CN102505976B - Engine brake - Google Patents
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- CN102505976B CN102505976B CN201110378295.2A CN201110378295A CN102505976B CN 102505976 B CN102505976 B CN 102505976B CN 201110378295 A CN201110378295 A CN 201110378295A CN 102505976 B CN102505976 B CN 102505976B
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Abstract
The invention provides a kind of engine brake, belong to field of mechanical technique.This engine brake comprises housing, be located at the solenoid valve on housing successively, one-way valve and piston assembly, the oil duct one be communicated with solenoid valve filler opening is also provided with in housing, the oil duct three that connected electromagnetic valve oil outlet is communicated with one-way valve oil outlet with one end with the oil duct two of one-way valve filler opening, housing is provided with a cavity, the other end of oil duct three is communicated with cavity and its joint is positioned at the bottom of cavity, piston assembly comprises and is fixed on piston rod bottom cavity and sheathed piston on the piston rod, piston and cavity be sealed and matched and this piston can in oil duct three hydraulic fluid pressure effect under axially outwards mobile along cavity, the limit structure of limited piston moving range is provided with between piston rod and piston, also be provided with between piston rod and piston when making its return unit resetted after piston moving displacement.This engine brake has long service life, advantage that driving safety is high.
Description
Technical field
The invention belongs to field of mechanical technique, relate to a kind of engine brake.
Background technique
The automobile travelled on mine or mountain highway often wants lower long slope, in order to prevent automobile from constantly accelerating to hazard level under Action of Gravity Field own, should carry out continuous braking to automobile, thus make the velocity-stabilization of automobile at certain safety value.But in this case, depending merely on service brake is be difficult to such braking task, will its temperature be made significantly to raise because break works continually, so that Braking efficiency decline is lost large even completely, therefore automobile mostly have matched complemental brake system.Engine brake is widely used on motorbus and heavy-duty commercial vehicle as complemental brake system, its utilization effectively reduces the mechanical wear of conventional brake, improve the working life of conventional brake, the safety reliability that effective raising vehicle travels, the working service cost of great reduction vehicle, Lifting Convey efficiency, particularly promotes the safety reliability of heavy-duty vehicle when lower long slope.
At present, the driven plunger designed by engine brake is the driving mechanism for opening engine exhaust port.Its structure is provided with to drive hydraulic pressure cavity, oil duct one, oil duct two on engine brake housing, drives hydraulic pressure cavity to be communicated with oil duct one, oil duct two.Driven plunger is arranged in and drives hydraulic pressure cavity, is pressed in an adjusting screw be screwed on engine brake housing by spring by driven plunger, and a locking nut is fastened on its position of setting up adjusting screw.The lower end of spring is by a pallet support, and supporting plate drives the jump ring in hydraulic pressure cavity to support by being arranged on.When engine brake quits work, due to oil duct one, oil duct two with drive in hydraulic pressure cavity without pressure, driven plunger is just crushed in an adjusting screw be screwed on engine brake housing under the force of a spring, and a locking nut is fastened on its position of setting up adjusting screw.
Due to supporting plate and driving hydraulic pressure cavity Spielpassung, under the effect of impacting with high pressure power, can wobble deviation be there is in the position of supporting plate in driving hydraulic pressure cavity, this wobble deviation causes jump ring circumference discontinuity, jump ring is thinner thin again, under the high-frequency action of engine rocker, driven plunger produces same high-frequency impact force, and the long-time discontinuity of jump ring easily produces crushability and lost efficacy.Jump ring was once lose efficacy, and it is spacing that supporting plate, spring, driven plunger will lose axially support; Even if there is no pressure in driving hydraulic pressure cavity, supporting plate, spring, driven plunger also can be deviate from outside driving hydraulic pressure cavity because conducting oneself with dignity, drive the high pressure liquid force feed in hydraulic pressure cavity will push engine valve push rod as run into move downward always, damage valve pintle hook lock, cause valve to come off and hit and encounter the danger that piston causes dozen cylinder.
Summary of the invention
The object of the invention is to there are the problems referred to above for existing technology, propose a kind of long service life, good braking effect and effectively can improve the engine brake of vehicle safety.
