CN-122014475-A - Energy-saving thermal management method and system for engine

CN122014475ACN 122014475 ACN122014475 ACN 122014475ACN-122014475-A

Abstract

The invention relates to the field of engines and discloses an energy-saving heat management method and system for an engine, wherein the system comprises an electric control unit and a cooling device, the cooling device comprises a cylinder sleeve water heater, a first temperature regulating valve, a fresh water pump and a sea water pump, the method is that after the engine runs normally, the cylinder sleeve water heater is controlled to stop, the temperature of the inner circulating water is compared with the preset temperature of the inner circulating water, the opening of the first temperature regulating valve is controlled according to a comparison result, the fresh water pump is controlled to run at different rotation speeds, and the sea water pump is controlled to run at different rotation speeds or alarm is triggered. Therefore, the invention effectively reduces the energy consumption in the running process by detecting the temperature of the internal circulating water in real time and matching corresponding different rotating speeds for the fresh water pump and the sea water pump according to the temperature of the internal circulating water in the running process of the engine, ensures that the internal circulating water is in the using temperature range, and reduces the influence of the engine on the service life of the engine due to the overhigh or overlow temperature of the internal circulating water.

Inventors

MENG QINGJIAN
YIN XIAOQING
WANG SHAOQUN
ZHANG GUIQIN
DU JIHUA
REN JIGANG
WANG HUDONG
KANG WEICHAO

Assignees

潍柴重机股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260414

Claims (10)

