CN106703991B - A kind of engine protection device and method - Google Patents
A kind of engine protection device and method Download PDFInfo
- Publication number
- CN106703991B CN106703991B CN201611106188.3A CN201611106188A CN106703991B CN 106703991 B CN106703991 B CN 106703991B CN 201611106188 A CN201611106188 A CN 201611106188A CN 106703991 B CN106703991 B CN 106703991B
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- pinking
- sliding block
- pressure
- engine
- detonation
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02B—INTERNAL-COMBUSTION PISTON ENGINES; COMBUSTION ENGINES IN GENERAL
- F02B77/00—Component parts, details or accessories, not otherwise provided for
- F02B77/08—Safety, indicating, or supervising devices
- F02B77/085—Safety, indicating, or supervising devices with sensors measuring combustion processes, e.g. knocking, pressure, ionization, combustion flame
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- Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Combined Controls Of Internal Combustion Engines (AREA)
Abstract
The present invention provides a kind of engine protection device and method; for inhibiting combustion knock bring to influence, pinking can be monitored and inhibited under different operating conditions, when detonation sensor detects that pinking occurs; change plunger shaft volume, reduces the pressure and temperature of combustion chamber；Designing sliding block spring pretightning force simultaneously is the corresponding shoe surface stress of highest detonation pressure, when detonation pressure transfinites, overcomes initial tension of spring, increases plunger shaft volume, and the bring that inhibition detonation pressure transfinites endangers.It additionally by certain Diagnostic Strategy, transfinites after reaching a certain level in pinking or cylinder pressure, breakdown judge is carried out to reason, and then carry out failed storage, illuminating state indicator light, the measures such as system degradation, and remind driver to carry out engine maintenance in time.
Description
Technical field
The present invention relates to field of engine combustion, in particular to a kind of device and method for improving engine reliability.
Background technique
With the raising of cost-effectiveness requirement, the compression ratio needs of engine are correspondinglyd increase, but the increased risk of pinking therewith.
Pinking refers to certain part gaseous mixture abnormal combustion caused by spontaneous combustion before the arrival of normal combustion flame front in engine cylinder
Phenomenon.In practical application, following situations can lead to pinking: excessive carbon deposit (excessively high machine oil ash content)；Consumption of lubricating oil is excessive, hair
The burning of motivation overrich；It is more than 5% that fuel, which is richer than set point,；Intercooler pollutes (excessively high intake air temperature)；Pressurization not can control or mistake
It is high；Ignition timing is inaccurate；Fuel quality is poor (low octane rating).As it can be seen that the probability that pinking occurs is also with the variation of applying working condition
It is higher.After pinking occurs, engine power performance, economy will sharply deteriorate, and engine life greatly reduces, strong when occurring
When strong pinking, the engine components such as piston may cause permanent damage.For this purpose, being examined based on reliability requirement and economy synthesis
Consider, under the premise of not influencing dynamic property (needing certain light knock retention property), severe knock is inhibited to generate, reduces strong
The loss of reliability brought by strong pinking is the technical problem that those skilled in the art need to overcome and solve.
Summary of the invention
In order to solve the above problem in the prior art, the present invention proposes a kind of engine protection device and method, passes through
The device and method can inhibit combustion knock, improve engine reliability.
The protective device of an object of the present invention is achieved through the following technical solutions:
A kind of engine protection device, described device is arranged on cylinder cap, including the pressure channel with combustion chamber,
Slide block chamber is provided in pressure channel, slide block chamber is equipped with sliding block and sliding block control mechanism,
Sliding block control mechanism includes: the spring for being mounted on slider back side；It is mounted on the subsequent plug screw of spring, plug screw is screwed in cylinder
It covers；With the rigidly connected rack gear of sliding block；External motor is set, and rack gear passes through plug screw and is connected with the motor, on cylinder cap also
Equipped with the sensor passage being connected to pressure channel, sensor passage one end is connected with detonation sensor.
Further, when motor is not powered, rack gear is able to drive under the pressure effect of sliding block in the combustion chamber and is moved freely.
Further, sliding block spring Prestress design is that engine highest designs shoe surface stress corresponding to detonation pressure.
The guard method using above-mentioned protective device of the second object of the present invention is achieved through the following technical solutions:
A kind of engine guard method using aforementioned engine protection device, which comprises
1) set sliding block spring pretightning force, make it equal to be designed according to engine highest the corresponding shoe surface of detonation pressure by
Power；
2) recognition detection is carried out to phenomenon of detonation using detonation sensor；
3) when determining generation pinking, the slider displacement needed for inhibiting pinking to influence is calculated by the degree of strength of pinking,
The displacement is executed by motor band carry-over bar；Ignition advance angle is delayed into processing simultaneously；
4) when in-cylinder pressure is more than highest design detonation pressure, sliding block overcomes initial tension of spring mobile, further increases sliding block
Chamber volume, to reduce indoor pressure of burning.