Object of the present invention realizes by following technical proposal:
This engine brake, comprise housing, be located at the solenoid valve on housing successively, one-way valve and piston assembly, the oil duct one be communicated with solenoid valve filler opening is also provided with in described housing, the oil duct three that connected electromagnetic valve oil outlet is communicated with one-way valve oil outlet with one end with the oil duct two of one-way valve filler opening, described housing is provided with a cavity, the other end of above-mentioned oil duct three is communicated with described cavity and its joint is positioned at the bottom of described cavity, it is characterized in that, described piston assembly comprises and is fixed on piston rod bottom cavity and sheathed piston on the piston rod, described piston and cavity be sealed and matched and this piston can in oil duct three hydraulic fluid pressure effect under axially outwards mobile along cavity, the limit structure of limited piston moving range is provided with between described piston rod and piston, also be provided with between described piston rod and piston when making its return unit resetted after piston moving displacement.
In this engine brake, the outer end of piston acts on exhaust valve, this exhaust valve is arranged on engine cylinder and covers and on this exhaust valve, be arranged with the valve spring that it can be made to reset, exhaust valve has limiting block edge near one end of piston, one end of valve spring is resisted against engine cylinder and covers, and its other end is resisted against limiting block along upper.After engine brake is opened, solenoid valve allows hydraulic oil to flow to one-way valve through oil duct two, and one-way valve allows hydraulic oil to flow to piston assembly through oil duct three under the effect of hydraulic fluid pressure.Piston is subject to the pressure of hydraulic oil along piston rod outwards movement, promoting exhaust valve makes exhaust valve open, as long as under the state being in energising at solenoid valve, piston is in and keeps complete retracted position, in cycle of engine four-stroke, guarantee the gap that exhauxt valve opens one is fixing.When after solenoid valve power-off, do not have hydraulic oil to flow to one-way valve in oil duct two, do not have hydraulic oil to flow to piston assembly in oil duct three, now piston resets under the effect of return unit, and exhaust valve then resets under the effect of valve spring.
In above-mentioned engine brake, described limit structure comprises the bar head of piston rod and described bar head is positioned at above-mentioned piston, be provided with one at the opening of described piston and be set in bounding means in the form of a ring on piston rod, the internal diameter of this bounding means is less than the external diameter of described bar head, and the bar head described in when axially outwards mobile along cavity under the effect of described piston at hydraulic fluid pressure can be resisted against on described bounding means.
The object arranging this limit structure is to prevent coming off of piston when piston outwards moves under hydraulic fluid pressure effect, piston is in the process of outwards movement, the bounding means being located at piston gap place abuts on the bar head of piston rod, stops piston to continue outwards mobile.
In above-mentioned engine brake, the opening of described piston has a ring-shaped step, above-mentioned bounding means is resisted against on this ring-shaped step, the inner side place that described piston is positioned at bounding means is provided with an annular groove, in described annular groove, be provided with the Steel Cable Baffle Ring that has opening, the opposite side of above-mentioned bounding means is resisted against on described Steel Cable Baffle Ring.
By ring-shaped step and Steel Cable Baffle Ring, bounding means is positioned on piston, first the bar head of piston rod is inserted in piston during installation, bounding means is placed on piston rod until bounding means abuts to ring-shaped step again, to be placed in annular groove after the Steel Cable Baffle Ring of opening a little elasticity extruding, place rear Steel Cable Baffle Ring to reset under the effect of its own resilient, make its part be connected in annular groove, another part protrude piston madial wall for bounding means against.This limit structure stable connection, easy for installation, can effectively prevent piston from coming off.
In above-mentioned engine brake, described return unit is spring, and one end of this spring is resisted against on bounding means, and its other end is resisted against the end of above-mentioned bar head.
First the bar head of piston rod is inserted in piston during installation, successively spring, bounding means are placed on piston rod until bounding means abuts to ring-shaped step, to be placed in annular groove after the Steel Cable Baffle Ring of opening a little elasticity extruding again, place rear Steel Cable Baffle Ring to reset under the effect of its own resilient, make its part be connected in annular groove, another part protrude piston madial wall for bounding means against.
In above-mentioned engine brake, described housing also offers a valve pocket, above-mentioned one-way valve is arranged in described valve pocket, this one-way valve comprises valve body, be located at valve seat in valve body and steel ball, spring one is also provided with between valve seat and steel ball, the two ends of described spring one act on valve seat and steel ball respectively, and steel ball blocking-up one-way valve filler opening described under the effect of this spring one elastic force is communicated with one-way valve oil outlet.
After engine brake is opened, the hydraulic oil in oil duct two enters into one-way valve filler opening, promotes steel ball and moves to the direction of spring one, and in the process of movement, spring one forced compression is out of shape, and now one-way valve filler opening is communicated with one-way valve oil outlet; After this engine braking air to close closes, the hydraulic oil in it tends to balance, and promotes steel ball and resets, blocked being communicated with of one-way valve filler opening and one-way valve oil outlet again when spring one resets.
