CN103075219A - Engine structure for improving protrusion angle of air inlet camshaft - Google Patents
Engine structure for improving protrusion angle of air inlet camshaft Download PDFInfo
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- CN103075219A CN103075219A CN2013100159193A CN201310015919A CN103075219A CN 103075219 A CN103075219 A CN 103075219A CN 2013100159193 A CN2013100159193 A CN 2013100159193A CN 201310015919 A CN201310015919 A CN 201310015919A CN 103075219 A CN103075219 A CN 103075219A
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- admission cam
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- 230000008859 change Effects 0.000 claims description 4
- 238000007906 compression Methods 0.000 abstract description 17
- 230000006835 compression Effects 0.000 abstract description 15
- 238000002485 combustion reaction Methods 0.000 abstract description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 230000003111 delayed effect Effects 0.000 abstract 1
- 238000000034 method Methods 0.000 description 23
- 230000008569 process Effects 0.000 description 6
- 239000000446 fuel Substances 0.000 description 5
- 238000010304 firing Methods 0.000 description 3
- 230000008901 benefit Effects 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000010438 heat treatment Methods 0.000 description 2
- 230000006872 improvement Effects 0.000 description 2
- 239000000203 mixture Substances 0.000 description 2
- 230000007306 turnover Effects 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 239000000498 cooling water Substances 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000002283 diesel fuel Substances 0.000 description 1
- 239000002360 explosive Substances 0.000 description 1
- 230000030279 gene silencing Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000029058 respiratory gaseous exchange Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 239000007921 spray Substances 0.000 description 1
- 238000010626 work up procedure Methods 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/14—Tappets; Push rods
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/02—Valve drive
- F01L1/04—Valve drive by means of cams, camshafts, cam discs, eccentrics or the like
- F01L1/08—Shape of cams
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/181—Centre pivot rocking arms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L1/00—Valve-gear or valve arrangements, e.g. lift-valve gear
- F01L1/12—Transmitting gear between valve drive and valve
- F01L1/18—Rocking arms or levers
- F01L1/185—Overhead end-pivot rocking arms
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F01—MACHINES OR ENGINES IN GENERAL; ENGINE PLANTS IN GENERAL; STEAM ENGINES
- F01L—CYCLICALLY OPERATING VALVES FOR MACHINES OR ENGINES
- F01L13/00—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations
- F01L13/0015—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque
- F01L2013/0089—Modifications of valve-gear to facilitate reversing, braking, starting, changing compression ratio, or other specific operations for optimising engine performances by modifying valve lift according to various working parameters, e.g. rotational speed, load, torque with means for delaying valve closing
Abstract
The invention discloses an engine structure for improving protrusion angle of an air inlet camshaft. The engine structure comprises tappets, wherein the top end of each tappet is provided with an air inlet camshaft, each air inlet camshaft comprises a fixing part, each fixing part is provided with a protrusion part extending towards the front end, and the center of each fixing part is used as a center of circle. The expansion angle of each protrusion part is the protrusion angle alpha of each air inlet camshaft, the value range of the protrusion angle alpha is greater than or equal to 110 degrees but is smaller than or equal to 170 degrees, or the value range of the protrusion angle alpha is greater than or equal to 10 degrees but is smaller than or equal to 75 degrees, and the calculation of the protrusion angle alpha is based on the calculation of the engine piston from a top dead center. Through the matching of a novel belt-type tappet in running, the closing of an air inlet valve is delayed or advanced, the distance of the piston being compressed up at the point to the top dead center is used as the compression ratio to design a combustion chamber, and the expansion working capacity for pushing the piston is greater than the compression capacity. The heat working is fully performed, and the conversion efficiency of the engine heat is improved.
Description
Technical field
The present invention relates to the four stroke engine technical field, the especially a kind of admission cam shaft at air inlet protrusion angle and tappet and rocker structure that is complementary with admission cam shaft of changing.
Background technique
The protrusion angle of conventional art admission cam shaft is shown in Fig. 1 a and Fig. 1 b, the angular dimension that the admission cam shaft that present motor is used protrudes angle a has two kinds of situations, the first situation, contain piston and calculate the protrusion angle in budc, the about 125 degree angles of its size, the second situation is just calculated the protrusion angle by piston at top dead center, and its size is about 110 degree angles.It is the work capacity of motor to be converted as far as possible to power output.
Summary of the invention
The object of the present invention is to provide a kind of admission cam shaft that changes to protrude the angle or also cooperate simultaneously the tappet of band level to be applied to engine structure, thereby improve heating power conversion efficiency, the motor of environmental protection fuel saving.
