초록 ▼

An internal combustion engine, especially an Otto engine, with intake valves and with a fuel injector, which is arranged and designed so that it injects the fuel directly into a combustion chamber of working cylinders of the internal combustion engine. At least in the region of the neck, the intake

An internal combustion engine, especially an Otto engine, with intake valves and with a fuel injector, which is arranged and designed so that it injects the fuel directly into a combustion chamber of working cylinders of the internal combustion engine. At least in the region of the neck, the intake valves have a surface that is designed to counteract the formation of carbon deposits.

대표청구항 ▼

1. An internal combustion engine, comprising: working cylinders having a combustion chamber; intake valves; and a fuel injector arranged to inject fuel directly into the combustion chamber of the working cylinders, the intake valves having a neck and a catalytic surface at least in a region of the n

1. An internal combustion engine, comprising: working cylinders having a combustion chamber; intake valves; and a fuel injector arranged to inject fuel directly into the combustion chamber of the working cylinders, the intake valves having a neck and a catalytic surface at least in a region of the neck so as to counteract formation of carbon deposits.2. The internal combustion engine in accordance with claim 1, wherein the surface is microporous.3. The internal combustion engine in accordance with claim 1, wherein the surface is antiadhesive.4. The internal combustion engine in accordance with claim 3, wherein the antiadhesive surface consists of Cr?C?N.5. The internal combustion engine in accordance with claim 4, wherein the Cr?C?N surface has a coating thickness of 5 μm.6. The internal combustion engine in accordance with claim 1, wherein the surface is chemically inert towards predetermined elements.7. The internal combustion engine in accordance with claim 6, wherein the surface is chemically inert towards at least one of the group consisting of C, H, O and N.8. The internal combustion engine in accordance with claim 6, wherein the chemically inert surface consists of one of TiZr?C?H?N?O and TiAl?C?H?N?O.9. The internal combustion engine in accordance with claim 8, wherein the chemically inert surface has a coating thickness of 5 μm.10. The internal combustion engine in accordance with claim 1, wherein the catalytic surface consists of one of Pt and vanadium nitride (VN).11. The internal combustion engine in accordance with claim 10, wherein the surface is microrough.12. The internal combustion engine in accordance with claim 1, wherein the surface is oxidized and consists of vanadium pentoxide (V2O5).