CN209704718U - A kind of exhaust gas recirculation type fuel engines - Google Patents

Abstract

The utility model provides a kind of exhaust gas recirculation type fuel engines, belongs to automobile technical field.This fuel engines includes the air inlet discrimination hole being provided on cylinder body and exhaust qi hole, the top opening of cylinder body, the top open part of cylinder body has a rotor being rotatably connected on cylinder body, the center of rotor is fixedly connected with a shaft, a notch for running through rotor bottom wall surface is offered on rotor, notch can be connected to air inlet qi hole and combustion chamber or outlet qi hole and combustion chamber；The circulating slot of an annular is offered on cylinder body, circulating slot is located at air inlet qi hole and is vented the top in qi hole, a turntable being rotatably connected on cylinder body is fixedly installed on rotor, the lower surface of turntable is circumferentially uniformly fixed with several installation axles, torsional spring drives disc parallel with the radial line of turntable, circulating slot is provided with several convex blocks on the side wall of air inlet Qi Kongchu, disc can by convex block limit and rotated around corresponding installation axle.The utility model has many advantages, such as that engine emission improved properties can be made.

Description

A kind of exhaust gas recirculation type fuel engines

Technical field

The utility model belongs to automobile technical field, is related to a kind of exhaust gas recirculation type fuel engines.

Background technique

Fuel engines is widely used on the transit equipments such as automobile, and those skilled in the art are known: fuel engines is (special Not petrol engine) fuel supply volume according near atomizer air inflow determine, air inflow is big, the torque of engine Increase, uses turbo charged mode at the appropriate time in the prior art or full working scope promotes admission pressure, to increase Big engine torque, turbocharger use exhausting waste gas pressure for power source, the exhaust gas turbine being arranged at waste gas exhaust pipe Air inlet turbine connecting shaft with being arranged at inlet manifold, makes its synchronization, makes air inlet using exhaust gas pressure driving air inlet turbine rotation Admission pressure increases at manifold, although this way technology maturation, also brings certain side effect and defect, such as exhaust gas Exhaust resistance increase, cause exhausting waste gas to be not thorough, the residual of exhaust gas in the combustion chamber is more, burn indoor air-intake negative-pressure by It influences, combustion residue is more, and carbon distribution is more, although the thorough burning that exhaust gas recycling is conducive to dyestuff still passes through increase The mode of exhaust resistance is apparently not ideal structure, because it influences exhaust gas discharge frequency and makees to the back pressure of exhaust valve With, moreover, generally high engine speeds Operation Conditions when turbocharger acts on, exhaust gas recycles under the operating condition necessity compared with It is low；High exhaust temperatures are high to the connecting shaft rotating requires between exhaust gas turbine and air inlet turbine, keep turbocharger cost high, and Service life is shorter.

Existing conventional engine by the way of exhaust valve, inlet valve to combustion chamber and exhaust manifold and inlet manifold into In the ranks having a rest property alternate communication and cut-off, between valve and cylinder body tap frequency it is very big, and tap during caused by wear and can change Become bags size and influence air-tightness, valve blow-by is the routinely failure of engine in use for some time, combustion Burning room high temperature influences the reliable service life of valve lubrication and valve, this is also the defect and disadvantage of current conventional engine.

Based on this, the drawbacks of the application aims to solve the problem that the defect and available engine of said one or multiple prior arts.

Utility model content

The purpose of this utility model is aiming at the above problems existing in the prior art, to provide a kind of exhaust gas recirculation type combustion Oil turbine, technical problem to be solved in the utility model be how to drive portion be again introduced into combustion chamber carry out it is secondary Burning improves emission performance.

The purpose of this utility model can be realized by the following technical scheme: a kind of exhaust gas recirculation type fuel engines, Fuel engines includes cylinder body, is slidably connected at the intracorporal piston of cylinder and the crankshaft with piston hinge, which is characterized in that this fuel oil Engine includes the air inlet discrimination hole being provided on cylinder body and exhaust qi hole, the top opening of the cylinder body, the top of the cylinder body Opening has a rotor being rotatably connected on cylinder body, and the inboard wall of cylinder block face, piston top surface and rotor bottom surface are formed The combustion chamber of engine, the center of the rotor are fixedly connected with a shaft, the shaft and crankshaft-synchronous, open on the rotor The notch for running through rotor bottom wall surface equipped with one, the notch can be connected to air inlet qi hole and combustion chamber or outlet qi hole and burning Room；The circulating slot of an annular is offered on the cylinder body, the circulating slot is located at air inlet qi hole and is vented the top in qi hole, described Circulating slot and the intersection intercommunication of air inlet qi hole, the circulating slot and exhaust qi hole intersection intercommunication are fixedly installed on the rotor There is a turntable being rotatably connected on cylinder body, the lower surface of the turntable is circumferentially uniformly fixed with several installation axles, the installation A disc is rotatably connected to by a torsional spring on axis, the torsional spring drives disc parallel with the radial line of turntable, and the circulating slot leans on Be provided with several convex blocks on the side wall of nearly air inlet Qi Kongchu, the disc can by convex block limit and around corresponding installation axle Rotation.