For realizing above purpose, the present invention has taked following technological scheme: a kind of engine structure that changes the protrusion angle of admission cam shaft, include tappet, be provided with admission cam shaft on the tappet top, admission cam shaft comprises fixing part, the extension of fixing part forward end is provided with bump, take the fixing part center as the center of circle, the angle that bump opens is the protrusion angle a of admission cam shaft, the span of described protrusion angle a is more than or equal to 110 degree angles and less than or equal to 170 degree angles, the span of perhaps protruding angle a is that the basis of this protrusion angle a is to play calculating by engine piston at top dead center more than or equal to 10 degree angles and less than or equal to 75 degree angles.
The sidewall of described fixing part is the circular arc sidewall, and the sidewall of described bump is the arc surfaced sidewall, and circular arc sidewall and arc surfaced sidewall jointing place are concave arc surface, and arc surfaced sidewall and bump front-end face jointing place are cambered surface.
The invention provides another kind of structure, a kind of engine structure that changes the protrusion angle of admission cam shaft, include tappet, be provided with admission cam shaft on the tappet top, admission cam shaft comprises fixing part, the extension of fixing part forward end is provided with bump, take the fixing part center as the center of circle, the angle that bump opens is the protrusion angle a of admission cam shaft, the span of described protrusion angle a is more than or equal to 110 degree angles and less than or equal to 170 degree angles, the span of perhaps protruding angle a is that the basis of this protrusion angle a is to play calculating by engine piston at top dead center more than or equal to 10 degree angles and less than or equal to 75 degree angles; The top of described tappet is provided with the stepped platform, and described admission cam shaft side is resisted against on the described stepped platform.
The upper surface of described stepped platform and one side joining part are the step cambered surface, the sidewall of described fixing part is the circular arc sidewall, the sidewall of described bump is the arc surfaced sidewall, circular arc sidewall and arc surfaced sidewall jointing place are concave arc surface, arc surfaced sidewall and bump front-end face jointing place are cambered surface, and described concave arc surface and step cambered surface connect; Described cambered surface and tappet end face connect.
The inner recessed sky of described stepped platform.Help to alleviate the weight of tappet.
Baffle plate is equipped with in both sides at described stepped platform, and baffle plate keeps off in the admission cam shaft both sides.Rotation occurs in the time of can preventing the operation of tappet and admission cam shaft, keep tappet to work up and down.
A kind of engine structure that changes the protrusion angle of admission cam shaft, include rocking arm; wear positioning shaft on the rocking arm; rocking arm one end connects the fixed end of air intake valve; the other end below and admission cam shaft against; admission cam shaft comprises fixing part; the fixing part forward end is extended and is provided with bump; take the fixing part center as the center of circle; the angle that bump opens is the protrusion angle a of admission cam shaft; the span of described protrusion angle a be more than or equal to 110 degree angles and less than or equal to 170 degree angles, and the span of perhaps protruding angle a is for spending angles more than or equal to 10 degree angles and less than or equal to 75, and the basis of this protrusion angle a is to play calculating by engine piston at top dead center.
The sidewall of described fixing part is the circular arc sidewall, and the sidewall of described bump is the arc surfaced sidewall, and circular arc sidewall and arc surfaced sidewall jointing place are concave arc surface, and when admission cam shaft rotated, concave arc surface and bump front-end face were conflicted respectively below the rocking arm end.
Below described rocking arm end, also be provided with boss, the corner of boss is the arc surfaced angle, and the sidewall of described fixing part is the circular arc sidewall, and the sidewall of described bump is the arc surfaced sidewall, circular arc sidewall and arc surfaced sidewall jointing place are concave arc surface, and described concave arc surface is conflicted on a jiao of boss.
A kind of engine structure that changes the protrusion angle of admission cam shaft, include rocking arm; rocking arm one end connects the fixed end of air intake valve; be equipped with positioning shaft on the other end; described rocking arm surface is provided with the ladder step; the corner of ladder step is the arc surfaced angle; described admission cam shaft comprises fixing part; the fixing part forward end is extended and is provided with bump; take the fixing part center as the center of circle; the angle that bump opens is the protrusion angle a of admission cam shaft; the span of described protrusion angle a be more than or equal to 110 degree angles and less than or equal to 170 degree angles; the span of perhaps protruding angle a is for spending angles more than or equal to 10 degree angles and less than or equal to 75, and the basis of this protrusion angle a is to play calculating by engine piston at top dead center; The sidewall of described fixing part is the circular arc sidewall, and the sidewall of described bump is the arc surfaced sidewall, and circular arc sidewall and arc surfaced sidewall jointing place are concave arc surface, and described concave arc surface is conflicted on a jiao of ladder step.
