Texaco Inc.

Kashmir S Virk

Sheldon Herbstman

Martin Alperstein

Nicholas Benfaremo

Theodore E Nalesnik

Robert B Burns

Michael A Caggiano

Henry E Leikkanen

Roger L Leisenring, Jr

Diesel fuel comprising a glycolated Mannich coupled bis-succinimide

Diesel fuel detergent additive

A diesel fuel and injector cleaning additive which comprises a solvent such as a (C.sub.3 -C.sub.5) alcohol and an amino alkylene-substituted asparagine.

Diesel fuel injector cleaning additive

Deposits in fuel injectors of diesel engines may be decreased by addition to diesel fuel of an ether primary amine.

Middle distillate fuel containing deposit inhibitor

A filter for treating a particulate containing exhaust gas stream being discharged from an internal combustion engine. The filter includes a compressible bed through which the exhaust gas flows, said bed being comprised of a mass of randomly disposed metallic fibers which define particulate retaining flow passages. The bed is formed with at least one segment being compressed to a greater density than other similar segments whereby to effect a desired gas flow path through the respective bed segments, and a more uniform distribution.

Method and apparatus for filtering engine exhaust gas

Method for rejuvenating the exhaust gas filter for a diesel engine in which the engine's power output can be varied by eliminating the function of one or more cylinders during a period of engine operation. Said method includes immobilizing at least one, and preferably a number, of the engine's cylinders by maintaining the respective intake, and optionally the exhaust valves, in a fixed position. When exhaust gas is at a relatively low temperature, particle incineration is achieved by periodically injecting a small amount of fuel into the immobilized cylinder. The fuel is carried by the exhaust gas stream into the filter, where it is contacted by a catalyst bed to ignite the gas and to thereby raise it to a sufficient temperature to ignite retained combustible particles.

Method for rejuvenating an exhaust gas filter for a diesel engine

Control means for a diesel engine in which the engine's power output can be varied by eliminating the function of one or more cylinders during a period of engine operation. Said control means immobilizes at least one, and preferably a number of the engine's cylinders by maintaining the respective intake, and optionally the exhaust valves, in a fixed position. During periods of cylinder immobilization, the engine exhaust gas filter is rejuvenated by incinerating combustible particles therefrom. When exhaust gas is at a relatively low temperature, particle incineration is achieved by injecting fuel into the immobilized cylinder. The fuel is carried by the exhaust gas stream into the filter. In the latter, the fuel/gas mixture when contacted by a catalyst bed, ignites to raise the gas to a sufficient temperature to ignite retained combustible particles.

Internal combustion engine with exhaust filter rejuvenation

A system for filtering combustible particulate matter from an exhaust gas stream, and for periodically rejuvenating the filter by thermally incinerating retained particles prior to their reaching the main filter. At least a part of the exhaust gas stream which enters the filter bed is periodically heated in a pretreating chamber. The latter comprises a catalyst coated oxidizing bed into which fuel, and heated air are metered to initiate combustion. The products of said combustion are thereafter combined with the exhaust gas to bring it to a sufficient temperature to incinerate the carried particles.

Method for cyclic rejuvenation of an exhaust gas filter and apparatus

Apparatus for filtering combustible particles from an exhaust gas stream, and for periodically rejuvenating the filter bed and catalyst section thereof, by incinerating retained particles. At least a portion of an engine's exhaust gas stream is initially preheated for the purpose of raising the catalyst to a predetermined 'lightoff' temperature. A small amount of a supplementary fuel is brought into heat exchange contact with portions of the filter interior or exterior to elevate this fuel to a suitable temperature. The heated supplementary fuel is then intermixed with the exhaust gas stream prior to the latter entering the catalyst section, thereby causing the fuel/gas mixture to react. Subsequent to initiation of the oxidation reaction, further preheating energy input to increase the exhaust gas to 'lightoff' temperature, can be discontinued without affecting the combustible particle incineration rate.

Exhaust gas torch apparatus

Method for filtering combustible particles from an exhaust gas stream, and for periodically rejuvenating the filter bed and catalyst section thereof, by incinerating retained particles. At least a portion of an engine's exhaust gas stream is initially preheated in the catalyst section to raise said section to a predetermined 'lightoff' temperature. A supplementary fuel is then introduced to the heated exhaust gas stream prior to the latter entering the catalyst section, thereby causing the fuel/gas mixture to react. Subsequent to initiation of this oxidation reaction, further preheating energy input to increase the exhaust gas to 'lightoff' temperature, can be discontinued without affecting the combustible particle incineration rate.

Method for treating an exhaust gas stream

Filter apparatus for filtering combustible particles from an exhaust gas stream, and for periodically rejuvenating the filter bed and catalyst section thereof, by incinerating retained particles. At least a portion of an engine's exhaust gas stream is initially preheated in the catalyst section to raise said section to a predetermined 'lightoff' temperature. A supplementary fuel is then introduced to the heated exhaust gas stream prior to the latter entering the catalyst section, thereby causing the fuel/gas mixture to react. Subsequent to initiation of this oxidation reaction, further preheating energy input to increase the exhaust gas to 'lightoff' temperature, can be discontinued without affecting the combustible particle incineration rate.

Catalytic exhaust gas torch

Exhaust gas recirculation system for an automotive engine in which that portion of the exhaust stream is selectively withdrawn which contains the major amount of undesirable ingredients. Said portion of gas from each cylinder is received in a common mixing chamber and thereafter passed to the inlet side of the engine for mixing with fresh charge entering the combustion chamber.

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Hopewell Junction, NY, United States of America

Kashmir S Virk