CN113153479A - Auxiliary braking device in engine cylinder, braking method and road roller - Google Patents
Auxiliary braking device in engine cylinder, braking method and road roller Download PDFInfo
- Publication number
- CN113153479A CN113153479A CN202110554707.7A CN202110554707A CN113153479A CN 113153479 A CN113153479 A CN 113153479A CN 202110554707 A CN202110554707 A CN 202110554707A CN 113153479 A CN113153479 A CN 113153479A
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- Prior art keywords
- piston
- cylinder
- exhaust
- valve
- electromagnet
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/06—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for braking
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- E—FIXED CONSTRUCTIONS
- E01—CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES
- E01C—CONSTRUCTION OF, OR SURFACES FOR, ROADS, SPORTS GROUNDS, OR THE LIKE; MACHINES OR AUXILIARY TOOLS FOR CONSTRUCTION OR REPAIR
- E01C19/00—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving
- E01C19/22—Machines, tools or auxiliary devices for preparing or distributing paving materials, for working the placed materials, or for forming, consolidating, or finishing the paving for consolidating or finishing laid-down unset materials
- E01C19/23—Rollers therefor; Such rollers usable also for compacting soil
- E01C19/26—Rollers therefor; Such rollers usable also for compacting soil self-propelled or fitted to road vehicles
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/0242—Variable control of the exhaust valves only
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F02—COMBUSTION ENGINES; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS
- F02D—CONTROLLING COMBUSTION ENGINES
- F02D13/00—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing
- F02D13/02—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation
- F02D13/04—Controlling the engine output power by varying inlet or exhaust valve operating characteristics, e.g. timing during engine operation using engine as brake
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Valve Device For Special Equipments (AREA)
- Output Control And Ontrol Of Special Type Engine (AREA)
Abstract
The invention discloses an auxiliary braking device in an engine cylinder, a braking method and a road roller, wherein the device comprises a pressing plate, a two-way electromagnet and a piston arranged in a piston cylinder, the top end of the piston cylinder is provided with an inlet valve and an exhaust valve, and an exhaust channel where the exhaust valve is arranged is provided with an exhaust stop valve; the bidirectional electromagnet is connected to the bottom surface of the pressing plate, the output end of the bidirectional electromagnet is connected with a stop block, the bidirectional electromagnet is used for controlling the stop block to be located at a first position or a second position, and in the first position, the stop block extends out to block the rocker arm from returning to open the exhaust valve; in the second position, the stop block retracts, and the rocker arm returns to enable the exhaust valve to be closed; the braking in the cylinder can be well realized, the braking pressure of a drive axle is reduced, and the safe driving performance of the road roller is improved; and the structure is simple and reliable, and measures such as engine oil pressure and the like are not needed.
Description
Technical Field
The invention relates to the technical field of road rollers, in particular to an auxiliary braking device in an engine cylinder, a braking method and a road roller.
Background
At present, most road rollers adopt a drive axle to realize complete machine braking, and the safety of the road rollers on a normal running road is higher. However, in some special construction sites such as long slope construction in mountainous areas, continuous braking is often performed based on safety considerations. Because the complete machine quality is heavier, and inertia is great, continuous braking makes the stopper appear high temperature, and the braking effect descends, and the security of driving is threatened seriously, awaits urgent need to promote the braking performance of mountain area long slope operation down.
Disclosure of Invention
The invention aims to provide an auxiliary braking device in an engine cylinder, a braking method and a road roller, and aims to solve the problems of high braking pressure and poor safe driving performance of a road roller driving axle in the prior art.
