CN1673504A - Valve throttling engine speed reducer - Google Patents
Valve throttling engine speed reducer Download PDFInfo
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- CN1673504A CN1673504A CN 200510057030 CN200510057030A CN1673504A CN 1673504 A CN1673504 A CN 1673504A CN 200510057030 CN200510057030 CN 200510057030 CN 200510057030 A CN200510057030 A CN 200510057030A CN 1673504 A CN1673504 A CN 1673504A
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Abstract
The novel engine retarder includes oil inlet channel, solenoid valve, oil outlet channel, non-return valve, work oil channel, driving piston, spring sheet, etc. It has two regulating structures, the first regulating structure has one regulating washer to regulate the interval between the screw plug and the limiting step on the regulating piston to ensure the precise moving distance of the driving piston, and the second regulating structure has regulating screw to regulate the assembly of screw plug and the regulating piston in proper position inside the piston cavity to ensure the precise gap between the driving piston and regulating piston and the precise initial opening height of the exhaust door. The present invention has also oil discharging channel to regulate the throttle opening and ideal braking force under different rotation speed.
Description
Technical field
The present invention relates to a kind of mechanical hydraulic unit of controlling valve motion, be specifically related to a kind ofly can change valve proper motion rule, thereby make motor can send the valve throttling engine speed reducer of brake horsepower.
Background technique
Slowing down speed of engine can temporarily change motor into an air compressor, transmission system by vehicle drags running, ceaselessly discharge high-pressure air, thereby absorb kinergety, reach the purpose of slowing down vehicle movement speed to vehicle to waste pipe.Therefore be modern vehicle, a kind of complemental brake system of heavy truck, motorbus particularly, it can significantly strengthen the deceleration Safety performance of vehicle.
Valve throttling engine speed reducer is simple in structure, cost is low, reliable operation, and its operational noise is significantly less than the compression-release type engine brake.It can be used in combination increase braking force with the outer throttle type slowing down speed of engine of cylinder, also can use with the combination of variable cross section pressurized machine to increase braking force.Therefore, valve throttling engine speed reducer begins to be paid attention to by people gradually, especially has special advantage on the middle low power motor.
In the prior art, U. S. Patent 3547087,4662332,5215054,5335636,5647319,6594996 etc. discloses the structural principle and the method for several valve throttling engine speed reducers.
U. S. Patent 3547087 has disclosed a kind of total travel opening type slowing down speed of engine.In this patented technology scheme, an auxiliary rocker arm and a driving mechanism have been increased.When driving mechanism when engine lubrication system has obtained the lubricant oil of pressure is arranged, just drive auxiliary rocker arm and arrive a working position, in this position, auxiliary rocker arm will stop that engine valve is taken a seat fully closes, and makes valve keep certain aperture.Cut off the lubricant oil of driving mechanism and supply with, auxiliary rocker arm resets to the position that quits work under the effect of return spring, no longer engine valve actuating mechanism is produced any influence.Because needing increases an auxiliary rocker arm, may not have the position to install on some motor, and retarder can not make the Lift of the exhaust valve of being controlled change with engine speed.
U. S. Patent 4870930 disclosed slowing down speed of engine, its electromagnet need have enough suction just can overcome the pretightening force of valve spring and the air pressure in the cylinder.On some motor, can't realize at all, and the Lift of engine exhaust port is changed with rotating speed.
U. S. Patent 5215054 discloses a kind of partial journey opening type slowing down speed of engine.This device mainly comprises a solenoid valve, an action piston and a position limit pin.During braking, supply pressure lubricant oil, pressure oil make the action piston stretch out opening in the stroke of exhaust valve, its height that stretches out is limited by position limit pin, opens the peak of stroke greatly about exhaust valve, the solenoid valve energising, with the oil seal that the drive actions piston stretches out, when exhaust valve closing, the action piston will stop exhaust valve closing, keep certain aperture, through air inlet and compression stroke, up to the compression stroke terminal point, the solenoid valve outage, action piston reset, exhaust valve are taken a seat and are finished once circulation.Equally, this scheme can't make the Lift of engine exhaust port change with rotating speed, and exhaust valve all carries out one-shot and takes a seat in every circulation under the control that is not subjected to driving cam, and this may damage engine exhaust port.
