CN103365315A

CN103365315A - Adjusting device for intake air temperature

Info

Publication number: CN103365315A
Application number: CN201310294662XA
Authority: CN
Inventors: 赵春生; 刘艳利
Original assignee: China North Engine Research Institute Tianjin
Current assignee: China North Engine Research Institute Tianjin
Priority date: 2013-07-12
Filing date: 2013-07-12
Publication date: 2013-10-23

Abstract

The invention discloses an adjusting device for intake air temperature. The adjusting device comprises a compressor air outlet pipe (1), an intercooler (2), an intercooler air outlet pipe (3), a magnetic valve (4), a by-pass pipe (5) and an ECU (6) used for controlling the opening degree of the magnetic valve (4), wherein the magnetic valve (4) is installed in the by-pass pipe (5), and the two ends of the by-pass pipe (5) are communicated with the compressor air outlet pipe (1) and the intercooler air outlet pipe (3) respectively. The adjusting device for the intake air temperature is simple in structure, the low-loading working condition of a diesel engine and the intake air temperature when environment temperature is low are improved by the additional arrangement of the air intake by-pass pipe and the magnetic valve, the performance of the diesel engine is improved, and the environmental adaptation of the diesel engine is enhanced.

Description

A kind of intake air temperature regulating device

Technical field

The invention belongs to the technical field of diesel engine, be specifically related to a kind of intake air temperature regulating device.

Background technology

Along with improving constantly of diesel engine power demand, and the increasingly stringent of Abgasgesetz, extensively adopt the charge inter cooling technology on the diesel engine, its objective is increases the air inlet charge, improves burning performance.

For turbocharged and intercooled diesel engine, the flow that enters the fuel and air mixture in the cylinder has determined the size of diesel engine power, therefore can come hoisting power by improving density of the induced air.

Application number be 201010141298.X Patent Application Publication a kind of intake air temperature pressure adjustment assembly of diesel engine, comprise air inlet temperature regulating unit and inlet pressure adjusting valve; Air inlet temperature regulating unit comprises that a flue gas heat-exchange unit, an air go out pipe, two air inlet pipes, an inlet air flow area governor motion, and flue gas heat-exchange unit comprises smoke inlet pipe and heat interchanger air inlet and the heat interchanger air gas outlet that is connected with heat exchanger tube; Smoke inlet pipe is connected with the flue gas discharge opening of diesel engine by pipeline; Air goes out pipe and is docked at bottom, heat interchanger air gas outlet; Two air inlet pipes are separately positioned on the flue gas heat-exchange unit both sides, and its bottom goes out pipe with air respectively and is communicated with, have energy savings and to diesel engine intake carry out temperature-adjustment pressure-adjustment, simulated high altitude, the advantage of dive usefulness or other pressure and temp environment.But the technical scheme of this patent disclosure has adopted the scheme of engine exhaust heating air inlet, improves intake air temperature and pressure when being applicable to test, and also has the defective that equipment is complicated, resistance is large, intake air temperature is difficult to accurate control simultaneously.

Turbocharged and intercooled diesel engine ultimate principle and structure as shown in Figure 1, usually the design of diesel engine charge air cooler is that control calibration point intake air temperature is about 50 ℃.But when environment temperature is low, or diesel engine is under the lower operating mode of boost pressure, and charge air cooler will to the air inlet sub-cooled, so that diesel engine compression finishing temperature is lower, cause diesel engine ignition lag, burn deterioration.

Summary of the invention

When lower or diesel engine supercharging pressure was low for environment temperature, charge air cooler caused supercooled technical matters to air inlet, the invention provides a kind of intake air temperature regulating device.

The present invention can be achieved through the following technical solutions:

A kind of intake air temperature regulating device, comprise pneumatic plant escape pipe 1, charge air cooler 2, intercooler air outlet pipe 3, the ECU6 that also comprises the aperture of solenoid valve 4 and by-pass pipe 5 and control solenoid valve 4, described solenoid valve 4 is installed in the by-pass pipe 5, and described by-pass pipe 5 two ends are communicated with pneumatic plant escape pipe 1 and intercooler air outlet pipe 3 respectively.

