CN112031891A - Engine starting pre-lubrication system and method based on full-time oil level monitoring - Google Patents
Engine starting pre-lubrication system and method based on full-time oil level monitoring Download PDFInfo
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- CN112031891A CN112031891A CN202010879093.5A CN202010879093A CN112031891A CN 112031891 A CN112031891 A CN 112031891A CN 202010879093 A CN202010879093 A CN 202010879093A CN 112031891 A CN112031891 A CN 112031891A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M5/00—Heating, cooling, or controlling temperature of lubricant; Lubrication means facilitating engine starting
- F01M5/02—Conditioning lubricant for aiding engine starting, e.g. heating
- F01M5/025—Conditioning lubricant for aiding engine starting, e.g. heating by prelubricating, e.g. using an accumulator
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M1/00—Pressure lubrication
- F01M1/08—Lubricating systems characterised by the provision therein of lubricant jetting means
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01M—LUBRICATING OF MACHINES OR ENGINES IN GENERAL; LUBRICATING INTERNAL COMBUSTION ENGINES; CRANKCASE VENTILATING
- F01M11/00—Component parts, details or accessories, not provided for in, or of interest apart from, groups F01M1/00 - F01M9/00
- F01M11/10—Indicating devices; Other safety devices
- F01M11/12—Indicating devices; Other safety devices concerning lubricant level
Abstract
The invention discloses an engine starting pre-lubrication system and method based on full-time oil level monitoring, which comprises a full-time engine oil quantity monitoring system and a starting pre-lubrication system; the full-time engine oil quantity monitoring system is used for acquiring the data of the engine oil capacity of the oil pan at full time, and monitoring the running state of the engine according to the comparison of the acquired data and the set data, so as to ensure that the engine oil capacity of the oil pan is in a normal state when the engine starts and in the whole operation time; the starting pre-lubrication system is used for establishing a normal oil film and a normal friction surface between a main oil passage in the engine and each rotary friction pair before starting. The engine collects the oil capacity data of the oil pan at all times, and monitors the running state of the engine according to the comparison between the collected data and the set data. The invention adopts the engine oil pre-lubrication technology to avoid the abrasion of the rotating parts of the engine caused by the insufficient lubrication of key parts when the engine is started.
Description
Technical Field
The invention relates to an engine starting pre-lubrication system and method based on full-time oil level monitoring, and belongs to the field of hydraulic excavators.
Background
At present, the height of an engine oil level of an engine of a hydraulic excavator is mainly measured by adopting a vernier, H and L scale marks are marked on the vernier, after the engine is initially started and maintained by replacing the engine oil, whether the engine oil capacity is normal is judged by reading the position of the engine oil on the scale marks of the vernier, and after the engine normally operates, a few people can check whether the engine oil level is normal, the engine oil is used as a solvent for lubrication and heat dissipation in the working process of the engine, the function of the engine oil is very important, one surface is used for realizing the engine oil capacity (consumption, fault leakage and the like in the working process), and the other surface is used for realizing the lubrication and heat dissipation of a rotating part inside the engine.
When a traditional engine is not started, because of the influence of gravity, engine oil in an oil duct of the engine body slowly flows back to an oil pan, so that the thickness of an oil film on a friction surface is small, in the starting process, a crankshaft of the engine drives a gear chamber gear, and further the engine oil pump is driven to pump the engine oil in the oil pan to each part of the engine body, the pressure of the engine oil is established after the engine is started, and usually reaches a standard pressure value in 2S after the engine is started, so that in the starting process, the engine is abraded because the oil film of the engine oil does not meet the requirement.
Disclosure of Invention
Aiming at the problems in the prior art, the invention provides an engine starting pre-lubrication system and method based on full-time oil level monitoring, which are used for controlling the starting of an engine, realizing the advanced lubrication of a main rotary friction pair of the engine and reducing the abrasion of the engine in the starting process.