In above-mentioned engine brake, the opening of described valve pocket is provided with and can carries out spacing snubber to one-way valve, spring two is provided with between described snubber and valve seat, one-way valve described under the elastic force effect of this spring two has the trend moved inward along valve pocket, and the one-way valve oil outlet above-mentioned when described one-way valve moves inward along valve pocket and oil duct three stagger.
Such setting can play double insurance, and except the break-make that steel ball controls one-way valve filler opening and one-way valve oil outlet, the break-make of the controlled liquefaction road two of valve body itself and oil duct three, under normal circumstances, one-way valve oil outlet and oil duct three stagger.After engine brake is opened, except the position of steel ball and spring one changes, the position of valve body also changes: in oil duct two, hydraulic oil promotes valve body, the direction of valve body along valve pocket to spring two is moved, in moving process, spring two forced compression is out of shape, until valve body abuts to snubber, and now one-way valve oil outlet and oil duct tee joint.After engine brake is closed, spring two resets and promotes valve body reset, makes one-way valve oil outlet and oil duct three stagger again.
In above-mentioned engine brake, described snubber cylindrically, and is provided with the valve gap of one-way valve in the outside of this snubber, described valve gap is positioned in described valve pocket by circlip.Arrange like this and mainly carry out spacing to snubber, prevent snubber from coming off in valve pocket; Tubular snubber can hold the valve seat of one-way valve, thus can save the space that one-way valve occupies.The spring two that this place is arranged is set on valve seat, and the other end passes snubber and is resisted against on valve gap.
In above-mentioned engine brake, described solenoid valve comprises the valve body one with filler opening and oil outlet, valve ball, valve rod and spring three, valve ball blocking-up solenoid valve filler opening described under the effect of this spring three elastic force is communicated with solenoid valve oil outlet, one end of described valve rod acts on valve ball, its the other end is connected with a holder, described valve body one is provided with the coil be placed on outside holder, holder described in when described coil electricity has the trend promoting valve ball movement, the solenoid valve filler opening above-mentioned when described valve ball moves is communicated with solenoid valve oil outlet.
Under conventional sense, the spring three pairs of valve balls be located in valve body one have elastic force, make valve ball block being communicated with of solenoid valve filler opening and solenoid valve oil outlet; When the coil is energized, holder promotes valve rod and then promotes valve ball to move to spring three direction, in moving process, spring three is compressed, and solenoid valve filler opening and solenoid valve oil outlet become connected state from blocking state, hydraulic oil can enter in valve body one through solenoid valve filler opening, then is flow in oil duct two by solenoid valve oil outlet.When after solenoid valve power-off, the spring three of compression needs to reset, and valve ball blocks being communicated with of solenoid valve filler opening and solenoid valve oil outlet again under the effect of spring three elastic force.
In above-mentioned engine brake, described valve body one also offers oil leak hole, above-mentioned spring three is arranged in described oil leak hole.When solenoid valve filler opening blocks with solenoid valve oil outlet, oil leak hole is communicated with solenoid valve oil outlet, and when solenoid valve filler opening is communicated with solenoid valve oil outlet, oil leak hole and solenoid valve oil outlet block.
Because this solenoid valve is arranged in engine brake, during braking, hydraulic oil enters into engine brake, when not needing braking, the hydraulic oil in engine brake need be discharged, so be provided with this oil leak hole.During coil electricity, valve ball extrusion spring three, solenoid valve filler opening is communicated with solenoid valve oil outlet, and now valve ball blocks oil leak hole, and solenoid valve oil outlet and oil leak hole are disconnected; When solenoid valve power-off, spring promotes valve ball and leaves oil leak hole, and makes valve ball block solenoid valve filler opening, and now oil leak hole is communicated with solenoid valve oil outlet, and the hydraulic oil in engine brake can be passed through oil leak hole and discharges.
In above-mentioned engine brake, the bottom of described cavity offers tapped through hole, above-mentioned piston rod is fixed in this tapped through hole by screw thread, and the shank portion of described piston rod stretches out tapped through hole, and the part of stretching out tapped through hole at described piston rod is arranged with tightening nut.
The tightening nut arranged is fixed piston rod on the one hand, can also regulate on the other hand to piston rod.First the bar head of piston rod is inserted in piston during installation, successively spring, bounding means are placed on piston rod until bounding means abuts to ring-shaped step, to be placed in annular groove after the Steel Cable Baffle Ring of opening a little elasticity extruding again, place rear Steel Cable Baffle Ring to reset under the effect of its own resilient, make its part be connected in annular groove, another part protrude piston madial wall for bounding means against.Then the shank portion of piston rod is inserted in tapped through hole from the side of cavity, binding thread of screwing on.
