CN209875320U - Air management system of diesel engine - Google Patents
Air management system of diesel engine Download PDFInfo
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- CN209875320U CN209875320U CN201920661883.9U CN201920661883U CN209875320U CN 209875320 U CN209875320 U CN 209875320U CN 201920661883 U CN201920661883 U CN 201920661883U CN 209875320 U CN209875320 U CN 209875320U
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Abstract
The utility model discloses a diesel engine air management system, including the engine cylinder body, cylinder cap and inlet line and exhaust pipe, be equipped with the cylinder in the cylinder body, the cylinder cap both sides are equipped with inlet channel and exhaust passage, the inlet line is including the venturi intake pipe that is equipped with air flow meter, inlet connection and intake pipe, be equipped with the electron throttle valve that admits air between venturi intake pipe and the inlet connection, inlet connection is equipped with inlet pressure sensor with intake-tube connection department, exhaust pipe includes blast pipe and turbo charger, it is equipped with respectively to admit air and exhaust manifold on one side of the blast pipe to admit air and blast pipe, admit air and exhaust manifold respectively with admit air and exhaust passage connection, be equipped with the exhaust gas recirculation intake pipe of being connected with the blast pipe between blast pipe and the intake pipe, exhaust gas recirculation valve and the exhaust gas recirculation. The utility model discloses a valve in the system carries out closed-loop control to gas, realizes the thermal management to the engine, reduces the pollutant concentration in the tail gas.
Description
Technical Field
The utility model belongs to the technical field of the diesel engine and specifically relates to a diesel engine air management system is related to.
Background
At present, emission regulations are increasingly strict, and the national execution of the six-emission stage is more important for the design work of an air system of a diesel engine.
Exhaust gas from diesel engines generally contains a large amount of Nitrogen Oxide (NO)x) It is a major source of atmospheric pollution, and therefore the current exhaust aftertreatment work mainly uses Selective Catalytic Reduction (SCR) technology to reduce NOxThe content of (a). The conversion efficiency of the SCR catalyst has a direct relationship with the exhaust temperature, and catalysis is carried out at low temperatureThe efficiency is lower, and the exhaust temperature of the diesel engine is lower under the working condition of low speed and small load, so that the catalytic activity of the SCR catalyst in the aftertreatment is greatly reduced, and NO is enabledxAnd are not effectively processed.
The diesel engine in the prior art does not have a mature diesel engine air system which can reduce pollutants in exhaust and can be matched with tail gas aftertreatment for work. For example, a "diesel engine" disclosed in chinese patent document, publication No. CN1285832C discloses a diesel engine in which a flow rate adjusting device for restricting an exhaust flow rate, an intake air heating device for heating intake air, a heat medium circulating device for increasing a temperature of the diesel engine by circulating a heat medium, a reduced-cylinder operation device for performing a reduced-cylinder operation, and a fuel supply time advancing device for advancing a fuel supply time for supplying fuel to a cylinder are provided in the diesel engine, and these devices are operated at least during a period from a stage before a high-speed idling to a period close to the high-speed idling, whereby a fuel combustion state of the diesel engine can be promoted to be rapidly stabilized during a period in which an amount of fuel supplied to the cylinder is small and a combustion time of the fuel is short, and a possibility of discharge of white smoke and occurrence of engine chattering can be greatly reduced.
Therefore, the diesel engine in the prior art usually discharges high concentration of pollutants, the working efficiency of the aftertreatment of the tail gas is low under the working condition of low-speed and low-load operation, and the discharge hardly reaches the national standard.
Disclosure of Invention
The utility model relates to an it is higher to overcome the pollutant concentration that diesel engine among the prior art discharged usually, and the aftertreatment work efficiency of tail gas is low under low-speed little load operation operating mode, the problem that the emission hardly reaches national standard provides a diesel engine air management system, both can reduce the pollutant content in the exhaust emission, can cooperate tail gas aftertreatment work again, improve the aftertreatment efficiency of tail gas under the low-speed little load operation operating mode, make to discharge stably and reach national standard.