In order to achieve the purpose, the invention adopts an engine starting pre-lubricating system based on full-time oil level monitoring, which comprises a full-time engine oil quantity monitoring system and a starting pre-lubricating system;
the full-time engine oil quantity monitoring system is used for acquiring the data of the engine oil capacity of the oil pan at full time, and monitoring the running state of the engine according to the comparison of the acquired data and the set data, so as to ensure that the engine oil capacity of the oil pan is in a normal state when the engine starts and in the whole operation time;
the starting pre-lubrication system is used for establishing a normal oil film and a normal friction surface between a main oil passage in the engine and each rotary friction pair before starting.
As an improvement, the full-time engine oil quantity monitoring system comprises an ignition switch, an ECM controller, an MC controller, an oil injector electromagnetic valve, an engine oil level sensor, a monitor and an alarm horn;
the ECM controller is respectively connected with the MC controller and the electromagnetic valve of the oil injector, the engine oil level sensor is connected with the MC controller, the ignition switch and the monitor are respectively connected between the ECM controller and the MC controller, and the alarm horn is connected with the monitor;
the MC controller monitors the engine oil volume value in the oil pan in real time and transmits the engine oil volume value to the ECM controller and the monitor through the CAN bus;
the ECM controller controls the opening and closing of the electromagnetic valve of the oil injector according to the comparison between the engine oil capacity value acquired by the CAN bus and a set value in the ECM controller;
the monitor collects the engine oil capacity value of the CAN bus in real time, compares the engine oil capacity value with the target value, and gives an alarm through the alarm horn when the collected value is smaller than the target value.
As an improvement, the starting pre-lubricating system comprises an ignition switch, a two-position switch, an engine oil pressure switch, a starting relay, a pre-lubricating motor and a starting motor;
the ignition switch is respectively connected with a two-position switch and an engine oil pressure switch, and the two-position switch is connected with the pre-lubricating motor through a pre-lubricating relay and is connected with the starting motor through a starting relay.
In addition, the invention also provides a using method of the engine starting pre-lubricating system, which comprises the following steps:
step S1, oil quantity monitoring of full-time engine oil
1) The MC controller and the ECM controller are powered normally, the engine oil level sensor is communicated with the MC controller through a wire harness and collects the oil level of an oil pan of the engine at all times, the engine oil level sensor is powered by the MC controller and has +5V voltage, before the engine is started, when the oil capacity of the oil pan is normal, the engine oil level sensor outputs 4.25-4.75V voltage, the ECM controller of the engine controls the engine to be started, when the signal voltage of the engine oil level sensor is less than or equal to 4.25V, the ECM controller of the engine controls the engine not to be started, and at the moment, the monitor gives an alarm through an alarm horn;
2) when the engine is started, in a pre-lubrication stage, the pre-lubrication motor sucks the engine oil in the oil pan into a preset rotating part of an engine body, the liquid level of the engine oil is reduced, and the output voltage of a signal line of an engine oil level sensor is 3.75-4.25V;
3) after the engine is started, the oil capacity of the oil pan is transmitted to all the rotating friction pairs in the engine through the oil pump and then returns to the oil pan through gravity, the oil capacity of the oil pan is reduced firstly and then is maintained in a relatively balanced state, and at the moment, the output voltage of an oil level sensor signal line is 1.5-3.75V;
step S2, starting pre-lubrication
1) The pre-lubrication motor control circuit is connected, the main circuit of the pre-lubrication motor is connected and then works, the pre-lubrication motor sucks engine oil from an engine oil sump into a main oil duct of an engine, an engine oil pressure switch located in the main oil duct detects the engine oil pressure of the main oil duct, when P is measured and is larger than P, the engine oil pressure switch is closed, a middle coil of a two-position switch is electrified, the control circuit of a starting motor is connected, the starting motor starts to work, the engine is started, and the output voltage of an engine oil level sensor signal line is 3.5-4.5V;
2) after the engine is started, the pre-lubrication motor and the starting motor do not work, the oil capacity of the oil pan is conveyed to all the rotating friction pairs in the engine through the oil pump and then returns to the oil pan through gravity, the oil capacity of the oil pan is reduced firstly and then is maintained in a relatively balanced state, and the output voltage of an oil level sensor signal line is 1.0-3.5V at the moment.