The intake and exhaust valves of conventional engines are replaced by rotor and the notch being provided on rotor, and notch alternately makes The connection in air inlet qi hole and outlet qi hole and combustion chamber, realization select an air inlet or exhaust, make the activity at engine breathing position Part is reduced, and there is no hitting, reduces the abrasion between engine noise and movable part.

Exhaust gas is rotated at discharge manifold by turntable, the space of storage exhaust gas is formed between adjacent disc, by exhaust gas portion Divide and carry to air inlet Qi Kongchu, be inhaled into combustion chamber under the air-intake negative-pressure of fresh air, in order to avoid fresh air entrance Several protrusions are arranged close to the position of inlet manifold on the side wall of circulating slot in discharge manifold, disc by raised role and It swings, keeps the disc being located near air inlet qi hole oblique, i.e., it is smaller to the gas-flow resistance above air inlet qi hole, on the one hand use In release exhaust gas to air inlet qi hole, on the other hand prevent fresh air by disc " driving " to circulating slot.

Exhaust gas recycling is conducive to substance imperfect combustion in exhaust gas and is burning, and can also carry out the waste heat in exhaust gas It recycles, reduces the tail gas harmful substance contents of engine, improve the performance of engine.

The rotation of rotor, can also drive homogenizing for mixed gas in combustion chamber, and the presence of notch makes the indoor air flow that burns By notch drag effect and spiral circulation, realize the mixing of mixed gas, in the combustion chamber formed vortex, increase burning A possibility that thorough, increases air-intake negative-pressure, improves pressure at expulsion, and air inlet qi hole and exhaust qi hole can also be spirally distributed The outside of cylinder body makes it echo rotor bring vortex, keeps said effect more significant, the presence of vortex can also be shortened by point Fire is to the time burnt comprehensively, a possibility that reducing detonation, keeps burning more thorough, improves exhaust mass.

In a kind of above-mentioned exhaust gas recirculation type fuel engines, the notch is in the inclined spiral shell of rotor rotation direction Revolve shape.

The helical form of notch is arranged, and can further improve rotor rotation and form " vortex " to mixed gas in combustion chamber Effect, improve engine performance.

Synchronizing between shaft and crankshaft refers to that revolving speed is identical, is realized between the two by the bevel gear being fixed on crankshaft The switching of rotation direction, it is then synchronous by the way that chain realization is arranged between shaft and bevel gear.

Detailed description of the invention

Fig. 1 is the structural schematic diagram of this fuel engines.

Fig. 2 is the schematic perspective view of rotor.

Fig. 3 is the structural schematic diagram of speed limiting clutch.

Fig. 4 is the sectional view in Fig. 1 on the direction A-A.

In figure, 1, cylinder body；2, piston；21, air inlet discrimination hole；22, it is vented qi hole；3, rotor；31, shaft；32, notch；41, Transmission gear；42, plenum axis；43, air inlet turbine；44, air-discharging and supercharging axis；45, pressure gear；46, exhaust driven gas turbine； 51, circulating slot；52, turntable；53, installation axle；54, disc；55, convex block；61, inner ring；62, type frame；63, limit sleeve；64, it is interior from Close circle；65, outer clutch ring；66, recess；67, it is driven roller；68, bonding pad；69, preloading spring；7, mounting rack；71, pin shaft； 72, guiding axis；73, roller is limited.

Specific embodiment

It is specific embodiment of the utility model and in conjunction with attached drawing below, the technical solution of the utility model is made further Description, but the utility model is not limited to these examples.

