Air-cooled internal combustion engine with super-charging, especially multi-fuel internal combustion engine

Claim 2

An air-cooled internal combustion engine arrangement comprising: an air-cooled internal combustion engine, combustion air inlet means for communicating combustion air to said engine, cooling air means for supplying cooling air to said engine, said cooling air being discharged from adjacent said engine after cooling said engine as discharged cooling air, supercharger means for supercharging the combustion air, heat-exchanger means arranged in the combustion air inlet means between said supercharger means and said engine, connecting line means connecting said discharged cooling air to said heat-exchanger means, first valve means arranged in said connecting line means and movable between a first position preventing passage of the discharged cooling air to said heat-exchanger means to a second position communicating said discharged cooling air into said heat-exchanger means, and second valve means which operatively communicates said discharged cooling air to the atmosphere when the first valve means is in said first position.

Claim 3

An arrangement according to claim 1, characterized by heating means arranged in the flow of the discharged cooling air leading to the heat-exchanger means, said last-mentioned heating means being heatable by the exhaust gases of the internal combustion engine.

Claim 4

An air-cooled arrangement according to claim 2, characterized in that an exhaust gas manifold of the internal combustion engine is arranged in the flow of the discharged cooling air conducted to the heat-exchanger means.

Claim 5

An arrangement according to claim 1, further comprising cooling air guide means arranged upstream of said engine for guiding the cooling air to said engine and a by-pass line connecting said cooling air guide means and said connecting line in by-passing relationship to said engine.

Claim 6

An arrangement according to claim 1, further comprising heating means arranged upstream of said engine for heating the cooling air supplied to the engine.

Claim 7

An arrangement according to claim 5, further comprising further heating means arranged in the flow of the discharged cooling air leading to the heat-exchanger means, said further heating means being heatable by the exhaust gases of the internal combustion engine.

Claim 8

An arrangement according to claim 6, wherein said further heating means includes the arrangement of an exhaust gas manifold of the internal combustion engine in the flow of the discharged cooling air being conducted to the heat-exchanger means.

Claim 9

An arrangement according to claim 5, further comprising control means for automatically turning on and off said heating means.

Claim 10

An arrangement according to claim 8, wherein said control means includes means for selectively turning on and off said heating means as a function of the outside temperature during the starting operation, during idling and at lower rotational speeds of the internal combustion engine.

Claim 11

An arrangement according to claim 1, further comprising heating means arranged in the flow of the discharged cooling air leading to the heat-exchanger means, said heating means being heatable by the exhaust gases of the internal combustion engine.

Claim 12

An arrangement according to claim 10, wherein said heating means includes the arrangement of an exhaust gas manifold of the internal combustion engine in the flow of the discharged cooling air being conducted to the heat-exchanger means.

Claim 13

An air-cooled internal combustion engine arrangement comprising: an air-cooled internal combustion engine, combustion air inlet means for communicating combustion air to said engine, cooling air means for supplying cooling air to said engine, said cooling air being discharged from adjacent said engine after cooling said engine as discharged cooling air, supercharger means for supercharging the combustion air, heat-exchanger means arranged in the combustion air inlet means between said supercharger means and said engine, tank Means for collecting said discharged cooling air, a connecting line connecting said tank means with said heat-exchanger means, cooling air guide means arranged upstream of said engine for guiding the cooling air to said engine, a by-pass line connecting said cooling air guide means and said connecting line in by-passing relationship to said engine, first valve means movable between a first position closing the connecting line with respect to the tank means and a second position closing the by-pass line with respect to said connecting line, and second valve means which in one position opens said tank means with respect to the atmosphere when the first valve means closes the connection between the tank means and the connecting line.

Claim 14

An air-cooled internal combustion engine arrangement comprising: an air-cooled internal combustion engine, combustion air inlet means for communicating combustion air to said engine, cooling air means for supplying cooling air to said engine, said cooling air being discharged from adjacent said engine after cooling said engine as discharged cooling air, supercharger means for supercharging the combustion air, heat-exchanger means arranged in the combustion air inlet means between said supercharger means and said engine, tank Means for collecting said discharged cooling air, a connecting line connecting said tank means with said heat-exchanger means, cooling air guide means arranged upstream of said engine for guiding the cooling air to said engine, a by-pass line connecting said cooling air guide means and said connecting line in by-passing relationship to said engine, first valve means movable between a first position closing the connecting line with respect to the tank means and a second position closing the by-pass line with respect to said connecting line, and second valve means which in one position opens said tank means with respect to the atmosphere when the first valve means closes the connection between the tank means and the connecting line.

Claim 15

An arrangement according to claim 12, characterized in that the engine is operable as multi-fuel internal combustion engine.

Claim 16

An arrangement according to claim 12, characterized in that the supercharger means is driven by an exhaust gas turbine.

Claim 17

An arrangement according to claim 12, wherein said discharged cooling air flows by way of a cylinder head of said engine, and wherein said by-pass line is in by-passing relationship to said cylinder head.