The present invention compared with prior art has following advantage: strengthen the new admission cam shaft of protrusion angle design that the four stroke engine admission cam shaft protrudes the angle or reduces camshaft.Be equipped with the tappet operation of new shape band level again, thereby reach postponement or do sth. in advance closing of air intake valve, piston is done compression ratio designed combustion chamber with this to the up distance that is compressed to top dead center, makes pushing piston expand the acting volume greater than minimum cylinder volume.Brightness is fully sent out in the heat acting, improved the conversion efficiency of motor heating power.
Description of drawings
Fig. 1 a is prior art engine charge camshaft floor map;
Fig. 1 b is the stereogram of Fig. 1 a;
Fig. 2 a is that motor of the present invention strengthens admission cam shaft protrusion angle schematic representation ();
Fig. 2 b is the stereogram of Fig. 2 a;
Fig. 2 c is that motor of the present invention reduces admission cam shaft protrusion angle schematic representation;
Fig. 2 d is Fig. 2 c stereogram;
Fig. 2 e is that motor of the present invention strengthens admission cam shaft protrusion angle schematic representation (two);
Fig. 2 f is the stereogram of Fig. 2 e;
Fig. 2 g is for protruding the admission cam shaft protrusion angle plane schematic representation that angle a is 10 degree angles;
Fig. 2 h is the stereogram of Fig. 2 g;
Fig. 3 a arrives engine structure working procedure schematic representation with the admission cam shaft that the angle is protruded in the increasing of Fig. 2 f with traditional tappet fit applications;
Fig. 3 b arrives engine structure working procedure schematic representation with the admission cam shaft that the angle is protruded in the increasing of Fig. 2 b with traditional tappet fit applications;
Fig. 3 c protrudes the air inlet that reduces of Fig. 2 d the admission cam shaft at angle and arrives engine structure working procedure schematic representation with traditional tappet fit applications;
Fig. 4 a is stepped platform enlarged diagram (the inner recessed sky of stepped platform);
Fig. 4 b is schematic representation that the camshaft of Fig. 2 f is combined with stepped platform and tappet (the recessed sky in stepped platform inside);
Fig. 4 c is schematic representation (stepped platform inside is solid) that the camshaft of Fig. 2 f is combined with stepped platform and tappet;
Fig. 4 d is with the baffle plate schematic representation with the stepped platform among Fig. 4 c;
Fig. 4 e is with the baffle plate schematic representation with the stepped platform among Fig. 4 b;
Fig. 4 f is the camshaft schematic representation that combines with the tappet of stepped platform and another kind of shape;
Fig. 4 g is schematic representation that the camshaft of Fig. 2 d is combined with stepped platform and tappet (the recessed sky in stepped platform inside);
Fig. 4 h is the tappet structural representation of another kind of shape among Fig. 4 g;
Fig. 5 protrudes the increasing of Fig. 2 b the admission cam shaft at angle and improves the tappet fit applications to engine structure working procedure schematic representation;
Fig. 6 a is the admission cam shaft schematic representation of another wide-angle;
Fig. 6 b is with the admission cam shaft of Fig. 6 a and improves the tappet fit applications to engine structure working procedure schematic representation ();
Fig. 6 c arrives engine structure working procedure schematic representation (two) with the admission cam shaft of Fig. 6 a with improvement tappet fit applications;
Fig. 6 d arrives engine structure working procedure schematic representation (three) with the admission cam shaft of Fig. 6 a with improvement tappet fit applications;
Fig. 7 a is with the admission cam shaft of Fig. 2 d and improves the tappet fit applications to engine structure working procedure schematic representation ();
Fig. 7 b is with the admission cam shaft of Fig. 2 d and improves the tappet fit applications to engine structure working procedure schematic representation (two);
Fig. 7 c is with the admission cam shaft of Fig. 2 d and improves the tappet fit applications to engine structure working procedure schematic representation (three);
Fig. 8 a is with admission cam shaft and rocking arm linkage structure schematic representation ();
Fig. 8 b is with admission cam shaft and rocking arm linkage structure schematic representation (two);
Fig. 8 c is with admission cam shaft and rocking arm linkage structure schematic representation (three);
Fig. 8 d is with admission cam shaft and rocking arm linkage structure schematic representation (four);
Fig. 8 e is with admission cam shaft and rocking arm linkage structure schematic representation (five).