In order to achieve the above purpose, the utility model adopts the following technical scheme:
an air management system of a diesel engine comprises an engine cylinder body, a cylinder cover arranged at the top of the engine cylinder body, and an air inlet pipeline and an air outlet pipeline which are connected with the cylinder cover, wherein a plurality of cylinders are arranged in the cylinder body, air inlet channels and air outlet channels which are communicated with the cylinders are respectively arranged at the positions, corresponding to the cylinders, on the two sides of the cylinder cover, the air inlet channels and the air outlet channels are respectively connected with the air inlet pipeline and the air outlet pipeline, the air inlet pipeline comprises a Venturi air inlet pipe, an air inlet connecting pipe and an air inlet pipe which are sequentially connected, an air flow meter is arranged on the Venturi air inlet pipe, an electronic air inlet throttle valve is arranged between the Venturi air inlet pipe and the air inlet connecting pipe, an air inlet pressure sensor is arranged at the position, connected with the air inlet pipe, an air inlet manifold corresponding to each, exhaust manifold that each exhaust passage on the cylinder cap corresponds is equipped with to blast pipe one side, and exhaust manifold is connected with exhaust passage, is equipped with exhaust gas recirculation system between blast pipe and the intake pipe, and exhaust gas recirculation system is connected with the blast pipe including exhaust gas recirculation intake pipe, exhaust gas recirculation valve and the exhaust gas recirculation outlet duct that connects gradually, exhaust gas recirculation intake pipe, and exhaust gas recirculation outlet duct is connected with the intake pipe.
When the engine works, air enters an engine cylinder from the air inlet pipeline to be combusted with diesel oil, and combusted gas is discharged through the exhaust pipeline and enters a subsequent tail gas post-processing unit to be post-processed. The utility model discloses set up exhaust gas recirculation system between intake pipe and blast pipe, partly get into exhaust gas recirculation intake pipe under exhaust gas recirculation valve's effect through blast pipe exhaust waste gas, get into the intake pipe through exhaust gas recirculation outlet duct, get into engine cylinder with fresh air mixing and participate in the burning again. The burnt waste gas is mixed with fresh air to be combusted again, so that the oxygen concentration of the mixed gas can be reduced, the heat released by combustion can be absorbed, the combustion speed is reduced, the combustion temperature is reduced, and NO can be effectively reducedxThe concentration of the pollutants is reduced.
However, the arrangement of an exhaust gas recirculation system can reduce the combustion temperature and lead to the engineThe exhaust temperature is too low under the working condition of low-speed and low-load operation, so that the catalytic activity of the SCR catalyst in the subsequent tail gas aftertreatment process is greatly reduced, and NO is causedxThe tail gas cannot be effectively treated, and the tail gas emission cannot reach the standard.
Therefore the utility model discloses set up air flow meter again in the venturi intake pipe on the basis that sets up exhaust gas recirculation system, set up electron air inlet throttle valve between venturi intake pipe and air inlet connection, set up inlet pressure sensor in air inlet connection and intake-tube connection department, utilize electron air inlet throttle valve and exhaust gas recirculation valve to adjust the air input that gets into in the engine cylinder, utilize air flow meter and inlet pressure sensor to monitor the air input simultaneously and arrange the design, through the real-time actual air input of perception engine of air flow meter, and compare with the settlement air input of engine, come real-time adjustment through exhaust gas recirculation valve opening size, reach closed-loop control's purpose. Meanwhile, the control of the electronic air inlet throttle valve is introduced, the electronic air inlet throttle valve and an air inlet pressure sensor arranged on an air inlet connecting pipe are subjected to closed-loop control, the air inlet amount is adjusted through the opening degree of the electronic air inlet throttle valve, so that the air-fuel ratio is controlled, the exhaust temperature is adjusted, the engine is subjected to heat management, the exhaust temperature of the engine under the low-speed and low-load operation working condition is improved, the catalytic activity of an SCR (selective catalytic reduction) catalyst in the tail gas aftertreatment process is notxThe treatment efficiency of the method ensures that the exhaust emission reaches the national standard.
