KIT FOR THE REALIZATION OF A DUAL LPG/PETROL FUEL SYSTEM FOR OUTBOARD ENGINES FOR MOTORBOATS

摘要

The present invention relates to a kit for an LPG fuel for petrol run engines and in particular, a kit of electronic and hydraulic components for the realization of a dual fuelling LPG/petrol system (100) particularly suitable for outboard engines of boats navigating in waters with high salt content. Said kit includes a tube-bundle heat exchanger (10) and a pressure regulator (20) separated one from the other and made of antioxidant materials and devices. The heat exchanger (10) is provided at its end with two respective sacrificial anodes (12b, 11b) for the protection from corrosive galvanic currents and with one temperature sensor (11c) placed at one of said ends. The kit also includes a plurality of electrohydraulic LPG injectors (I) and an electronic control unit (CE) set to manage and adjust the operation of such injectors (I), of the pressure regulator (20) and of a plurality of other devices.;Said kit also includes an electronic commutator (SW) set for a bilateral electrical connection with the electronic control unit (CE) and includes a switch for the commutation from one feeding mode (LPG) to another feeding mode (petrol) and vice versa.

主权项

1. A kit for a dual LPG/petrol fuel system for outboard engines, the kit comprising:
a tube-bundle heat exchanger having a cylindrical body in metal alloy, the heat exchanger comprising:
i. a first end engaged by a first rubber cap of predetermined shape, the first rubber cap comprising an output plastic element having an output mouthpiece and a first sacrificial anode;ii. a second end engaged by a second rubber cap of predetermined shape, the second rubber cap comprising an input plastic element comprising:
1. a second sacrificial anode;2. a temperature sensor; and3. an input mouthpiece for receiving a predetermined water flow from a head of a combustion engine with two or four stroke system,wherein said output mouthpiece is set to a discharge of said predetermined water flow through said heat exchanger;iii. an input for receiving a high-pressure LPG fuel flow to be heated, the input placed along an outer surface of said cylindrical body in proximity to said first cap, said heat exchanger performing a heat exchange from said predetermined water flow to said high-pressure LPG fuel flow, the high-pressure LPG fuel flow heating and expanding and flowing out of a tubes bundle inside said heat exchanger, said tubes bundle being crossed by said predetermined water flow and between said input mouthpiece and said output mouthpiece;iv. an output for delivering a heated expanded LPG fuel flow, placed along the outer surface of said cylindrical body in proximity of said second cap and in correspondence of said input; and a pressure regulator comprising:
i. a first input set to receive said heated expanded LPG fuel flow from the output of said heat exchanger;ii. an output set to discharge a low-pressure LPG fuel flow;iii. a second input set to connect to a pressure manifold of said internal combustion engine;iv. a solenoid valve for controlling the opening and closing of said low-pressure LPG fuel flow, said solenoid valve being controllable via a predetermined electrical signal, said heat exchanger and pressure regulator being immune to salt corrosion and easy to place inside a cover of said combustion engine.