Embodiment
Below in conjunction with the drawings and specific embodiments content of the present invention is described in further details.
Embodiment one:
See also Fig. 3 a, this embodiment is for protruding angle a one wide-angle example, a kind of engine structure that changes the protrusion angle of admission cam shaft, the tappet 2 that comprises prior art, be provided with admission cam shaft 1 on tappet 2 tops, admission cam shaft 1 comprises fixing part 12, the extension of fixing part 12 forward end is provided with bump 11, take fixing part 12 centers as the center of circle, the angle that bump 11 opens is the protrusion angle a of admission cam shaft 1, the span of protruding angle a is that the basis of this protrusion angle a is to play calculating by engine piston at top dead center greater than 110 degree angles and less than or equal to 170 degree angles.
Fig. 2 e, admission cam shaft and traditional tappet fit applications that the angle is protruded in the increasing of Fig. 2 f arrive engine structure working procedure schematic representation.
A is 110 degree in the present embodiment.
This scheme is to strengthen the schematic representation that camshaft that admission cam shaft protrudes the angle cooperates with traditional tappet, its working procedure is described below: wherein (1) to (3) figure is that expression air intake valve 53 is opened to the closing process end, this moment, piston 55 continuation were done compression process to going upward to top dead center, referring to piston stroking upward to peak, namely is top side location.
Embodiment two:
Please in conjunction with consulting Fig. 2 a, Fig. 2 b, Fig. 3 b, this embodiment is for protruding another wide-angle example of angle a, and tappet 2 is the tappet structure of prior art;
The admission cam shaft 1 that the increasing of Fig. 2 b is protruded the angle and traditional tappet 2 fit applications to the running of motor are:
Piston 55 is gone air-breathing from top to bottom, and bent cake 57 air intake valve 53 that turns clockwise begins to open and sucks flammable mixed gas (a diesel engine suck).All be breathing process from Fig. 3 b (1) to (3), piston 55 arrives after bottom dead center (said lower dead center position descent of piston minimum point, the position of piston area), strengthen the camshaft 1 that angle a is protruded in air inlet owing to adopting, also do not close air intake valve 53 this moment, but piston 55 rotates to up with bent cake 57, the part gas that sucks is discharged to (4) by suction tude 51 outward also not to be stopped, until admission cam shaft 1 is when going to (5) position, top tappet 2 not, air intake valve 53 is closed fully.Combustion chamber design is made the compression ratio calculation Design with this point of piston to being up to top dead center.
A is 145 degree in the present embodiment.
Embodiment three:
See also Fig. 2 c, shown in Fig. 2 d and Fig. 3 c, this embodiment is for protruding angle a one small angle example, a kind of engine structure that changes the protrusion angle of admission cam shaft, the tappet 2 that comprises prior art, be provided with admission cam shaft 1 on tappet 2 tops, admission cam shaft 1 comprises fixing part 12, the extension of fixing part 12 forward end is provided with bump 11, take fixing part 12 centers as the center of circle, the angle that bump 11 opens is the protrusion angle a of admission cam shaft 1, the span of protruding angle a is that the basis of this protrusion angle a is to play calculating by engine piston at top dead center greater than 10 degree angles and less than or equal to 75 degree angles.
A is 45 degree in the present embodiment.
Embodiment four:
Present embodiment is different from above-described embodiment to be, for traditional tappet structure, also improves.
A kind of engine structure that changes the protrusion angle of admission cam shaft, include tappet 2, be provided with admission cam shaft 1 on tappet 2 tops, admission cam shaft 1 comprises fixing part 12, the extension of fixing part 12 forward end is provided with bump 11, and take fixing part 12 centers as the center of circle, the angle that bump 11 opens is the protrusion angle a of admission cam shaft 1, the span of protruding angle a is that the basis of this protrusion angle a is to play calculating by engine piston at top dead center more than or equal to 110 degree angles and less than or equal to 170 degree angles; Perhaps protrude the span of angle a for spending angles more than or equal to 10 degree angles and less than or equal to 75; See also shown in Fig. 4 b, Fig. 4 c, Fig. 4 d, Fig. 4 e Fig. 4 f, Fig. 4 g, Fig. 4 h, the top of tappet 2 is provided with stepped platform 3, and the side of admission cam shaft 1 is resisted against on the stepped platform 3 by different positions respectively in different working procedure.
