System and methods for extracting water from exhaust gases for water injection

A method, comprising:

• extracting condensate from exhaust gases flowing through a second cooler, the second cooler arranged downstream of a first cooler in a passage disposed between and exhaust and intake of an engine, and storing the extracted condensate;
• injecting the extracted condensate at an intake manifold;
• and
• adjusting one or more of an amount of the exhaust gases flowing through the second cooler and an amount of coolant flow through the second cooler based on an amount of stored extracted condensate.

A system for an engine, comprising:

• an intake including an intake manifold arranged upstream of cylinders of the engine;
• an exhaust gas recirculation (EGR) passage arranged between the intake and an exhaust of the engine, the EGR passage including a first EGR cooler and a second EGR cooler disposed downstream of the first EGR cooler;
• a bypass passage coupled to the EGR passage, between the first and second EGR coolers, and to the intake;
• and
• a controller including non-transitory memory with instructions for:
• during a first condition, flowing exhaust gases to the intake via the first EGR cooler and second EGR cooler;
• during a second condition, flowing a first portion of the exhaust gases to the intake via the first EGR cooler and second EGR cooler while flowing a remaining, second portion of the exhaust gases to the intake via the first cooler only and the bypass passage;
• and
• during both the first and second conditions, extracting condensate from the exhaust flow at the second cooler.