U. S. Patent 5535636 has disclosed a kind of method of opening exhaust valve with the rotating eccentricity cover.In non-braking state, eccentric bushing is in a position, and this position makes the rotating center of exhaust valve rocker arm be in a normal position.The rotating eccentricity cover rotating center of rocking arm is changed (moving to valve opening direction), thereby exhaust valve just can not cut out fully.Similarly, this scheme can't make the Lift of engine exhaust port change with rotating speed.
U. S. Patent 5647319,5655499 also is to adopt the method for rotating eccentricity cover to open exhaust valve, these two patents are that with U. S. Patent 5535636 differences its mechanism that drives eccentric bushing is different, this mechanism can allow eccentric bushing be in three positions, the closed position in the time of promptly need not braking, slow-speed of revolution position and high rotating speed position when needing braking.In slow-speed of revolution position, exhauxt valve opens is highly less, and Lift is bigger during high rotating speed.And U. S. Patent 5535636 has only two positions, i.e. opening and closing, and the Lift of exhaust valve is fixed.
In the prior art, all do not relate to the exhauxt valve opens height with this problem of rotation speed change and the relevant solution of proposition, though 5647319 and 5655499 patents have been discussed the Lift problem of exhaust valve and have been realized the two-stage adjustment, can not realize full rotating speed adjustment.
When motor enters braking state and is in high rotating speed,, just require exhaust valve to keep big Lift because absolute period of exhaust is short.If the aperture of the exhaust valve that retarder is controlled is little, then the pressed gas in the cylinder has little time throttling and discharges, and when the expansion stroke of motor energy return engine piston, cause the Braking efficiency of motor to descend; On the contrary, when motor is in the slow-speed of revolution,, just require exhaust valve to keep little Lift because absolute period of exhaust is long.If the aperture of the exhaust valve that retarder is controlled is big, then the throttling release pressure of being set up in the cylinder is with little, and this also can cause the Braking efficiency of motor to descend.Therefore, the Lift of exhaust valve should change with the rotating speed of motor is different, strengthens the exhauxt valve opens height when rotating speed is high, reduces the exhauxt valve opens height when rotating speed is low.Under each rotating speed of motor, all there is a desirable opening value in the aperture of the exhaust valve that retarder is controlled, and under this aperture, motor just has a desirable braking force, and aperture is bigger than normal and less than normal, and the Braking efficiency of motor will be descended.
In aforementioned existing patent, do not relate to this problem yet.Motor is after entering braking state, if retarder can make the Lift of the exhaust valve of being controlled change with engine speed and adapt to the needs that engine air in-cylinder pressure gas throttling discharges, just can make motor under each rotating speed, all give play to desirable braking force.
Summary of the invention
Above-mentioned defective at present valve throttling engine speed reducer existence, the object of the present invention is to provide a kind of initial Lift that can accurately control engine exhaust port, with make the engine exhaust port Lift can be in the full speed range of motor, the valve throttling engine speed reducer of adjusting according to the size of engine speed.
Realize above-mentioned purpose, the present invention adopts following technical proposals: a kind of valve throttling engine speed reducer, comprise housing, solenoid valve, work oil duct, driven plunger and adjusting screw, it is directly installed on the internal combustion engine, the lubrication system of motor provides the lubricant oil of low pressure to solenoid valve by oil input channel, the draining road is communicated with the lubricating oil bath of motor, and the oil road of solenoid valve is communicated with the work oil duct by one-way valve; The work oil duct passes to the piston cavity that is positioned on the housing, in the bottom of piston cavity balance oil hole is set and passes to the engine lubrication oil sump;
Regulating piston is set in the piston cavity, driven plunger chamber and tapped hole are arranged in its body, driven plunger chamber and tapped hole form limited step; Its periphery processes a circumferential groove in its end portion alignment work oil duct, establishes radial direction through hole circumferential groove in its end portion and tapped hole are communicated with;
If a plug screw is connected as a single entity by the tapped hole of adjusting packing ring and regulating piston, establish the spacing gap of staying driven plunger between the plug screw underpart and the spacing shaft shoulder;
Driven plunger is arranged in the driven plunger chamber, its lower end aligned engine exhaust port, and and exhaust valve between establish and stay gap, a upper end shaft shoulder of limiting, also be provided with the return shaft shoulder on the driven plunger;
One end of a spring sheet is fixed on the housing, and the other end is pressed on the return shaft shoulder of driven plunger, and driven plunger is pressed on the plug screw, and plug screw and the formed assembly of regulating piston are pressed on the adjusting screw; Be positioned at the upper-end surface of the bottom of the adjusting screw on the housing over against plug screw;
In the zone that circumferential groove in its end portion, tapped hole and work oil duct are interconnected, the draining passage is set.
