Apparatuses and methods are disclosed including heat exchanger for an internal combustion engine. The heat exchanger can include a main body, a manifold and one or more outlet ports. The main body can have an inlet and an outlet to receive/pass a coolant on a first side thereof. The main body can have a fluid inlet and fluid outlet configured to receive a fluid. The main body can pass the fluid in a heat exchange relationship with the coolant. The manifold can be coupled to the main body on a second side. The manifold can be in fluid communication with a main coolant outlet passage to receive a portion of the coolant from the main body. The one or more outlet ports can be fluidly connected to the manifold and passing the portion of the coolant to one or more engine auxiliary systems.

A system for flushing a cooling water pathway of a marine propulsion device with water supplied from a water source includes a water control device and a controller. The water control device is connected to the water source and the cooling water pathway of the marine propulsion device. The controller controls and causes the water control device to supply the water from the water source to the cooling water pathway so as to perform the flushing. The controller obtains propulsion device data including at least one of a pressure of the water, a flow rate of the water and a concentration of salt contained in the water in the cooling water pathway. The controller determines whether or not to stop a supply of the water by the water control device based on the propulsion device data.

An internal combustion system capable of exactly determining timing of exchanging a coolant of an engine. The internal combustion system includes an engine, cooling circulation mechanism circulating the coolant containing ethylene glycol to the engine while cooling it, temperature sensor measuring the temperature of the coolant having passed through the engine, and control device. The control device includes a number of cold starts counting unit determining engine cold start and counting the number of cold starts before coolant exchange, an accumulated amount of time measuring unit measuring an accumulated amount of time when the coolant temperature measured by the temperature sensor is a defined temperature or higher before the coolant exchange, and an exchange determination unit determining the need for coolant exchange, when the accumulated amount of time is a defined amount of time or greater and the number of cold starts is a defined number of times or greater.

An internal combustion system capable of exactly determining timing of exchanging a coolant of an engine. The internal combustion system includes an engine, cooling circulation mechanism circulating the coolant containing ethylene glycol to the engine while cooling it, temperature sensor measuring the temperature of the coolant having passed through the engine, and control device. The control device includes a number of cold starts counting unit determining engine cold start and counting the number of cold starts before coolant exchange, an accumulated amount of time measuring unit measuring an accumulated amount of time when the coolant temperature measured by the temperature sensor is a defined temperature or higher before the coolant exchange, and an exchange determination unit determining the need for coolant exchange, when the accumulated amount of time is a defined amount of time or greater and the number of cold starts is a defined number of times or greater.

A selector guide valve in cooling system of an internal combustion engine is provided. The selector guide valve includes a first control drum independently rotatable and including an inlet receiving engine coolant from a pump and a plurality of coolant openings extending through the first control drum and a second control drum independently rotatable, circumferentially surrounding the first control drum, and including a plurality of coolant openings extending through the second control drum.

A thermal management system for a vehicle may be selectively controlled to supply heat from any one of a plurality of different heat sources, to any one of a plurality of different heat sinks. The heat sources may include: an internal combustion engine, a cylinder head, an exhaust gas heat recovery system, an exhaust gas recirculation system, or a turbocharging system. The heat sinks may include: the internal combustion engine, the cylinder heat, an engine oil cooler, a transmission oil cooler, and a heating core. Each of an engine oil cooler control valve, a transmission oil cooler control valve, a heating core control valve, an engine block control valve, a cylinder head control valve, a bypass control valve, and a heat transfer control valve are controlled to effectuate a desired operating mode for the thermal management system.

An internally cooled internal combustion piston engine and method of operating a piston engine is provided, with the combination of liquid water injection, higher compression ratios than conventional engines, and leaner air fuel mixtures than conventional engines. The effective compression ratio of the engines herein is greater than 13:1. The engines may employ gasoline or natural gas and use spark ignition, or the engines may employ a diesel-type fuel and use compression ignition. The liquid water injection provides internal cooling, reducing or eliminating the heat rejection to the radiator, reduces engine knock, and reduces NOx emissions. The method of engine operation using internal cooling with liquid water injection, high compression ratio and lean air fuel mixture allow for more complete and efficient combustion and therefore better thermal efficiency as compared to conventional engines.

A governing system of an engine coolant control system in which first and second portions of coolant are pumped from an engine to a regulator and back to the engine and from the engine to a radiator and back to the engine, respectively, is provided. The governing system includes a temperature sensor of the engine to sense coolant temperatures, an ambient temperature sensor of the radiator to sense ambient temperatures, a heating element disposed to heat the first portion of the coolant at one of a location upstream from the regulator and the regulator, a valve operably disposed along a section of piping through which the first portion of the coolant flows from the engine to the regulator and a controller which controls operations of the heating element and the valve in accordance with the readings of the temperature sensor of the engine and the ambient temperature sensor.

The present disclosure provides an engine cooling system having a coolant temperature sensor, including a radiator disposed to release heat of coolant circulated in an engine; a coolant control valve unit controlling the coolant circulated in the radiator through opening rate of a valve having a coolant passage corresponding to the radiator; a second coolant temperature sensor sensing a coolant temperature at a coolant outlet side of the engine; a third coolant temperature sensor sensing the coolant temperature at the coolant outlet side of the radiator; and a control unit sensing second and third coolant temperatures through the second and third coolant temperature sensors, calculating a first coolant temperature at a coolant inlet side of the engine by calculating the second and third coolant temperatures, and calculating valve opening rate of the coolant control vale by using the first, second, and the third coolant temperature.

The present disclosure provides an engine cooling system having a coolant temperature sensor, including a radiator disposed to release heat of coolant circulated in an engine; a coolant control valve unit controlling the coolant circulated in the radiator through opening rate of a valve having a coolant passage corresponding to the radiator; a second coolant temperature sensor sensing a coolant temperature at a coolant outlet side of the engine; a third coolant temperature sensor sensing the coolant temperature at the coolant outlet side of the radiator; and a control unit sensing second and third coolant temperatures through the second and third coolant temperature sensors, calculating a first coolant temperature at a coolant inlet side of the engine by calculating the second and third coolant temperatures, and calculating valve opening rate of the coolant control vale by using the first, second, and the third coolant temperature.