Internal-combustion engines – Charge forming device – Heating of combustible mixture
Reexamination Certificate
1999-06-18
2001-04-10
McMahon, Marguerite (Department: 3747)
Internal-combustion engines
Charge forming device
Heating of combustible mixture
C123S179210
Reexamination Certificate
active
06213103
ABSTRACT:
The invention relates to a device for fuel preheating in the starting and cold running phase of an internal combustion engine with direct fuel injection and hot fuel evaporation comprising at least one injection nozzle with extended nozzle holder shank and a built-in pressure independently controlled valve as well as at least one glow plug operated in any manner.
German Patent DE 195 00 184 C2 discloses an internal combustion engine with direct fuel injection and hot fuel evaporation. Guiding the injection nozzle shank through the outlet channel and using a fuel pump with constant pressure in conjunction with pressure independently controlled valves created the conditions for converting the fuel into the state of a fuel vapor immediately prior to the combustion process and thus obtaining significantly more efficient combustion. The consequences, among others, are a significant performance increase of the internal combustion engine, reduced consumption and reduced exhaust gas values.
This system, however, functions perfectly only at a corresponding operating temperature. During the starting or cold running phase, the nozzle holder shank is not yet adequately heated so that the fuel contained therein cannot be heated or converted into fuel vapor as it passes into the combustion chamber. The fuel is merely sprayed, which results in significantly poorer combustion conditions. The machine runs erratically, consumes more fuel, and emits more pollutants.
DE 26 46 069 A1 also discloses a device for preheating the fuel in the valve body
ozzle holder shank of the injection valve. In this case, preheating is accomplished by an electrically heatable resistance wire coil arranged in a closed insulating sheath around the valve body
ozzle holder shank of the injection valve.
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Kalla Josef
Kalla Markus
McMahon Marguerite
Tarolli, Sundheim, Covell Tummino & Szabo L.L.P.
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