CN202611787U - Fixed-chain-type special rocker arm brake device - Google Patents
Fixed-chain-type special rocker arm brake device Download PDFInfo
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- CN202611787U CN202611787U CN 201220206966 CN201220206966U CN202611787U CN 202611787 U CN202611787 U CN 202611787U CN 201220206966 CN201220206966 CN 201220206966 CN 201220206966 U CN201220206966 U CN 201220206966U CN 202611787 U CN202611787 U CN 202611787U
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Abstract
The utility model discloses a fixed-chain-type special rocker arm brake device. The fixed-chain-type special rocker arm brake device comprises a conventional rocker arm of an engine, a special brake rocker arm and a brake valve gap adjusting mechanism, wherein the special brake rocker arm and the conventional rocker arm are arranged on a conventional rocker arm shaft of the engine in parallel; the brake valve gap adjusting mechanism is used for adjusting the relative positions of the special brake rocker arm and the conventional rocker arm; and one end of the special brake rocker arm is connected with a special brake cam, and the other end of the special brake rocker arm acts on the conventional rocker arm by a fixed-chain-type brake driving mechanism integrated in the special brake rocker arm. The fixed-chain-type brake driving mechanism contains a non-operation position and an operation position, wherein in the non-operation position, the special brake rocker arm and the conventional rocker arm do not act with each other; and in the operation position, the special brake rocker arm acts with the conventional rocker arm by the fixed-chain-type brake driving mechanism to form mechanical connection, and the movement of the special brake cam is transferred to the conventional rocker arm and an engine valve. The fixed-chain-type special rocker arm brake device disclosed by the utility model reduces the height, the size and the weight of a brake and improves the brake performance of an engine.
Description
Technical field:
The utility model relates to mechanical field, relates in particular to the valve actuation field of vehicle motor, particularly a kind of solid chain type dedicated rocker arm braking device that is used to produce engine braking.
Background technique:
In the prior art, the conventional valve actuator of vehicle motor comprises that the technology of using mechanical linkages to produce conventional valve motion knows as the people altogether, and it uses the history in existing more than 100 year.But owing to the extra demand to engine braking, increasing motor need increase the braking valve motion on the basis of conventional valve motion.Engine brake has become the device that commercial car (especially heavy truck more than 12 tons) motor must be joined gradually.
The engine braking technology also is widely known by the people.Only need temporarily to convert motor into compressor.Cut off fuel oil in the transfer process; When the approaching end of engine piston compression stroke, open valve; Allowing to be compressed gas (being air during braking) is released; The motor energy that pressurized gas absorbed in compression stroke can not turn back to the steam-cylinder piston and the bent axle of motor at expansion stroke subsequently, but dissipate through the exhaust and the radiation system of motor.Final result is slowing down of effective engine braking and car speed.
A precedent of engine braking apparatus is to be disclosed by the U. S. Patent No. 3220392 (nineteen sixty-five) that comings (Cummins) Mr. provides.Engine braking system passes to the exhaust valve that will open through oil hydraulic circuit with the machinery input.Be usually included in reciprocating main piston in the master piston bore on the oil hydraulic circuit; This to-and-fro motion comes from the Engine Mechanical input; Such as the shaking of injector rocker arm, the hydraulic way (hydraulic pressure connection) that moves through of main piston passes to the sub-piston on the oil hydraulic circuit, makes its to-and-fro motion in slave piston bore; Sub-piston acts on the exhaust valve directly or indirectly, produces the valve actuation of engine braking running.This type of engine braking system is the annex of overhead on motor.For this type of device is installed, between cylinder and valve gap, to add packing ring, therefore, increased height, weight and the cost of motor extraly.
Engine braking system is integrated in height, weight and the cost that can reduce motor in the existing parts of motor.U.S. commings engine (Cummins Engine) company discloses a kind of dedicated rocker arm braking device through U. S. Patent No. 5626116 (1997).Be mounted with a kind of hydraulic type braking drive organ in the special-purpose brake rocker arm, comprise a hydraulic piston.When not needing engine braking, the hydraulic piston in the special-purpose brake rocker arm is in retracted position, and special-purpose brake rocker arm separates with valve, and (losing) skipped in the motion of special-purpose brake cam; When the needs engine braking, the hydraulic piston in the special-purpose brake rocker arm is in extended position, and special-purpose brake rocker arm is given in two exhaust valves with the transmission of movement of special-purpose brake cam, produces engine braking.