Compared with prior art, this engine brake has the following advantages:
When engine brake is opened, piston will be in and keep full extension state, in cycle of engine four-stroke, only make the gap that exhauxt valve opens one is fixing, so can not increase any load to camshaft and most of overhead part; This engine brake decreases the wearing and tearing of foundation brakes, decreases the frequency of utilization of service brake system; This engine brake can make wheel hub and type shells remain on lower temperature, and then can extend the working life of wheel shaft and type shells; This engine brake reduces the number of times of vehicle maintenance, and the service time of setting out on a journey increases, and has higher productivity.
Accompanying drawing explanation
Fig. 1 is the sectional view of this engine brake.
Fig. 2 is the sectional view of piston assembly provided by the invention.
Fig. 3 is the sectional view of one-way valve provided by the invention.
Fig. 4 is the sectional view of solenoid valve provided by the invention.
In figure, 1, housing; 11, oil duct one; 12, oil duct two; 13, oil duct three; 21, piston rod; 22, piston; 21a, bar head; 22a, bounding means; 22b, ring-shaped step; 22c, Steel Cable Baffle Ring; 23, tightening nut; 3, spring; 41, valve body; 42, valve seat; 43, steel ball; 44, spring one; 45, snubber; 46, spring two; 47, valve gap; 48, circlip; 51, valve body one; 52, valve ball; 53, valve rod; 54, spring three; 55, solenoid valve filler opening; 56, solenoid valve oil outlet; 57, holder; 58, coil; 59, oil leak hole; 61, exhaust valve; 61a, limiting block edge; 62, engine cylinder cover; 63, valve spring; 64, air valve bridge.
Embodiment
Be below specific embodiments of the invention and by reference to the accompanying drawings, technological scheme of the present invention is further described, but the present invention be not limited to these embodiments.
Engine brake as shown in Figure 1, it comprises housing 1, be located at the solenoid valve on housing 1, one-way valve and piston assembly successively, housing 1 is provided with a cavity, and in this housing 1, be provided with the oil duct 3 13 that the oil duct 1, the connected electromagnetic valve oil outlet 56 that are communicated with solenoid valve filler opening 55 be communicated with one-way valve oil outlet with left end with the oil duct 2 12 of one-way valve filler opening, as depicted in figs. 1 and 2, the right-hand member of oil duct 3 13 is communicated with cavity and its joint is positioned at the bottom of cavity.
As depicted in figs. 1 and 2, the piston assembly at this place is arranged in cavity, it comprises the piston rod 21 be fixed on bottom cavity and the piston 22 be set on piston rod 21, piston 22 and cavity be sealed and matched and this piston 22 can in oil duct 3 13 hydraulic fluid pressure effect under axially move down along cavity, as shown in Figure 2, between piston rod 21 and piston 22, be provided with the limit structure of limited piston 22 moving range, be also provided with between piston rod 21 and piston 22 when making its return unit resetted after piston 22 moving displacement.
Concrete, as shown in Figure 2, limit structure comprises the bar head 21a of piston rod 21 and the lower end of bar head 21a is inserted in piston 22, be provided with one at the opening of piston 22 and be set in bounding means 22a in the form of a ring on piston rod 21, the internal diameter of this bounding means 22a is less than the external diameter of bar head 21a, and when axially outwards mobile along cavity under the effect of piston 22 at hydraulic fluid pressure, bar head 21a can be resisted against on bounding means 22a.The object arranging this limit structure is to prevent coming off of piston 22 when piston 22 outwards moves under hydraulic fluid pressure effect, piston 22 is in the process of outwards movement, the bounding means 22a being located at piston 22 opening abuts on the bar head 21a of piston rod 21, stops piston 22 to continue outside movement.
As shown in Figure 2, at the opening of piston 22, there is a ring-shaped step 22b, the lower end abutment of bounding means 22a is on this ring-shaped step 22b, the inner side place being positioned at bounding means 22a is on the piston 22 provided with an annular groove, in this annular groove, be provided with the Steel Cable Baffle Ring 22c that has opening, the upside of bounding means 22a is resisted against on Steel Cable Baffle Ring 22c.Located on the piston 22 by bounding means 22a by ring-shaped step 22b and Steel Cable Baffle Ring 22c, as depicted in figs. 1 and 2, the return unit in the present embodiment is spring 3, and one end of this spring 3 is resisted against on bounding means 22a, and the other end is resisted against on the end of bar head 21a.
