A system includes an exhaust passage and a waste heat recovery system. The exhaust passage is structured to fluidly couple to an exhaust manifold of an engine, and to receive exhaust gas from the engine. The waste heat recovery system includes a working fluid circuit, a superheater, and an expander. The working fluid circuit includes a pump to circulate a working fluid through the working fluid circuit, including through the engine. Heat is transferred from the engine to the working fluid. The superheater is positioned along the working fluid circuit downstream of the engine. The superheater is fluidly coupled to the exhaust passage and transfers heat from the exhaust gas to the working fluid. The expander is positioned along the working fluid circuit downstream of the superheater. The expander generates useful energy from the heat transferred to the working fluid from the exhaust gas and the engine.

A heat exchanger in one aspect of the present disclosure comprises a plurality of plate parts. The plurality of plate parts is arranged such that respective outer surfaces of mutually-adjacent plate parts of the plurality of plate parts are in a non-contact state having a gap between the respective outer surfaces, and apexes, each of which is an apex of the at least one convex protruding from each of respective mutually-facing outer surfaces of the mutually-adjacent plate parts, do not face each other in an arrangement direction of the plurality of plate parts.

Methods and systems are provided for controlling the temperature and ratio of gases within a gas mixing tank reservoir and selectively charging/discharging gases from the reservoir to one or both of an intake system or an exhaust system. In one example, a method (or system) may include storing exhaust gas and/or compressed intake air into a gas mixing reservoir, and increasing or decreasing flow of coolant to the reservoir based on engine operating conditions. The stored gases may be discharged to an intake system and/or an exhaust system based on requests from a controller, and coolant flow to the reservoir may be adjusted based on the composition of the gases stored within the reservoir.

Methods and systems are provided for adjusting a location of a fuel injection in response to a substitution rate and a desired EGR flow. In one example, a method may include injecting a first fuel to a combustion chamber via a direct injector positioned to inject directly into the combustion chamber, injecting a second, different, fuel to the combustion chamber via an exhaust port injector positioned to inject toward an exhaust valve of the combustion chamber, and combusting the first and second fuels together in the combustion chamber.

Methods and systems are provided for adjusting a location of a fuel injection in response to a substitution rate and a desired EGR flow. In one example, a method may include injecting a first fuel to a combustion chamber via a direct injector positioned to inject directly into the combustion chamber, injecting a second, different, fuel to the combustion chamber via an exhaust port injector positioned to inject toward an exhaust valve of the combustion chamber, and combusting the first and second fuels together in the combustion chamber.

An EGR cooling system for a vehicle may include an EGR cooler having an inlet at a first side and an outlet at a second side thereof, in which a gas channel may be disposed between the inlet and the outlet for heat exchange with coolant in coolant channels, and the outlet may be connected to a water pump, in an engine having a separable cooling system that includes the coolant channels individually formed in each of an engine head and an engine block of the engine, to control the supply of coolant.

An EGR cooling system for a vehicle may include an EGR cooler having an inlet at a first side and an outlet at a second side thereof, in which a gas channel may be disposed between the inlet and the outlet for heat exchange with coolant in coolant channels, and the outlet may be connected to a water pump, in an engine having a separable cooling system that includes the coolant channels individually formed in each of an engine head and an engine block of the engine, to control the supply of coolant.

The present invention relates to a compact heat exchange device, applicable to either EGR (Exhaust Gas Recirculation) systems for reducing nitrogen oxide emission, or to WHRS systems (Waste Heat Recovery Systems), both in internal combustion engines. The design of the heat exchanger is characterized by a configuration that incorporates technical solutions intended for compensating for the differential expansions between the tube bundle and the shell, as well as other variables relating to thermal fatigue, where said solutions result in a compact device.

The present invention relates to a compact heat exchange device, applicable to either EGR (Exhaust Gas Recirculation) systems for reducing nitrogen oxide emission, or to WHRS systems (Waste Heat Recovery Systems), both in internal combustion engines. The design of the heat exchanger is characterized by a configuration that incorporates technical solutions intended for compensating for the differential expansions between the tube bundle and the shell, as well as other variables relating to thermal fatigue, where said solutions result in a compact device.

An internal combustion engine including a crankcase (1) and including a cylinder head is described, including at least one cylinder block, at least one planar flange surface for accommodating at least one cooler (2), at least one cooler (2), at least one coolant inlet to the cooler (2), at least one coolant outlet (8) from the cooler (2), at least one exhaust gas inlet to the cooler (2), at least one integrated exhaust gas feedthrough from the cooler (2), and at least one internal cooling section (3).