Detroit ,u.s.a diesel oil (Detroit Diesel) company discloses a kind of pair of rocking arm braking device through U. S. Patent No. 5758620 (1998).One of them rocking arm is an injector rocker arm, and another rocking arm is an exhaust rocker arm.Be mounted with a kind of hydraulic type braking drive organ in the injector rocker arm, comprise a hydraulic piston.When not needing engine braking, the hydraulic piston in the injector rocker arm is in retracted position, and injector rocker arm separates with exhaust rocker arm, and (losing) skipped in the motion of injection cam; When the needs engine braking, the hydraulic piston in the injector rocker arm is in extended position, and injector rocker arm acts on the exhaust rocker arm, and the motion of injection cam is passed to two exhaust valves simultaneously, produces engine braking.
U.S. mark truck (Mack Trucks) company discloses a kind of two rocking arm braking device that produce the two stroke engine braking through U. S. Patent No. 6293428 (calendar year 2001).One of them rocking arm is special-purpose brake rocker arm, and another rocking arm is an exhaust rocker arm.Be mounted with a kind of hydraulic type braking drive organ in the special-purpose brake rocker arm, comprise a hydraulic piston.Exhaust rocker arm is oppressed special-purpose brake rocker arm from the top, special-purpose brake rocker arm compressing hydraulic piston, and hydraulic piston compressing valve bridge, the valve bridge acts on two valves.When not needing engine braking, the hydraulic piston in the special-purpose brake rocker arm is in retracted position, and (losing) skipped in the motion of special-purpose brake cam (contain two compressions and discharge boss); When the needs engine braking, the hydraulic piston in the special-purpose brake rocker arm is in extended position, and the transmission of movement of special-purpose brake cam is given valve bridge and two valves, produces engine braking.
Sweden's Volvo (Volvo) company is through U. S. Patent No. 6983725 (2006) and publication number US2010/0186710 (2010) discloses a kind of and the similarly two rocking arm braking device of U.S. mark truck (Mack Trucks) company.One of them rocking arm is special-purpose brake rocker arm, and another rocking arm is an exhaust rocker arm.Be mounted with a kind of hydraulic type braking drive organ in the exhaust rocker arm, comprise two hydraulic pistons, a main piston, a sub-piston.Special-purpose brake rocker arm is oppressed main piston from the top, and main piston connects the compressing sub-piston through hydraulic pressure, and sub-piston compressing exhaust rocker arm and valve bridge are opened two valves, produce engine braking.
The U.S. all can win (JVS) company and disclose another kind of pair of rocking arm braking device through U. S. Patent No. 7392772 (2008).One of them rocking arm is special-purpose brake rocker arm, and another rocking arm is an exhaust rocker arm.Be mounted with a kind of hydraulic type braking drive organ in the exhaust rocker arm, comprise a hydraulic piston.When not needing engine braking, the hydraulic piston in the exhaust rocker arm is in retracted position, and (losing) skipped in the motion of special-purpose brake cam; When the needs engine braking, the hydraulic piston in the exhaust rocker arm is in extended position, and special-purpose brake cam orders about special-purpose brake rocker arm and oppresses hydraulic piston from the top, hydraulic piston compressing exhaust rocker arm, and exhaust rocker arm is opened a valve, produces engine braking.