As shown in Figure 2, offer tapped through hole in the bottom of cavity, piston rod 21 is fixed in this tapped through hole by screw thread, and the shank portion of piston rod 21 stretches out tapped through hole, and the part of stretching out tapped through hole at piston rod 21 is arranged with tightening nut 23.Tightening nut 23 1 aspect that this place is arranged is fixed piston rod 21, can also regulate on the other hand to piston rod 21.
First the bar head 21a of piston rod 21 is inserted in piston 22 during installation, successively spring 3, bounding means 22a are placed on piston rod 21 until bounding means 22a abuts to ring-shaped step 22b, to be placed in annular groove after the Steel Cable Baffle Ring 22c of opening a little elasticity extruding again, place rear Steel Cable Baffle Ring 22c to reset under the effect of its own resilient, make its part be connected in annular groove, the madial wall that another part protrudes piston 22 for bounding means 22a against.Then the shank portion of piston rod 21 is inserted in tapped through hole from the side of cavity, binding thread of screwing on.This limit structure stable connection, easy for installation, can effectively prevent piston 22 from coming off.
As shown in Figure 1, the lower end of piston 22 acts on exhaust valve 61, this exhaust valve 61 to be arranged on engine cylinder cover 62 and on this exhaust valve 61, to be arranged with the valve spring 63 that it can be made to reset, exhaust valve 61 has limiting block along 61a near one end of piston 22, one end of valve spring 63 is resisted against on engine cylinder cover 62, and its other end is resisted against limiting block along on 61a.In the present embodiment, exhaust valve 61 is two, above two exhaust valves 61, be provided with air valve bridge 64, and the lower end abutment of piston 22 is on this air valve bridge 64.As shown in Figure 1, after engine brake is opened, solenoid valve allows hydraulic oil to flow to one-way valve through oil duct 2 12, and one-way valve allows hydraulic oil to flow to piston assembly through oil duct 3 13 under the effect of hydraulic fluid pressure.Piston 22 is subject to the pressure of hydraulic oil along piston rod 21 outwards movement, promoting exhaust valve 61 makes exhaust valve 61 open, as long as under the state being in energising at solenoid valve, piston 22 is in and keeps complete retracted position, in cycle of engine four-stroke, guarantee that a fixing gap opened by exhaust valve 61.When after solenoid valve power-off, do not have hydraulic oil to flow to one-way valve in oil duct 2 12, do not have hydraulic oil to flow to piston assembly in oil duct 3 13, now piston 22 resets under the effect of return unit, and exhaust valve 61 then resets under the effect of valve spring 63.
As shown in figures 1 and 3, housing 1 also offers a valve pocket, one-way valve is just arranged in this valve pocket, this one-way valve comprises valve body 41, be located at valve seat 42 in valve body 41 and steel ball 43, spring 1 is also provided with between valve seat 42 and steel ball 43, the two ends of spring 1 act on valve seat 42 and steel ball 43 respectively, and under the effect of this spring 1 elastic force, steel ball 43 blocks being communicated with of one-way valve filler opening and one-way valve oil outlet.As shown in Figure 3, be provided with can carry out spacing snubber 45 to one-way valve at the opening of valve pocket, spring 2 46 is provided with between snubber 45 and one-way valve, under the elastic force effect of this spring 2 46, one-way valve has the trend moved inward along valve pocket, and one-way valve oil outlet and oil duct 3 13 stagger when one-way valve moves inward along valve pocket.Snubber 45 in the present embodiment cylindrically, and is provided with the valve gap 47 of one-way valve in the outside of this snubber 45, valve gap 47 is positioned in valve pocket by circlip 48.The spring 2 46 that this place is arranged is set on valve seat 42, and the other end passes snubber 45 and is resisted against on valve gap 47.Such setting can play double insurance, and except the break-make that steel ball 43 controls one-way valve filler opening and one-way valve oil outlet, the break-make of controlled liquefaction road 2 12 of valve body 41 itself and oil duct 3 13, under normal circumstances, one-way valve oil outlet and oil duct 3 13 stagger.
After engine brake is opened, except the position of steel ball 43 and spring 1 changes, the position of valve body 41 also changes: in oil duct 2 12, hydraulic oil promotes valve body 41, valve body 41 is moved up along valve pocket, in moving process, spring 2 46 forced compression is out of shape, until valve body 41 abuts to snubber 45, now one-way valve oil outlet is communicated with oil duct 3 13.After engine brake is closed, spring 2 46 reset promotes valve body 41 and resets, and makes one-way valve oil outlet and oil duct 3 13 stagger again.