Compared with the prior art, the invention has the beneficial effects that:
1. the engine collects the oil capacity data of the oil pan at all times, and monitors the running state of the engine according to the comparison between the collected data and the set data.
2. The invention adopts the engine oil pre-lubrication technology to avoid the abrasion of the rotating parts of the engine caused by the insufficient lubrication of key parts when the engine is started.
Drawings
FIG. 1 is a schematic circuit diagram of the present invention;
FIG. 2 is a schematic view showing the mounting position of the oil level sensor in the oil pan according to the present invention;
FIG. 3 is a functional relationship of oil capacity of an oil pan of the present invention as a function of signal;
in the figure: 1. ignition switch, 2, ECM controller, 3, MC controller, 4, sprayer solenoid valve, 5, engine oil level sensor, 6, monitor, 7, warning loudspeaker, 8, two-position switch, 9, engine oil pressure switch, 10, start relay, 11, pre-lubrication relay, 12, pre-lubrication motor, 13, start motor.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below. It should be understood, however, that the description herein of specific embodiments is only intended to illustrate the invention and not to limit the scope of the invention.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs, and the terms used herein in the specification of the present invention are for the purpose of describing particular embodiments only and are not intended to limit the present invention.
As shown in fig. 1, 2 and 3, an engine start pre-lubrication system based on full-time oil level monitoring comprises a full-time oil level monitoring system and a start pre-lubrication system;
the full-time engine oil quantity monitoring system is used for acquiring the data of the engine oil capacity of the oil pan at full time, and monitoring the running state of the engine according to the comparison of the acquired data and the set data, so as to ensure that the engine oil capacity of the oil pan is in a normal state when the engine starts and in the whole operation time;
the starting pre-lubrication system is used for establishing a normal oil film and a normal friction surface between a main oil passage in the engine and each rotary friction pair before starting.
As an improvement of the embodiment, the full-time engine oil quantity monitoring system comprises an ignition switch 1, an ECM controller 2, an MC controller 3, an oil injector electromagnetic valve 4, an engine oil level sensor 5, a monitor 6 and an alarm horn 7;
the ECM controller 2 is respectively connected with the MC controller 3 and the electromagnetic valve 4 of the oil injector, the engine oil level sensor 5 is connected with the MC controller 3, the ignition switch 1 and the monitor 6 are respectively connected between the ECM controller 2 and the MC controller 3, and the alarm horn 7 is connected with the monitor 6;
the MC controller 3 monitors the engine oil capacity value in the oil pan in real time and transmits the engine oil capacity value to the ECM controller 2 and the monitor 6 through a CAN bus;
the ECM controller 2 controls the opening and closing of the electromagnetic valve 4 of the oil injector according to the comparison between the engine oil capacity value acquired by the CAN bus and a set value in the ECM controller 2;
the monitor 6 collects the engine oil capacity value of the CAN bus in real time, compares the engine oil capacity value with a target value, and gives an alarm through the alarm horn 7 when the collected value is smaller than the target value.
The working principle of the full-time engine oil quantity monitoring system is as follows:
1) the ECM controller 2 and the MC controller 3 are powered normally, and the monitor 6 works under the on state of the ignition switch 1;
2) the engine oil level sensor 5 outputs analog quantity signals, different signal values are output according to the height of the engine oil capacity of the oil pan, the engine oil level sensor 5 has +5V voltage input, when the output voltage of a signal line is 0.5V +/-0.25V, the engine oil level is not up to standard, and when the output voltage of the signal line is 1.0V-4.5V, the engine oil level is normal;
3) the ECM controller 2, the MC controller 3 and the monitor 6 transmit signals through a CAN bus; the MC controller 3 collects engine oil volume signals of an engine oil pan at full time, the ECM controller 2 controls the oil injector electromagnetic valve 4 to control starting, the monitor 6 controls the alarm horn 7, and when the engine oil volume value collected by the MC controller 3 is smaller than a target value set by a program, the monitor 6 gives an alarm through the alarm horn 7 to prompt a driver to replenish engine oil.