In order to achieve the purpose, the invention is realized by adopting the following technical scheme:
an auxiliary braking device in an engine cylinder comprises a pressing plate, a bidirectional electromagnet and a piston arranged in the piston cylinder, wherein an inlet valve and an exhaust valve are arranged at the top end of the piston cylinder, and an exhaust stop valve is arranged on an exhaust passage where the exhaust valve is located;
the bidirectional electromagnet is connected to the bottom surface of the pressing plate, the output end of the bidirectional electromagnet is connected with a stop block, the bidirectional electromagnet is used for controlling the stop block to be located at a first position or a second position, and in the first position, the stop block extends out to block the rocker arm from returning to enable the exhaust valve to be opened; in the second position, the stop block retracts, and the rocker arm returns to enable the exhaust valve to be closed;
the bi-directional electromagnet is configured to move the stopper to a first position to allow gas to enter the exhaust passage when the piston first travels upward to compress air;
the two-way electromagnet is configured to move the stop to the first position when the piston moves up to compress air again so that the gas in the exhaust passage acts against the piston to achieve piston-cylinder auxiliary braking.
Further, the bidirectional electromagnet is in signal connection with a controller, and the controller is configured to enable the bidirectional electromagnet to work so that the stop block is located at the first position or the second position.
Further, the controller is in signal connection with the exhaust stop valve, and the controller is configured to close the exhaust stop valve when the piston compresses air for the first time in an upward direction.
Furthermore, a binding post is connected to the pressing plate and used for supplying power to the bidirectional electromagnet.
Further, the wiring terminal and the controller are both connected with an external power supply.
Further, the bidirectional electromagnet is connected to the bottom surface of the pressing plate through a fastening bolt.
The invention also discloses a braking method of the engine cylinder auxiliary braking device according to any one of the above, which comprises the following steps:
opening the inlet valve, and descending the piston to enable gas to enter a piston cylinder;
closing the inlet valve, enabling the piston to compress air for the first time in an upward mode, and enabling the stop block to move to the first position to enable gas to enter the exhaust passage;
opening the inlet valve, and descending the piston to enable gas to enter a piston cylinder;
and closing the inlet valve, enabling the piston to ascend again to compress air, and enabling the stop block to move to the first position so that the gas in the exhaust passage acts against the piston to realize auxiliary braking in the piston cylinder.
The invention also discloses a road roller which comprises the engine cylinder auxiliary braking device.
According to the technical scheme, the embodiment of the invention at least has the following effects:
1. according to the braking device designed by the application, the stop block is driven to be located at the first position and the second position through the two-way electromagnet, when gas is compressed, the rocker arm can be stopped from returning, so that the gas enters the exhaust passage, the gas gathered in the exhaust passage can react with the piston when the exhaust valve is opened, auxiliary braking in the piston cylinder is completed, in-cylinder braking is well realized, the braking pressure of a drive axle is reduced, and the safe driving performance of the road roller is improved; the structure is simple and reliable, and measures such as engine oil pressure and the like are not needed;
2. through controller control exhaust stop valve and two-way electromagnet, opening and closing through two-way electromagnet can effectual control exhaust valve, can control opening and closing of exhaust passage through the exhaust stop valve, effectual realization gas compression and counteraction in the piston cylinder in the exhaust passage, simple structure, control is convenient.
Drawings
Fig. 1 is a schematic structural view of an auxiliary braking device according to an embodiment of the present invention.
Wherein: 1. a binding post; 2. pressing a plate; 3. fastening a bolt; 4. a bidirectional electromagnet; 5. a rocker arm; 6. an exhaust valve; 7. an exhaust passage; 8. an exhaust shut-off valve; 9. a controller; 10. a piston; 11. a connecting rod; 12. a stopper; 13. an intake valve; 14. an air inlet channel.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
It should be noted that in the description of the present invention, the terms "front", "rear", "left", "right", "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present invention but do not require that the present invention must be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. As used in the description of the present invention, the terms "front," "back," "left," "right," "up," "down" and "in" refer to directions in the drawings, and the terms "inner" and "outer" refer to directions toward and away from, respectively, the geometric center of a particular component.
