CN112648041A - Engine oil initial supply control method for agricultural diesel engine - Google Patents

Engine oil initial supply control method for agricultural diesel engine Download PDF

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Publication number
CN112648041A
CN112648041A CN202011559196.XA CN202011559196A CN112648041A CN 112648041 A CN112648041 A CN 112648041A CN 202011559196 A CN202011559196 A CN 202011559196A CN 112648041 A CN112648041 A CN 112648041A
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CN
China
Prior art keywords
engine oil
engine
diesel engine
agricultural
agricultural diesel
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CN202011559196.XA
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Chinese (zh)
Inventor
李厚贵
袁玉龙
王志远
胡科全
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Suihua Institute Of Agricultural Mechanization Heilongjiang Academy Of Agricultural Mechanical Engineering
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Suihua Institute Of Agricultural Mechanization Heilongjiang Academy Of Agricultural Mechanical Engineering
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Application filed by Suihua Institute Of Agricultural Mechanization Heilongjiang Academy Of Agricultural Mechanical Engineering filed Critical Suihua Institute Of Agricultural Mechanization Heilongjiang Academy Of Agricultural Mechanical Engineering
Priority to CN202011559196.XA priority Critical patent/CN112648041A/en
Publication of CN112648041A publication Critical patent/CN112648041A/en
Pending legal-status Critical Current

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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
    • F01M1/02—Pressure lubrication using lubricating pumps
    • 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
    • F01M1/16—Controlling lubricant pressure or quantity
    • 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
    • F01M1/18—Indicating or safety devices
    • F01M1/20—Indicating or safety devices concerning lubricant pressure

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  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Lubrication Of Internal Combustion Engines (AREA)

Abstract

The invention discloses an engine oil priming control method of an agricultural diesel engine, which solves the problem of severe abrasion caused by semi-dry friction and dry friction of the agricultural diesel engine during cold start in the prior art, and is a method for controlling a set of engine oil priming devices connected in parallel in a lubricating system of the prior agricultural diesel engine, wherein a control circuit controls an engine oil priming pump relay through an ignition switch and a normally closed engine oil pressure switch so as to control the work of an engine oil priming pump; and a normally open type engine oil pressure switch is additionally arranged on the original starting circuit to control the work of the starter, and force a driver to perform initial lubrication to start the diesel engine, so that good lubrication is ensured when the agricultural diesel engine is started after being stopped. The invention is in line with the practice of agricultural machinery, has simple and effective control and can be widely applied to agricultural machinery using agricultural diesel engines.