The turbocharger utilizes the inertia impulse force of the exhaust gas discharged by the engine to push a turbine in a turbine chamber, the turbine drives a coaxial impeller, and the impeller compresses and conveys air to enter a cylinder through an air inlet pipe after being pressurized. After setting up exhaust gas recirculation system, because the improvement of turbo charger efficiency, the inlet pressure behind the turbo charger can be higher than the exhaust pressure before the turbo charger under many circumstances, causes exhaust gas recirculation's difficulty, consequently the utility model discloses use the venturi intake pipe in the air intake pipe, utilize the step-down effect of venturi intake pipe, before improving exhaust gas recirculation valve and the pressure differential of venturi intake pipe throat, make exhaust gas recirculation go on smoothly. (the air flow meter, the electronic air inlet throttle valve, the air inlet pressure sensor, the exhaust gas recirculation valve and the turbocharger are conventional devices in the field, and are not important in the utility model)
Preferably, an exhaust gas recirculation cooler is arranged between the exhaust gas recirculation valve and the exhaust gas recirculation outlet pipe. Because the waste gas after the burning produces the comdenstion water with low temperature fresh air easily at the mixing process, the compressor blade of turbo charger can be strikeed to the comdenstion water, leads to the compressor inefficacy, consequently the utility model discloses set up exhaust gas recirculation cooler between exhaust gas recirculation valve and exhaust gas recirculation outlet duct, cool off back waste gas and mix with fresh air again, reduce the production of comdenstion water, avoid damaging turbo charger.
Preferably, the middle parts of the exhaust gas recirculation inlet pipe and the exhaust gas recirculation outlet pipe are provided with a section of telescopic corrugated pipe. The middle parts of the exhaust gas recirculation air inlet pipe and the exhaust gas recirculation air outlet pipe are provided with the telescopic corrugated pipes, so that the arrangement of the exhaust gas recirculation system is suitable for different engine arrangement spaces, the structure is simple, the space is saved, the maintenance is convenient, and the arrangement of the exhaust gas recirculation system is facilitated.
Preferably, the turbocharger is provided with a waste gate valve. When the engine runs at a low rotating speed, the outlet pressure of a gas compressor in the turbocharger is low, the waste gas bypass valve is closed, and all the waste gas discharged by the engine passes through the turbine end of the turbocharger, so that the rotating speed of the turbine is increased, a large air inlet supercharging pressure can be generated, the air inlet amount is increased, and the low-speed and small-load performance of the engine is improved; when the engine runs at a high speed, the supercharged intake pressure exceeds a certain value, the supercharged gas jacks up a diaphragm in the exhaust actuator of the waste gas bypass valve to drive a pull rod of the waste gas bypass valve to move, and the waste gas bypass valve is opened, so that part of the waste gas is directly discharged into the atmosphere from an exhaust channel of the waste gas bypass valve without passing through a turbine end of the supercharger, the inlet flow of the turbine is reduced, the pressure is reduced, and the supercharged pressure is reduced. The device has the function of assisting in controlling the air inlet pressure and the air inlet amount, so that the exhaust emission is controlled.
Preferably, a plurality of mounting holes which are uniformly distributed are formed in the positions, corresponding to the cylinders, of the edges of the two sides of the cylinder cover, and the cylinder cover is connected with the engine cylinder body through fastening bolts penetrating through the mounting holes. The arrangement of the fastening bolts of the cylinder cover has a close relation to the stress condition of the automobile cylinder cover, the deformation of the cylinder holes and the reliability of the sealing gasket of the automobile cylinder cover, the quantity of the fastening bolts is proper, the distance from the fastening bolts to the edge of the cylinder is as short as possible, the distributed load of each fastening bolt is ensured to be as uniform as possible, and the cylinder cover is not pulled and deformed by the fastening bolts.
Preferably, a water channel hole for arranging a water channel, a valve guide pipe hole for installing a valve guide pipe and an oil injector hole for installing an oil injector which are longitudinally arranged are respectively arranged between a mounting hole close to one side of the exhaust pipe and a mounting hole close to one side of the air inlet pipe corresponding to each cylinder, push rod holes for installing push rods are respectively arranged on two transverse sides of each mounting hole close to one side of the exhaust pipe, a rocker arm seat mounting surface is arranged on one transverse side of the water channel hole, the valve guide pipe holes comprise an inlet valve guide pipe hole and an exhaust valve guide pipe hole, the inlet valve guide pipe hole and the exhaust valve guide pipe hole are transversely positioned on a straight line, and a glow plug mounting hole is arranged on one transverse side of the oil.