Example 1
The invention designs a novel auxiliary braking device in an engine cylinder, aiming at the problem that the braking requirement of a road roller during construction of a long slope can not be met only by braking by a drive axle at present. The device adopts measures such as opening of the exhaust valve and blocking of the exhaust valve during air compression, so that the engine does not do work and absorbs external power, the auxiliary braking in the cylinder of the engine is realized, the braking pressure of the drive axle is reduced, and the safe driving performance of the road roller is improved.
As shown in figure 1, the invention discloses an auxiliary braking device in an engine cylinder, which comprises a pressure plate 2, a two-way electromagnet 4 and a piston 10 arranged in the piston cylinder, wherein the top end of the piston cylinder is provided with an inlet valve 13 and an exhaust valve 6, and an exhaust stop valve 8 is arranged on an exhaust passage 7 where the exhaust valve 6 is positioned; the bidirectional electromagnet 4 is connected to the bottom surface of the pressing plate 2, the output end of the bidirectional electromagnet 4 is connected with a stop block 12, the bidirectional electromagnet 4 is used for controlling the stop block 12 to be located at a first position or a second position, and in the first position, the stop block 12 extends out to block the rocker arm 5 from returning to enable the exhaust valve 6 to be opened; in the second position, the stop 12 is retracted and the rocker arm 5 is returned to close the exhaust valve 6; the two-way electromagnet is configured to move the stop 12 to the first position to let the gas enter the exhaust channel 7 when the piston 10 is going up to compress the air for the first time; the electromagnet is configured to move the stop to the first position when the piston 10 is again moving up the compressed air so that the gas in the exhaust passage 7 reacts against the piston 10 to effect the in-cylinder supplementary braking.
According to the braking device designed by the application, the stop block is driven to be located at the first position and the second position through the two-way electromagnet, when gas is compressed, the rocker arm can be stopped from returning, so that the gas enters the exhaust passage, the gas gathered in the exhaust passage can react with the piston when the exhaust valve is opened, auxiliary braking in the piston cylinder is completed, in-cylinder braking is well realized, the braking pressure of a drive axle is reduced, and the safe driving performance of the road roller is improved; and the structure is simple and reliable, and measures such as engine oil pressure and the like are not needed.
The two-way electromagnet 4 is fixed on the pressing plate 2 by a fastening bolt 3, and is connected with an external controller 9 through a binding post 1 on the pressing plate 2 to control the power supply. When the connecting rod 11 drives the piston 10 to move upwards to compress the mixed gas in the cylinder, the controller 9 energizes the two-way electromagnet 4, the movable iron core of the energized two-way electromagnet 4 is electrified, the movable iron core extends out of the stop block 12 and is arranged between the rocker arm 5 of the exhaust valve 6 and the pressure plate 2, the exhaust valve 6 is enabled to be in a state of being incapable of being closed, and the mixed gas in the cylinder enters the exhaust passage 7. At the moment, the mixed gas in the cylinder cannot burn to do work, the piston 10 rotates with the crankshaft to downwards suck air, the inlet valve 13 is opened, and fresh air enters the cylinder through the air inlet passage 14. When the piston 10 moves upwards again, the inlet valve 13 is closed, and the crankshaft external force needs to be absorbed to drive the crankshaft to move upwards again through the connecting rod 11 to compress air; meanwhile, the exhaust valve 6 opens the exhaust gas, the exhaust gas is closed by a signal sent to the exhaust stop valve 8 by the controller 9, the gas can be repeatedly compressed in the exhaust passage 7, the pressure is increased, the opening gap of the exhaust valve 6 reacts on the piston 10, the piston 10 descends and counteracts the ascending force transmitted by the connecting rod 11, and the anti-drag cylinder internal braking of the engine is realized. The downward sliding force of the road roller on a long slope is offset or reduced by driving the crankshaft of the engine to rotate in a reverse dragging mode, and the brake pressure of the drive axle is reduced.