Description

Engine oil initial supply control method for agricultural diesel engine
Technical Field
The invention belongs to the technical field of agricultural machinery, and particularly relates to a method for controlling engine oil priming of an agricultural diesel engine.
Background
At present, all agricultural diesel engines are lubricated by oil pumps driven by crankshafts, the oil pumps stop working at the same time after the agricultural diesel engines are shut down, the oil on each lubricated surface flows back to an oil pan uniformly within a certain time, a period of time is required for the oil to reach each lubricated surface of the agricultural diesel engines from the oil pumps when the agricultural diesel engines are started, each lubricated surface is in a severe abrasion state of semi-dry friction or dry friction within the period of time, and researches show that 60-80% of abrasion of the agricultural diesel engines comes from the lubricated surfaces; particularly, agricultural machinery is operated seasonally, the agricultural machinery using the agricultural diesel engine needs to be stopped for a long time when in idle, so that an inorganic oil lubricating film is not arranged on the surface of each lubricating part before restarting, and engine oil can not reach each lubricating surface of the agricultural diesel engine in time when restarting, particularly, the viscosity of the engine oil is increased and the flow is poor when starting at low temperature or freezing, so that the engine oil is in a non-lubricating or poor lubricating state when starting, the abrasion is aggravated, the damage to a crankshaft bearing bush and a turbocharger bearing of the agricultural diesel engine is the greatest, and the service life of the agricultural diesel engine and each part is greatly reduced.
Disclosure of Invention
The invention aims at the existing problems, and provides an engine oil priming control method of an agricultural diesel engine, which aims to solve the problem of severe abrasion caused by dry friction and semi-dry friction due to no lubrication or poor lubrication during cold start of the original agricultural diesel engine. In addition, if the engine oil priming pump motor works for too long, not only electric energy is wasted, but also ablation and damage are possible.
In order to solve the problems, the technical scheme of the invention is as follows:
on the basis of an original starting relay of a starting control circuit, a normally open type engine oil pressure switch is additionally arranged, before an agricultural diesel engine is started, an engine oil primary supply device is controlled to perform primary supply lubrication operation, an ignition switch is screwed to a preheating gear H, the current of the control circuit reaches an engine oil primary supply pump relay coil through the ignition switch preheating gear H and the normally closed type engine oil pressure switch by a storage battery and a fuse, a relay contact is closed, and the engine oil primary supply pump starts primary supply lubrication; only when the engine oil primary supply pressure of the agricultural diesel engine reaches a closed set value of 49kpa, the additionally arranged normally open engine oil pressure switch senses that the oil pressure is automatically closed, and a starting circuit is switched on, the starter can work, so that the aim of forcibly using an engine oil primary supply pump to perform primary supply lubrication before a driver starts is fulfilled, and the problems of no lubrication or poor lubrication in cold starting in the prior art are solved; when the engine oil primary pressure of the agricultural diesel engine continues to increase, the set value of disconnection is 98kpa, the normally closed engine oil pressure switch connected in series in the engine oil primary pump control circuit senses the automatic disconnection of the oil pressure, the relay coil of the engine oil primary pump is disconnected, the relay contact is disconnected, the engine oil primary pump stops working, and the problems that an engine oil primary pump motor is ablated and damaged due to overlong working time and wastes electric energy are solved.
And carrying out related fault diagnosis on the parts with abnormal states in the initial lubrication operation process of the engine oil initial supply device.
Compared with the prior art, the invention has the beneficial effects that: the invention provides an engine oil priming control method of an agricultural diesel engine, which accords with the actual agricultural machinery and is simple and effective to control, combines the electronic control and automation level and the current situation of domestic agricultural machinery, adopts a normally open type and normally closed type engine oil pressure switch which is convenient to operate to automatically control the on-off of a starting circuit and an engine oil priming circuit, realizes the purpose of forcing a driver to perform priming lubrication by using an engine oil priming pump before starting, solves the problem of severe abrasion caused by dry friction and semi-dry friction due to no lubrication or poor lubrication during starting of the agricultural diesel engine in the prior art, and avoids the problems of ablation damage and electric energy waste of an engine oil priming pump motor due to overlong working time.
Drawings
FIG. 1 is a schematic circuit diagram of a method for controlling initial supply of engine oil for an agricultural diesel engine according to the present invention.
FIG. 2 is a flow chart of the control of the normally open type oil pressure switch of the oil priming control method of the agricultural diesel engine provided by the invention.
FIG. 3 is a flow chart of the control of a normally closed oil pressure switch of the method for controlling the initial supply of the engine oil of the agricultural diesel engine.
FIG. 4 is a flow chart illustrating a diagnosis of a part of components with abnormal conditions during the initial lubrication operation of the engine oil according to the present invention.
In the figure, 1 designates: 1-storage battery, 2-fuse, 3-normally closed engine oil pressure switch, 4-engine oil priming pump relay, 5-engine oil priming pump, 6-engine oil pressure gauge, 7-ignition switch, 8-normally open engine oil pressure switch, 9-start relay and 10-starter.
Detailed Description
The engine oil priming device of the invention comprises: the lubricating system is characterized in that an engine oil primary supply device which takes an engine oil primary supply pump 5 as a main part is connected in parallel in an original lubricating system of the agricultural diesel engine, the engine oil primary supply pump 5 is of an electric gear type and is driven by a direct current motor through a control circuit, an oil pan, an oil filter and a related lubricating oil channel in the original lubricating system of the agricultural diesel engine are used, the oil inlet end of the engine oil primary supply pump 5 extends into the bottom of the oil pan through an oil pipe and a filter, and the oil outlet end is connected with an engine oil rough filter and a main oil channel 7 in the original lubricating system of the agricultural diesel engine through a one. The check valve is used for preventing the engine oil pumped by the engine oil pump of the agricultural diesel engine from being decompressed through a pipeline of the engine oil primary supply device after the engine oil is started.
The invention provides an engine oil priming control method of an agricultural diesel engine, wherein a control circuit is shown in figure 1, and the specific implementation mode is as follows:
and (3) controlling a normally open type engine oil pressure switch: a method for controlling the engine oil primary supply of an agricultural diesel engine is a method for controlling a set of engine oil primary supply devices which are connected in parallel in an original lubricating system of the agricultural diesel engine, and is characterized in that a normally open type engine oil pressure switch 8 is additionally arranged on the basis of an original starting relay 9 of a starting circuit, the engine oil primary supply devices are controlled to perform primary supply lubrication operation before the agricultural diesel engine is started, an ignition switch 7 is screwed to a preheating gear H, the current of a control circuit reaches a coil of an engine oil primary supply pump relay 4 through the preheating gear H of the ignition switch 7 and a normally closed type engine oil pressure switch 3, the contact of the relay 4 is closed, and the engine oil primary supply pump 5 starts primary supply lubrication; only when the initial supply pressure of the engine oil of the agricultural diesel engine reaches a closing set value of 49kpa, the normally open type engine oil pressure switch 8 which is additionally arranged senses that the oil pressure is automatically closed, a starting circuit is switched on, and the starter 10 can work. The operation of the normally open type oil pressure switch 8 is mainly involved, and the control flow of the normally open type oil pressure switch 8 is shown in fig. 2, and the specific steps are as follows:
s101, the step is a preparation working phase, firstly, whether the storage battery 1 is enough in charge and whether the fuse 2 is good are checked, if the two are not in question, the step S102 is executed.
S102, the ignition switch is screwed to a preheating gear H, and current from the storage battery 1 and the fuse 2 sequentially passes through the ignition switch 7, the normally closed type engine oil pressure switch 3 and a coil of the engine oil primary pump relay 4; if the above parts are normal, the coil circuit of the relay 4 is switched on, and the contact of the relay 4 is closed; if the contact of the engine oil priming pump relay 4 is good, the engine oil priming pump 5 starts to work to perform priming lubrication.
S103, confirming whether the primary engine oil supply pressure reaches 49kpa through the engine oil pressure gauge 6, keeping the normally open type engine oil pressure switch 8 in an off state when the primary engine oil supply pressure of the agricultural diesel engine does not reach 49kpa, keeping the ignition switch 7 at the position of a preheating gear H when the normally open type engine oil pressure switch 8 cannot be started, and continuing to execute the step S102; when the oil priming pressure reaches 49kpa, step S104 is executed.
S104, when the engine oil initial supply pressure of the agricultural diesel engine reaches 49kpa, the ignition switch 7 is screwed to the starting gear ST at the moment, and the currents from the storage battery 1 and the fuse 2 sequentially pass through the ignition switch 7, the coil of the starting relay 9 and the normally open type engine oil pressure switch 8 to check whether the parts are good or not; if so, step S105 is performed.
S105, if the above-mentioned portions are good in step S104, the coil circuit of the starter relay 9 is turned on, and the contact of the starter relay 9 is closed; if the contact of the starter relay 9 is good, the current from the battery 1 and the fuse 2 reaches the starter through the contact of the starter relay 9, and the starter can be started.
And (3) controlling a normally closed engine oil pressure switch:
when the engine oil priming pressure of the agricultural diesel engine continues to increase and reaches a disconnection set value of 98kpa, the normally closed engine oil pressure switch 3 connected in series in the control circuit of the engine oil priming pump 5 senses that the oil pressure is automatically disconnected, the coil of the engine oil priming pump relay 4 is powered off, the contact of the engine oil priming pump relay 4 is disconnected, and the engine oil priming pump 5 stops working. What is involved here is mainly the work of normal close formula oil pressure switch 3, and the control flow of normal close formula oil pressure switch 3 is as shown in fig. 3, and the concrete step is as follows:
s201, step S101 is synchronized.
S202, a synchronization step S102.
S203, confirming whether the primary engine oil supply pressure reaches 98kpa through the engine oil pressure gauge 6, keeping the normally closed engine oil pressure switch 3 in a closed state when the primary engine oil supply pressure of the agricultural diesel engine does not reach 98kpa, continuing to work the primary engine oil supply pump 5 if the ignition switch 7 is in a preheating gear H gear, and continuing to execute the step S202; when the oil priming pressure reaches 98kpa, step S204 is executed.
And S204, when the engine oil priming pressure of the agricultural diesel engine reaches 98kpa, the normally closed engine oil pressure switch 3 senses that the oil pressure is automatically switched off, the coil of the engine oil priming pump relay 4 is powered off, the contact of the engine oil priming pump relay 4 is switched off, and the engine oil priming pump 5 stops working.
Diagnosing part of parts with abnormal states in the initial lubrication process of the engine oil:
and carrying out related fault diagnosis on the parts with abnormal states in the initial lubrication operation process of the engine oil initial supply device. The present embodiment mainly describes a fault diagnosis method for the oil priming pump 5 and the normally open oil pressure switch 8, and the flowchart is shown in fig. 4, and the specific steps are as follows:
s301, firstly checking whether the electric quantity of the storage battery 1 is sufficient, and checking whether the starter 10 and the starting control circuit are normal; if there is no problem, the process proceeds to step S302.
S302, screwing the ignition switch 7 to a preheating gear H, and confirming whether the initial supply pressure of the engine oil reaches 49 kpa; if the engine oil priming pressure of the agricultural diesel engine reaches 49kpa, the flow proceeds to step S303.
S303, turning the ignition switch 7 to a starting gear ST, and confirming whether the starting can be carried out or not; if not, the process proceeds to step S304.
S304, verifying whether the displayed value of the oil pressure gauge 6 is accurate by using an oil pressure direct-sensing meter; if accurate, the process proceeds to step S305.
S305, determining that the normally open type oil pressure switch 8 or a related pipeline works abnormally according to the steps; if the engine oil priming pressure of the agricultural diesel engine does not reach 49kpa, the flow proceeds to step S306.
S306, keeping the ignition switch 7 at the position of the preheating gear H for 1-2 minutes, enabling the engine oil priming pump to continue working, and determining whether the engine oil priming pressure reaches 49 kpa; if 49kpa is not reached, the process proceeds to step S307.
Step S307, an engine oil pressure direct-sensing meter can be used for verifying whether the displayed value of the engine oil pressure gauge 6 is accurate or not; if accurate, the process proceeds to step S308.
And step S308, determining that the engine oil primary pump 5 or the related circuit works abnormally according to the steps.
The invention provides an engine oil priming control method of an agricultural diesel engine, which accords with the actual agricultural machinery and is simple and effective to control, combines the electronic control and automation level and the current situation of domestic agricultural machinery, adopts a normally open type engine oil pressure switch 8 and a normally closed type engine oil pressure switch 3 which are convenient to operate to automatically control the on-off of a starting circuit and an engine oil priming circuit, realizes the purpose of forcing a driver to perform priming lubrication by using an engine oil priming pump 5 before starting, solves the problem of severe abrasion caused by dry friction and semi-dry friction due to no lubrication or poor lubrication during starting of the agricultural diesel engine in the prior art, and avoids the problems of ablation damage and electric energy waste of a motor of the engine oil priming pump 5 due to overlong working time.
The above description is only a few embodiments of the present invention, and is not intended to limit the present invention, and any modifications and improvements made within the spirit of the present invention should be included in the protection scope of the present invention.