Further, above-mentioned steps 4) after further include:
5) pinking number and/or pinking duration lower limit value and upper limit value are set, with fault diagnosis module (DSM module) to quick-fried
Shake repeats to detect, if pinking number and/or pinking duration are lower than lower limit value, keeps current operating condition；If pinking number and/or
Pinking duration is higher than lower limit value and is lower than upper limit value, and fault diagnosis module notifies actuator to adjust ignition advance angle, and to burning
Gaseous mixture is controlled；If pinking number and/or pinking duration are higher than upper limit value, need to carry out parking checking or dimension to failure
It repairs.
The present invention has the advantages that
1, it monitors pinking in real time and carries out adjustment combustion chamber volume in real time, inhibit pinking to generate, reducing pinking influences.
2, inhibit explosion pressure to transfinite, improve engine reliability.
3, structure is simple, small to cylinder cover structure change, and control mode is easy to accomplish, at low cost, significant effect.
Detailed description of the invention
By reading the following detailed description of the preferred embodiment, various other advantages and benefits are common for this field
Technical staff will become clear.The drawings are only for the purpose of illustrating a preferred embodiment, and is not considered as to the present invention
Limitation.And throughout the drawings, the same reference numbers will be used to refer to the same parts.In the accompanying drawings:
Attached drawing 1 shows the structural schematic diagram of the protective device of embodiment according to the present invention.
Attached drawing 2 shows the control flow chart of the guard method of embodiment according to the present invention.
Specific embodiment
The illustrative embodiments of the disclosure are more fully described below with reference to accompanying drawings.Although showing this public affairs in attached drawing
The illustrative embodiments opened, it being understood, however, that may be realized in various forms the disclosure without the reality that should be illustrated here
The mode of applying is limited.It is to be able to thoroughly understand the disclosure on the contrary, providing these embodiments, and can be by this public affairs
The range opened is fully disclosed to those skilled in the art.
Embodiment according to the present invention proposes a kind of engine protection device, as shown in Figure 1, described device setting exists
On cylinder cap 10, including the pressure channel 1 with combustion chamber, slide block chamber 4 is provided in pressure channel, slide block chamber 4 is equipped with
Sliding block and sliding block control mechanism, sliding block control mechanism include: the spring 3 for being mounted on 2 back side of sliding block；It is subsequent to be mounted on spring 3
Plug screw 7, plug screw 7 are screwed on cylinder cap 10；With the rigidly connected rack gear 6 of sliding block 2；External motor 5 is set, and rack gear 6 passes through spiral shell
Plug 7 is connected with the motor, and the sensor passage 8 being connected to pressure channel 1 is additionally provided on cylinder cap 10, and 8 one end of sensor passage connects
It is connected to detonation sensor 9.When motor is not powered, sliding block can be able to drive rack gear freedom under pressure effect in the combustion chamber
It is mobile.Sliding block spring Prestress design is that engine highest designs shoe surface stress corresponding to detonation pressure.
With reference to Fig. 2, the guard method using above-mentioned protective device includes:
1) set sliding block spring pretightning force, make it equal to be designed according to engine highest the corresponding shoe surface of detonation pressure by
Power；
2) recognition detection is carried out to phenomenon of detonation using detonation sensor；
3) when determining generation pinking, the slider displacement needed for inhibiting pinking to influence is calculated by the degree of strength of pinking,
The displacement is executed by motor band carry-over bar；Ignition advance angle is delayed into processing simultaneously；
4) when in-cylinder pressure is more than highest design detonation pressure, sliding block overcomes initial tension of spring mobile, further increases sliding block
Chamber volume, to reduce indoor pressure of burning.
5) pinking number and/or pinking duration lower limit value and upper limit value are set, with fault diagnosis module (DSM module) to quick-fried
Shake repeats to detect, if pinking number and/or pinking duration are lower than lower limit value, keeps current operating condition；If pinking number and/or
Pinking duration is higher than lower limit value and is lower than upper limit value, and fault diagnosis module notifies actuator to adjust ignition advance angle, and to burning
Gaseous mixture is controlled；If pinking number and/or pinking duration are higher than upper limit value, need to carry out parking checking or dimension to failure
It repairs.
The engine protection device and corresponding method that the present invention develops utilize sliding block precision control mechanism, for inhibiting hair
Engine knock bring influences, and pinking can be monitored and inhibited under different operating conditions, when detonation sensor detects pinking
When, slider displacement is calculated according to knock intensity, so that motor drag rack gear executes, sliding block is moved to left, and increases slide block chamber volume, is reduced
The pressure and temperature of combustion chamber；Simultaneously because sliding block spring Prestress design is that engine highest designs corresponding to detonation pressure
Shoe surface stress overcomes initial tension of spring to further increase slide block chamber volume when explosion pressure transfinites, and reduces combustion chamber
Interior pressure, the bring that inhibition detonation pressure transfinites endangers, and reduces thus bring risk.Additionally by certain Diagnostic Strategy,
After pinking or detonation pressure are transfinited and reached a certain level, breakdown judge is carried out to reason, and then carry out failed storage, illuminating state refers to
Show lamp, the measures such as system degradation, and reminds driver to carry out engine maintenance in time.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with the protection model of the claim
Subject to enclosing.