The cylinder cap receives high temperature high pressure gas effect, bears very big fastening bolt's pretightning force, leads to mechanical stress big, and the cylinder cap structure is complicated, if the temperature field is serious inhomogeneous, leads to thermal stress big, can cause the cylinder cap to appear crackle and whole deformation, therefore the rational arrangement of cylinder cap is very important. The utility model provides a cylinder cap is arranged rationally, and the temperature field is even, can guarantee the working property of engine.
Preferably, the intake connecting pipe and the intake pipe are respectively provided with a connecting pipe flange, the connecting pipe flanges on the intake connecting pipe and the intake pipe are connected through a fixed bolt and a nut, the ends of the intake manifold and the exhaust manifold are respectively provided with a manifold flange, the intake passage and the exhaust passage on the manifold flange and the cylinder cover are respectively provided with a connecting hole corresponding to the manifold flange, and the intake manifold and the exhaust manifold are respectively connected with the intake passage and the exhaust passage through the fixed bolt and the nut which penetrate through the connecting holes. The air inlet manifold and the air inlet pipe are connected by the connecting pipe flange, so that the installation is convenient and rapid, the installation efficiency is high, the connection is firm and reliable, and air leakage is not easy. Set up the manifold flange on air intake manifold and exhaust manifold, can realize quick counterpoint during the installation, installation easy operation, the installation effectiveness is high, and convenient to detach and maintenance.
Therefore, the utility model discloses following beneficial effect has:
(1) an exhaust gas recirculation system is arranged between the air inlet pipe and the exhaust pipe, the combusted exhaust gas is mixed with fresh air to be combusted again, the oxygen-containing concentration of the mixed gas can be reduced, the heat released by combustion can be absorbed, the combustion speed is reduced, the combustion temperature is reduced, and therefore NO can be effectively reducedxReducing the concentration of pollutants;
(2) the method comprises the following steps of adjusting air inflow entering an engine cylinder by using an electronic air inflow throttle valve and an exhaust gas recirculation valve, monitoring the air inflow by using an air flow meter and an air inflow pressure sensor, and the like, sensing the actual air inflow of the engine in real time through the air flow meter, comparing the actual air inflow with the set air inflow of the engine, and adjusting the actual air inflow in real time through the opening of the exhaust gas recirculation valve to achieve the purpose of closed-loop control; meanwhile, the control of the electronic air inlet throttle valve is introduced, the electronic air inlet throttle valve and an air inlet pressure sensor arranged on an air inlet connecting pipe are subjected to closed-loop control, the air inlet amount is adjusted through the opening degree of the electronic air inlet throttle valve, the heat management is carried out on the engine, the exhaust temperature of the engine under the low-speed and low-load operation working condition is improved, the catalytic activity of an SCR (selective catalytic reduction) catalyst in the tail gas aftertreatment process is not influenced, and thexThe treatment efficiency of the method ensures that the exhaust emission reaches the national standard;
(3) a Venturi air inlet pipe is used in the air inlet pipeline, and the pressure difference between the front part of the exhaust gas recirculation valve and the throat of the Venturi air inlet pipe is improved by utilizing the pressure reduction effect of the Venturi air inlet pipe, so that the exhaust gas recirculation can be smoothly carried out;
(4) an exhaust gas recirculation cooler is arranged between the exhaust gas recirculation valve and the exhaust gas recirculation outlet pipe, and the exhaust gas is cooled and then mixed with fresh air, so that the generation of condensed water is reduced, and the turbocharger is prevented from being damaged.
Drawings
Fig. 1 is a plan view of the present invention.
