Exhaust gas recirculation in a reciprocating engine with continuously regenerating particulate trap

An engine comprising:

• a first reciprocating cylinder;
• a second reciprocating cylinder;
• an exhaust manifold, configured to provide an egress path for exhaust emissions from the first reciprocating cylinder and the second reciprocating cylinder;
• an intake manifold, configured to provide an input path for an air fuel mixture to the first reciprocating cylinder and the second reciprocating cylinder;
• an exhaust gas recirculating (EGR) subsystem comprising:
• an after treatment system;
• and
• an EGR cooler in series with said after treatment system, wherein the EGR subsystem routes exhaust emissions from the first reciprocating cylinder back to the intake manifold;
• and
• a direct injection means, configured to directly inject at least one fuel into one of the first cylinder and the second cylinder, further wherein at least one of:
• an injection timing of the first cylinder is retarded as compared to an injection timing of the second cylinder;
• and
• an injection timing of the second cylinder is advanced as compared to an injection timing of the first cylinder.

A method comprising:

• routing air to a donor cylinder and a non-donor cylinder of a reciprocating engine;
• combusting an air fuel mixture in the donor cylinder and the non-donor cylinder;
• routing exhaust gas from the non-donor cylinder through an exhaust manifold;
• recirculating exhaust gas from the donor cylinder through an aftertreatment system and a cooler back to the intake manifold of the donor cylinder and the non-donor cylinder;
• directly injecting at least one fuel directly into one of the first cylinder and the second cylinder;
• retarding an injection timing of the first cylinder;
• and
• advancing an injection timing of the second cylinder.

A method comprising:

• recirculating exhaust gas from a first cylinder of a reciprocating engine to an intake stream or air-fuel mixture of the first cylinder and a second cylinder of the reciprocating engine, whereby:
• the recirculated exhaust gas from the first cylinder flows through an after treatment system;
• and
• the recirculated exhaust gas is cooled to a lower temperature after the after treatment system;
• routing exhaust gas from the second cylinder through an exhaust manifold;
• directly injecting at least one fuel directly into one of the first cylinder and the second cylinder;
• and one of:
• retarding an injection timing of the first cylinder;
• and
• advancing an injection timing of the second cylinder.

A method comprising:

• flowing recirculating exhaust gas from a first cylinder of a reciprocating engine through an after treatment system;
• cooling the recirculating exhaust gas after the after treatment system, wherein the after treatment system comprises one of a diesel particulate filter, a diesel oxidation catalyst, a flow-through filter, a three-way catalyst, and a selective catalytic reduction catalyst;
• recirculating exhaust gas from a first cylinder of the reciprocating engine to a compressor;
• routing exhaust gas from the second cylinder through a turbine;
• compressing the intake stream or air-fuel mixture to the first cylinder and the second cylinder and the recirculating exhaust gas with a compressor, wherein the compressor is operatively attached to the turbine;
• directly injecting at least one fuel directly into one of the first cylinder and the second cylinder;
• and one of:
• retarding an injection timing of the first cylinder;
• and
• advancing an injection timing of the second cylinder.

A method comprising:

• recirculating exhaust gas from a first cylinder of a reciprocating engine back to the reciprocating engine;
• flowing the recirculating exhaust gas through an after treatment system and a first turbine;
• cooling the recirculating exhaust gas after the first turbine;
• compressing the recirculating exhaust gas after the cooling with a first compressor, wherein the first compressor is operatively attached to the first turbine;
• recirculating the compressed recirculating exhaust gas to the intake stream or air-fuel mixture to the first cylinder and the second cylinder;
• routing exhaust gas from the second cylinder through a second turbine;
• and
• compressing the intake stream or air-fuel mixture of the second cylinder with a second compressor, wherein the compressor is operatively attached to the second turbine.