now increasingly oriented towards direct injection fueling managed by electronic control units, which present increasingly sophisticated technical strategies required to optimize engine fueling and thus easily obtain the best possible combustion And the lowest emission of unburned particles in the exhaust gas, because the catalytic converter and probe provided by the engine cannot perform the same function as the engine, so the injection fuel supply of the engine cannot be managed by the electronic control unit. [0002] Recently, due to rising gasoline and diesel prices, pollution rates especially in metropolitan areas have been increasing, and responses to environmental problems caused by pollution have been rising, so that automobiles, including new brands of Cars with the possibility to be fueled not only by gasoline / diesel but also by LPG (liquefied petroleum gas) / ammonia. [0003] The conversion of the...

AI Technical Summary

Problems solved by technology

[0003] The conversion of these engines to LPG / ammonia was necessarily accompanied by considerable difficulties, the difficulty being that it was impossible to replicate the fueling strategy thus required, since the engines were equipped with special injectors which operated at very high pressures next work

[0004] Assuming such a requirement, some manufacturers of systems convert direct-injection gasoline engines to gaseous LPG, but in order to obtain the operation of the engines, they have to resort to compromises, with consequent anomalous states governed by different operating strategies, That is, an engine with LPG runs only at a given rpm, and during periods of idle or when maximum power is required, the engine runs on gasoline, thus making the switch to LPG far more inconvenient for consumers

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