It should be noted that in the on-board engine applicating history in more than 100 years what conventional valve actuator adopted all is the connection and the driving of mechanical type or solid chain type (non-hydraulic type), the cam of motor is passed to valve, produce conventional valve motion.And applied in the world at present (introducing above comprising) engine braking apparatus all is connection or the driving of adopting hydraulic type, produces the braking valve motion.There are many shortcomings in the engine braking apparatus that hydraulic type drives, this with fluid characteristics such as intrinsic distortion and leakage relevant.The compressibility of hydraulic system or distortion and the valve lift of leaking when causing engine compresses to discharge reduce in a large number; The reducing of valve lift causes laterostigmatal brake load to increase; And the increase of brake load causes bigger hydraulic pressure distortion to reduce with valve lift on the valve, forms a kind of vicious circle.The hydraulic pressure distortion makes valve lift reduce along with the increase of engine speed, and is on the contrary with the trend that rotating speed increases with the desired valve lift of engine braking performance.In order to reduce the hydraulic pressure distortion, must use large diameter hydraulic piston, cause the increase of engine brake volume and weight.And oily stream need make enlarged bore piston stretch out for a long time or withdraw, and causes that braking system inertia is big, reaction is slow.In addition, hydraulic system also intrinsic " water hammer " and unstable characteristics such as " hydraulic jack " be subject to defective such as extraneous factor (like oil temperature, oil pressure, air content etc.) influence.
The model utility content:
The purpose of the utility model is to provide a kind of solid chain type dedicated rocker arm braking device; Described this solid chain type dedicated rocker arm braking device will solve engine braking apparatus in the existing technology and adopt hydraulic driving and exist distortion, leakages, reaction to reach the technical problem of the big and mechanism's heavy of braking system inertia slowly, eliminates the failure mode that intrinsic " water hammer " and " hydraulic jack " of hydraulic system cause and is subject to defective such as extraneous factor (like oily temperature, oil pressure, air content etc.) influence.
This solid chain type dedicated rocker arm braking device of the utility model is used for engine braking, and said motor comprises a conventional valve actuator; Said conventional valve actuator comprises a conventional cam, conventional pitman arm shaft, conventional rocking arm and engine valve; Be placed on the conventional pitman arm shaft to said conventional rocker arms roll formula, the conventional rocking arm that moves through of said conventional cam passes to said engine valve, produces the conventional valve motion of motor; It is characterized in that: said solid chain type dedicated rocker arm braking device comprises special-purpose brake cam and special-purpose brake rocker arm; Said special-purpose brake rocker arm is placed on the brake rocker arm axle rock typely, and an end of special-purpose brake rocker arm links to each other with said special-purpose brake cam, a braking action point on the other end of special-purpose brake rocker arm and the said conventional rocking arm near; Contain a kind of solid chain type braking drive organ in the said special-purpose brake rocker arm; Said solid chain type braking drive organ has off position and operating position, and at said off position, effect is eliminated between special-purpose brake rocker arm and the conventional rocking arm; At said operating position; Special-purpose brake rocker arm is through solid chain type braking drive organ and conventional rocking arm effect and form mechanical linkages, gives conventional rocking arm and engine valve with the transmission of movement of special-purpose brake cam, produces the braking valve motion of motor.
Further; The brake rocker arm axle of described solid chain type dedicated rocker arm braking device is special-purpose brake rocker arm axle or is said conventional pitman arm shaft; When said brake rocker arm axle and said conventional pitman arm shaft were same pitman arm shaft, special-purpose brake rocker arm and conventional rocking arm were placed on the conventional pitman arm shaft abreast.
Further; Described solid chain type dedicated rocker arm braking device also comprises braking valve clearance controlling mechanism, and said braking valve clearance controlling mechanism is used for regulating solid chain type braking drive organ and the relative position between the said conventional rocking arm in said special-purpose brake rocker arm or the special-purpose brake rocker arm.
Further; The solid chain type braking drive organ of described solid chain type dedicated rocker arm braking device comprises eccentric stiffener; Said eccentric stiffener moves between off position and operating position, and at the off position of eccentric stiffener, special-purpose brake rocker arm and conventional rocking arm effect are eliminated; Operating position at eccentric stiffener; Special-purpose brake rocker arm and conventional rocking arm effect also form mechanical linkages between special-purpose brake cam and conventional rocking arm, give engine valve with the transmission of movement of special-purpose brake cam, produce the braking valve motion of motor.
Further; The solid chain type braking drive organ of described solid chain type dedicated rocker arm braking device comprises elbow-bar mechanism; Said elbow-bar mechanism is moved between off position and operating position, and at the off position of elbow-bar mechanism, special-purpose brake rocker arm and conventional rocking arm effect are eliminated; Operating position in elbow-bar mechanism; Special-purpose brake rocker arm and conventional rocking arm effect also form mechanical linkages between special-purpose brake cam and conventional rocking arm, give engine valve with the transmission of movement of special-purpose brake cam, produce the braking valve motion of motor.