1. The energy-saving heat management method for the engine is applied to an energy-saving heat management system of the engine, and comprises a cooling device, wherein the cooling device comprises a cylinder sleeve water heater, a first temperature regulating valve, a fresh water pump and a sea water pump, and is characterized by comprising the following steps: s10, acquiring the temperature of internal circulating water; S20, after the engine normally operates, controlling a cylinder sleeve water heater to stop heating, judging whether the temperature of the internal circulating water is less than T1, judging whether the temperature of the internal circulating water is in a [ T1, T2 ] interval, judging whether the temperature of the internal circulating water is in a [ T2, T3) interval, and judging whether the temperature of the internal circulating water is more than or equal to T3, wherein T1 is less than T2 and less than T3; S30, if the temperature of the internal circulating water is smaller than T1, generating a corresponding first water temperature control signal; if the temperature of the internal circulating water is within the range of [ T1, T2 ], generating a corresponding second water temperature control signal; if the temperature of the internal circulating water is within the range of [ T2, T3 ], generating a corresponding third water temperature control signal; If the temperature of the internal circulating water is greater than or equal to T3, generating a corresponding internal circulating water alarm signal; s40, controlling a first temperature regulating valve to start a small cycle according to a first water temperature control signal, controlling a fresh water pump to operate according to a retarding V1, and controlling a seawater pump to stop operating; According to the second water temperature control signal, the first temperature control valve is controlled to be in a half-open state, the fresh water pump is controlled to operate at a medium speed V2, and the sea water pump is controlled to operate at a slow speed V4; According to the third water temperature control signal, the first temperature control valve is controlled to be in a full-open state, the fresh water pump is controlled to operate at a high speed V3, and the sea water pump is controlled to operate at a medium speed V5; and controlling the fresh water pump to run at a high speed V3 according to the internal circulating water alarm signal, controlling the sea water pump to run at a high speed V6, and triggering the internal circulating water temperature alarm.
2. The engine energy saving thermal management method of claim 1, further comprising the steps of: s50, obtaining the temperature of the seawater; s60, judging whether the temperature of the seawater is less than T4, judging whether the temperature of the seawater is within a [ T4, T5 ] interval, and judging whether the temperature of the seawater is greater than or equal to T5; S70, if the temperature of the seawater is less than T4, generating a corresponding first revision signal; if the temperature of the seawater is within the range of [ T4, T5), generating a corresponding maintenance signal; if the temperature of the seawater is greater than or equal to T5, generating a corresponding second revision signal; s80, controlling the rotation speed of the seawater pump to be reduced by n1 according to the first revision signal; Controlling the sea water pump to maintain the rotating speed according to the maintaining signal; And controlling the rotation speed of the seawater pump to rise by n2 according to the second revision signal.
3. The engine energy saving thermal management method of claim 1, further comprising, after said S10, the steps of: when the engine is in a standby state, judging whether the temperature of the internal circulating water is less than T1; And if the temperature of the internal circulating water is less than T1, controlling the water heater of the cylinder sleeve to start heating, and stopping heating until the temperature of the internal circulating water is T1.
4. The engine energy saving thermal management method of claim 1, wherein the engine energy saving thermal management system further comprises a lubrication device comprising an engine oil heater, a second attemperator, and an electric pre-feed oil pump; the S10 further comprises the steps of obtaining the temperature of engine oil; The S20 further comprises the steps of controlling the engine to normally run and controlling the engine oil heater to stop heating; Between S10 and S20, the method further comprises the steps of: S12, when the engine is in a standby state, controlling an electric pre-feed oil pump to start, judging whether the engine oil temperature is less than t1, judging whether the engine oil temperature is in a [ t1, t 2) interval, judging whether the engine oil temperature is in a [ t2, t 3) interval, and judging whether the engine oil temperature is more than or equal to t3; S14, if the temperature of the engine oil is less than t1, generating a corresponding first oil temperature control signal; If the engine oil temperature is within the range of [ t1, t 2), generating a corresponding second oil temperature control signal; If the engine oil temperature is within the range of [ t2, t 3), generating a corresponding third oil temperature control signal; if the temperature of the engine oil is greater than or equal to t3, generating a corresponding engine oil alarm signal; s16, controlling a second temperature regulating valve to enable engine oil to flow to an engine oil heater according to the first oil temperature control signal so as to preheat the engine oil; according to the second oil temperature control signal, controlling the second temperature control valve to be in a half-open state, dividing engine oil into two paths, wherein one path of engine oil flows back to an internal oil duct of the engine after being heated by an engine oil heater, and the other path of engine oil directly flows back to the internal oil duct of the engine; According to the third oil temperature control signal, the second temperature control valve is controlled to be in a full-open state, engine oil directly flows back to an internal oil duct of the engine, and the engine oil heater is controlled to stop heating; And according to the engine oil alarm signal, controlling the engine oil heater to stop heating and triggering an engine oil alarm.
5. The engine energy conservation thermal management method according to claim 4 wherein the engine energy conservation thermal management system further comprises an air intake device comprising an air filter and an intake heater; The S10 further comprises the steps of acquiring an air inlet temperature; The S20 further comprises the steps of normally operating the engine, judging whether the air inlet temperature is smaller than H1, judging whether the air inlet temperature is in a [ H1, H2) interval, judging whether the air inlet temperature is in a [ H2, H3) interval and judging whether the air inlet temperature is larger than or equal to H3; The S30 further includes: if the air inlet temperature is smaller than H1, generating a corresponding first air temperature control signal; if the air inlet temperature is in the section of (H1, H2), generating a corresponding second air temperature control signal; If the air inlet temperature is in the section of [ H2, H3), generating a corresponding third air temperature control signal; If the air inlet temperature is greater than or equal to H3, generating a corresponding stop signal; The S40 further includes: according to the first temperature control signal, controlling an air inlet heater to heat according to preset air inlet power P1; controlling an air inlet heater to heat according to a preset air inlet power P2 according to a second air temperature control signal; Controlling an air inlet heater to heat according to a preset air inlet power P3 according to a third air temperature control signal, wherein P1 is more than P2 is more than P3; And controlling the air inlet heater to stop heating according to the stop signal.
6. The engine energy saving thermal management method of claim 5, further comprising the steps of: when the engine is started, if the air inlet temperature is smaller than H1, the air inlet heater is controlled to start heating, and if the air inlet temperature is larger than or equal to H3, the air inlet heater is controlled to stop heating.
7. The engine energy saving thermal management method of claim 5, wherein the engine energy saving thermal management system further comprises a human-machine interaction unit; The thermal management method further comprises the following steps: acquiring a man-machine interaction signal; judging whether the man-machine interaction signal is a low-environment-temperature signal, an medium-environment-temperature signal or a high-environment-temperature signal; And controlling the cooling device, the lubricating device and/or the air inlet device according to a preset mode according to the comparison result.
8. An energy-saving heat management system of an engine comprises an electric control unit and a cooling device which are in communication connection, wherein the cooling device comprises a cylinder sleeve water heater, a first temperature regulating valve, a fresh water pump, a heat exchanger, a sea water pump, an internal circulating water temperature detection unit and a sea water temperature detection unit which are communicated with the engine, the internal circulating water temperature detection unit detects the temperature of the internal circulating water and transmits the internal circulating water temperature to the electric control unit, the sea water temperature detection unit detects the temperature of the sea water and transmits the temperature to the electric control unit, After the engine normally runs, the electric control unit compares the temperature of the internal circulating water with the preset internal circulating water temperature, and controls the first temperature regulating valve, the fresh water pump to run at different rotating speeds and the sea water pump to run at different rotating speeds according to the comparison result; the electric control unit compares the sea water temperature with a preset sea water temperature, and controls the sea water pump to reduce, maintain or increase the normal rotation speed according to the comparison result.
9. The energy-saving thermal management system of claim 8, further comprising a lubrication device in communication with the electronic control unit, the lubrication device comprising an oil heater, a second thermostat valve, an electric pre-feed pump, and an oil temperature detection unit, the oil temperature detection unit detecting an oil temperature and transmitting to the electronic control unit; after the engine runs normally, the electronic control unit controls the engine oil heater to stop heating; When the engine is in a standby state, the electric control unit compares the engine oil temperature with a preset engine oil temperature, and controls the engine oil heater to heat according to preset engine oil power or controls the engine oil heater to stop heating and trigger engine oil alarm according to a comparison result.
10. The engine energy saving thermal management system of claim 8, further comprising an air intake device in communication with the electronic control unit, the air intake device comprising an air filter, an air intake heater, and an air intake temperature detection unit that detects an air intake temperature and transmits to the electronic control unit; When the engine is started, the electric control unit controls the air inlet heater to start heating when the air inlet temperature is smaller than a preset air inlet temperature H1, and controls the air inlet heater to stop heating when the air inlet temperature is larger than or equal to a preset air inlet temperature H3; when the engine normally operates, the electric control unit compares the air inlet temperature with the preset air inlet temperature, and controls the air inlet heater to heat according to the preset air inlet power or controls the air inlet heater to stop heating according to the comparison result.