As a modification of the embodiment, the start pre-lubrication system includes an ignition switch 1, a two-position switch 8, an oil pressure switch 9, a start relay 10, a pre-lubrication relay 11, a pre-lubrication motor 12, and a start motor 13;
The working principle of the starting pre-lubrication system is as follows:
1) the ignition switch is connected to the "St" terminal:
the positive electrode of the storage battery passes through an ignition switch 1, an E terminal of a two-position switch 8 is connected, the positive electrode passes through an A terminal after passing through an a terminal of the two-position switch 8, a coil of a pre-lubrication relay 11 is electrified and then grounded, at the moment, a pre-lubrication motor control loop is connected, a main circuit of a pre-lubrication motor 12 is connected and then works, the pre-lubrication motor 12 sucks oil from an oil sump into a main oil duct of an engine, an oil pressure switch 9 positioned in the main oil duct detects the oil pressure of the main oil duct, when P is measured and is larger than P, the oil pressure switch is closed, a middle coil of the two-position switch 8 is electrified and is connected with a b terminal, at the moment, the control loop of a starting motor 13 is connected, the starting motor 13 starts to work, the engine starts, and in a pre-lubrication stage, the output voltage of;
2) the engine starts, the ignition switch returns to the 'ON' terminal:
after the engine is started, the crankshaft rotates to drive the gear of the front gear chamber to rotate, and then the engine oil pump is driven to work, the pre-lubrication motor 12 and the starting motor 13 do not work at the moment, the engine oil capacity of the oil pan is conveyed to all the rotating friction pairs inside the engine through the engine oil pump, then the oil pan is returned to through gravity, the engine oil capacity of the oil pan is reduced firstly and then is maintained to be in a relatively balanced state, and at the moment, the output voltage of the signal line of the oil level sensor is 1.0-3.5V.
Example 1
An engine start pre-lubrication system based on full-time oil level monitoring is shown by combining fig. 1, fig. 2 and fig. 3, wherein a circuit diagram of fig. 1 is composed of two parts, namely a full-time engine oil level monitoring and start pre-lubrication circuit, and when the system is specifically implemented, the detailed process is as follows:
one-time and full-time engine oil quantity monitoring
1) The MC controller 3 and the ECM controller 2 are powered normally, the engine oil level sensor 5 is in a three-wire system and is communicated with the MC controller 3 through a wire harness, the engine oil level sensor 5 collects the oil level of an oil pan of the engine at all times, the engine oil level sensor 5 is powered by the MC controller 3 with +5V voltage, the engine oil level sensor 5 outputs 4.25-4.75V voltage before the engine is started and the oil capacity of the oil pan is normal, the ECM controller 2 of the engine controls the engine to be started at the moment, when the signal voltage of the engine oil level sensor 5 is less than or equal to 4.25V, the ECM controller 2 of the engine controls the engine not to be started, and the monitor 6 gives an alarm through the alarm horn 7 at the moment;
2) when the engine is started, in a pre-lubrication stage, the pre-lubrication motor 12 sucks the engine oil in the oil pan into a preset rotating part of an engine body, the liquid level of the engine oil is reduced, and the output voltage of a signal line of an engine oil level sensor 5 is 3.75-4.25V;
3) after the engine is started, the oil capacity of the oil pan is conveyed to the positions between all the rotating friction pairs in the engine through the oil pump and then returns to the oil pan through gravity, the oil capacity of the oil pan is reduced firstly and then is maintained in a relatively balanced state, and at the moment, the output voltage of a signal wire of an oil level sensor 5 is 1.5-3.75V;
second, start pre-lubrication
When the ignition switch 1 is connected to the "st" and "B" terminals, the power supply + B is connected to the "E" of the two-position switch 8 and is connected to the GND through the "a" contact, at this time, the control circuit of the pre-lubrication motor 12 is connected, the pre-lubrication motor 12 starts to operate, the engine oil in the oil pan is sucked into the parts (such as a cylinder sleeve, a turbocharger, a crankshaft, a gear chamber, and the like) of the engine to be pre-lubricated, when the engine oil pressure in the main oil duct increases to a set value P, the engine oil pressure switch 9 is closed, the two-position switch 1 is connected to the "B" terminal, the control circuit of the pre-lubrication motor 12 is powered off, the pre-lubrication motor 12 does not operate, at this time, the control circuit of the starting motor 13 is connected, the starting motor 13 starts to operate, thereafter, the ignition switch 1 is connected to the "ON" and "B" terminal, after which the engine starts normally.