Claim 18

An arrangement according to claim 12, wherein said first and second valve means are connected by a linkage means, and wherein automatic control means are provided for displacing said linkage means as a function of the temperature of the supercharged air.

Claim 19

An arrangement according to claim 12, further comprising heating means arranged upstream of said engine for heating the cooling air supplied to the engine.

Claim 20

An arrangement according to claim 12, further comprising heating means arranged downstream of said engine for heating the discharged cooling air.

Claim 21

An arrangement according to claim 18, characterized in that said heating means is operated at low external temperatures during the engine starting operation, in idling and at low rotational speeds of the internal combustion engine.

Claim 22

An arrangement according to claim 19, characterized by control means for automatically turning on and off said heating means.

Claim 23

An arrangement according to claim 20, wherein said control means includes means for selectively turning on and off said heating means as a function of the outside temperature during the starting operation, during idling and at lower rotational speeds of the internal combustion engine.

Claim 24

An arrangement according to claim 21, characterized by further heating means arranged in the flow of the discharged cooling air leading to the heat-exchanger means, said further heating means being heatable by the exhaust gases of the internal combustion engine.

Claim 25

An arrangement according to claim 22, characterized in that an exhaust gas manifold of the internal combustion engine is arranged in the flow of discharged cooling air conducted to the heat-exchanger means.

Claim 26

An air-cooled internal combustion engine arrangement comprising: an air-cooled internal combustion engine, combustion air inlet means for communicating combustion air to said engine, cooling air means for supplying cooling air to said engine, said cooling air being discharged from adjacent said engine after cooling said engine as discharged cooling air, supercharger means for supercharging the combustion air, heat-exchanger means arranged in the combustion air inlet means between said supercharger means and said engine, a connecting line for communicating a temperature changing medium to said heat-exchanger means for changing the temperature of the combustion air passing through said heat-exchanger means, a first line conducting said discharged cooling air away from the engine, a second line conducting atmospheric air which is unaffected by the heat of the engine, first valve means movable between a first position communicating said connecting line with said first line and a second position communicating said connecting line with said second line, and automatic valve means for automatically controlling said first valve means such that said first valve means is in said first position during starting and low speed operation of the engine and in said second position during high speed operation of the engine, whereby said combustion air is automatically heated during low speed operation and cooled during high speed operation of the engine.

Claim 27

An air-cooled internal combustion engine arrangement comprising: an air-cooled internal combustion engine, combustion air inlet means for communicating combustion air to said engine, cooling air means for supplying cooling air to said engine, said cooling air being discharged from adjacent said engine after cooling said engine as discharged cooling air, supercharger means for supercharging the combustion air, heat-exchanger means arranged in the combustion air inlet means between said supercharger means and said engine, a connecting line for communicating a temperature changing medium to said heat-exchanger means for changing the temperature of the combustion air passing through said heat-exchanger means, a first line conducting said discharged cooling air away from the engine, a second line conducting atmospheric air which is unaffected by the heat of the engine, first valve means movable between a first position communicating said connecting line with said first line and a second position communicating said connecting line with said second line, and automatic valve means for automatically controlling said first valve means such that said first valve means is in said first position during starting and low speed operation of the engine and in said second position during high speed operation of the engine, whereby said combustion air is automatically heated during low speed operation and cooled during high speed operation of the engine.

Claim 28

An arrangement according to claim 24, wherein said engine is operable as multi-fuel internal combustion engine.

Claim 29

An arrangement according to claim 24, further comprising heating means arranged in the flow of said discharged cooling air for heating the discharged cooling air supplied to the heat-exchanger means.

Claim 30

An arrangement according to claim 26, wherein heat is supplied to said heating means from an exhaust gas manifold of the engine.

Claim 31

An arrangement according to claim 24, further comprising a second valve means having one position for communicating said discharged cooling air to atmosphere, and wherein said automatic valve control means includes means for moving said second valve means to said one position when said first valve means is in said second position.

Claim 32

An arrangement according to claim 28, further comprising heater means arranged upstream of said engine for heating the cooling air supplied to the engine during starting an initial low speed operation of the engine, whereby said discharged cooling air is heated to facilitate heating of the combustion air during starting operations.

Claim 33

An arrangement according to claim 29, further comprising further heating means arranged in the flow of said discharged cooling air for heating the discharged cooling air supplied to the heat-exchanger means.

Claim 34

An arrangement according to claim 30, wherein heat is supplied to said further heating means from an exhaust gas manifold of the engine.

Claim 35

An arrangement according to claim 24, wherein the supercharger means is driven by an exhaust gas turbine of the engine.

Claim 36

An arrangement according to claim 24, further comprising heater means arranged upstream of said engine for heating the cooling air supplied to the engine during starting and initial low speed operation of the engine, whereby said discharged cooling air is heated to facilitate heating of the combustion air during starting operations.