As shown in Figure 1, Figure 2 and Figure 4, fuel engines include cylinder body 1, the piston being slidably connected in cylinder body 12 and with work Fill in 2 hinged crankshafts, which is characterized in that this fuel engines includes the air inlet discrimination hole 21 being provided on cylinder body 1 and exhaust qi hole 22, the top opening of cylinder body 1, the top open part of cylinder body 1 has a rotor 3 being rotatably connected on cylinder body 1,1 inner wall of cylinder body Face, 2 top surface of piston and 3 bottom surface of rotor form the combustion chamber of engine, and the center of rotor 3 is fixedly connected with a shaft 31, Shaft 31 and crankshaft-synchronous, a notch 32 for running through 3 bottom wall of rotor is offered on rotor 3, and notch 32 can be connected to air inlet Qi hole and combustion chamber or outlet qi hole and combustion chamber are fixedly installed a transmission gear 41, the company of rotation on cylinder body 1 in shaft 31 It is connected to a plenum axis 42 and an air-discharging and supercharging axis 44, one and biography are respectively connected on plenum axis 42 and air-discharging and supercharging axis 44 The pressure gear 45 that moving gear 41 engages, is provided in air inlet qi hole on plenum axis 42 and can be in plenum Axis 42 drives air inlet qi hole interior air-flow to flow to combustion chamber direction air inlet turbine when opposite with 41 rotation direction of transmission gear 43；It is provided on air-discharging and supercharging axis 44 and is located in exhaust qi hole 22 and can be rotated in air-discharging and supercharging axis 44 and transmission gear 41 Drive exhaust 22 interior air-flow of qi hole to the exhaust driven gas turbine 46 flowed away from combustion chamber direction when contrary；

The circulating slot 51 of an annular is offered on cylinder body 1, circulating slot 51 is located at air inlet qi hole and is vented the top in qi hole 22, Circulating slot 51 and the intersection intercommunication of air inlet qi hole, circulating slot 51 and exhaust 22 intersection intercommunication of qi hole are fixedly installed on rotor 3 One is rotatably connected on the turntable 52 on cylinder body 1, and the lower surface of turntable 52 is circumferentially uniformly fixed with several installation axles 53, installation axle 53 Upper to be rotatably connected to a disc 54 by a torsional spring, torsional spring drives disc 54 parallel with the radial line of turntable 52, and circulating slot 51 is close Be provided with several convex blocks 55 on the side wall of air inlet Qi Kongchu, disc 54 can by convex block 55 limit and around corresponding installation axle 53 rotations.

The intake and exhaust valves of conventional engines are replaced by rotor 3 and the notch 32 being provided on rotor 3, and notch 32 is handed over Make the connection in air inlet qi hole and outlet qi hole and combustion chamber for property, realization selects an air inlet or exhaust, makes engine breathing position Movable part reduce, and there is no hitting, reduce the abrasion between engine noise and movable part.

Exhaust gas is rotated at discharge manifold by turntable 52, forms the space of storage exhaust gas between adjacent disc 54, will give up Gas part is carried to air inlet Qi Kongchu, is inhaled into combustion chamber under the air-intake negative-pressure of fresh air, in order to avoid fresh air Into discharge manifold, several protrusions are set close to the position of inlet manifold on the side wall of circulating slot 51, disc 54 is by protrusion Effect and swing, keep the disc 54 being located near air inlet qi hole oblique, i.e., to the gas-flow resistance above air inlet qi hole compared with It is small, on the one hand for discharging exhaust gas to air inlet qi hole, on the other hand prevent fresh air by disc 54 " driving " to circulating slot 51 It is interior.

Exhaust gas recycling is conducive to substance imperfect combustion in exhaust gas and is burning, and can also carry out the waste heat in exhaust gas It recycles, reduces the tail gas harmful substance contents of engine, improve the performance of engine.

Rotor 3 rotates, and rotates air inlet turbine 43, increases air inlet Qi Kongchu to the air-intake negative-pressure in combustion chamber direction, from And increase air inflow, increase fuel supply volume, and then increase the discharge capacity of engine；Rotor 3 rotates, and revolves exhaust driven gas turbine 46 Turn, makes to be vented the pressure at expulsion at qi hole 22 away from combustion chamber direction and increase, to improve exhaust efficiency, indirectly increase air inlet Amount, increases fuel supply volume, and then increases the discharge capacity of engine

The intake and exhaust valves of conventional engines are replaced by rotor 3 and the notch 32 being provided on rotor 3, and notch 32 is handed over Make the connection in air inlet qi hole and outlet qi hole and combustion chamber for property, realization selects an air inlet or exhaust, makes engine breathing position Movable part reduce, and there is no hitting, reduce the abrasion between engine noise and movable part.