Please in conjunction with shown in Fig. 4 a and Fig. 2 b, the upper surface of stepped platform 3 and one side joining part are step cambered surface 31, the sidewall of fixing part 12 is circular arc sidewall 14, the sidewall of bump 11 is arc surfaced sidewall 13, circular arc sidewall 14 is concave arc surface 15 with arc surfaced sidewall 13 jointing places, arc surfaced sidewall 13 is cambered surface 16 with bump 11 front-end face jointing places, and described concave arc surface 15 leans with step cambered surface 31; During cambered surface 16 running and tappet 2 end faces connect.
Further, stepped platform 3 can be the recessed sky in inside, and it helps to alleviate the weight of tappet, as Fig. 4 b, Fig. 4 e, shown in Fig. 4 g, Fig. 4 f and Fig. 4 h.
Further, in the both sides of stepped platform 3 baffle plate 32 is housed, baffle plate 32 gears are in admission cam shaft 1 both sides, shown in Fig. 4 d, Fig. 4 e.
Fig. 5 protrudes the increasing of Fig. 2 b the admission cam shaft at angle and improves the tappet fit applications to engine structure working procedure schematic representation, and the expression air inlet begins to end.
Embodiment five:
See also Fig. 6 a to shown in Fig. 6 d, present embodiment is that another wide-angle admission cam shaft arrives engine structure working procedure schematic representation with improving the tappet fit applications, and it is identical with embodiment four that it improves tappet structure;
Among Fig. 6 b (1)--(4) be engine charge camshaft 1, back down tappet 2 makes air intake valve 53 open air inlet, and piston 55 comes downwards to lower dead center by top dead center.But valve is not also closed, piston 55 turns to (1) that goes upward to Fig. 6 c, because the particular design of admission cam shaft 1: when camshaft protrusion angle rotates to bump other end arc surfaced sidewall 13, lose protruding bit position structure suddenly, cooperate step cambered surface 31 designs that improve tappet stepped platform 3, make tappet lose the top power of camshaft 12 within a short period of time, air intake valve 53 is closed rapidly suddenly, its benefit is that to overcome usual 1 shut-in time of camshaft long, turnover gas just forms less air flue area before closing, turnover gas is had some setbacks, this moment is from the piston 55 of Fig. 6 c to up (2) that begin to be compressed to Fig. 6 c of top dead center, the compression ratio design is done by piston 55 these row distances in the firing chamber, (2) compression by Fig. 6 c finishes, and sucks the ignition (diesel engine ejection diesel combustion) of inflammable mixture, and the explosive expansions pushing piston is to descending acting, finish (3) to Fig. 6 c, and drain tap 54 begins to open exhaust.
Fig. 6 c (5) are exhaust processes, and to (1) exhaust end of Fig. 6 d, drain tap 54 is closed, and finish bent 57 two weeks of rotation of cake of circulation of motor.
(2) (3) (4) of Fig. 6 d are (1) (2) (3) of Fig. 6 c, (2) piston 55 up compression distance a of Fig. 6 d and (4) piston 55 descending work distance b of Fig. 6 d, same conclusion, b is greater than a, learn the acting allowance for expansion of motor greater than admission space, thereby improve engine efficiency.
Embodiment six:
Present embodiment is to reduce air inlet to protrude the admission cam shaft at angle and improve the tappet fit applications to engine structure working procedure schematic representation, and it is identical with embodiment four that it improves tappet structure.
Engine charge camshaft 1 begins top tappet 2 in (1) of Fig. 7 a, open air intake valve 53, inflammable mixture, suck cylinder (diesel engine suck air) by suction tude 51, Fig. 7 a (2) are also at intake process, the tappet 2 of Fig. 7 a (3) loses rapidly the top power of camshaft 1, air intake valve 53 is closed at short notice, this moment, piston 55 did not also go downwards to lower dead center, bent cake 57 continue rotation by (3) of Fig. 7 a to (4), (5) and Fig. 7 b (1), reply the admission space of Fig. 7 a (3) this moment, and piston 55 just really upwards is compressed to top dead center, and the firing chamber also is to calculate the compression ratio design by this compression distance.(2) compression of Fig. 7 b is finished, the acting of ignition (diesel engine fuel injecting burning) blast pushing piston comes downwards to (3) of Fig. 7 b, piston 55 actings are finished and are begun to open drain tap 54 exhausts, and (1) of (4) of Fig. 7 b and (5) and Fig. 7 c is that exhaust process arrives the exhaust end.Finish a circulation in two weeks of engine revolution.The compression Top Runby a of the piston 55 from (2), (3) of Fig. 7 c, (4) and the difference of piston expansion Bottom Runby b are found out b greater than a, draw descent of piston acting volume greater than the up volume of piston compression.Hot mechanical efficiency improves.
A is 70 degree in the present embodiment.