Claims (3)

1. A method for controlling the engine oil priming of an agricultural diesel engine is a method for controlling a set of engine oil priming devices which are connected in parallel in the original lubricating system of the agricultural diesel engine, and is characterized in that: the starting control circuit is additionally provided with a normally open type engine oil pressure switch (8) on the basis of an original starting relay (9), before the agricultural diesel engine is started, the engine oil primary device is controlled to perform primary lubrication operation, an ignition switch (7) is screwed to a preheating gear H, the current of the control circuit reaches a coil of an engine oil primary pump relay (4) through a storage battery (1) and a fuse (2) through the preheating gear H of the ignition switch (7) and a normally closed type engine oil pressure switch (3), the contact of the relay (4) is closed, and the engine oil primary pump (5) starts primary lubrication; only when the initial supply pressure of the engine oil of the agricultural diesel engine reaches a closing set value of 49kpa, the normally open type engine oil pressure switch (8) additionally arranged senses that the oil pressure is automatically closed, a starting circuit is switched on, and the starter (10) can work.
2. The method for controlling the initial supply of the engine oil of the agricultural diesel engine as claimed in claim 1, wherein the initial supply pressure of the engine oil of the agricultural diesel engine is continuously increased, when the set value of the cut-off value is 98kpa, the normally closed type engine oil pressure switch (3) connected in series in the control circuit of the engine oil initial supply pump (5) senses the automatic cut-off of the oil pressure, the coil of the relay (4) of the engine oil initial supply pump is powered off, the contact of the relay (4) is cut off, and the engine oil initial supply pump (5) stops working.
3. The method for controlling the initial supply of the engine oil to the agricultural diesel engine as set forth in claim 1, wherein the relevant fault diagnosis is performed for the parts with abnormal state during the initial supply lubricating operation of the initial supply device.
CN202011559196.XA 2020-12-25 2020-12-25 Engine oil initial supply control method for agricultural diesel engine Pending CN112648041A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011559196.XA CN112648041A (en) 2020-12-25 2020-12-25 Engine oil initial supply control method for agricultural diesel engine

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011559196.XA CN112648041A (en) 2020-12-25 2020-12-25 Engine oil initial supply control method for agricultural diesel engine

Publications (1)

Publication Number Publication Date
CN112648041A true CN112648041A (en) 2021-04-13

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Family Applications (1)

Application Number Title Priority Date Filing Date
CN202011559196.XA Pending CN112648041A (en) 2020-12-25 2020-12-25 Engine oil initial supply control method for agricultural diesel engine

Country Status (1)

Country Link
CN (1) CN112648041A (en)

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