Claims (5)
1. a kind of engine guard method, which is characterized in that the engine guard method is carried out using engine protection device,
The engine protection device is arranged on cylinder cap (10), including the pressure channel (1) with combustion chamber, in pressure channel
It being provided with slide block chamber (4), slide block chamber (4) is equipped with sliding block and sliding block control mechanism,
Sliding block control mechanism includes: the spring (3) for being mounted on sliding block (2) back side；It is mounted on spring (3) subsequent plug screw (7), spiral shell
Plug (7) is screwed on cylinder cap (10)；With sliding block (2) rigidly connected rack gear (6)；External motor (5) is set, and rack gear (6) is worn
Plug screw (7) is crossed to be connected with the motor,
The sensor passage (8) being connected to pressure channel (1) is additionally provided on cylinder cap (10), sensor passage (8) one end is connected with
Detonation sensor (9)；The described method includes:
1) sliding block spring pretightning force is set, makes it equal to design the corresponding shoe surface stress of detonation pressure according to engine highest；
2) recognition detection is carried out to phenomenon of detonation using detonation sensor；
3) when determining generation pinking, the slider displacement needed for inhibiting pinking to influence is calculated by the degree of strength of pinking, is passed through
Motor band carry-over bar executes the displacement；Ignition advance angle is delayed into processing simultaneously；
4) when in-cylinder pressure is more than highest design detonation pressure, sliding block overcomes initial tension of spring mobile, further increases slide block chamber appearance
Product, to reduce indoor pressure of burning.
2. engine guard method as described in claim 1, which is characterized in that above-mentioned steps 4) after further include:
5) pinking number and/or pinking duration lower limit value and upper limit value are set, pinking is repeated to detect with fault diagnosis module, if
Pinking number and/or pinking duration are lower than lower limit value, keep current operating condition；If pinking number and/or pinking duration are higher than
Lower limit value and be lower than upper limit value, fault diagnosis module notifies actuator to adjust ignition advance angle, and controls to combustion mixture
System；If pinking number and/or pinking duration are higher than upper limit value, need to carry out parking checking or maintenance to failure.
3. engine guard method as claimed in claim 1 or 2, which is characterized in that when motor is not powered, sliding block (2) exists
Rack gear (6) is able to drive under the indoor pressure of burning effect to move freely.
4. engine guard method as claimed in claim 1 or 2, which is characterized in that the Prestress design of the spring (3) is
Engine highest designs shoe surface stress corresponding to detonation pressure.
5. a kind of cylinder head, which is characterized in that the cylinder head at least uses hair according to any one of claims 1-4
Motivation guard method is protected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611106188.3A CN106703991B (en) | 2016-12-05 | 2016-12-05 | A kind of engine protection device and method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201611106188.3A CN106703991B (en) | 2016-12-05 | 2016-12-05 | A kind of engine protection device and method |
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| Publication Number | Publication Date |
|---|---|
| CN106703991A CN106703991A (en) | 2017-05-24 |
| CN106703991B true CN106703991B (en) | 2019-03-29 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201611106188.3A Active CN106703991B (en) | 2016-12-05 | 2016-12-05 | A kind of engine protection device and method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049680U (en) * | 1989-05-04 | 1989-12-20 | 刘安民 | Internal combustion type engine |
| CN1322295A (en) * | 1999-09-28 | 2001-11-14 | 罗伯特·博施有限公司 | Method for detecting knocking |
| CN1542425A (en) * | 2003-04-01 | 2004-11-03 | 本田技研工业株式会社 | Installation structure of knockmeter in internal combustion engine |
| CN1683911A (en) * | 2004-04-16 | 2005-10-19 | 丰田自动车株式会社 | Knock judging device and knock judging method for internal combustion engine |
| CN104343573A (en) * | 2013-07-24 | 2015-02-11 | 梁天宇 | Slidable cylinder cover type variable compression ratio engine |
-
2016
- 2016-12-05 CN CN201611106188.3A patent/CN106703991B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2049680U (en) * | 1989-05-04 | 1989-12-20 | 刘安民 | Internal combustion type engine |
| CN1322295A (en) * | 1999-09-28 | 2001-11-14 | 罗伯特·博施有限公司 | Method for detecting knocking |
| CN1542425A (en) * | 2003-04-01 | 2004-11-03 | 本田技研工业株式会社 | Installation structure of knockmeter in internal combustion engine |
| CN1683911A (en) * | 2004-04-16 | 2005-10-19 | 丰田自动车株式会社 | Knock judging device and knock judging method for internal combustion engine |
| CN104343573A (en) * | 2013-07-24 | 2015-02-11 | 梁天宇 | Slidable cylinder cover type variable compression ratio engine |
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| Publication number | Publication date |
|---|---|
| CN106703991A (en) | 2017-05-24 |
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