Embodiment seven:
See also shown in Fig. 8 a and Fig. 8 b, and in conjunction with shown in Fig. 2 f, a kind of engine structure that changes the protrusion angle of admission cam shaft, include Rocker arm 4; wear positioning shaft 41 on the Rocker arm 4; Rocker arm 4 one end connects the fixed end 531 of air intake valve 53; the other end below and admission cam shaft 1 against; admission cam shaft 1 comprises fixing part 12; fixing part 12 forward end are extended and are provided with bump 11; take fixing part 12 centers as the center of circle; the angle that bump 11 opens is the protrusion angle a of admission cam shaft 1; span of protruding angle a be more than or equal to 110 degree angles and less than or equal to 170 degree angles, and the span of perhaps protruding angle a is for spending angles more than or equal to 10 degree angles and less than or equal to 75, and the basis of this protrusion angle a is to play calculating by engine piston at top dead center.
The sidewall of fixing part 12 is circular arc sidewall 14, the sidewall of described bump 11 is arc surfaced sidewall 13, circular arc sidewall 14 is concave arc surface 15 with arc surfaced sidewall 13 jointing places, and when admission cam shaft 1 rotation, concave arc surface 15 and bump 11 front-end faces are conflicted respectively below the Rocker arm 4 end.
Embodiment eight:
See also shown in Fig. 8 c, and in conjunction with shown in Fig. 2 f, on embodiment seven basis, below the Rocker arm 4 end, also be provided with boss 42, the corner of boss 42 is the arc surfaced angle, and the sidewall of fixing part 12 is circular arc sidewall 14, and the sidewall of bump 11 is arc surfaced sidewall 13, circular arc sidewall 14 is concave arc surface 15 with arc surfaced sidewall 13 jointing places, and concave arc surface 15 is conflicted on a jiao of boss 42.
Embodiment nine:
See also shown in Fig. 8 d and Fig. 8 e, and in conjunction with shown in Fig. 2 f, a kind of engine structure that changes the protrusion angle of admission cam shaft, include Rocker arm 4; Rocker arm 4 one end connects the fixed end 531 of air intake valve 53; be equipped with positioning shaft 41 on the other end; the Rocker arm 4 surface is provided with ladder step 43; corner of ladder step 43 is the arc surfaced angle; admission cam shaft 1 comprises fixing part 12; fixing part 12 forward end are extended and are provided with bump 11; take fixing part 12 centers as the center of circle, the angle that bump 11 opens is the protrusion angle a of admission cam shaft 1, and the span of protruding angle a be more than or equal to 110 degree angles and less than or equal to 170 degree angles; the span of perhaps protruding angle a is for spending angles more than or equal to 10 degree angles and less than or equal to 75, and the basis of this protrusion angle a is to play calculating by engine piston at top dead center; The sidewall of fixing part 12 is circular arc sidewall 14, and the sidewall of bump 11 is arc surfaced sidewall 13, and circular arc sidewall 14 is concave arc surface 15 with arc surfaced sidewall 13 jointing places, and concave arc surface 15 is conflicted on a jiao of ladder step 43.
Embodiment ten:
See also shown in Fig. 2 g and Fig. 2 h, from embodiment three and embodiment's six different being, the protrusion angle a of present embodiment is 10 degree angles, rocking arm and camshaft that the admission cam shaft of present embodiment angle protrudes angle and various structures all can be used, its working principle such as Fig. 3 c and Fig. 7 a, 7b is shown in the 7c.
This motor cooperates electronic oil injection, and oil sprayer should arrange to the greatest extent can be near suction valve.When air inlet begins, be preferably in piston and this time fuel has been sprayed and suck cylinder to the descending air-breathing half that carries out.To descending suck to lower dead center, finish air-breathing afterwards.Because this design is the retarded admission valve closing, so turned to uply by bent axle band piston, walk to designing requirement, this process is that the air that inhale the rear section is discharged by suction tude 51 again, the mixed gas that forward part sucks keeps substantially.Close again air intake valve this moment.Piston with this to the up top dead center that is compressed to.Combustion chamber design is with this compression process designing and calculating compression ratio, ignition blast acting after compression finishes, diesel engine fuel injecting work by combustion (firing time and spray the diesel oil time as existing motor, the predicted point time carries out).Drawing at last expands does work volume greater than the piston compression volume to piston, makes the more effective release of inner pressure of air cylinder acting.Reduce heat leakage.This moment, exhaust pressure reduction outlet pipe and silencing apparatus just can be complicated.Making good use of of hot merit, engine temperature reduces, the water channel of cooling system, water pump, water tank, could the cooling water tank fan exist? if do not exist, that motor is more oversimplified, and is lightweight, and the high efficiency fuel saving is a kind of motor of environmental protection.