In the figure: 1 cylinder cover, 101 air inlet channel, 102 air outlet channel, 103 mounting hole, 104 push rod hole, 105 water channel hole, 106 valve guide pipe hole, 107 injector hole, 108 rocker arm seat mounting surface, 109 glow plug mounting hole, 2 Venturi air inlet pipe, 3 air flow meter, 4 electronic air inlet throttle valve, 5 air inlet connecting pipe, 501 connecting pipe flange, 6 air inlet pressure sensor, 7 air inlet pipe, 701 air inlet manifold, 8 air outlet pipe, 801 air outlet manifold, 802 manifold flange, 9 turbocharger, 901 waste gas bypass valve, 10 waste gas recirculation air inlet pipe, 11 waste gas recirculation valve, 12 waste gas recirculation cooler, 13 waste gas recirculation air outlet pipe.
Detailed Description
The present invention will be further described with reference to the accompanying drawings and the detailed description.
The utility model discloses air flow meter, electron air intake choke valve, inlet pressure sensor, exhaust gas recirculation valve, exhaust gas recirculation cooler, turbo charger, waste gas bypass valve etc. that use in are the conventional device in this field, not the utility model discloses a key.
Example (b):
in the embodiment shown in fig. 1, the air management system for the four-cylinder diesel engine comprises an engine block, a cylinder head 1 arranged at the top of the engine block, and an air inlet pipeline and an exhaust pipeline which are connected with the cylinder head.
The cylinder body is internally provided with four cylinders, the two sides of the cylinder cover 1 are respectively provided with four air inlet channels 101 and four exhaust channels 102 which are communicated with the cylinders and correspond to the cylinders, the edges of the two sides of the cylinder cover are respectively provided with a mounting hole 103 corresponding to the cylinders, the two sides of the cylinder cover are respectively provided with four mounting holes which are uniformly distributed, and the cylinder cover is connected with the engine cylinder body through fastening bolts which pass through the mounting holes. A water channel hole 105 used for arranging a water channel, a valve guide pipe hole 106 used for installing a valve guide pipe and an oil injector hole 107 used for installing an oil injector which are longitudinally arranged are respectively arranged between a mounting hole which is close to one side of an air exhaust channel and a mounting hole which is close to one side of an air inlet channel and correspond to each air cylinder, push rod holes 104 used for installing push rods are respectively arranged on the left side and the right side of each mounting hole which is close to one side of the air exhaust channel, a rocker arm seat mounting surface 108 is arranged on the right side of the water channel hole, the valve guide pipe holes comprise an air inlet valve guide pipe hole and an air exhaust valve guide pipe hole, the air inlet valve guide pipe hole and the air exhaust valve guide pipe.
The air inlet pipeline comprises a Venturi air inlet pipe 2, an air inlet connecting pipe 5 and an air inlet pipe 7 which are connected in sequence, an air flow meter 3 is arranged on the Venturi air inlet pipe, an electronic air inlet throttle valve 4 is arranged between the Venturi air inlet pipe and the air inlet connecting pipe, a connecting pipe flange 501 is arranged on one end of the air inlet connecting pipe and the air inlet pipe respectively, the air inlet connecting pipe and the connecting pipe flange on the air inlet pipe are connected through a fixing bolt and a nut, an air inlet pressure sensor 6 is arranged at the connection position of the air inlet connecting pipe and the air inlet pipe, an air inlet manifold 701 corresponding to four air inlet channels on a cylinder cover is arranged on one side, close to the cylinder cover, of the air inlet pipe, a manifold flange 802 is arranged at the end part of the air inlet manifold, the air inlet channels on.
The exhaust pipeline comprises an exhaust pipe 8 and a turbocharger 9, one side of the exhaust pipe, which is close to the cylinder cover, is provided with an exhaust manifold 807 corresponding to four exhaust passages on the cylinder cover, the end part of the exhaust manifold is provided with a manifold flange 802, the exhaust passages on the manifold flange and the cylinder cover are provided with connecting holes corresponding to the manifold flange, and the exhaust manifold is connected with the corresponding exhaust passages through fixing bolts and nuts penetrating through the connecting holes.
The turbocharger consists of a turbine chamber and a supercharger, wherein an air inlet of the turbine chamber is connected with an exhaust manifold of the engine, and an exhaust port of the turbine chamber is connected to an exhaust pipe; the air inlet of the supercharger is connected with an air inlet pipeline of fresh air, the air outlet is connected to an air inlet pipe, a turbine and an impeller are respectively arranged in a turbine chamber and the supercharger and are coaxially and rigidly connected, and a waste gas bypass valve 901 is further arranged on the turbocharger and comprises an exhaust actuator and a pull rod connected with the exhaust actuator.