As shown in Figure 1 and Figure 4, solenoid valve comprises the valve body 1 with filler opening and oil outlet, valve ball 52, valve rod 53 and spring 3 54, being communicated with of solenoid valve filler opening 55 and solenoid valve oil outlet 56 is blocked at the effect lower valve ball 52 of this spring 3 54 elastic force, the lower end of valve rod 53 acts on valve ball 52, the upper end of valve rod 53 is connected with a holder 57, valve body 1 is provided with the coil 58 be placed on outside holder 57, when coil 58 is energized, holder 57 has the trend promoting valve ball 52 and move down, when valve ball 52 moves down, solenoid valve filler opening 55 is communicated with solenoid valve oil outlet 56.As shown in Figure 4, under conventional sense, the spring 3 54 pairs of valve balls 52 be located in valve body 1 have elastic force, make valve ball 52 block being communicated with of solenoid valve filler opening 55 and solenoid valve oil outlet 56.
As shown in Figure 4, because this solenoid valve is arranged in engine brake, during braking, hydraulic oil enters into engine brake, when not needing braking, hydraulic oil in engine brake need be discharged, so also offer oil leak hole 59 on valve body 1, spring 3 54 is arranged in this oil leak hole 59.When solenoid valve filler opening 55 blocks with solenoid valve oil outlet 56, oil leak hole 59 is communicated with solenoid valve oil outlet 56, and when solenoid valve filler opening 55 is communicated with solenoid valve oil outlet 56, oil leak hole 59 and solenoid valve oil outlet 56 block.
When coil 58 is energized, valve ball 52 extrusion spring 3 54, solenoid valve filler opening 55 is communicated with solenoid valve oil outlet 56, and now valve ball 52 blocks oil leak hole 59, and solenoid valve oil outlet 56 and oil leak hole 59 are disconnected; When solenoid valve power-off, spring 3 54 promotes valve ball 52 and leaves oil leak hole 59, and makes valve ball 52 block solenoid valve filler opening 55, and now oil leak hole 59 is communicated with solenoid valve oil outlet 56, and the hydraulic oil in engine brake can be passed through oil leak hole 59 and discharges.
When engine brake is opened, piston 22 will be in and keep full extension state, in cycle of engine four-stroke, only make exhaust valve 61 open a fixing gap, so can not increase any load to camshaft and most of overhead part; This engine brake decreases the wearing and tearing of foundation brakes, decreases the frequency of utilization of service brake system; This engine brake can make wheel hub and type shells remain on lower temperature, and then can extend the working life of wheel shaft and type shells; This engine brake reduces the number of times of vehicle maintenance, and the service time of setting out on a journey increases, and has higher productivity.
This engine brake is work like this:
When 1, opening engine brake, the coil 58 of solenoid valve is energized, move down under the effect of the electromagnetic field that holder 57 produces at coil 58, valve rod 53 is promoted in moving process, thus promotion valve ball 52 makes valve ball 52 block oil leak hole 59, now the filler opening of solenoid valve is communicated with the oil outlet of solenoid valve, and the hydraulic oil in oil duct 1 enters into oil duct 2 12 through solenoid valve, and spring 3 54 is compressed in the process.
2, in oil duct 2 12, hydraulic oil promotes the valve body 41 of one-way valve, valve body 41 is moved up along valve pocket, in moving process, spring 2 46 forced compression is out of shape, until valve body 41 abuts on snubber 45, in the process that valve body 41 rises, hydraulic oil in oil duct 2 12 enters into one-way valve filler opening, promote steel ball 43 to move to the direction of spring 1, in the process of movement, spring 1 forced compression is out of shape, and now one-way valve filler opening is communicated with one-way valve oil outlet, and the hydraulic oil in oil duct 2 12 enters into oil duct 3 13 through one-way valve.
3, the pressure that piston 22 is subject to hydraulic oil moves down along piston rod 21, promoting exhaust valve 61 makes exhaust valve 61 open, as long as under the state that solenoid valve is in energising, piston 22 is in and keeps complete retracted position, in cycle of engine four-stroke, guarantee that a fixing gap opened by exhaust valve 61.
After engine brake is closed, solenoid valve power-off, spring 3 54 reset in solenoid valve promotes valve ball 52 makes valve ball 52 block the filler opening of solenoid valve, and now the oil outlet of solenoid valve is communicated with oil leak hole 59, and the hydraulic oil in oil duct 2 12 flows out through oil leak hole 59; The reduction of hydraulic fluid pressure in oil duct 2 12, spring 46 reset in one-way valve promotes valve body 41 and moves down, and in the process of movement, one-way valve oil outlet and oil duct 3 13 disconnect, and steel ball 43 blocks one-way valve filler opening under the effect of spring 1 elastic force; Along with the reduction of hydraulic fluid pressure in oil duct 3 13, piston 22 resets under the effect of spring 3 elastic force, and exhaust valve 61 resets under the elastic force effect of valve spring 63, and the fixed interval (FI) that exhaust valve 61 is opened is closed.