The present invention compared with prior art has following beneficial effect: the present invention is simple in structure, by increasing air inlet by-pass pipe and solenoid valve, improve diesel engine running on the lower load and the environment temperature intake air temperature when low, improved diesel engine performance, strengthened the environmental suitability of diesel engine.

Description of drawings

Fig. 1 is the structural drawing of diesel engine ICS intercooler system

Fig. 2 is intake air temperature regulating device structural drawing

Fig. 3 is the intake air temperature regulating device structural drawing with control system

Embodiment

Variation according to environment temperature and diesel engine condition, automatically controlled ECU is by control solenoid valve aperture, change directly enters inlet manifold's air capacity from by-pass pipe without the charge air cooler cooling, thereby cold rear temperature in the assurance optimum, prevent that intake air temperature is excessively low, the Optimizing Combustion process improves diesel engine performance and emission level.

Install and set-up procedure:

As shown in Figure 2, carrying out system installs.Carry out the demarcation of solenoid valve aperture control Map by overall test, completion system optimization, thereby guarantee optimum in cold rear temperature, reach the Optimizing Combustion process, further improve diesel engine performance and emission level, improve the purpose of environmental suitability.

A kind of intake air temperature regulating device comprises pneumatic plant escape pipe 1, charge air cooler 2, intercooler air outlet pipe 3, solenoid valve 4 and by-pass pipe 5 and the ECU6 that controls the aperture of solenoid valve 4, also comprises the temperature sensor 7 of measuring inlet manifold's Inside Air Temperature; Described solenoid valve 4 is installed in the by-pass pipe 5, and described by-pass pipe 5 two ends are communicated with pneumatic plant escape pipe 1 and intercooler air outlet pipe 3 respectively.

Temperature sensor 7 measures when gas temperature drops to a certain degree among the inlet manifold, automatically controlled ECU6 is by control solenoid valve 4 apertures, make the solenoid valve aperture become large, make the front high-temperature gas of more charge air cooler directly enter the inlet manifold by by-pass pipe 5, promote gas temperature among the inlet manifold; Temperature sensor 7 measures when gas temperature rises to a certain degree among the inlet manifold, automatically controlled ECU6 is by control solenoid valve 4 apertures, make the solenoid valve aperture diminish, enter again the inlet manifold after making the front high-temperature gas of more charge air coolers by the charge air cooler cooling, reduce gas temperature among the inlet manifold, thereby cold rear temperature in the assurance optimum, the Optimizing Combustion process improves diesel engine performance and emission level.

Temperature sensor 7 measures when gas temperature is more than or equal to 40 ℃ among the inlet manifold, automatically controlled ECU6 control solenoid valve 4 attonitys, closed electromagnetic valve; When gas temperature was 30 ℃-40 ℃ among the inlet manifold, automatically controlled ECU6 control solenoid valve 4 apertures were half of maximum opening; When gas temperature was less than or equal to 30 ℃ among the inlet manifold, automatically controlled ECU6 control solenoid valve 4 apertures were maximum opening, the solenoid valve standard-sized sheet.

Claims

1. intake air temperature regulating device, comprise pneumatic plant escape pipe (1), charge air cooler (2), intercooler air outlet pipe (3), it is characterized in that: the ECU (6) that also comprises the aperture of solenoid valve (4) and by-pass pipe (5) and control solenoid valve (4), described solenoid valve (4) is installed in the by-pass pipe (5), and described by-pass pipe (5) two ends are communicated with pneumatic plant escape pipe (1) and intercooler air outlet pipe (3) respectively.

2. intake air temperature regulating device according to claim 1 is characterized in that: also comprise the temperature sensor (7) of measuring inlet manifold's Inside Air Temperature.

3. intake air temperature regulating device according to claim 2, it is characterized in that: temperature sensor (7) measures when gas temperature is more than or equal to 40 ℃ among the inlet manifold, automatically controlled ECU (6) control solenoid valve (4) attonity, closed electromagnetic valve; When gas temperature was 30 ℃-40 ℃ among the inlet manifold, automatically controlled ECU (6) control solenoid valve (4) aperture was half of maximum opening; When gas temperature was less than or equal to 30 ℃ among the inlet manifold, automatically controlled ECU (6) control solenoid valve (4) aperture was maximum opening, the solenoid valve standard-sized sheet.