Further, the special-purpose brake cam of described solid chain type dedicated rocker arm braking device comprises that compression discharges the braking boss.
Further, the special-purpose brake cam of described solid chain type dedicated rocker arm braking device comprises the exhaust gas recirculatioon boss.
Further, the special-purpose brake cam of described solid chain type dedicated rocker arm braking device comprises that simultaneously compression discharges braking boss and exhaust gas recirculatioon boss.
Further, have phase difference between the open phase of the braking valve motion of described solid chain type dedicated rocker arm braking device and the open phase of said conventional valve motion, the lift of braking valve motion is less than the lift of conventional valve motion.
Further, described solid chain type dedicated rocker arm braking device also comprises brake spring, and said brake spring is biased in the position of avoiding impacting adjacent component with described special-purpose brake rocker arm.
The working principle of the utility model is: when needs motor during from routine work state exchange to engine braking state; The braking control mechanism of motor is open-minded; Solid chain type braking drive organ in the special-purpose brake rocker arm changes to operating position from off position, and special-purpose brake rocker arm is through solid chain type braking drive organ and conventional rocking arm effect and form mechanical linkages.The motion of special-purpose brake cam through special-purpose brake rocker arm and solid chain type braking drive organ, is delivered on conventional rocking arm and the engine valve, produces the braking valve motion that is used for engine braking.When not needing engine braking; The braking control mechanism of motor cuts out; Gu the chain type braking drive organ is got back to off position from operating position, special-purpose brake rocker arm and conventional rocking arm are inoperative, and the motion of special-purpose brake cam can't be delivered on the engine valve; Motor breaks away from the braking running, gets back to the routine work state.
The utility model is compared with prior art, and its effect is actively with tangible.The utility model has reduced volume, weight and the inertia of engine braking mechanism; Eliminated the defectives such as distortion and leakage and failure modes such as " jack " of hydraulic type braking system, improved the braking ability of motor, reduced the influence of engine braking running the engine ignition running.
Description of drawings:
Fig. 1 is the schematic representation of position relation between special-purpose brake rocker arm and the conventional rocking arm among the embodiment of solid chain type dedicated rocker arm braking device of the utility model.
Fig. 2 is a plan view embodiment illustrated in fig. 1.
Fig. 3 is the schematic representation of the conventional valve actuator of motor among the embodiment of solid chain type dedicated rocker arm braking device of the utility model.
Fig. 4 is an embodiment's the structural representation of the solid chain type dedicated rocker arm braking device of the utility model.
Fig. 5 is another embodiment's the structural representation of the solid chain type dedicated rocker arm braking device of the utility model.
Fig. 6 is the schematic representation of the conventional valve motion curve of motor and engine braking valve motion curve among the embodiment of solid chain type dedicated rocker arm braking device of the utility model.
Embodiment:
Embodiment 1:
Fig. 1, Fig. 2, Fig. 3, Fig. 4 and Fig. 6 are used to describe embodiment one.
As depicted in figs. 1 and 2, the conventional rocking arm 210 and the special-purpose brake rocker arm 2102 of motor are placed on the conventional pitman arm shaft 205 of motor abreast.In the present embodiment, be used to settle the brake rocker arm axle of special-purpose brake rocker arm 2102 to be the same axis (special-purpose brake rocker arm 2102 also can be placed in different pitman arm shafts, on special-purpose brake rocker arm axle) with conventional pitman arm shaft 205.
As shown in Figure 3, the conventional valve actuator 200 of motor comprises conventional cam 230, tappet roller 235, conventional rocking arm 210, conventional valve clearance regulating system and engine valve 300.Conventional valve clearance regulating system comprises adjusting screw 110, tightens up nut 105 and resembles foot pad 114.Valve 300 is biased on the valve seat 320 of engine cylinder-body 500 by the valve spring 310 of motor, stops gas between engine cylinder and outlet pipe 600, to flow.Conventional rocking arm 210 is installed on the conventional pitman arm shaft 205 rock typely; Tappet roller 235 is arranged on an end of conventional rocking arm 210; The other end of conventional rocking arm 210 links to each other with the valve 300 of motor; Conventional cam 230 move through conventional rocking arm 210, pass to valve 300, it is is periodically opened and closed.Conventional cam 230 has a conventional boss 220 at interior basic circle more than 225, produce the conventional valve lift curve (see Fig. 6 2202) of motor, and the routine (igniting) that is used for motor operates.