Described draining passage is for axially being located at the draining hole on the plug screw.
Described draining passage is the draining hole of being located on branch's oil duct, and described branch oil duct is communicated with the work oil duct.
Described draining passage is to be located at two draining holes between branch's oil duct, and described branch oil duct is communicated with work oil duct and oil road respectively.
In disclosed throttling engine speed reducer structure, be provided with two and adjust structure, first adjusts structure adjusts packing ring by one, rationally regulate the distance between the limited step on plug screw and the regulating piston, make that the move distance of driven plunger is guaranteed accurately; Second adjusts structure by adjusting the appropriate location of assembly in piston cavity that adjusting screw forms plug screw and regulating piston, makes that the gap between driven plunger and the exhaust valve can be guaranteed accurately.Like this, when apparatus of the present invention were worked, the initial Lift of the exhaust valve that driven plunger is opened just can be precisely controlled.In addition, also by a draining passage is set, the Lift of engine exhaust port can be adjusted automatically in the full speed range of motor in the structure of the present invention.The present invention has novel ingenious, reasonable in design, simple in structure, has that volume is little, an advantage such as light weight, with low cost, reliable operation, and mounting arrangements is also very convenient, is suitable for promoting the use.
Description of drawings
Fig. 1: the structural principle schematic representation of valve throttling engine speed reducer of the present invention.Be in closed condition.
Fig. 2: the structural principle schematic representation of valve throttling engine speed reducer of the present invention.Be in opening state.
Fig. 3: the movement profiles of prior art exhaust valve.
Fig. 4: the movement profiles of valve throttling engine speed reducer exhaust valve of the present invention.
Fig. 5: the structural principle schematic representation of another mode of execution of the present invention.Be in opening state.
Fig. 6: the structural principle schematic representation of another mode of execution of the present invention.Be in opening state.
Embodiment
The invention will be further described below in conjunction with the drawings and specific embodiments.
As shown in Figure 1 and Figure 2, valve throttling engine speed reducer of the present invention comprises housing 2, solenoid valve 66, one-way valve 80, driven plunger 10, draining hole 32, adjusting screw 36 etc.It is directly installed on the cylinder cap 3 of an internal combustion engine, is equipped with on the housing 2 to finish the needed part of braking function.
To solenoid valve 66 supplying lubricating oils, draining road 70 is communicated with solenoid valve 66 the lubrication system (not shown) of motor with engine lubrication oil sump (not shown) by oil input channel 68.Oil road 72 is communicated with one-way valve 80 and solenoid valve 66.When solenoid valve 66 energising, the lubricant oil of low pressure flows through oil input channel 68, solenoid valve 66 and enters oil road 72; When solenoid valve 66 outages, when solenoid valve 66 ends oil input channel 68 oil road 72 and draining road 70 are communicated with, at this moment, the lubricant oil in the oil road 72 flows back to the engine lubrication oil sump through solenoid valve 66, draining road 70.
One-way valve 80 is between oil road 72 and work oil duct 54, and one-way valve 80 is applied on the aperture that precompression is pressed in oil road 72 by a pressure spring 82 and seals, and 80 on one-way valve allows lubricant oil to flow to work oil duct 54 from oil road 72.
