CN208778090U - Improve the gas engine of exhaust utilization rate - Google Patents

Abstract

The utility model discloses a kind of gas engines for improving exhaust utilization rate, including the electronic control unit ECU for controlling engine operation, the inlet manifold and exhaust manifold being connected on cylinder, the inlet end of inlet manifold is connected with air inlet pipe, turbocharger is provided between the outlet side of exhaust manifold and the inlet end of air inlet pipe, intercooler is connected in turn along gas direction of travel in air inlet pipe, air throttle and fuel gas mixer, compressed air energy recyclable device is connected in air inlet pipe, the inlet end of cylinder is equipped with pressure-detecting device, electronic control unit ECU is connected to Air to air ERV device, pressure-detecting device and air throttle.ECU control triple valve shunts the compressed air passed through, air is partially compressed and is passed through air throttle through intercooler, residual compression air enters compressed air energy recyclable device, when engine dashes forward load removal, compressed air enters compressed air energy recyclable device, effectively prevents surge.

Description

Improve the gas engine of exhaust utilization rate

Technical field

The utility model relates to a kind of engine control systems more particularly to a kind of combustion gas for improving exhaust utilization rate to start Machine.

Background technique

Natural gas engine air inflow is an important factor for influencing engine power, torque: air inflow is more, can participate in The gaseous mixture of burning is more, and corresponding engine acting also can be more.The size of admission pressure determine air inflow number, pass through Natural gas engine admission pressure is controlled, to control engine power, torque output size, meets driving and requires.

Existing natural gas engine controlled by exhaust gas control valve push turbocharger operation exhausted air quantity how much, And then boost pressure size is controlled, cooling in air process after pressurization, then by air throttle, further accurately control enters Mixture pressure in cylinder, so that output meets power, the torque of target.This process is not that all waste gases can push turbine to increase Depressor acting, extra exhaust gas are expelled directly out turbocharger, exhaust energy are caused to waste.

The existing entire admission pressure control process of natural gas engine is cumbersome, and ECU controls exhaust gas control valve opening size, And then control turbocharger deflation valve opening size and bleed off extra exhaust gas, remainder of exhaust gas pushes turbocharger compresses air to arrive Target value, entire control process is cumbersome, causes natural gas engine response sensitivity poor.

Existing natural gas engine, especially high-powered engine, when prominent load removal, are easy to produce surge phenomenon, must plus Surge valve is filled, makes system complex, cost is higher.

Utility model content

The technical problem to be solved by the utility model is to provide one kind can make full use of natural gas engine exhaust gas energy Amount promotes engine response sensitivity, while effectively eliminating the gas engine of the raising exhaust utilization rate of surge.

In order to solve the above technical problems, the technical solution of the utility model is: the gas engine of exhaust utilization rate is improved, Including the electronic control unit ECU for controlling engine operation, the inlet manifold being connected on cylinder and exhaust manifold, institute The inlet end for stating inlet manifold is connected with air inlet pipe, sets between the outlet side of the exhaust manifold and the inlet end of the air inlet pipe It is equipped with turbocharger, is connected with intercooler, air throttle and fuel gas mixer in turn along gas direction of travel in the air inlet pipe, Compressed air energy recyclable device is connected in the air inlet pipe, the inlet end of the cylinder is equipped with pressure detecting dress It sets, the electronic control unit ECU is connected to the Air to air ERV device, the pressure-detecting device and the air throttle.

The compressed air energy recyclable device includes connecting with the electronic control unit ECU as a preferred technical solution, Triple valve, the triple valve inlet end connection institute's turbocharger outlet side, the triple valve an exhaust outlet connection To the inlet end of the intercooler, another exhaust outlet of the triple valve is connected with gas driven generator.

The electric energy output end of the gas driven generator is connected with battery as a preferred technical solution,.

The pressure-detecting device includes being mounted in the air inlet pipe to be located at the solar term as a preferred technical solution, Air pressure probe between door air inlet side and the intercooler and the mixture pressure that is mounted in the inlet manifold Sensor, the air pressure probe and the mixture pressure sensor are respectively connected to the electronic control unit ECU.

By adopting the above-described technical solution, the exhaust gas being discharged from cylinder block pushes turbocharger acting, turbine increases Depressor compresses the air sucked in air inlet pipe, and ECU control triple valve as needed shunts the compressed air passed through, part Compressed air is passed through air throttle after intercooler is cooling, and the air supply into intercooler directly adjusts pressure before air throttle, Engine response sensitivity is promoted, residual compression air enters compressed air energy recyclable device and carries out energy regenerating, ECU control Air throttle carries out secondary accurate adjusting to admission pressure；When engine dashes forward load removal, compressed air enters compressed air energy Recyclable device effectively prevents surge while recovering energy.

Detailed description of the invention

Following drawings are only intended to schematically illustrate and explain the present invention, does not limit the model of the utility model It encloses.Wherein:

Fig. 1 is the structural schematic diagram of the utility model.

In figure: 1- inlet manifold；2- exhaust manifold；3- air inlet pipe；4- turbocharger；5- intercooler；6- air throttle； 7- fuel gas mixer；8- triple valve；9- gas driven generator；10- air pressure probe；11- mixture pressure sensor.