Like Fig. 1,2, shown in 3 and 4, be provided with braking action point 1002 on the conventional rocking arm 210, as the point of contact or the working position of special-purpose brake rocker arm 2102 (or solid chain type braking drive organ 100 wherein) on exhaust rocker arm 210.Braking action point 1002 can be the part of conventional rocking arm 210, also can be the separate parts that is assembled on the conventional rocking arm 210.
As shown in Figure 4; The solid chain type dedicated rocker arm braking device (engine braking valve actuator) 2002 of present embodiment comprises special-purpose brake cam 2302 and special-purpose brake rocker arm 2102; Special-purpose brake rocker arm 2102 is placed on the brake rocker arm axle (present embodiment and conventional pitman arm shaft 205 are shared) rock typely; One end of special-purpose brake rocker arm 2102 comprises special-purpose brake cam follower 2352 and is biased on the special-purpose brake cam 2302 by brake spring 198, the other end of special-purpose brake rocker arm 2102 comprise braking valve clearance controlling mechanism and with exhaust rocker arm 210 (the braking action point 1002 on the exhaust rocker arm) near.Contain solid chain type braking drive organ 100 in the special-purpose brake rocker arm 2102.The motion of special-purpose brake cam 2302 acts on the braking action point 1002 on the conventional rocking arm 210 by special-purpose brake rocker arm 2102 through solid chain type braking drive organ 100, passes to conventional rocking arm 210 and engine valve 300.Two braking boss on the special-purpose brake cam 2302 of present embodiment are respectively that compression discharges braking boss 232 and exhaust gas recirculatioon boss 233 (also can only use a boss, discharge braking boss 232 like compression).Braking valve clearance controlling mechanism comprises adjusting screw 1102, tightens up nut 1052 and resembles foot pad 1142.Braking valve clearance controlling mechanism is used for regulating the relative position between special-purpose brake rocker arm 2102 and the conventional rocking arm 210.
The solid chain type braking drive organ 100 of present embodiment is an eccentric stiffener, comprises eccentric swing arm sleeve 188 and axle sleeve drive unit.Eccentric swing arm sleeve 188 is positioned between brake rocker arm axle 205 (present embodiment brake rocker arm axle is identical with conventional pitman arm shaft, but also can be another root pitman arm shaft) and the special-purpose brake rocker arm 2102.One protruding 142 (this convexity also can be a separate part that is assemblied on the excentric sleeve) are arranged on the eccentric swing arm sleeve 188, place in the grooving 137 of special-purpose brake rocker arm 2102 centres.The axle sleeve drive unit is a hydraulic driving system, comprise braking control mechanism (not shown), be positioned at special-purpose brake rocker arm 2102 piston hole 260 driven plunger 164 and be communicated with both fluid network.Fluid network comprises fluid passage 213 and the fluid passage 214 in the special-purpose brake rocker arm 2102 in axial fluid passage 211 and radial fluid passages 212, the eccentric swing arm sleeve 188 in the conventional pitman arm shaft 205.Convexity 142 on the eccentric swing arm sleeve 188 is between the spring seat of driven plunger 164 and return spring 156.Eccentric swing arm sleeve 188 rotates on conventional pitman arm shaft 205, makes eccentric stiffener 100 between off position and operating position, move.At the off position (like Fig. 4) of eccentric stiffener 100, the braking action point on special-purpose brake rocker arm 2102 (braking resembles foot pad 1142) and the conventional rocking arm was opened in 1002 minutes, and its gap is 132.At this moment, special-purpose brake rocker arm 2102 and conventional rocking arm 210 are inoperative, and the motion of brake cam 2302 is skipped (losing) owing to gap 132, can not pass to conventional rocking arm 210 and engine valve 300; At the operating position of eccentric stiffener 100, special-purpose brake rocker arm 2102 (braking resembles foot pad 1142) is drawn close with the braking action point 1002 on the conventional rocking arm and is contacted, and eliminates gap 132.At this moment; Form mechanical linkages between special-purpose brake rocker arm 2102 and the conventional rocking arm 210; Special-purpose brake cam 2302 move through eccentric stiffener 100 and special-purpose brake rocker arm 2102, pass to conventional rocking arm 210 and valve 300, produce the braking valve motion of motor.