In addition, as shown in fig. 3, it is necessary to pay attention to the following:
a check-before-start phase: when the engine is started initially (the engine is stopped for more than 10min), the oil level of the oil pan is between H and L, the engine CAN be started normally at the moment, and when the oil level is lower than L, the ECM controller controls the engine not to be started and prompts that the oil level is low through CAN bus alarm;
and (3) a pre-lubrication stage: when the oil level value of the engine is detected to be normal, the engine can be started, when an ignition switch is switched on to be 'st', the pre-lubrication motor starts to work, oil in the oil pan enters the main oil duct of the engine, the liquid level is reduced, and at the stage, the liquid level is between the scales of 'L' and 'A';
after starting, the pre-lubrication motor stops working, the starting motor starts working, oil in the oil pan enters each system of the engine under the action of the oil pump, the liquid level further drops, and at this stage, the liquid level is between the scales of A and B;
when the engine is started again after being stopped (the stop time is less than 10min), the ECM controller does not detect the oil level, and the engine can be started normally.
The engine collects the oil capacity data of the oil pan at all times, and monitors the running state of the engine according to the comparison between the collected data and the set data. The invention adopts the engine oil pre-lubrication technology to avoid the abrasion of the rotating parts of the engine caused by the insufficient lubrication of key parts when the engine is started.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents or improvements made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (4)
1. An engine starting pre-lubrication system based on full-time oil level monitoring is characterized by comprising a full-time engine oil level monitoring system and a starting pre-lubrication system;
the full-time engine oil quantity monitoring system is used for acquiring the data of the engine oil capacity of the oil pan at full time, and monitoring the running state of the engine according to the comparison of the acquired data and the set data, so as to ensure that the engine oil capacity of the oil pan is in a normal state when the engine starts and in the whole operation time;
the starting pre-lubrication system is used for establishing a normal oil film and a normal friction surface between a main oil passage in the engine and each rotary friction pair before starting.
2. The system for engine starting and pre-lubrication based on full-time oil level monitoring as claimed in claim 1, is characterized in that the system for full-time oil level monitoring comprises an ignition switch (1), an ECM controller (2), an MC controller (3), an injector solenoid valve (4), an oil level sensor (5), a monitor (6) and an alarm horn (7);
the ECM controller (2) is respectively connected with the MC controller (3) and the oil injector electromagnetic valve (4), the engine oil level sensor (5) is connected with the MC controller (3), the ignition switch (1) and the monitor (6) are respectively connected between the ECM controller (2) and the MC controller (3), and the alarm horn (7) is connected with the monitor (6);
the MC controller (3) monitors the oil capacity value in the oil pan in real time and transmits the oil capacity value to the ECM controller (2) and the monitor (6) through a CAN bus;
the ECM controller (2) controls the opening and closing of an oil injector electromagnetic valve (4) according to the comparison between the engine oil capacity value acquired by the CAN bus and a set value in the ECM controller (2);
the monitor (6) collects the engine oil capacity value of the CAN bus in real time, compares the engine oil capacity value with a target value, and gives an alarm through the alarm horn (7) when the collected value is smaller than the target value.