A regulating piston 18 is located in the piston cavity 5 that processes on the housing 2.Process driven plunger chamber 8 and tapped hole 24 in its body, driven plunger chamber 8 and tapped hole 24 form limited step 22; Its periphery processes a circumferential groove in its end portion 20 alignment work oil ducts 54, establishes radial direction through hole 19 circumferential groove in its end portion 20 and tapped hole 24 are communicated with.
A driven plunger 10 is arranged in driven plunger chamber 8, its lower end aligned engine exhaust port 1, and keep a gap 12 with exhaust valve 1, the upper end processes the spacing shaft shoulder 16, also has the return shaft shoulder 14 on the driven plunger 10.
It is spacing that 30 pairs of driven plunger of plug screw 10 that are arranged in tapped hole 24 are carried out, and the range of movement of driven plunger 10 is gap 50.Adjust packing ring 26 and be used for the size of accurate adjusting play 50.
On plug screw 30, process an axial draining hole 32, and end face processes a drain pan 31 and 32 connections of draining hole radially thereon.Lubricant oil in the tapped hole 24 can flow to the bottom of piston cavity 5 by draining hole 32, drain pan 31, and passes to the engine lubrication oil sump by balance oil hole 28.
A upper-end surface that is positioned at the lower end of the adjusting screw 36 on the housing 2 over against plug screw 30, and plug screw 30 and regulating piston 18 formed assemblies regulated the location, adjusting screw 36 is locked by adjusting nut 34.
One end of a spring sheet 6 is fixed on the housing 2 by bolt 4, and the other end is pressed on the return shaft shoulder 14 of driven plunger 10, driven plunger 10 is pressed on the plug screw 30, thereby plug screw 30 and regulating piston 18 formed assemblies are pressed on the adjusting screw 36.
Analyze the working procedure of valve throttling engine speed reducer of the present invention below, what Fig. 1 represented is that valve throttling engine speed reducer of the present invention is in closed condition.
Give solenoid valve 66 outages, when oil input channel 68 is cut off, oil road 72 and draining road 70 are communicated with, flow of lubricant in the oil road 72 loses pressure to the engine lubrication oil sump, when motor enters exhaust stroke, one-way valve 80 can not be open, after lubricant oil in the tapped hole 24 leaks away from draining hole 32, plug screw 30 and regulating piston 18 formed assemblies are pressed on the adjusting screw 36 by spring sheet 6, form gap 50 between the spacing shaft shoulder 16 and the limited step 22, form gap 12 between driven plunger 10 and the engine exhaust port 1, retarder keeps closed condition.This moment, motor was not influenced by any of retarder by normal acting mode operation.
Shown in Figure 2 is that valve throttling engine speed reducer of the present invention is in opening state.
In service at vehicle, give solenoid valve 66 energisings, draining road 70 is cut off, the lubricant oil of low pressure just flows to oil road 72 from oil input channel 68, overcome the active force of pressure spring 82 and push one-way valve 80 open, thereby flow to work oil duct 54, flow through circumferential groove in its end portion 20, radial direction through hole 19 and enter in the tapped hole 24, and overcome and promote driven plunger 10 behind the active force of spring sheet 6 and move downward, other has a fraction of lubricant oil by the bottom of draining hole 32, drain pan 31, piston cavity 5, the lubricating oil bath that balance oil hole 28 flows back to motor.After driven plunger 10 is crossed gap 12, if motor is in exhaust stroke, then driven plunger 10 continues to move downward till the spacing shaft shoulder 16 touches limited step 22, otherwise driven plunger 10 will touch exhaust valve 1 and stop motion, wait for that motor enters exhaust stroke, just continue then to move downward, till the spacing shaft shoulder 16 touches limited step 22.Motor remains in operation, when exhaust valve 1 touches driven plunger 10 in the closed procedure of pass, because the active force of exhaust valve 1 acts on the driven plunger 10, lubricating oil pressure in tapped hole 24, circumferential groove in its end portion 20, the work oil duct 54 is increased, the sealing thereby one-way valve 80 is taken a seat, driven plunger 10 just stops exhaust valve 1 and closes, and makes exhaust valve 1 form an initial opening 13, and this aperture is the poor of gap 50 and gap 12.Because the value in gap 50 and gap 12 can both accurately be regulated, so the initial Lift 13 of engine exhaust port 1 just can be guaranteed accurately.Motor remains in operation, draining hole 32 continues draining, make exhaust valve 1 reduce Lift gradually, up to entering compression stroke, in compression stroke, the Lift of exhaust valve 1 continues to reduce, formed Lift carries out throttling to the gas in the cylinder and is discharged in the gas exhaust piping, when motor enters expansion stroke, has not just had pressed gas in the cylinder, thereby motor produce power net loss is sent brake horsepower.When entering exhaust stroke again, finishes by motor the one action circulation.