In the application, in the process of realizing the piston cylinder auxiliary braking by the compressed air after the piston 10 ascends again, the number of times of the piston ascending is not limited, and the piston ascending can be carried out for the second time or the third time. The more the ascending times, the stronger the air compression effect in the exhaust passage 7.
In some embodiments, the intake valve 13 is in communication with the intake port 14, and the intake valve 13 opens and closes to allow air to enter the cylinder through the intake port 14. Similarly, the exhaust valve 6 is communicated with the exhaust passage 7, and the exhaust valve 6 is opened and closed to exhaust gas in the piston cylinder through the exhaust passage 7.
The rocker arm 5 is of the prior art and its normal return enables the exhaust valve 6 to close, which is not described in detail in this application. The utility model provides a two-way electromagnet is connected with dog 12 on it, and dog 12 stretches out, can hinder the normal return of rocking arm, makes exhaust valve 6 be in the open mode, and the dog withdrawal, rocking arm 5 can normally return, and exhaust valve 6 can close.
Example 2
The invention provides an auxiliary braking method in an engine cylinder, which is based on the auxiliary braking device in embodiment 1 and specifically comprises the following steps:
step 1, opening an inlet valve 13, and moving a piston 10 downwards to enable gas to enter a piston cylinder;
step 3, opening an inlet valve 13, and moving a piston 10 downwards to enable gas to enter a piston cylinder;
and 4, closing the inlet valve 13, enabling the piston 10 to ascend again to compress air, and enabling the stop block to move to the first position so that the gas in the exhaust passage 7 reacts on the piston 10 to realize auxiliary braking in the piston cylinder.
In this embodiment, in the process that the piston 10 moves upward again to compress air to realize the piston-cylinder auxiliary braking in step 4, the number of times of the piston moving upward is not limited, and the piston moving upward may be a second time of moving upward, or a third time of moving upward. The more the ascending times, the stronger the air compression effect in the exhaust passage 7.
Example 3
The invention also provides a road roller employing the auxiliary braking device of embodiment 1, the road roller having the following features: the downward sliding force on a long slope is offset or reduced by driving the crankshaft of the engine to rotate in a reverse dragging mode, so that the braking pressure of the drive axle is reduced, and the braking performance is improved.
It will be appreciated by those skilled in the art that the invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The embodiments disclosed above are therefore to be considered in all respects as illustrative and not restrictive. All changes which come within the scope of or equivalence to the invention are intended to be embraced therein.
Claims (8)
1. An auxiliary braking device in an engine cylinder is characterized by comprising a pressing plate (2), a bidirectional electromagnet (4) and a piston (10) arranged in the piston cylinder, wherein the top end of the piston cylinder is provided with an inlet valve (13) and an exhaust valve (6), and an exhaust stop valve (8) is arranged on an exhaust passage (7) where the exhaust valve (6) is located;
the bidirectional electromagnet (4) is connected to the bottom surface of the pressing plate (2), the output end of the bidirectional electromagnet (4) is connected with a stop block (12), the bidirectional electromagnet (4) is used for controlling the stop block (12) to be located at a first position or a second position, and in the first position, the stop block (12) extends out to block the rocker arm (5) from returning to enable the exhaust valve (6) to be opened; in the second position, the stop (12) is retracted and the rocker arm (5) is returned to close the exhaust valve (6);
the electromagnet is configured to move the stop (12) to a first position to allow gas to enter the exhaust channel (7) when the piston (10) is first moved up to compress air;
the two-way electromagnet is configured to move the stop to the first position when the piston (10) moves upwards again to compress air so that the gas in the exhaust passage (7) reacts on the piston (10) to realize the auxiliary braking in the piston cylinder.
2. The in-cylinder auxiliary brake apparatus for an engine according to claim 1, further comprising a controller (9), wherein the controller (9) is in signal connection with the bidirectional electromagnet (4), and wherein the controller (9) is configured to operate the bidirectional electromagnet (4) to place the stopper (12) in the first position or the second position.