The rotation of rotor 3 can also drive homogenizing for mixed gas in combustion chamber, and the presence of notch 32 makes in combustion chamber Air-flow by notch 32 drag effect and spiral circulation, realize the mixing of mixed gas, in the combustion chamber formed vortex, increase A possibility that large-scale combustion is thorough increases air-intake negative-pressure, improves pressure at expulsion, air inlet qi hole and exhaust qi hole 22 can also be in spiral shell Rotation shape is distributed in the outside of cylinder body 1, so that it is echoed 3 bring of rotor vortex, keeps said effect more significant, the presence of vortex is also A possibility that capable of shortening by lighting a fire to the time burnt comprehensively, reducing detonation, keeps burning more thorough, improves exhaust mass.

Plenum axis 42 and air-discharging and supercharging axis 44 are evenly distributed on outside rotor 3, are had for the stability of rotation to rotor 3 It improves, stress in its rotation process is made to be shared and be cancelled out each other, improve reliability.

As shown in figures 1 and 3, between plenum axis 42 and pressure gear 45, air-discharging and supercharging axis 44 and pressure gear 45 Between be provided with a speed limiting clutch, speed limiting clutch includes the inner ring 61 being connected with plenum axis 42, is set in inner ring 61 it is outer and be connected with inner ring 61 type frame 62, be set in outside type frame 62 limit sleeve 63, be rotatably connected on outside limit sleeve 63 in Clutch ring 64 and the outer clutch ring 65 being set in outside interior clutch ring 64,62 lateral wall of type frame have several limit notch 66, limit It is rotatably connected to transmission roller 67 in recess 66, is radially slidably connected on interior clutch ring 64 a pair of with transmission roller 67 1 The mounting rack 7 answered, mounting rack 7 include a pin shaft 71 and two guiding axis 72, are rotatably connected on pin shaft 71 and are fastened on two The limit roller 73 being driven between roller 67 offers pilot hole corresponding with guiding axis 72, guiding axis 72 on interior clutch ring 64 It is slidably connected in pilot hole along 61 radial line direction of inner ring, pin shaft 71 is fixed between the inner end of two guiding axis 72, same peace It shelves and is fixedly connected with a bonding pad 68 between the outer end of 7 two guiding axis 72, bonding pad 68 can be resisted against outer clutch ring On 65 inner wall, the preloading spring 69 under compressive state is connected between guiding axis 72 and interior clutch ring 64；Pressure gear 45 are fixed on outer clutch ring 65.

Air inlet turbine 43 is not suitable for opening under low engine speed operating condition, and turbocharger is in low speed shape in conventional engines On the one hand the reason of being not turned under condition is that exhaust gas pressure is smaller under speed operation, can not drive the turbine high speed at inlet manifold On the other hand rotation is the fuel-economizing that engine is mainly considered under speed operation, air inflow increase will increase oil inlet quantity, thus shadow Ring the fuel-economizing of engine.

Based on this, in the application, a speed limiting clutch is connected between plenum axis 42 and pressure gear 45, it should be from Clutch working principle is as follows: when shaft 31 slowly runs, the active force for being driven 67 pairs of limit rollers 73 of roller is smaller, can not drive It compresses preloading spring 69 and slides in and out guiding axis 72, and the centrifugal force of mounting rack 7 is smaller, to preloading spring 69 Pressing force is smaller, and bonding pad 68 cannot be resisted against on outer 65 inner wall of clutch ring, makes inner ring 61 and the relatively outer clutch of interior clutch ring 64 It is separated between circle 65, i.e., pressure gear 45 rotates and plenum axis 42 does not rotate, and it is not right under low engine speed operating condition to realize Air inflow is interfered；In 31 high-speed rotation of shaft, the active force for being driven 67 pairs of limit rollers 73 of roller is larger, can drive It compresses preloading spring 69 and slides in and out guiding axis 72, and the centrifugal force of mounting rack 7 relatively reaches, to preloading spring 69 Pressing force relatively reaches, and bonding pad 68 is pressed on outer 65 inner wall of clutch ring, makes the relatively outer clutch ring 65 of inner ring 61 and interior clutch ring 64 Between combine, i.e., pressure gear 45 rotation with 42 synchronous rotary of plenum axis, realization increase under high engine speeds operating condition into Atmospheric pressure；Under engine medium speed therebetween, clutch is in half-clutch state, the intervention air inlet of smaller effect Amount.