Shown in Figure 3 is the Motion curves schematic representation of prior art exhaust valve.Exhaust valve all keeps a fixing Lift S at air inlet, compression and expansion stroke among the figure, and this Lift does not change with the rotating speed of motor.
Fig. 4 is the Motion curves schematic representation of valve throttling engine speed reducer exhaust valve of the present invention.Curve 300 is Motion curvess of motor exhaust valve when high rotating speed among the figure, and curve 400 is Motion curvess of motor exhaust valve when the slow-speed of revolution.When turning round under a certain rotating speed of motor between high and low rotating speed, its Motion curves is inevitable between curve 300 and curve 400, i.e. curve among Fig. 4 500.13 initial openings of representing exhaust valve among the figure are corresponding to the gap among Fig. 2 13.By correlation curve 300 and curve 400, as can be seen: when motor is braked under high rotating speed, big at the formed exhaust valve throttle opening of compression stroke; When motor is braked under the slow-speed of revolution, little at the formed exhaust valve throttle opening of compression stroke.
Draining hole 32 in prior figures 1, Fig. 2 structure is axially disposed within on the plug screw 30, and the lubricant oil that it leaked is by drain pan 31, the bottom of piston cavity 5 and the lubricating oil bath of balance oil hole 28 flow direction engines.Understandablely be: as long as the passage of draining is set, and the lubricant oil in the described zone is carried out suitable leakage in the zone that circumferential groove in its end portion 20, tapped hole 24 and work oil duct 54 are interconnected, just can reach disclosed effect and purpose.So, the draining passage not only can be arranged on the plug screw 30, also can be arranged on (referring to following Fig. 5 embodiment) on the work oil duct 54, also can be arranged between work oil duct 54 and the oil road 72, also can utilize the gap between regulating piston 18 and the piston cavity 5 to form the draining passage, make the lubricant oil in the circumferential groove in its end portion 20 carry out suitable leakage.When being arranged between work oil duct 54 and the oil road 72, can shown in next Fig. 6 embodiment, carry out the setting in draining hole 32, one-way valve 80 also can adopt the non-sphere one-way valve, and draining hole 32 is set on this one-way valve.
Structural drawing shown in Figure 5 is another embodiment of valve throttling engine speed reducer of the present invention, is in opening state.The draining hole 32 of present embodiment has been arranged on the work oil duct 54.On work oil duct 54 branch's oil duct 40 is set, draining element 38 is set on the aperture of branch's oil duct 40, draining hole 32 axially is set on the draining element 38, the engine lubrication oil sump is led in draining hole 32.The working principle of present embodiment and process and earlier figures 1, Fig. 2 embodiment are in full accord, just are not repeated in this description here.
Structural drawing shown in Figure 6 is another embodiment of valve throttling engine speed reducer of the present invention, is in opening state.Present embodiment is that draining hole 32 is arranged between oil road 72 and the work oil duct 54, and the lubricant oil that is leaked leads to oil road 72, can reach disclosed effect and purpose equally.Compare with Fig. 5 structure: on oil road 72, set up branch's oil duct 86, on work oil duct 54, set up branch's oil duct 84, between oil duct 84 and oil duct 86, draining hole 32 is set, cancel branch's oil duct 40 and draining element 38 in Fig. 5 structure simultaneously.All the other structures and Fig. 5 structure are in full accord, just are not repeated in this description here.