3. The system of claim 2, wherein the system comprises an ignition switch (1), a two-position switch (8), an oil pressure switch (9), a starting relay (10), a pre-lubrication relay (11), a pre-lubrication motor (12) and a starting motor (13);
ignition switch (1) is connected with two position switch (8), machine oil pressure switch (9) respectively, two position switch (8) are connected with lubricated motor (12) in advance through lubricated relay (11) in advance, are connected with starter motor (13) through starter relay (10).
4. A method of using an engine start pre-lubrication system as claimed in any one of claims 1 to 3, comprising the steps of:
step S1, oil quantity monitoring of full-time engine oil
1) The MC controller (3) and the ECM controller (2) are powered normally, the oil level sensor (5) is connected with the MC controller (3) through a wiring harness, the oil level sensor (5) collects the oil level of an oil pan of an engine in full time, the oil level sensor (5) is powered by the MC controller (3) with +5V voltage, before the engine is started, when the oil capacity of the oil pan is normal, the oil level sensor (5) outputs 4.25-4.75V voltage, the ECM controller (2) of the engine controls the engine to be started at the moment, when the signal voltage of the oil level sensor (5) is less than or equal to 4.25V, the ECM controller (2) of the engine controls the engine not to be started, and the monitor (6) alarms through an alarm horn (7);
2) when the engine is started, in a pre-lubrication stage, the pre-lubrication motor (12) sucks the engine oil in the oil pan into a preset rotating part of an engine body, the liquid level of the engine oil is reduced, and the output voltage of a signal line of an engine oil level sensor (5) is 3.75-4.25V;
3) after the engine is started, the oil capacity of the oil pan is conveyed to the positions between all the rotating friction pairs in the engine through the oil pump and then returns to the oil pan through gravity, the oil capacity of the oil pan is reduced firstly and then is maintained in a relatively balanced state, and at the moment, the output voltage of a signal wire of an oil level sensor (5) is 1.5-3.75V;
step S2, starting pre-lubrication
1) The pre-lubrication motor control circuit is connected, a main circuit of the pre-lubrication motor (12) is connected and then works, the pre-lubrication motor (12) sucks engine oil from an oil sump into a main oil duct of an engine, an engine oil pressure switch (9) located in the main oil duct detects the engine oil pressure of the main oil duct, when P is measured and is larger than P, the engine oil pressure switch (9) is closed, a middle coil of a two-position switch (8) is electrified, a control circuit of a starting motor (13) is connected, the starting motor (13) starts to work, the engine is started, and the output voltage of a signal line of an engine oil level sensor (5) is 3.5-4.5V;
2) after the engine is started, the pre-lubrication motor and the starting motor do not work, the oil capacity of the oil pan is conveyed to all the rotating friction pairs in the engine through the oil pump and then returns to the oil pan through gravity, the oil capacity of the oil pan is reduced firstly and then is maintained in a relatively balanced state, and at the moment, the output voltage of a signal line of the oil level sensor (5) is 1.0-3.5V.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113882927A (en) * | 2021-09-30 | 2022-01-04 | 徐州徐工挖掘机械有限公司 | Real-time monitoring and maintaining system for large hydraulic excavator oil filter |
| CN114263540A (en) * | 2021-12-08 | 2022-04-01 | 潍柴动力股份有限公司 | Starting method and device of engine |
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| CN105443193A (en) * | 2014-08-11 | 2016-03-30 | 刘新羽 | Lubricating oil guarantee device of automobile engine and control method thereof |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113882927A (en) * | 2021-09-30 | 2022-01-04 | 徐州徐工挖掘机械有限公司 | Real-time monitoring and maintaining system for large hydraulic excavator oil filter |
| CN114263540A (en) * | 2021-12-08 | 2022-04-01 | 潍柴动力股份有限公司 | Starting method and device of engine |
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