Turbocharged engine water vapor ingestion control techniques determine a dew point of a charge air cooler (CAC) in an induction system of the engine based on measured humidity and temperature of a mixture of (i) air drawn into the induction system and (ii) exhaust gas produced by the engine that is cooled and recirculated by a low pressure cooled exhaust gas recirculation (LPCEGR) system of the engine back into the induction system. When the mixture temperature is less than the CAC dew point, a condensate accumulation in the CAC is determined. When the CAC condensate accumulation does not satisfy a set of one or more thresholds, the mixture temperature is increased. When the CAC condensate accumulation satisfies the set of one or more thresholds, an amount of the exhaust gas that is cooled and recirculated by the LPCEGR system is decreased until the mixture temperature meets the CAC dew point.

Systems are provided for a mounting assembly providing structural support to a pair of turbocharger and charge air coolers. In one example, the mounting assembly may include support brackets and pedestals for coupling the turbochargers and the charge air coolers to one structure. Separate channels for applying lubricant and coolant to the turbochargers and the charge air coolers may be coupled to the mounting assembly.

An intercooler assembly includes: a cooler main body having a heat exchange unit; an upper tank including an intake receiving portion connected to the heat exchange unit, and coupled to an upper portion of the cooler main body; a lower tank including an intake discharge portion connected to the heat exchange unit, and coupled to an lower portion of the cooler main body; a bypass receiving portion connected to a valve mounting portion, and forming a passage partitioned separately from the intake receiving portion; a bypass line portion that is provided at an exterior of the cooler main body and includes: an inlet connected to the bypass receiving portion and an outlet connected to the intake discharge portion; and a valve unit connected to the intake receiving portion and the bypass receiving portion.

Systems are provided for a mounting assembly providing structural support to a pair of turbocharger and charge air coolers. In one example, the mounting assembly may include support brackets and pedestals for coupling the turbochargers and the charge air coolers to one structure. Separate channels for applying lubricant and coolant to the turbochargers and the charge air coolers may be coupled to the mounting assembly.

An intake air circuit is structured to transmit intake air from a turbocharger compressor to an intake manifold of an engine. A charge air cooler (“CAC”), a bypass line, and a bypass heater are each positioned along the intake air circuit in parallel with each other. A first control valve is structured to controllably divert the intake air around the CAC. A second control valve is structured to controllably divert the intake air around at least one of the bypass line and the bypass heater. A controller operatively coupled to each of the engine, and the first and second control valves is structured to control each of the first and second control valves to cause the intake air to flow along a determined desired flow path based on each of measured ambient temperature and measured engine load.

Methods and systems are provided for controlling coolant flow through parallel branches of a coolant circuit including an AC condenser and a charge air cooler. Flow is apportioned through each of an air-conditioning condenser, a charge air cooler (CAC), and a transmission oil cooler (TOC) of the coolant circuit to maintain an estimated transmission oil temperature (TOT) below a threshold. The TOT is estimated from a torque converter slip ratio.

A fuel system is comprising: a fuel tank; an internal combustion engine; a fuel regulator fluidly connecting the fuel tank to the engine, the fuel regulator being configured to reduce the pressure of the fuel from a first fuel pressure at the fuel tank to a second fuel pressure at the engine; an air supply assembly configured to supply air from an air inlet to the engine, the air assembly comprising: a first air supply line fluidly connecting the air inlet and the engine, the first air supply line being in thermal communication with the fuel regulator; a second air supply line fluidly connecting the air inlet and the engine, the second air supply line being in parallel with the first air supply line; and an air valve configured to adjust the air flowing through at least one of the first air supply line and the second air supply line.

An internal combustion gasoline engine includes an air heater coupled to an intake duct of the engine in a heat transfer relationship with air in the intake duct. A combustion pre-chamber is also formed in the head of the engine. The pre-chamber is at least partially separated from the combustion chamber by a wall. One or more apertures are formed through the wall and provide fluid communication paths from the combustion chamber to the pre-chamber, feeding a mixture of air and fuel from the combustion chamber to the pre-chamber. The apertures further define a plurality of combustion paths allowing ignited fuel and air from the pre-chamber to efficiently enter and combust the fuel and air mixture within the combustion chamber. The air heater and the combustion pre-chamber increase combustion efficiency from a first efficiency level to a second efficiency level greater than the first efficiency level.

A cooling system for an internal combustion engine comprises a fluid circuit having an intercooler, a main cooler and a precooler. The intercooler is configured for receiving coolant and configured for heat exchange relation between the coolant and engine compressed air. The main cooler is configured for receiving the coolant from the intercooler and the internal combustion engine and configured for selectively delivering a first portion of the coolant from the main cooler to the precooler. The precooler is configured to deliver a flow of the coolant to the intercooler. The main cooler and the precooler are configured for cooling the coolant by heat exchange with at least one cooling flow.

A physics-based charge temperature model to calculate a charge air temperature for an automobile vehicle includes multiple variables. The multiple variables include: a first variable defining an engine speed of an engine defining revolutions per minute of a crankshaft of the engine; a second variable defining a cam position; a third variable defining an engine coolant temperature; a fourth variable defining an air intake temperature; a fifth variable defining an engine air flow; and a sixth variable defining a firing fraction of the engine. A controller provides multiple lookup tables. The controller controls operation of the engine using the multiple variables and data in the multiple lookup tables to calculate a charge air temperature for individual intake strokes of at least one cylinder of the engine.