The working procedure difference of the working procedure of present embodiment and Fig. 1, Fig. 2 and Fig. 5 is: when exhaust valve touches driven plunger 10 in the closed procedure of pass, cause pressure increase formation high pressure in the tapped hole 24, thereby the pressure of work oil duct 54 and branch's oil duct 84 increases and forms high pressure, and the pressure in branch's oil duct 86 is low pressure, lubricant oil just flows to branch's oil duct 86 by draining hole 32 from branch's oil duct 84, thereby the lubricant oil in the work oil duct 54 is let out to oil road 72, reaches the draining purpose identical with Fig. 5 structure with Fig. 1, Fig. 2.All the other working procedure are identical, just are not repeated in this description.
By the front to the disclosed valve throttling engine speed reducer structural principle and the description of working procedure, as can be seen:
Be provided with two and adjust structure in disclosed throttling engine speed reducer structure, first adjusts structure makes that the move distance (being gap 50) of driven plunger 10 can be guaranteed accurately; In the time of on slowing down speed of engine fit on motor, second adjusts structure makes that the gap 12 between driven plunger 10 and the exhaust valve 1 can be guaranteed accurately.When apparatus of the present invention were worked, the initial Lift 13 of the exhaust valve 1 that driven plunger is opened (being the poor of gap 50 and gap 12) just can be precisely controlled like this.
In addition, also be provided with a draining passage in the disclosed structure, make disclosed valve throttling engine speed reducer, can in the full speed range of motor, the size according to engine speed adjust exhaust valve 1 formed throttle opening, make motor under each rotating speed, all send desirable braking force.Motor is when high rotation speed operation, and exhaust valve 1 formed throttle opening is big; When motor turned round in the slow-speed of revolution, exhaust valve 1 formed throttle opening was little.This is because the oil mass that the draining passage is leaked can change with the rotating speed of motor.When engine speed was high, because the draining absolute time is short, the oil mass of being leaked was just few, and exhaust valve 1 formed throttle opening is just big; When engine speed was hanged down, because the draining absolute time is long, the oil mass of being leaked was just many, and exhaust valve 1 formed throttle opening is just little.Therefore, retarder of the present invention can have been given play to desirable Braking efficiency in the full speed range of motor, and the retarder of prior art can only be at motor have been given play to desirable Braking efficiency under some or two rotating speeds.Can utilize disclosed oil drainage method, prior art is transformed, exhaust valve 1 formed throttle opening is changed with the rotating speed of motor.
Claims (4)
1, a kind of valve throttling engine speed reducer, comprise housing (2), solenoid valve (66), work oil duct (54), driven plunger (10) and adjusting screw (36), it is directly installed on the internal combustion engine, the lubrication system of motor provides the lubricant oil of low pressure to solenoid valve (66) by oil input channel (68), draining road (70) is communicated with the lubricating oil bath of motor, it is characterized in that:
The oil road (72) of solenoid valve (66) is communicated with work oil duct (54) by one-way valve (80); Work oil duct (54) passes to the piston cavity (5) that is positioned on the housing (2), in the bottom of piston cavity (5) balance oil hole (28) is set and passes to the engine lubrication oil sump;
Regulating piston (18) is set in the piston cavity (5), driven plunger chamber (8) and tapped hole (24) are arranged in its body, driven plunger chamber (8) and tapped hole (24) form limited step (22); Its periphery processes a circumferential groove in its end portion (20) alignment work oil duct (54), establishes radial direction through hole (19) circumferential groove in its end portion (20) and tapped hole (24) are communicated with;
If a plug screw (30) is connected as a single entity by the tapped hole (24) of adjusting packing ring (26) and regulating piston (18), establish the spacing gap (50) of staying driven plunger (10) between plug screw (30) underpart and the spacing shaft shoulder (16);
Driven plunger (10) is arranged in driven plunger chamber (8), its lower end aligned engine exhaust port (1), and and exhaust valve (1) between establish and stay gap (12), the upper end shaft shoulder (16) of limiting, also be provided with the return shaft shoulder (14) on the driven plunger (10);
One end of a spring sheet (6) is fixed on the housing (2), the other end is pressed on the return shaft shoulder (14) of driven plunger (10), driven plunger (10) is pressed on the plug screw (30), plug screw (30) and the formed assembly of regulating piston (18) are pressed on the adjusting screw (36); Be positioned at the upper-end surface of the bottom of the adjusting screw (36) on the housing (2) over against plug screw (30);
In the zone that circumferential groove in its end portion (20), tapped hole (24) and work oil duct (54) are interconnected, the draining passage is set.