Specific embodiment described herein is only to the explanation for example of the present invention's spirit.Those skilled in the art can make various amendment or supplement or adopt similar mode to substitute to described specific embodiment, but can't depart from spirit of the present invention or surmount the scope that appended claims defines.
Although more employ housing 1 herein, oil duct 1, oil duct 2 12, oil duct 3 13, piston rod 21, piston 22, bar head 21a, bounding means 22a, ring-shaped step 22b, Steel Cable Baffle Ring 22c, tightening nut 23, spring 3, valve body 41, valve seat 42, steel ball 43, spring 1, snubber 45, spring 2 46, valve gap 47, circlip 48, valve body 1, valve ball 52, valve rod 53, spring 3 54, solenoid valve filler opening 55, solenoid valve oil outlet 56, holder 57, coil 58, oil leak hole 59, exhaust valve 61, limiting block is along 61a, engine cylinder cover 62, valve spring 63, term such as air valve bridge 64 grade, but do not get rid of the possibility using other term.These terms are used to be only used to describe and explain essence of the present invention more easily; The restriction that they are construed to any one additional is all contrary with spirit of the present invention.
Claims (6)
1. an engine brake, comprise housing (1), be located at the solenoid valve on housing (1) successively, one-way valve and piston assembly, the oil duct one (11) be communicated with solenoid valve filler opening (55) is also provided with in described housing (1), the oil duct three (13) that connected electromagnetic valve oil outlet (56) is communicated with one-way valve oil outlet with one end with the oil duct two (12) of one-way valve filler opening, described housing (1) is provided with a cavity, the other end of above-mentioned oil duct three (13) is communicated with described cavity and its joint is positioned at the bottom of described cavity, it is characterized in that, described piston assembly comprises the piston rod (21) be fixed on bottom cavity and the piston (22) be set on piston rod (21), described piston (22) and cavity are sealed and matched and this piston (22) can be axially outwards mobile along cavity under the effect of the middle hydraulic fluid pressure of oil duct three (13), the limit structure of limited piston (22) moving range is provided with between described piston rod (21) and piston (22), also be provided with between described piston rod (21) and piston (22) when making its return unit resetted after piston (22) moving displacement, be provided with one at the opening of described piston (22) and be set in bounding means (22a) in the form of a ring on piston rod (21), the opening of described piston (22) has a ring-shaped step (22b), above-mentioned bounding means (22a) is resisted against on this ring-shaped step (22b), the inner side place that described piston (22) is positioned at bounding means (22a) is provided with an annular groove, the Steel Cable Baffle Ring (22c) that one has opening is provided with in described annular groove, the opposite side of above-mentioned bounding means (22a) is resisted against on described Steel Cable Baffle Ring (22c), described housing (1) also offers a valve pocket, above-mentioned one-way valve is arranged in described valve pocket, this one-way valve comprises valve body (41), be located at the valve seat (42) in valve body (41) and steel ball (43), spring one (44) is also provided with between valve seat (42) and steel ball (43), the two ends of described spring one (44) act on valve seat (42) and steel ball (43) respectively, steel ball (43) blocking-up one-way valve filler opening described under the effect of this spring one (44) elastic force is communicated with one-way valve oil outlet, the opening of described valve pocket is provided with and can carries out spacing snubber (45) to one-way valve, spring two (46) is provided with between described snubber (45) and valve seat (42), one-way valve described under the elastic force effect of this spring two (46) has the trend moved inward along valve pocket, and the one-way valve oil outlet above-mentioned when described one-way valve moves inward along valve pocket and oil duct three (13) stagger, described solenoid valve comprises the valve body one (51) with filler opening and oil outlet, valve ball (52), valve rod (53) and spring three (54), valve ball (52) blocking-up solenoid valve filler opening (55) described under the effect of this spring three (54) elastic force is communicated with solenoid valve oil outlet (56), one end of described valve rod (53) acts on valve ball (52), its the other end is connected with a holder (57), described valve body one (51) is provided with the coil (58) being placed on holder (57) outside, holder (57) described in when described coil (58) is energized has the trend of promotion valve ball (52) movement, when described valve ball (52) is mobile, above-mentioned solenoid valve filler opening (55) is communicated with solenoid valve oil outlet (56).
