CN-122014454-A - Variable oil injection system of internal cooling oil cavity angle in internal combustion engine piston

CN122014454ACN 122014454 ACN122014454 ACN 122014454ACN-122014454-A

Abstract

The invention belongs to the technical field of devices for cooling pistons, and in particular relates to an oil injection system with a variable angle of an internal cooling oil cavity of an internal combustion engine piston, which comprises an acquisition component, a control component and a control component, wherein the acquisition component is used for acquiring the working condition state of the piston; the oil injection assembly comprises an oil injection seat, an execution assembly and a control assembly, wherein the oil injection seat is provided with an oil nozzle, the execution assembly comprises a control part and an execution part, the execution part is connected with the oil nozzle to drive the direction of the oil nozzle to change, and the control part controls the execution stroke of the execution part according to the working condition state information acquired by the acquisition assembly. The invention can change the oil injection angle of the cooling oil along with the working condition so as to change the oil filling rate of each internal cooling oil cavity along with the working condition, and solves the problems of unstable thermal efficiency of the internal combustion engine caused by fixed oil filling rate of the internal cooling oil cavity of the piston of the internal combustion engine, different thermal deformation degrees of each part of the piston caused by cooling temperature difference and reduced service life of the piston.

Inventors

DENG XIWEN
WEI YUAN
ZHANG ZHE
TANG WEN

Assignees

昆明理工大学

Dates

Publication Date: 20260512
Application Date: 20260305

Claims (10)

1. The oil injection system with the variable angle of the inner cooling oil cavity of the piston of the internal combustion engine is characterized by comprising the following components: the collecting assembly is used for collecting the working condition state of the piston; the oil injection assembly comprises an oil injection seat, and an oil injection nozzle is arranged on the oil injection seat; The execution assembly comprises a control part and an execution part, the execution part is connected with the oil nozzle to drive the direction of the oil nozzle to change, and the control part controls the execution stroke of the execution part according to the working condition state information acquired by the acquisition assembly.
2. The variable angle fuel injection system of an internal cooling oil cavity of an internal combustion engine piston according to claim 1, wherein the control part comprises a signal unit and a first processing unit, the signal unit is connected with the MCU of the internal combustion engine in a signal mode, and the first processing unit acquires the working condition state information acquired by the signal unit, calculates the execution stroke information of the execution part and outputs the execution stroke information to the execution part.
3. The variable angle fuel injection system of an internal cooling oil cavity of an internal combustion engine piston according to claim 1, wherein the control part comprises a sensor and a second processing unit, the sensor acquires one or more of rotation speed, temperature, pressure, vibration, flow, speed, inclination angle and acceleration, and the second processing unit acquires working condition state information acquired by the sensor, calculates execution stroke information of the execution part and outputs the execution stroke information to the execution part.
4. The variable angle oil injection system of an internal cooling gallery of an internal combustion engine piston of claim 3 wherein the actuator portion of the actuator assembly comprises one or both of a linear reciprocating mechanism and a curvilinear reciprocating mechanism.
5. The variable oil injection system for the cold oil cavity in the piston of the internal combustion engine according to any one of claims 2-3, wherein the executing part comprises an air charging device, the air charging device comprises an air charging cylinder body, a sliding block is connected in a sliding manner in the air charging cylinder body, the sliding block is in sliding sealing with the inner wall of the air charging cylinder body, air cavities are respectively formed between two sides of the sliding block and the air charging cylinder body, and a one-way air inlet valve and a one-way air outlet valve are respectively arranged on the air cavities.
6. The variable angle fuel injection system of an internal cooling oil cavity of an internal combustion engine piston according to claim 5, wherein the actuating part comprises a cylinder structure and a release valve, the cylinder structure comprises a cylinder body and a cylinder piston, the cylinder piston is slidably connected in the cylinder body, a push rod and a balance spring are arranged on one side of the cylinder piston, the push rod extends out of the cylinder body, an air inlet is arranged on the cylinder body on the side, facing away from the push rod, of the cylinder piston, the release valve is communicated with the air charging device or the cylinder structure, and the release valve is controlled by the first processing unit or the second processing unit.
7. The variable angle oil injection system for an internal cooling oil cavity of an internal combustion engine piston according to claim 6, wherein the oil injection seat comprises an oil injection cavity, a cavity is arranged in the oil injection cavity, an oil injection pipe is arranged on the oil injection cavity, the oil injection pipe is rotatably connected to the oil injection pipe, deflector rods are arranged on the oil injection pipe, pull rods are connected to the push rods, and all deflector rods are hinged to the pull rods.
8. The variable angle fuel injection system of an internal cooling oil cavity of an internal combustion engine piston according to claim 7, wherein the fuel injection assembly further comprises a gland and a sealing ring, the gland is Z-shaped, one end of the gland is provided with a mounting hole, and the sealing ring is sleeved at the joint of the fuel injection pipe and the fuel injection nozzle.
9. The variable oil injection system of the internal cooling oil cavity angle of the piston of the internal combustion engine of claim 8, wherein the end of the oil injection pipe facing the oil injection nozzle and any end of the oil injection nozzle facing the oil injection pipe are provided with limiting grooves, the oil injection pipe or the oil injection nozzle is provided with limiting blocks matched with the limiting grooves, and gaps are reserved between two sides of the limiting blocks and the inner side walls of the limiting grooves after the limiting blocks are inserted into the limiting grooves.
10. The variable angle fuel injection system of an internal cooling oil cavity of a piston of an internal combustion engine as set forth in claim 1, wherein the actuator assembly comprises a collector for collecting vibration or heat of the internal combustion engine as direct or indirect power of the actuator.