Embodiment 2:
As shown in Figure 5; Solid chain type braking drive organ 100 in the special-purpose brake rocker arm 2102 adopts elbow-bar mechanism, comprises toggle link (connecting rod) and guiding and stop bit mechanism between brake piston 160, driven plunger 164, braking valve clearance controlling mechanism and the brake piston 160.Guiding and stop bit mechanism are used for controlling the motion and the position of elbow-bar mechanism 100.When elbow-bar mechanism 100 is moved between off position and operating position; Guiding makes the center line of driven plunger 164, brake piston 160 and toggle link (connecting rod) in a plane, move all the time with stop bit mechanism, and the stroke of restriction driven plunger 164 and brake piston 160.The off position of elbow-bar mechanism 100 and operating position are corresponding to routine work (igniting) state of motor and the braking state of motor.Braking valve clearance controlling mechanism comprises adjusting screw 1102, tightens up nut, toggle link and brake piston 160 in the elbow-bar mechanism 100.Braking valve clearance controlling mechanism is used for regulating solid chain type braking drive organ (elbow-bar mechanism) 100 and the relative position between the said conventional rocking arm 210 in the special-purpose brake rocker arm 210.
When needs motor during from routine work state exchange to engine braking state; Engine braking control mechanism (not shown) is opened fuel feeding; Machine oil is through the brake fluid networking; Comprise fluid passage 211, radial hole 212, the interior fluid passage 213 and 214 of rocking arm in the pitman arm shaft, flow to elbow-bar mechanism 100.Oil pressure overcomes brake spring and the load of the return spring 156 on the right driven plunger 162 on the vertical piston 160, and left driven plunger 164 is pushed away to the right, and toggle link (or being connecting rod) is become vertically from inclination.Motion corresponding to toggle link; Vertically piston 160 reaches operating position downwards from retracted position; Eliminated the gap 132 between the braking action point 1002 on vertical piston 160 and the conventional rocking arm 210, special-purpose brake rocker arm 2102 is through forming mechanical linkages between elbow-bar mechanism 100 and the conventional rocking arm 210, and the motion of special-purpose brake cam 2302 is by special-purpose brake rocker arm 2102 and elbow-bar mechanism 100; Pass to conventional rocking arm 210 and valve 300, produce the braking valve motion of motor.
When not needing engine braking; Engine braking control mechanism (not shown) is closed draining, and left driven plunger 164 does not receive oil pressure, under the effect of return spring 156 to moving to left; Toggle link is from vertically becoming again to tilting; Vertically piston 160 upwards is withdrawn into off position from extended position, and forms gap 132 between the braking action point on the conventional rocking arm 210 1002, and special-purpose brake rocker arm 2102 and conventional rocking arm 210 are inoperative; The motion of special-purpose brake cam 2302 is skipped (losing) owing to gap 132, can not pass to conventional rocking arm 210 and valve 300.
Fig. 6 is the schematic representation of conventional valve motion curve 2202 and engine braking valve motion curve 2322 and 2332 among the embodiment of solid chain type dedicated rocker arm braking device of the utility model.Conventional boss 220 on the interior basic circle 225 of conventional valve motion curve 2202 and Fig. 3 cam 230 is corresponding, by conventional valve actuator 200 generations.Braking valve motion curve 2322 with 2332 with Fig. 4 and Fig. 5 in two braking boss 232 (compression discharges the braking boss) on the interior basic circle 2252 of special-purpose brake cam 2302 corresponding with 233 (exhaust gas recirculatioon boss), by special-purpose brake rocker arm 2102 through conventional rocking arm 210 of chain type braking drive organ 100 drivings and engine valve 300 generations admittedly.
