Abstract An anti-pollution device for an internal combustion engine, in which an excess of combustion air is used, comprises means adapted to spray an aqueous liquid into the fuel-air mixture of the engine, with a flow which is greater when the load is high than when the load is low, so as to act at high loads to reduce the content of nitrogen oxides. The aqueous liquid may be sprayed into the fuel inlet track upstream of the throttle, or into a carburettor, or into an additional air supply duct, or into the combustion chamber itself. Preferably load sensitive means are arranged to control the flow of aqueous liquid in such a manner that this flow is at its maximum when the load is high, medium when the load is medium, and zero when the load is low.
An anti-pollution device for an engine having combustion chamber means, an induction pipe for feeding fuel-air mixture to said combustion chamber means, a throttle in said induction pipe, and air feeding means for supplying an excess of combustion air in said induction pipe, said device comprising load-sensitive liquid feeding means for spraying an aqueous liquid into the fuel-air mixture of the engine, said load sensitive feeding means comprising a liquid source, said air feeding means comprising a conduit having a throttle therein, means for feeding liquid from said liquid source into said conduit upstream of the last-named throttle and means responsive to engine load to spray said liquid at a liquid flow rate which is at its maximum when the load is high; medium when the load is medium and zero when the load is low.
Claim 2
Dependent Claim
136 words
An anti-pollution device for an engine having combustion chamber means, an induction pipe for feeding fuel-air mixture to said combustion chamber means, a throttle in said induction pipe, and air feeding means for supplying an excess of combustion air in said induction pipe, said device comprising load-sensitive liquid feeding means for spraying an aqueous liquid into the fuel-air mixture of the engine, said load sensitive feeding means comprising a liquid source, said air feeding means comprising a conduit having a throttle therein, means for feeding liquid from said liquid source into said conduit upstream of the last-named throttle and means responsive to engine load to spray said liquid at a liquid flow rate which is at its maximum when the load is high; medium when the load is medium and zero when the load is low.
Claim 3
Dependent Claim
19 words
A device as claimed in claim 1, said conduit emptying into said induction pipe downstream of the first-mentioned throttle.