Description

Energy-saving thermal management method and system for engine Technical Field The invention relates to the technical field of engines, in particular to an energy-saving heat management method and system for an engine. Background In addition, the reliability of the engine can be damaged due to multiple cold start failures, and in the running process, the existing engine thermal management system cools water with different temperatures in the same power cooling mode, so that a large amount of energy consumption is wasted, and the running cost of a user is increased. The existing water boiler generally adopts manual control to heat the internal circulating water, and the heated internal circulating water can play a certain role in heating engine oil, but cannot automatically stop after reaching a specified temperature, and is difficult to realize independent and efficient circulating preheating of the engine oil. The prior air inlet device generally adopts a heating grid with fixed power to heat cold air entering a cylinder, and the one-cut power heating mode causes unnecessary energy waste. In the existing cooling device, the fresh water pump and the sea water pump usually run at a constant speed, and the flow cannot be adjusted in real time according to the changes of the temperature of the internal circulating water and the temperature of the sea water, so that a large amount of ineffective energy consumption is wasted under the low-load or low-temperature working condition. Disclosure of Invention Aiming at the defects, the technical problem to be solved by the invention is to provide the energy-saving thermal management method and the system for the engine, which can be used for detecting the temperature of the internal circulating water in real time in the running process of the engine, and matching different corresponding rotating speeds for the fresh water pump and the sea water pump according to the temperature of the internal circulating water, so that the energy consumption in the running process is effectively reduced. In order to solve the technical problems, the technical scheme of the invention is as follows: The energy-saving heat management method for the engine is applied to an energy-saving heat management system of the engine, and comprises a cooling device, wherein the cooling device comprises a cylinder sleeve water heater, a first temperature regulating valve, a fresh water pump and a sea water pump, and comprises the following steps: s10, acquiring the temperature of internal circulating water; S20, after the engine normally operates, controlling a cylinder sleeve water heater to stop heating, judging whether the temperature of the internal circulating water is less than T1, judging whether the temperature of the internal circulating water is in a [ T1, T2 ] interval, judging whether the temperature of the internal circulating water is in a [ T2, T3) interval, and judging whether the temperature of the internal circulating water is more than or equal to T3, wherein T1 is less than T2 and less than T3; S30, if the temperature of the internal circulating water is smaller than T1, generating a corresponding first water temperature control signal; if the temperature of the internal circulating water is within the range of [ T1, T2 ], generating a corresponding second water temperature control signal; if the temperature of the internal circulating water is within the range of [ T2, T3 ], generating a corresponding third water temperature control signal; If the temperature of the internal circulating water is greater than or equal to T3, generating a corresponding internal circulating water alarm signal; s40, controlling a first temperature regulating valve to start a small cycle according to a first water temperature control signal, controlling a fresh water pump to operate according to a retarding V1, and controlling a seawater pump to stop operating; According to the second water temperature control signal, the first temperature control valve is controlled to be in a half-open state, the fresh water pump is controlled to operate at a medium speed V2, and the sea water pump is controlled to operate at a slow speed V4; According to the third water temperature control signal, the first temperature control valve is controlled to be in a full-open state, the fresh water pump is controlled to operate at a high speed V3, and the sea water pump is controlled to operate at a medium speed V5; and controlling the fresh water pump to run at a high speed V3 according to the internal circulating water alarm signal, controlling the sea water pump to run at a high speed V6, and triggering the internal circulating water temperature alarm. Preferably, the thermal management method further comprises the following steps: s50, obtaining the temperature of the seawater; s60, judging whether the temperature of the seawater is less than T4, judging whether the temperature of the seawater is within a [ T4, T5 ] in