Conventional valve motion curve 2202 is what to separate with braking valve motion curve 2322 and 2332 among Fig. 6, that is to say that the motion phase of conventional rocking arm 210 and brake rocker arm 2102 staggers.The height of braking valve motion curve 2322 and 2332 is lower than conventional valve motion curve 2202.
Above-mentioned explanation has comprised a lot of concrete mode of executions, and this should not be regarded as the restriction to the utility model scope, but as some concrete illustrations of representing the utility model, many other differentiation all might therefrom produce.For instance, the solid chain type dedicated rocker arm braking device that shows here not only can be used to produce the braking valve motion of engine braking, also can be used to produce other valve motion such as exhaust gas recirculation.
In addition, the solid chain type dedicated rocker arm braking device that shows here not only can be used for overhead cam engine, also can be used for push rod/tubular type motor; Not only can be used for driving exhaust valve, also can be used to drive intake valve; Not only can be used for opening single valve, also can be used to open dual valve.
Also have, the braking action point 1002 on the conventional rocking arm 210 can be at the different parts of conventional rocking arm 210.Because brake rocker arm 2102 can link to each other with conventional rocking arm 210 or interacts through different mode (such as from the top).
In addition, the solid chain type braking drive organ 100 of other form also is applicable to the solid chain type dedicated rocker arm braking device of the utility model.
Therefore, the scope of the utility model should not decided by above-mentioned concrete illustration, but is decided by affiliated claim and the suitable right of law thereof.
Claims (10)
1. a solid chain type dedicated rocker arm braking device is used for engine braking, and said motor comprises a conventional valve actuator; Said conventional valve actuator comprises a conventional cam, conventional pitman arm shaft, conventional rocking arm and engine valve; Be placed on the conventional pitman arm shaft to said conventional rocker arms roll formula, the conventional rocking arm that moves through of said conventional cam passes to said engine valve, produces the conventional valve motion of motor; It is characterized in that: said solid chain type dedicated rocker arm braking device comprises special-purpose brake cam and special-purpose brake rocker arm; Said special-purpose brake rocker arm is placed on the brake rocker arm axle rock typely, and an end of special-purpose brake rocker arm links to each other with said special-purpose brake cam, a braking action point on the other end of special-purpose brake rocker arm and the said conventional rocking arm near; Contain a kind of solid chain type braking drive organ in the said special-purpose brake rocker arm; Said solid chain type braking drive organ has off position and operating position, and at said off position, effect is eliminated between special-purpose brake rocker arm and the conventional rocking arm; At said operating position; Special-purpose brake rocker arm is through solid chain type braking drive organ and conventional rocking arm effect and form mechanical linkages, gives conventional rocking arm and engine valve with the transmission of movement of special-purpose brake cam, produces the braking valve motion of motor.
2. solid chain type dedicated rocker arm braking device as claimed in claim 1; It is characterized in that: described brake rocker arm axle is special-purpose brake rocker arm axle or is said conventional pitman arm shaft; When said brake rocker arm axle and said conventional pitman arm shaft were same pitman arm shaft, said special-purpose brake rocker arm and conventional rocking arm were placed on the said conventional pitman arm shaft abreast.
3. solid chain type dedicated rocker arm braking device as claimed in claim 1; It is characterized in that: also comprise braking valve clearance controlling mechanism, said braking valve clearance controlling mechanism is used for regulating solid chain type braking drive organ and the relative position between the said conventional rocking arm in said special-purpose brake rocker arm or the special-purpose brake rocker arm.
4. solid chain type dedicated rocker arm braking device as claimed in claim 1; It is characterized in that: said solid chain type braking drive organ comprises eccentric stiffener; Said eccentric stiffener moves between off position and operating position; At the off position of eccentric stiffener, special-purpose brake rocker arm and conventional rocking arm effect are eliminated; At the operating position of eccentric stiffener, special-purpose brake rocker arm and conventional rocking arm effect also form mechanical linkages between special-purpose brake cam and conventional rocking arm, give engine valve with the transmission of movement of special-purpose brake cam, produce the braking valve motion of motor.