Specific embodiment

With reference to the accompanying drawings and examples, the utility model is further described.In the following detailed description, only pass through Bright mode describes certain exemplary embodiments of the utility model.Undoubtedly, those skilled in the art can be with It recognizes, it, can be with a variety of different modes to described without departing from the spirit and scope of the utility model Embodiment is modified.Therefore, attached drawing and description are regarded as illustrative in nature, rather than the protection for limiting claim Range.

As shown in Figure 1, the gas engine of exhaust utilization rate is improved, including the electronic control unit for controlling engine operation ECU, the inlet manifold 1 being connected on cylinder and exhaust manifold 2, the inlet end of the inlet manifold 1 are connected with air inlet Pipe 3 is provided with turbocharger 4, the air inlet between the outlet side of the exhaust manifold 2 and the inlet end of the air inlet pipe 3 Intercooler 5, air throttle 6 and fuel gas mixer 7 are connected in turn along gas direction of travel on pipe 3, are connected in the air inlet pipe 3 Compressed air energy recyclable device, the inlet end of the cylinder are equipped with pressure-detecting device, the electronic control unit ECU It is connected to the Air to air ERV device, the pressure-detecting device and the air throttle 6.

As shown in Figure 1, the compressed air energy recyclable device includes the triple valve 8 connecting with the electronic control unit ECU, The inlet end of the triple valve 8 is connected to the outlet side of the turbocharger 4, and an exhaust outlet of the triple valve 8 is connected to institute The inlet end of intercooler 5 is stated, another exhaust outlet of the triple valve 8 is connected with gas driven generator 9.The setting of triple valve 8 exists Before intercooler 5, compressed air is entered by 8 import of triple valve, is discharged respectively through two outlets after shunting, cold in direct regulation and control entrance The compressed air require of device 5, and then engine is controlled, promote engine response sensitivity；Residual compression air fully enters institute Compressed air energy recyclable device is stated, energy regenerating is carried out, promotes exhaust energy utilization rate, energy conservation and environmental protection.It is unloaded when engine is prominent When load, compressed air enters compressed air energy recyclable device, and surge is effectively prevented while recovering energy.

As shown in Figure 1, the electric energy output end of the gas driven generator 9 is connected with battery, for storing the pneumatic hair The electricity that motor 9 generates, for the use of other components.

As shown in Figure 1, the pressure-detecting device includes being mounted in the air inlet pipe 3 to be located at 6 air inlet of air throttle Air pressure probe 10 between side and the intercooler 5 and the mixture pressure being mounted in the inlet manifold 1 pass Sensor 11, the air pressure probe 10 and the mixture pressure sensor 11 are respectively connected to the electronic control unit ECU.The air pressure probe 10 and the mixture pressure sensor 11 are by pressure before air throttle 6 and cylinder air inlet pressure Power Real-time Feedback gives electronic control unit ECU, and assist electronic control unit ECU controls air flow device and air throttle 6, to adjust cylinder Admission pressure meets job requirement.

The advantages of basic principles and main features and the utility model of the utility model have been shown and described above.Current row The technical staff of industry is described in above embodiments and description it should be appreciated that the present utility model is not limited to the above embodiments Only illustrate the principles of the present invention, on the premise of not departing from the spirit and scope of the utility model, the utility model is also It will have various changes and improvements, these various changes and improvements fall within the scope of the claimed invention.The utility model Claimed range is defined by the appending claims and its equivalent thereof.

Claims (4)

1. improving the gas engine of exhaust utilization rate, including the electronic control unit ECU for controlling engine operation, it is connected to hair Inlet manifold and exhaust manifold on motivation cylinder, the inlet end of the inlet manifold are connected with air inlet pipe, in the air inlet pipe Intercooler, air throttle and fuel gas mixer are connected in turn along gas direction of travel, the outlet side of the exhaust manifold and described Turbocharger is provided between the inlet end of air inlet pipe, it is characterised in that: is connected with compressed air energy in the air inlet pipe Recyclable device, the inlet end of the cylinder are equipped with pressure-detecting device, and the electronic control unit ECU is connected to the sky Gas energy recycle device, the pressure-detecting device and the air throttle.

2. the gas engine as described in claim 1 for improving exhaust utilization rate, it is characterised in that: the compressed air energy Recyclable device includes the triple valve connecting with the electronic control unit ECU, and the inlet end of the triple valve is connected to the turbocharging The outlet side of device, an exhaust outlet of the triple valve are connected to the inlet end of the intercooler, another exhaust of the triple valve Mouth is connected with gas driven generator.

3. the gas engine as claimed in claim 2 for improving exhaust utilization rate, it is characterised in that: the gas driven generator Electric energy output end is connected with battery.

4. the gas engine as claimed in claim 1,2 or 3 for improving exhaust utilization rate, it is characterised in that: the pressure inspection Surveying device includes that the air pressure being mounted in the air inlet pipe between the throttle inflow side and the intercooler passes Sensor and the mixture pressure sensor being mounted in the inlet manifold, the air pressure probe and the gaseous mixture Pressure sensor is respectively connected to the electronic control unit ECU.