A speed limiting clutch is connected between air-discharging and supercharging axis 44 and pressure gear 45, the clutch working principle is such as Under: when shaft 31 slowly runs, the active force for being driven 67 pairs of limit rollers 73 of roller is smaller, and preloading spring 69 can not be driven to press Contracing slides in and out guiding axis 72, and the centrifugal force of mounting rack 7 is smaller, smaller to the pressing force of preloading spring 69, in conjunction with Piece 68 cannot be resisted against on outer 65 inner wall of clutch ring, make to separate between the relatively outer clutch ring 65 of inner ring 61 and interior clutch ring 64, i.e., Pressure gear 45 rotates and air-discharging and supercharging axis 44 does not rotate, and realization is not done exhaust efficiency under low engine speed operating condition It relates to, so that portion is retained and carry out second-time burning in the combustion chamber；In 31 high-speed rotation of shaft, it is driven 67 pairs of roller limits The active force of position roller 73 is larger, and preloading spring 69 can be driven to compress and slide in and out guiding axis 72, and mounting rack 7 Centrifugal force relatively reach, the pressing force of preloading spring 69 is relatively reached, bonding pad 68 is pressed on outer 65 inner wall of clutch ring, makes inner ring 61 It is combined between the relatively outer clutch ring 65 of interior clutch ring 64, i.e. the rotation of pressure gear 45 and 44 synchronous rotary of air-discharging and supercharging axis is real Increase pressure at expulsion under present high engine speeds operating condition；Under engine medium speed therebetween, clutch be in half from Conjunction state, the intervention exhaust efficiency of smaller effect.

When air inlet turbine 43 and exhaust driven gas turbine 46 act on, the air pressure at air inlet qi hole and exhaust qi hole 22 is larger, spoke Plate 54 is opposite to the recycling effect of exhaust gas to be weakened, and waste gas burning is relatively abundant when reply high engine speeds rotate, and exhaust gas follows again The feature that the function and significance of ring weakens.

It is connected between limit sleeve 63 and interior clutch ring 64 by bearing, is rotated between outer clutch ring 65 and interior clutch ring 64 Connection, is rotatablely connected between outer clutch ring 65 and type frame 62.Notch 32 is in the inclined helical form of 3 rotation direction of rotor.Notch 32 helical form setting can further improve the effect that the rotation of rotor 3 forms " vortex " to mixed gas in combustion chamber, mention High engine performance.

Synchronizing between shaft 31 and crankshaft refers to that revolving speed is identical, real by the bevel gear being fixed on crankshaft between the two The switching of existing rotation direction, it is then synchronous by the way that chain realization is arranged between shaft 31 and bevel gear.

The specific embodiments described herein are merely examples of the spirit of the present invention.The utility model institute Belonging to those skilled in the art can make various modifications or additions to the described embodiments or using similar Mode substitute, but without departing from the spirit of the present application or beyond the scope of the appended claims.

Claims (2)

1. a kind of exhaust gas recirculation type fuel engines, fuel engines includes cylinder body (1), is slidably connected in cylinder body (1) Piston (2) and the crankshaft hinged with piston (2), which is characterized in that this fuel engines includes the air inlet being provided on cylinder body (1) The top open part of discrimination hole (21) and exhaust qi hole (22), the top opening of the cylinder body (1), the cylinder body (1) has one turn The dynamic rotor (3) being connected on cylinder body (1), cylinder body (1) inner wall, piston (2) top surface and rotor (3) bottom surface are formed The center of the combustion chamber of engine, the rotor (3) is fixedly connected with a shaft (31), the shaft (31) and crankshaft-synchronous, A notch (32) for running through rotor (3) bottom wall is offered on the rotor (3), the notch (32) can be connected to air inlet qi Hole and combustion chamber or outlet qi hole and combustion chamber；The circulating slot (51) of an annular, the circulating slot are offered on the cylinder body (1) (51) it is located at air inlet qi hole and is vented the top of qi hole (22), the circulating slot (51) and the intersection intercommunication of air inlet qi hole, it is described Circulating slot (51) and exhaust qi hole (22) intersection intercommunication, are fixedly installed one on the rotor (3) and are rotatably connected on cylinder body (1) On turntable (52), the lower surface of the turntable (52) is circumferentially uniformly fixed with several installation axles (53), the installation axle (53) Upper to be rotatably connected to a disc (54) by a torsional spring, the torsional spring drives disc (54) parallel with the radial line of turntable (52), institute It states circulating slot (51) to be provided with several convex blocks (55) on the side wall of air inlet Qi Kongchu, the disc (54) can be by convex block (55) limit and rotated around corresponding installation axle (53).

2. a kind of exhaust gas recirculation type fuel engines according to claim 1, which is characterized in that the notch (32) be in The inclined helical form of rotor (3) rotation direction.