Be equipped with exhaust gas recirculation system between blast pipe and the intake pipe, exhaust gas recirculation system is including the exhaust gas recirculation intake pipe 10 that connects gradually, exhaust gas recirculation valve 11, exhaust gas recirculation cooler 12 and exhaust gas recirculation outlet duct 13, exhaust gas recirculation intake pipe is connected with the blast pipe through flange, exhaust gas recirculation outlet duct is connected with the intake pipe through the flange, exhaust gas recirculation intake pipe and exhaust gas recirculation outlet duct's middle part is equipped with one section telescopic bellows.
When the diesel engine works, fresh air sequentially enters an engine cylinder through the Venturi air inlet pipe, the air inlet connecting pipe, the air inlet pipe and the air inlet manifold to support diesel oil to be combusted, and combusted waste gas enters the exhaust pipe through the exhaust manifold.
A part of the exhaust gas entering the exhaust pipe enters a turbocharger, the turbocharger pushes a turbine in a turbine chamber by using the inertia impulsive force of the exhaust gas, the turbine drives a coaxial impeller, the impeller compresses and conveys air from an air inlet pipeline of fresh air, the air enters an air cylinder after being pressurized, and the exhaust gas is discharged into a tail gas post-processing unit for post-processing. When the engine runs at a low rotating speed, the pressure of outlet gas in the turbocharger is low, the waste gas bypass valve is closed, and all waste gas discharged by the engine passes through the turbine end of the turbocharger, so that the rotating speed of the turbine is increased, a large air inlet supercharging pressure can be generated, the air inlet amount is increased, and the low-speed and small-load performance of the engine is improved; when the engine runs at a high speed, the supercharged intake pressure exceeds a certain value, the supercharged gas jacks up a diaphragm in the exhaust actuator of the waste gas bypass valve to drive a pull rod of the waste gas bypass valve to move, and the waste gas bypass valve is opened, so that part of the waste gas is directly discharged into the atmosphere from an exhaust channel of the waste gas bypass valve without passing through a turbine end of the supercharger, the inlet flow of the turbine is reduced, the pressure is reduced, and the supercharged pressure is reduced.
And the other part of the exhaust gas entering the exhaust pipe enters an exhaust gas recirculation air inlet pipe under the action of an exhaust gas recirculation valve, is cooled by an exhaust gas recirculation cooler, then enters the air inlet pipe through an exhaust gas recirculation air outlet pipe, is mixed with fresh air, enters an engine cylinder and then participates in combustion. Can reduce the oxygen concentration of the mixed gas, absorb the heat released by combustion, slow the combustion speed and reduce the combustion temperature, thereby effectively reducing NOxThe concentration of the pollutants is reduced.
Entering engine cylinder by using electronic air inlet throttle valve and exhaust gas recirculation valve pairThe air inflow in the engine is adjusted, meanwhile, the air flow meter and the air inflow pressure sensor are used for monitoring the air inflow and the like, the actual air inflow of the engine is sensed in real time through the air flow meter, the actual air inflow is compared with the set air inflow of the engine, the opening of the exhaust gas recirculation valve is adjusted in real time, and the purpose of closed-loop control is achieved. Meanwhile, the control of the electronic air inlet throttle valve is introduced, the electronic air inlet throttle valve and an air inlet pressure sensor arranged on an air inlet connecting pipe are subjected to closed-loop control, the air inlet amount is adjusted through the opening degree of the electronic air inlet throttle valve, so that the air-fuel ratio is controlled, the exhaust temperature is adjusted, the engine is subjected to heat management, the exhaust temperature of the engine under the low-speed and low-load operation working condition is improved, the catalytic activity of an SCR (selective catalytic reduction) catalyst in the tail gas aftertreatment process is notxThe treatment efficiency of the method ensures that the exhaust emission reaches the national standard.
