Gas and liquid contact apparatus – Multiple diverse liquids – Water added to charge
Patent
1991-09-03
1992-09-22
Miles, Tim
Gas and liquid contact apparatus
Multiple diverse liquids
Water added to charge
123 25P, F02M 2502
Patent
active
051494663
DESCRIPTION:
BRIEF SUMMARY
TECHNICAL FIELD OF THE INVENTION
This invention relates to a water vapouriser device for supplying steam to a diesel or petrol engine.
BACKGROUND
GB 2 081 377 A discloses a water vaporiser device for supplying steam to the air intake of a diesel or petrol engine having an exhaust system, the water vapouriser device comprising:
a water boiler in heat exchange relation with the exhaust system of the engine, and
a steam reservoir having a steam inlet arranged to receive steam from the boiler, an air inlet, and an outlet arranged to supply steam to the air intake of the engine.
SUMMARY OF THE INVENTION
The present invention proposes a water vapouriser device for supplying steam to the air intake of a diesel or petrol engine having an exhaust system, the water vapouriser device comprising:
a water boiler (7) for mounting in heat exchange relation with the exhaust system of the engine, and
a steam reservoir (2) comprising a housing (107) having a steam inlet (101) for receiving steam from the boiler in use, an air inlet (105), and an outlet (102) for supplying steam to the air intake of the engine,
characterised in that the steam inlet and outlet of the steam reservoir comprise inlet and outlet pipes (101, 102) which project into the housing (107), the pipes having respective openings within the housing which are separated by a gap (103).
BRIEF DESCRIPTION OF THE DRAWINGS
The invention is exemplified in the accompanying drawings, in which:
FIG. 1 is a diagram of part of an engine incorporating a water vapouriser device of the invention,
FIG. 2 is a part-sectioned side view of the steam reservoir of the water vapouriser device,
FIG. 3 is a part-sectioned plan view of the steam reservoir of FIG. 2, and
FIG. 4 is an end view of the steam reservoir of FIG. 2 looking from the left in FIG. 2.
DETAILED DESCRIPTION OF THE DRAWINGS
FIG. 1 shows a water vapouriser of the invention applied to an engine. A water tank 10 is connected via a float chamber 9 and tubing 8 to a steam generator (boiler) 7 applied to the engine's exhaust. A steam tube 1 travels from the boiler 7 to a steam reservoir (condenser) 2, from which a steam tube 3 travels to the engine's air intake 4.
The water vapouriser has only two moving parts; a float and a needle valve.
The generator 7 produces steam which is fed through the link pipe 1 into the steam reservoir 2. The steam is then fed into the venturi of the carburettor in the case of a petrol engine, or into the intake manifold in the case of a diesel engine.
As shown in FIGS. 2 to 4, the steam reservior 2 comprises a cylindrical housing 107 having an air intake window 108 in its side wall. An air inlet pipe 105 passes axially through the housing 107, one end of the pipe 105 being provided with a filter 111 and the opposite end being provided with a plastics cap 104. A steam inlet pipe 101 passes through the window 108 and is held opposite an opening 120 in the side of the air inlet pipe 105 by straps 121 and 122 leaving a gap 103 between the end of the steam inlet pipe 101 and the opening 120. An outlet pipe 102 is secured to the air inlet pipe 105 directly opposite the opening 120, and passes out of the housing 107. The housing is provided with an external bracket 106.
The steam is fed through the condenser 2 so that the steam produced is wet. This is one of the key factors to the success of the water vapouriser. The condenser 2 also acts as a steam reservoir, thus ensuring a constant supply for sudden acceleration. Any steam produced is collected in the air stream and fed directly into the carburettor, eliminating the need for steam pressure. By feeding the steam directly into the venturi (or intake manifold) an even mixture of steam with the air and petrol vapour is ensured.
The device is self-metering in that it is controlled by the heat from the exhaust as well as being connected to the intake 4 of the carburettor. When the throttle is opened the pressure acting on the surface of the water inside the generator 7 is reduced, thus enabling steam to be produced at a lower temperatur
REFERENCES:
patent: 1304019 (1919-05-01), Brown
patent: 2927561 (1960-03-01), Eggers
patent: 4466386 (1984-08-01), Silva
patent: 4986223 (1991-01-01), Mahoney
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