2, slowing down speed of engine according to claim 1 is characterized in that: described draining passage is for axially being located at the draining hole (32) on the plug screw (30).
3, slowing down speed of engine according to claim 1 is characterized in that: described draining passage is for being located at the draining hole (32) on branch's oil duct (40), and described branch oil duct (40) is communicated with work oil duct (54).
4, slowing down speed of engine according to claim 1, it is characterized in that: described draining passage is for being located at the draining hole (32) between branch's oil duct (84) and branch's oil duct (86), described branch oil duct (84) is communicated with work oil duct (54), and described branch oil duct (86) and oil road (72) are communicated with.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100570307A CN100344863C (en) | 2005-04-25 | 2005-04-25 | Valve throttling engine speed reducer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNB2005100570307A CN100344863C (en) | 2005-04-25 | 2005-04-25 | Valve throttling engine speed reducer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN1673504A true CN1673504A (en) | 2005-09-28 |
| CN100344863C CN100344863C (en) | 2007-10-24 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNB2005100570307A Expired - Fee Related CN100344863C (en) | 2005-04-25 | 2005-04-25 | Valve throttling engine speed reducer |
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| CN (1) | CN100344863C (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267050A (en) * | 2011-01-25 | 2011-12-07 | 南通高盛机械制造有限公司 | Hydraulic pretightening device for automatic regroup bolts |
| CN103670722A (en) * | 2013-11-21 | 2014-03-26 | 潍柴动力股份有限公司 | Method and system for monitoring exhaust brake state of engine |
| CN110541761A (en) * | 2019-09-30 | 2019-12-06 | 江苏卓联精密机械有限公司 | Quick oil-filled engine brake hydraulic control device |
| CN115355071A (en) * | 2022-10-24 | 2022-11-18 | 龙口中宇热管理系统科技有限公司 | In-cylinder brake mechanism and method for engine |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3547087A (en) * | 1968-08-09 | 1970-12-15 | White Motor Corp | Engine valve control for braking operation |
| US5215054A (en) * | 1990-10-22 | 1993-06-01 | Jenara Enterprises Ltd. | Valve control apparatus and method |
| CN100404804C (en) * | 2003-05-13 | 2008-07-23 | 马银良 | Engine speed buffer |
| CN1318744C (en) * | 2004-01-03 | 2007-05-30 | 马银良 | Motor speed slower |
-
2005
- 2005-04-25 CN CNB2005100570307A patent/CN100344863C/en not_active Expired - Fee Related
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102267050A (en) * | 2011-01-25 | 2011-12-07 | 南通高盛机械制造有限公司 | Hydraulic pretightening device for automatic regroup bolts |
| CN102267050B (en) * | 2011-01-25 | 2013-04-03 | 南通高盛机械制造有限公司 | Hydraulic pretightening device for automatic regroup bolts |
| CN103670722A (en) * | 2013-11-21 | 2014-03-26 | 潍柴动力股份有限公司 | Method and system for monitoring exhaust brake state of engine |
| CN110541761A (en) * | 2019-09-30 | 2019-12-06 | 江苏卓联精密机械有限公司 | Quick oil-filled engine brake hydraulic control device |
| CN110541761B (en) * | 2019-09-30 | 2024-04-05 | 江苏卓联精密机械有限公司 | Engine brake hydraulic control device capable of filling oil quickly |
| CN115355071A (en) * | 2022-10-24 | 2022-11-18 | 龙口中宇热管理系统科技有限公司 | In-cylinder brake mechanism and method for engine |
Also Published As
| Publication number | Publication date |
|---|---|
| CN100344863C (en) | 2007-10-24 |
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