5. solid chain type dedicated rocker arm braking device as claimed in claim 1; It is characterized in that: said solid chain type braking drive organ comprises elbow-bar mechanism; Said elbow-bar mechanism is moved between off position and operating position, and at the off position of elbow-bar mechanism, special-purpose brake rocker arm and conventional rocking arm effect are eliminated; Operating position in elbow-bar mechanism; Special-purpose brake rocker arm and conventional rocking arm effect also form mechanical linkages between special-purpose brake cam and conventional rocking arm, give engine valve with the transmission of movement of special-purpose brake cam, produce the braking valve motion of motor.
6. solid chain type dedicated rocker arm braking device as claimed in claim 1 is characterized in that: said special-purpose brake cam comprises that compression discharges the braking boss.
7. solid chain type dedicated rocker arm braking device as claimed in claim 1, it is characterized in that: said special-purpose brake cam comprises the exhaust gas recirculatioon boss.
8. solid chain type dedicated rocker arm braking device as claimed in claim 1 is characterized in that: said special-purpose brake cam comprises that simultaneously compression discharges braking boss and exhaust gas recirculatioon boss.
9. solid chain type dedicated rocker arm braking device as claimed in claim 1; It is characterized in that: have phase difference between the open phase of said braking valve motion and the open phase of said conventional valve motion, the lift of braking valve motion is less than the lift of conventional valve motion.
10. solid chain type dedicated rocker arm braking device as claimed in claim 1, it is characterized in that: also comprise brake spring, said brake spring is biased in the position of avoiding impacting adjacent component with described special-purpose brake rocker arm.
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| CN 201220206966 CN202611787U (en) | 2012-05-09 | 2012-05-09 | Fixed-chain-type special rocker arm brake device |
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| CN 201220206966 CN202611787U (en) | 2012-05-09 | 2012-05-09 | Fixed-chain-type special rocker arm brake device |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN103388504A (en) * | 2012-05-09 | 2013-11-13 | 上海尤顺汽车部件有限公司 | Special fixed chain type rocker arm braking device |
| CN103912336A (en) * | 2013-01-09 | 2014-07-09 | 上海尤顺汽车部件有限公司 | Single valve opened engine auxiliary valve actuator |
| CN104153836A (en) * | 2013-05-13 | 2014-11-19 | 上海尤顺汽车部件有限公司 | Engine auxiliary valve driving system adopting mechanical starting and bearing |
| CN104819022A (en) * | 2015-03-23 | 2015-08-05 | 上海尤顺汽车部件有限公司 | Cold start mechanism for engine |
| CN105179091A (en) * | 2015-08-10 | 2015-12-23 | 莫嘉林 | Compression type speed reducing system for automobile engine |
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2012
- 2012-05-09 CN CN 201220206966 patent/CN202611787U/en not_active Withdrawn - After Issue
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103388504A (en) * | 2012-05-09 | 2013-11-13 | 上海尤顺汽车部件有限公司 | Special fixed chain type rocker arm braking device |
| CN103388504B (en) * | 2012-05-09 | 2016-03-02 | 上海尤顺汽车部件有限公司 | A kind of solid chain type dedicated rocker arm braking device |
| CN103912336A (en) * | 2013-01-09 | 2014-07-09 | 上海尤顺汽车部件有限公司 | Single valve opened engine auxiliary valve actuator |
| CN104153836A (en) * | 2013-05-13 | 2014-11-19 | 上海尤顺汽车部件有限公司 | Engine auxiliary valve driving system adopting mechanical starting and bearing |
| CN104153836B (en) * | 2013-05-13 | 2017-02-08 | 上海尤顺汽车部件有限公司 | Engine auxiliary valve driving system adopting mechanical starting and bearing |
| CN104819022A (en) * | 2015-03-23 | 2015-08-05 | 上海尤顺汽车部件有限公司 | Cold start mechanism for engine |
| CN104819022B (en) * | 2015-03-23 | 2023-09-05 | 上海尤顺汽车技术有限公司 | Cold starting mechanism of engine |
| CN105179091A (en) * | 2015-08-10 | 2015-12-23 | 莫嘉林 | Compression type speed reducing system for automobile engine |
| CN105179091B (en) * | 2015-08-10 | 2017-12-19 | 莫嘉林 | The slow system of automobile engine compression |
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