Above-listed detailed description is that this embodiment limits claim of the present invention for the specifying of possible embodiments of the present invention, and the equivalence that all the present invention of disengaging do is implemented or change, all should be contained in the claim of this case.
Claims (10)
1. engine structure that changes the protrusion angle of admission cam shaft, it is characterized in that: include tappet (2), be provided with admission cam shaft (1) on tappet (2) top, admission cam shaft (1) comprises fixing part (12), the extension of fixing part (12) forward end is provided with bump (11), take fixing part (12) center as the center of circle, the angle that bump (11) opens is the protrusion angle a of admission cam shaft (1), the span of described protrusion angle a is more than or equal to 110 degree angles and less than or equal to 170 degree angles, the span of perhaps protruding angle a is that the basis of this protrusion angle a is to play calculating by engine piston at top dead center more than or equal to 10 degree angles and less than or equal to 75 degree angles.
2. the engine structure at the protrusion angle of change admission cam shaft as claimed in claim 1, it is characterized in that: the sidewall of described fixing part (12) is circular arc sidewall (14), the sidewall of described bump (11) is arc surfaced sidewall (13), circular arc sidewall (14) is concave arc surface (15) with arc surfaced sidewall (13) jointing place, and arc surfaced sidewall (13) is cambered surface (16) with bump (11) front-end face jointing place.
3. engine structure that changes the protrusion angle of admission cam shaft, it is characterized in that: include tappet (2), be provided with admission cam shaft (1) on tappet (2) top, admission cam shaft (1) comprises fixing part (12), the extension of fixing part (12) forward end is provided with bump (11), take fixing part (12) center as the center of circle, the angle that bump (11) opens is the protrusion angle a of admission cam shaft (1), the span of described protrusion angle a is more than or equal to 110 degree angles and less than or equal to 170 degree angles, the span of perhaps protruding angle a is that the basis of this protrusion angle a is to play calculating by engine piston at top dead center more than or equal to 10 degree angles and less than or equal to 75 degree angles;
The top of described tappet (2) is provided with stepped platform (3), and described admission cam shaft (1) side is resisted against on the described stepped platform (3).
4. a kind of engine structure that changes the protrusion angle of admission cam shaft as claimed in claim 3, it is characterized in that: the upper surface of described stepped platform (3) and one side joining part are step cambered surface (β 1), the sidewall of described fixing part (12) is circular arc sidewall (14), the sidewall of described bump (11) is arc surfaced sidewall (13), circular arc sidewall (14) is concave arc surface (15) with arc surfaced sidewall (13) jointing place, arc surfaced sidewall (13) is cambered surface (16) with bump (11) front-end face jointing place, and described concave arc surface (15) connects with step cambered surface (31); During engine running, described cambered surface (16) connects with tappet (2) end face.
5. a kind of engine structure that changes the protrusion angle of admission cam shaft as claimed in claim 3 is characterized in that: the inner recessed sky of described stepped platform (3).
6. a kind of engine structure that changes the protrusion angle of admission cam shaft as claimed in claim 3, it is characterized in that: in the both sides of described stepped platform (3) baffle plate (32) is housed, baffle plate (32) keeps off in admission cam shaft (1) both sides.
7. engine structure that changes the protrusion angle of admission cam shaft, it is characterized in that: include rocking arm (4); wear positioning shaft (41) on the rocking arm (4); rocking arm (4) one ends connect the fixed end (531) of air intake valves (53); the other end below and admission cam shaft (1) against; admission cam shaft (1) comprises fixing part (12); fixing part (12) forward end is extended and is provided with bump (11); take fixing part (12) center as the center of circle; the angle that bump (11) opens is the protrusion angle a of admission cam shaft (1); the span of described protrusion angle a be more than or equal to 110 degree angles and less than or equal to 170 degree angles; the span of perhaps protruding angle a is for spending angles more than or equal to 10 degree angles and less than or equal to 75, and the basis of this protrusion angle a is to play calculating by engine piston at top dead center.
8. the engine structure at the protrusion angle of change admission cam shaft as claimed in claim 7, it is characterized in that: the sidewall of described fixing part (12) is circular arc sidewall (14), the sidewall of described bump (11) is arc surfaced sidewall (13), circular arc sidewall (14) is concave arc surface (15) with arc surfaced sidewall (13) jointing place, when admission cam shaft (1) rotated, concave arc surface (15) and bump (11) front-end face were conflicted respectively below rocking arm (4) end.