3. The in-cylinder auxiliary brake device of an engine according to claim 2, characterized in that the controller (9) and the exhaust cut valve (8) are in signal connection, the controller (9) being configured to cause the exhaust cut valve (8) to close when the piston (10) compresses air for the first time upwards.
4. The auxiliary braking device in the engine cylinder according to claim 2, characterized in that a terminal (1) is connected to the pressure plate (2), and the terminal (1) is used for supplying power to the bidirectional electromagnet (4).
5. The auxiliary braking device in the engine cylinder according to claim 4, characterized in that the terminal (1) and the controller (9) are connected with an external power supply.
6. The auxiliary brake device in the engine cylinder according to claim 1, characterized in that the two-way electromagnet (4) is connected to the bottom surface of the pressure plate (2) by fastening bolts (3).
7. A braking method of an in-cylinder auxiliary brake apparatus for an engine according to any one of claims 1 to 6, characterized by comprising:
opening the inlet valve (13), and descending the piston (10) to enable gas to enter a piston cylinder;
-closing the inlet valve (13), making the piston (10) compress the air for the first time upwards and moving the stopper (12) to the first position to let the gas enter the exhaust channel (7);
opening the inlet valve (13), and descending the piston (10) to enable gas to enter a piston cylinder;
and closing the inlet valve (13), enabling the piston (10) to ascend again to compress air, and enabling the stop block to move to the first position so that the gas in the exhaust passage (7) reacts on the piston (10) to realize piston cylinder auxiliary braking.
8. A road roller comprising an engine cylinder auxiliary brake as claimed in any one of claims 1 to 6.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110554707.7A CN113153479A (en) | 2021-05-21 | 2021-05-21 | Auxiliary braking device in engine cylinder, braking method and road roller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110554707.7A CN113153479A (en) | 2021-05-21 | 2021-05-21 | Auxiliary braking device in engine cylinder, braking method and road roller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN113153479A true CN113153479A (en) | 2021-07-23 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202110554707.7A Pending CN113153479A (en) | 2021-05-21 | 2021-05-21 | Auxiliary braking device in engine cylinder, braking method and road roller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN113153479A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5758620A (en) * | 1997-03-21 | 1998-06-02 | Detroit Diesel Corporation | Engine compression brake system |
| US20110120411A1 (en) * | 2009-11-23 | 2011-05-26 | International Engine Intellectual Property Company, Llc | Solenoid control for valve actuation in engine brake |
| WO2018034749A1 (en) * | 2016-08-19 | 2018-02-22 | Pacbrake Company | Compression-release engine brake system for lost motion rocker arm assembly and method of operation thereof |
| CN110566313A (en) * | 2019-10-19 | 2019-12-13 | 潍坊力创电子科技有限公司 | electromagnet driven brake device in engine cylinder |
| CN110566311A (en) * | 2019-10-19 | 2019-12-13 | 潍坊力创电子科技有限公司 | Common rail system driven in-cylinder brake device of engine |
-
2021
- 2021-05-21 CN CN202110554707.7A patent/CN113153479A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5758620A (en) * | 1997-03-21 | 1998-06-02 | Detroit Diesel Corporation | Engine compression brake system |
| US20110120411A1 (en) * | 2009-11-23 | 2011-05-26 | International Engine Intellectual Property Company, Llc | Solenoid control for valve actuation in engine brake |
| WO2018034749A1 (en) * | 2016-08-19 | 2018-02-22 | Pacbrake Company | Compression-release engine brake system for lost motion rocker arm assembly and method of operation thereof |
| CN110566313A (en) * | 2019-10-19 | 2019-12-13 | 潍坊力创电子科技有限公司 | electromagnet driven brake device in engine cylinder |
| CN110566311A (en) * | 2019-10-19 | 2019-12-13 | 潍坊力创电子科技有限公司 | Common rail system driven in-cylinder brake device of engine |
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Application publication date: 20210723 |