Description

Variable oil injection system of internal cooling oil cavity angle in internal combustion engine piston Technical Field The invention belongs to the technical field of devices for cooling pistons, and particularly relates to an oil injection system with a variable angle of an internal cooling oil cavity of an internal combustion engine piston. Background During operation of a piston internal combustion engine, the piston serves as one of the most central components of the piston internal combustion engine and is also one of the most severe operating conditions. Efficient cooling of the pistons is therefore critical to the design of new generation high power density internal combustion engines and to the optimization and improvement of existing models. Currently, the forced cooling method of the piston mainly comprises forced oil injection cooling and internal cooling oil cavity oscillation cooling. Compared with the former, the internal cooling oil cavity oscillation cooling has higher efficiency. In the aspect of designing an internal cooling oil cavity, a split type internal cooling oil cavity design is developed, namely, a plurality of mutually independent internal cooling oil cavities are designed in each piston. The oil injection angle of the existing oil injection nozzle of the internal cooling oil cavity is not changed, the oil filling rate of each oil cavity is always kept unchanged, heat generated by the oil injection nozzle is taken away by cooling oil under low working conditions, so that the thermal efficiency of the internal combustion engine is reduced, and the temperature difference between the end faces corresponding to the air outlet and the air inlet of the piston is increased under high working conditions, so that the thermal deformation degree of the piston parts corresponding to the internal cooling oil cavities of the piston is different, and the service life of the piston is reduced. Therefore, the fixed oil charge of the plurality of internal cooling oil chambers cannot well meet the cooling requirement of the piston under the variable working condition. Disclosure of Invention The invention aims to provide an oil injection system with a variable angle of an internal cooling oil cavity of an internal combustion engine piston, which can change the oil injection angle of cooling oil along with working conditions so as to change the oil filling rate of each internal cooling oil cavity along with the working conditions, thereby solving the problems of unstable thermal efficiency of the internal combustion engine, different thermal deformation degrees of each part of the piston caused by cooling temperature difference and reduced service life of the piston caused by fixed oil filling rate of the internal cooling oil cavity of the internal combustion engine piston. In order to achieve the purpose, the scheme of the invention is that the oil injection system with the variable angle of the cold oil cavity in the piston of the internal combustion engine comprises: the collecting assembly is used for collecting the working condition state of the piston; The oil injection assembly comprises an oil injection seat, an oil injection nozzle is arranged on the oil injection seat, and the oil injection nozzle faces to an oil inlet of the piston cold oil cavity; The execution assembly comprises a control part and an execution part, the execution part is connected with the oil nozzle to drive the direction of the oil nozzle to change, and the control part controls the execution stroke of the execution part according to the working condition state information acquired by the acquisition assembly. The working principle and the beneficial effects of the technical proposal are that the acquisition component directly or indirectly acquires the state information of the piston in the internal combustion engine in a low working condition/high working condition, and the control part of the execution component controls the execution stroke of the execution part after acquiring the working condition state information acquired by the acquisition component, thereby controlling the orientation of the oil nozzle, namely changing the included angle between the cold oil cavity oil inlet of the oil injection nozzle and the oil inlet of the internal cold oil cavity, and then changing the oil inlet angle, thereby changing the oil filling rate of the internal cold oil cavity. Especially when the piston has a plurality of internal cooling oil cavities and the oil inlets of each oil inlet cavity are all arranged together in a centralized way, the oil nozzle is arranged among the plurality of oil inlets, and the orientation of the oil nozzle is changed to distribute the proportion of cooling oil entering each internal cooling oil cavity, so that the oil filling rate of each internal cooling oil cavity is differentiated, the oil filling rate of each internal cooling oil cavity is changed along with the working condition, and t