9. the engine structure at the protrusion angle of change admission cam shaft as claimed in claim 7, it is characterized in that: also be provided with boss (42) in below, described rocking arm (4) end, the corner of boss (42) is the arc surfaced angle, the sidewall of described fixing part (12) is circular arc sidewall (14), the sidewall of described bump (11) is arc surfaced sidewall (13), circular arc sidewall (14) is concave arc surface (15) with arc surfaced sidewall (13) jointing place, and described concave arc surface (15) is conflicted on a jiao of boss (42).
10. engine structure that changes the protrusion angle of admission cam shaft, it is characterized in that: include rocking arm (4), rocking arm (4) one ends connect the stiff end (531) of air intake valve (53), on the other end, be equipped with locating shaft (41), described rocking arm (4) surface is provided with ladder step (43), the corner of ladder step (43) is the arc surfaced angle, described admission cam shaft (1) comprises fixed part (12), the extension of fixed part (12) forward end is provided with protuberance (11), take fixed part (12) center as the center of circle, the angle that protuberance (11) opens is the protrusion angle a of admission cam shaft (1), the span of described protrusion angle a is more than or equal to 110 degree angles and less than or equal to 170 degree angles, perhaps protrude the span of angle a for more than or equal to 10, spending angles and spend angles less than or equal to 75, the basis of this protrusion angle a is at top dead centre, to play calculating by engine piston, the sidewall of described fixed part (12) is circular arc sidewall (14), the sidewall of described protuberance (11) is arc surfaced sidewall (13), circular arc sidewall (14) is cancave cambered surface (15) with arc surfaced sidewall (13) junction, and described cancave cambered surface (15) is conflicted on a jiao of ladder step (43).
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310015919.3A CN103075219B (en) | 2013-01-16 | 2013-01-16 | A kind of engine structure changing the protrusion angle of admission cam shaft |
| PCT/CN2014/070738 WO2014111033A1 (en) | 2013-01-16 | 2014-01-16 | Engine structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310015919.3A CN103075219B (en) | 2013-01-16 | 2013-01-16 | A kind of engine structure changing the protrusion angle of admission cam shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103075219A true CN103075219A (en) | 2013-05-01 |
| CN103075219B CN103075219B (en) | 2015-12-23 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310015919.3A Expired - Fee Related CN103075219B (en) | 2013-01-16 | 2013-01-16 | A kind of engine structure changing the protrusion angle of admission cam shaft |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN103075219B (en) |
| WO (1) | WO2014111033A1 (en) |
Cited By (3)
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| WO2014111033A1 (en) * | 2013-01-16 | 2014-07-24 | Lu Zhanggen | Engine structure |
| CN105065073A (en) * | 2015-07-24 | 2015-11-18 | 江兰超 | Variable compression engine with cam and working strokes greater than compression stroke |
| CN110976412A (en) * | 2019-12-08 | 2020-04-10 | 常德云港生物科技有限公司 | Vibrations formula bile acid draws test tube cleaning device in batches for experiments |
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| CN103075219B (en) * | 2013-01-16 | 2015-12-23 | 卢章根 | A kind of engine structure changing the protrusion angle of admission cam shaft |
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2013
- 2013-01-16 CN CN201310015919.3A patent/CN103075219B/en not_active Expired - Fee Related
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2014
- 2014-01-16 WO PCT/CN2014/070738 patent/WO2014111033A1/en active Application Filing
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| JP2005133581A (en) * | 2003-10-28 | 2005-05-26 | Yanmar Co Ltd | Reverse rotation prevention mechanism for diesel engine |
| CN1699747A (en) * | 2005-07-06 | 2005-11-23 | 蔡道德 | Piston type air pressure engine for vehicle |
| CN2890346Y (en) * | 2005-12-13 | 2007-04-18 | 王增善 | Gas distribution cam for internal combustion engine and cylinder therefor |
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| WO2014111033A1 (en) * | 2013-01-16 | 2014-07-24 | Lu Zhanggen | Engine structure |
| CN105065073A (en) * | 2015-07-24 | 2015-11-18 | 江兰超 | Variable compression engine with cam and working strokes greater than compression stroke |
| CN110976412A (en) * | 2019-12-08 | 2020-04-10 | 常德云港生物科技有限公司 | Vibrations formula bile acid draws test tube cleaning device in batches for experiments |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103075219B (en) | 2015-12-23 |
| WO2014111033A1 (en) | 2014-07-24 |
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