2. engine brake according to claim 1, it is characterized in that, described limit structure comprises the bar head (21a) of piston rod (21) and described bar head (21a) is positioned at above-mentioned piston (22), the internal diameter of this bounding means (22a) is less than the external diameter of described bar head (21a), and the bar head (21a) described in when axially outwards mobile along cavity under the effect of described piston (22) at hydraulic fluid pressure can be resisted against on described bounding means (22a).
3. engine brake according to claim 2, it is characterized in that, described return unit is spring (3), and one end of this spring (3) is resisted against on bounding means (22a), and its other end is resisted against the end of above-mentioned bar head (21a).
4. engine brake according to claim 1, it is characterized in that, described snubber (45) cylindrically, and the valve gap (47) of one-way valve is provided with in the outside of this snubber (45), described valve gap (47) is positioned in described valve pocket by circlip (48).
5. engine brake according to claim 1, it is characterized in that, described valve body one (51) also offers oil leak hole (59), and above-mentioned spring three (54) is arranged in described oil leak hole (59).
6. the engine brake according to claim 1 or 2 or 3, it is characterized in that, the bottom of described cavity offers tapped through hole, above-mentioned piston rod (21) is fixed in this tapped through hole by screw thread, the shank portion of described piston rod (21) stretches out tapped through hole, and the part of stretching out tapped through hole at described piston rod (21) is arranged with tightening nut (23).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378295.2A CN102505976B (en) | 2011-11-24 | 2011-11-24 | Engine brake |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201110378295.2A CN102505976B (en) | 2011-11-24 | 2011-11-24 | Engine brake |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN102505976A CN102505976A (en) | 2012-06-20 |
| CN102505976B true CN102505976B (en) | 2015-10-21 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201110378295.2A Active CN102505976B (en) | 2011-11-24 | 2011-11-24 | Engine brake |
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| Country | Link |
|---|---|
| CN (1) | CN102505976B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2019145596A1 (en) * | 2018-01-26 | 2019-08-01 | Wärtsilä Finland Oy | A safety actuator, a safety actuator assembly and a reciprocating internal combustion piston engine having such a safety actuator assembly |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103244231B (en) * | 2013-05-03 | 2015-04-29 | 深圳市特尔佳科技股份有限公司 | Variable-pressure gas release braking method and variable-pressure gas release brake for implementing same |
| CN103437891B (en) * | 2013-09-11 | 2015-10-28 | 中国北方发动机研究所(天津) | Hydraulic type exhaust and brake system |
| CN103807029A (en) * | 2014-01-23 | 2014-05-21 | 中国北方发动机研究所(天津) | Vent valve type exhaust brake system |
| CN110863882A (en) * | 2019-12-20 | 2020-03-06 | 浙江九隆机械有限公司 | Brake |
| CN111120031B (en) * | 2019-12-28 | 2021-04-16 | 潍柴动力股份有限公司 | Auxiliary braking device for engine |
| CN112849691B (en) * | 2021-01-04 | 2022-09-27 | 郑州旭飞光电科技有限公司 | Glass packaging frame and glass packaging device |
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| US4706625A (en) * | 1986-08-15 | 1987-11-17 | The Jacobs Manufacturing Company | Engine retarder with reset auto-lash mechanism |
| EP0640751A2 (en) * | 1993-08-26 | 1995-03-01 | Jacobs Brake Technology Corporation | Electrically controlled timing adjustment fof compression release engine brakes |
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| CN202370606U (en) * | 2011-11-24 | 2012-08-08 | 浙江九隆机械有限公司 | Engine brake |
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| US7900597B2 (en) * | 2008-07-31 | 2011-03-08 | Pacbrake Company | Self-contained compression brakecontrol module for compression-release brakesystem of internal combustion engine |
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| US4706625A (en) * | 1986-08-15 | 1987-11-17 | The Jacobs Manufacturing Company | Engine retarder with reset auto-lash mechanism |
| EP0640751A2 (en) * | 1993-08-26 | 1995-03-01 | Jacobs Brake Technology Corporation | Electrically controlled timing adjustment fof compression release engine brakes |
| CN201661329U (en) * | 2010-04-14 | 2010-12-01 | 刘日升 | Engine hydraulic brake with normally opened control air gate |
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| WO2019145596A1 (en) * | 2018-01-26 | 2019-08-01 | Wärtsilä Finland Oy | A safety actuator, a safety actuator assembly and a reciprocating internal combustion piston engine having such a safety actuator assembly |
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|---|---|
| CN102505976A (en) | 2012-06-20 |
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