Control of an internal combustion engine system in response to a condensation condition associated with a charge air cooler is disclosed. One or more operating parameters of the internal combustion engine are monitored to the control charge air cooler coolant inlet temperature to keep the charge temperature above the estimated dew point to reduce or prevent condensation upstream of the intake manifold.

An engine includes: two cylinder rows so placed as to be aligned side by side; a turbocharger; and an intercooler shared by the two cylinder rows, and connected to the turbocharger. The intercooler has: a cool liquid flow path through which a cool liquid flows, and an intake air flow path through which intake air from the turbocharger flows. The cool liquid flow path has an inlet and outlet of the cool liquid on one side in a first direction along the flow of the cool liquid. The intake air flow path has an inlet of the intake air on one side in a second direction along the flow of the intake air, and an outlet of the intake air on another side.

An integrated intercooler apparatus, which is supplied with intake air and recirculating exhaust gas, and cools the intake air and the recirculating exhaust gas, may include: a heat exchanger in which gas passageways through which the intake air and the recirculating exhaust gas pass and coolant passageways through which a coolant passes are alternately formed from a front side to a rear side thereof; and a variable device which controls an area of an exhaust gas supply region and an area of an intake air supply region at a front side of an inlet side of the heat exchanger.

An intake manifold drain assembly of an engine comprises a drain tube connected to a bottom of a manifold chamber; an oil separator connected to an engine block; and a controlled check valve connecting the drain tube to the oil separator and configured to allow liquid and gas in the manifold chamber to flow into the oil separator and control a gas flow passing the controlled check valve below a threshold flowrate.

Embodiments of methods and systems related to operating a mobile asset are provided. In one example, a method for operating a mobile asset includes supplying an engine with a fuel controller a first amount of a first fuel and a second amount of a second fuel and combusting the first fuel and the second fuel at a fuel combustion ratio in at least one cylinder of the engine, the first amount and the second amount being selected based on route information for a route along which the mobile asset is operable to travel and a projected exhaustion of the first fuel that does not precede a projected exhaustion of the second fuel, wherein the mobile asset is unable to operate with the second fuel alone.

A gas engine is provided that suppresses fluctuation of the actual air-fuel ratio even when a load fluctuates. A gas engine (1) in which at least one opening degree (D) selected from the opening degree of an air supply valve (5a) and the opening degree of a bypass valve (5b) is corrected so that an adequate target air-fuel ratio (t) is achieved, wherein a target gas pressure (Pgt) and a target gas-jetting time (Tt) of a fuel gas are calculated on the basis of fluctuations of an actual load (L), the gas pressure is corrected on the basis of the target gas pressure (Pgt), and at least one opening degree selected from the opening degree of the air supply valve and the opening degree of the bypass valve is corrected on the basis of the amounts of change in the target gas pressure (Pgt) and the target gas-jetting time.

Methods and systems are provided for adjusting combustion parameters to increase combustion stability during conditions when condensate formed in a charge air cooler may enter cylinders of an engine. In response to increased mass air flow and a condensate level in the charge air cooler, the engine may combust a rich air-fuel ratio while increasing a positive valve overlap.

Provided is a control device for an internal combustion engine that includes: a water-cooled cooler (intercooler) arranged at at least one of a portion of an intake air passage located on the upstream side of an intake port and an EGR passage; and a water pump configured to supply a cooling water with the cooler. The control device is configured: to execute a water supply operation that supplies the cooling water with the cooler by actuating the water pump when its execution condition which includes a requirement that a cooler temperature is higher than a cooling water temperature is met during stop of the internal combustion engine; and not to execute the water supply operation when the cooler temperature is lower than or equal to the cooling water temperature during stop of the internal combustion engine.

An engine includes: two cylinder rows so placed as to be aligned side by side; a turbocharger; and an intercooler shared by the two cylinder rows, and connected to the turbocharger. The intercooler has: a cool liquid flow path through which a cool liquid flows, and an intake air flow path through which intake air from the turbocharger flows. The cool liquid flow path has an inlet and outlet of the cool liquid on one side in a first direction along the flow of the cool liquid. The intake air flow path has an inlet of the intake air on one side in a second direction along the flow of the intake air, and an outlet of the intake air on another side.

A controller includes a forced-induction-device controlling section, an obtaining section that is configured to repeatedly obtain a temperature of the coolant in the intake-air cooling system, a determining section that is configured to determine whether the temperature obtained by the obtaining section is higher than or equal to a forced-induction limiting control starting temperature. On condition that the temperature of the coolant has risen to a value at which the determining section determines that the temperature obtained by the obtaining section is higher than or equal to the forced-induction limiting control starting temperature, the forced-induction-device controlling section starts a forced-induction limiting control to lower a forced-induction pressure. In the forced-induction limiting control, the forced-induction-device controlling section increases an extent of limiting of the forced induction as the temperature obtained by the obtaining section becomes closer to the boiling point.