US 2024/0318607 A1 · INTERNAL COOLING METHOD FOR ENGINES AND ENGINE IN WHICH IT IS APPLIED

Abstract

Internal cooling method for internal combustion engines, comprising any of the following stages: (a) vary the openings and closings of combustion chamber intake and exhaust elements in order to modify the functioning cycle performed by the engine, carrying out just intake and exhaust strokes, without compression or expansion strokes; (b) inject a cooling fluid inside the engine; (c) interrupt the fuel injection and ignition systems. This method can be implemented in alternation together with a thermodynamic cycle in which the engine produces work. Combustion engine in which the previously described method is applied, which comprises at least one control unit configured to act on the functioning of combustion chamber intake and exhaust elements, as well as on the injection and ignition systems, and thus implement the stages of said method.

Claims21

Dependent claims

An internal cooling method for internal combustion engines, wherein the engine comprises:

at least one combustion chamber
at least one fuel introduction system, configured to introduce fuel into the engine,
at least one combustion chamber intake element, such as an intake valve, configured to allow the introduction of fluids, such as an oxidizer, into said combustion chamber, and
at least one combustion chamber exhaust element, such as an exhaust valve, configured to allow the exit of fluids from inside said combustion chamber;
said cooling method being characterized by comprising an engine functioning cycle called ‘ventilation cycle’, suitable to be implemented alternatively together with the thermodynamic cycle normally performed in the engine, wherein this ‘ventilation cycle’ comprises at least one cycle of an intake phase followed by an exhaust phase, without performing any compression or expansion phases, by varying the functioning of the intake and exhaust elements in any of the combustion chambers, and wherein said ‘ventilation cycle’ is capable of being repeated as many times in succession as at least an electronic control unit decides, generating in the at least one combustion chamber on which said ‘ventilation cycle’ occurs, at least one sweep that is not to produce work, until the engine returns to the functioning mode in the thermodynamic cycle that it normally performs.

2 more elements

Engine cooling method according to any of the preceding claims, characterized by comprising an additional cooling stage that comprises acting on at least one fuel introduction system, so that the introduction of said fuel into any of the combustion chambers is interrupted.

Engine cooling method according to any of the preceding claims, where the engine comprises an ignition system configured to detonate the combustion of fuel, the cooling method being characterized for comprising an additional cooling stage that comprises acting on said ignition system, so that it allows the ignition to be interrupted in any of the combustion chambers.

Engine cooling method according to any of the preceding claims, where at least one of the stages of the cooling method is performed every certain number of pre-established events and during a number of also pre-established events, such as every certain time and for a certain time, or every certain number of engine revolutions and for certain number of engine revolutions.

Engine cooling method according to any of the preceding claims, where the engine comprises at least one sensor configured to detect events, such as high temperatures or certain chemical compositions of the internal fluids of the engine, and where at least one of the stages of the cooling method is performed in response to the values detected by this at least one sensor.

Engine cooling method according to any of the preceding claims, wherein the engine comprises more than one combustion chamber, the method being characterized in that any of its stages is capable of being implemented independently in any of the combustion chambers.

Dependencies are inferred from the claim text.

Internal cooling method for engines and engine in which it is applied

Life of this patent

Internal cooling method for engines and engine in which it is applied

Life of this patent

Abstract

Claims21