Claims (7)
1. An air management system of a diesel engine comprises an engine cylinder body, a cylinder cover (1) arranged at the top of the engine cylinder body, and an air inlet pipeline and an air outlet pipeline which are connected with the cylinder cover, and is characterized in that a plurality of cylinders are arranged in the cylinder body, air inlet channels (101) and air outlet channels (102) which are communicated with the cylinders are respectively arranged at the positions, corresponding to the cylinders, of the two sides of the cylinder cover, the air inlet channels and the air outlet channels are respectively connected with the air inlet pipeline and the air outlet pipeline, the air inlet pipeline comprises a Venturi air inlet pipe (2), an air inlet connecting pipe (5) and an air inlet pipe (7) which are sequentially connected, an air flow meter (3) is arranged on the Venturi air inlet pipe, an electronic air inlet throttle valve (4) is arranged between the Venturi air inlet pipe and the air inlet connecting pipe, an air inlet pressure sensor (6) is arranged at the connection, intake manifold is connected with inlet channel, exhaust pipe includes blast pipe (8) and turbo charger (9) of setting on the blast pipe, blast pipe one side is equipped with exhaust manifold (801) that correspond with each exhaust passage on the cylinder cap, exhaust manifold is connected with exhaust passage, be equipped with exhaust gas recirculation system between blast pipe and the intake pipe, exhaust gas recirculation system is including exhaust gas recirculation intake pipe (10), exhaust gas recirculation valve (11) and exhaust gas recirculation outlet duct (13) that connect gradually, exhaust gas recirculation intake pipe is connected with the blast pipe, exhaust gas recirculation outlet duct is connected with the intake pipe.
2. The diesel engine air management system according to claim 1, wherein an exhaust gas recirculation cooler (12) is provided between said exhaust gas recirculation valve and said exhaust gas recirculation outlet duct.
3. The diesel engine air management system according to claim 1 or 2 wherein a length of flexible bellows is provided intermediate the egr inlet and egr outlet.
4. A diesel engine air management system according to claim 1 or 2, wherein said turbocharger is provided with a wastegate valve (901).
5. The diesel engine air management system according to claim 1 or 2, wherein a plurality of mounting holes (103) are uniformly distributed on both side edges of the cylinder cover corresponding to each cylinder, and the cylinder cover and the engine block are connected by fastening bolts passing through the mounting holes.
6. The air management system of the diesel engine according to claim 5, wherein a water channel hole (105) for arranging a water channel, a valve guide pipe hole (106) for installing a valve guide pipe and an injector hole (107) for installing an injector are longitudinally arranged from a mounting hole at a side close to the exhaust pipe to a mounting hole at a side close to the intake pipe corresponding to each cylinder, push rod holes (104) for installing push rods are respectively arranged at two lateral sides of each mounting hole at a side close to the exhaust pipe, a rocker arm seat mounting surface (108) is arranged at one lateral side of the water channel hole, the valve guide pipe holes comprise an intake valve guide pipe hole and an exhaust valve guide pipe hole, the intake valve guide pipe hole and the exhaust valve guide pipe hole are horizontally aligned, and a glow plug mounting hole (109) is arranged at one lateral side of the injector hole.
7. The air management system of the diesel engine according to claim 1 or 2, wherein a pipe connecting flange (501) is respectively arranged on one end of the air inlet connecting pipe and one end of the air inlet pipe, the pipe connecting flanges on the air inlet connecting pipe and the air inlet pipe are connected through a fixing bolt and a nut, a manifold flange (802) is respectively arranged on the end portions of the air inlet manifold and the air outlet manifold, connecting holes are respectively arranged on the manifold flange and the air inlet channel and the air outlet channel on the cylinder cover corresponding to the manifold flange, and the air inlet manifold and the air outlet manifold are respectively connected with the air inlet channel and the air outlet channel through the fixing bolt and the nut which penetrate through the connecting.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661883.9U CN209875320U (en) | 2019-05-09 | 2019-05-09 | Air management system of diesel engine |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920661883.9U CN209875320U (en) | 2019-05-09 | 2019-05-09 | Air management system of diesel engine |
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| CN209875320U true CN209875320U (en) | 2019-12-31 |
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| CN201920661883.9U Active CN209875320U (en) | 2019-05-09 | 2019-05-09 | Air management system of diesel engine |
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