CN109798179B - Supercharged air deflation device and method - Google Patents
Supercharged air deflation device and method Download PDFInfo
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- CN109798179B CN109798179B CN201910056980.XA CN201910056980A CN109798179B CN 109798179 B CN109798179 B CN 109798179B CN 201910056980 A CN201910056980 A CN 201910056980A CN 109798179 B CN109798179 B CN 109798179B
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02T—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO TRANSPORTATION
- Y02T10/00—Road transport of goods or passengers
- Y02T10/10—Internal combustion engine [ICE] based vehicles
- Y02T10/12—Improving ICE efficiencies
Abstract
The invention discloses a pressurized air bleeder and a bleeder method, wherein the pressurized air bleeder comprises an air outlet pipe and a butterfly valve, one end of the air outlet pipe is arranged on a shell of an intercooler and is communicated with the inside of the intercooler, and the other end of the air outlet pipe is connected with the inlet end of the butterfly valve; the butterfly valve is controlled by an electronic control unit ECU of the engine. According to the air bleeding method corresponding to the air bleeding device, the electric control unit ECU acquires that the monitored air intake temperature is lower than the preset temperature; and the collected monitored supercharged air pressure is greater than the preset pressure; at the moment, the butterfly valve needs to be controlled to be opened to start air release; or if the electric control unit ECU acquires that the monitored inlet air temperature is lower than the preset temperature; the monitored supercharged air pressure is not collected, but the collected monitored operation load is larger than the preset load; at the moment, the butterfly valve still needs to be controlled to be opened to start air bleeding. The supercharged air bleeding device and the bleeding method can fundamentally solve the problem of high detonation pressure of the engine in the operation of the arctic region.
Description
Technical Field
The invention belongs to the technical field of engine supercharging systems, and particularly relates to a supercharged air bleeding device and a bleeding method.
Background
The engine supercharging system is to supply air to the cylinder after pre-compressing by means of a supercharger (including a turbine and a compressor) to increase the air density and the air intake. The increase of the air input of the engine can increase the circulating oil supply and improve the fuel economy; the power of the engine can be increased to obtain good acceleration, but if the temperature is increased after air pressurization and the density is reduced and the temperature is too high, the air inflow is reduced, the pressurization effect is weakened, and the engine detonation can be caused. Therefore, the common superchargers are matched with the intercooler, and the high-temperature pressurized air enters the combustion chamber after being intercooled by the intercooler; the addition of the intercooler is very beneficial to improving power, reducing oil consumption, reducing heat load and lightening detonation.
When the existing marine engine (a common diesel engine) runs in an arctic region, because the environmental temperature is low, the air inlet temperature of a supercharging air inlet end (the air inlet end of an air compressor) of a supercharger is low, a large amount of supercharging cold air enters a combustion chamber, so that the engine bears high combustion pressure, a cylinder sleeve, a cylinder cover and the like in the engine bear high mechanical load, a connecting rod and a piston are subjected to combustion impact, the connecting rod and the cylinder cover bolt can be broken seriously, the economical efficiency and the dynamic property of the engine are seriously deteriorated, and the life safety of a person is threatened. The current measures for solving the problems are as follows:
1. the safety protection to the cylinder cover bolts is increased, every two cylinder cover bolts are connected through a protection plate, and the cylinder cover bolts are prevented from flying out to hurt people under the high detonation pressure condition.
2. An air preheating device is added to ensure that the air inlet temperature of the supercharging air inlet end of the supercharger is higher than 5 ℃, so that the possibility of high detonation pressure is avoided.
However, the two measures fundamentally cannot solve the problem of high detonation pressure of an engine (diesel engine) in the operation of an arctic region; and the air preheating device additionally arranged is high in price and high in operation cost.
Disclosure of Invention
The invention solves the technical problem of providing a pressurized air bleeder and a pressurized air bleeder method, which can fundamentally solve the problem of high detonation pressure of an engine in the running of an arctic region.
In order to solve the technical problems, in a first aspect, an embodiment of the present invention provides a charge air bleeder, which is mounted on an intercooler housing of an engine and used for releasing charge air in an intercooler; the supercharged air bleeder comprises an air outlet pipe and a butterfly valve, wherein one end of the air outlet pipe is arranged on the intercooler shell and communicated with the inside of the intercooler, the other end of the air outlet pipe is connected with the inlet end of the butterfly valve, and the outlet end of the butterfly valve is connected with a silencer; the butterfly valve is controlled by an electronic control unit ECU of the engine.
Preferably, the outlet end of the butterfly valve is connected with a silencer.
Preferably, the butterfly valve is an electric control butterfly valve, and the electric control butterfly valve is electrically connected with the electronic control unit ECU.
Preferably, the charge air bleeder comprises an electromagnetic valve arranged on the intercooler shell, the butterfly valve is a pneumatic butterfly valve, an air inlet and an air outlet of the pneumatic butterfly valve are respectively connected with the electromagnetic valve through hoses, and the electromagnetic valve is connected with a driving air source pipe; the electromagnetic valve is electrically connected with the electronic control unit ECU.
Preferably, one end of the air outlet pipe is mounted on the intercooler housing by means of a flange, and the other end of the air outlet pipe is connected with the inlet end of the butterfly valve by means of another flange.
In a second aspect, an embodiment of the present invention provides a method for bleeding pressurized air, where an air inlet of the intercooler is connected to a pressurized air outlet of the supercharger; the charge air bleed method includes the steps of:
s1, monitoring the air inlet temperature of a supercharging air inlet end of the supercharger, the supercharging air pressure of the supercharging air outlet end and the operation load of the engine in real time;
s2, if the intake air temperature collected by the electronic control unit ECU is less than a preset temperature; the electronic control unit ECU acquires that the monitored supercharged air pressure is greater than a preset pressure; at the moment, the butterfly valve needs to be opened;
or if the electric control unit ECU acquires that the monitored air inlet temperature is lower than a preset temperature; the ECU does not acquire the monitored supercharged air pressure, but acquires that the monitored running load is greater than a preset load; at this point, the butterfly valve still needs to be opened.
Preferably, the step S2 specifically includes the following steps:
s21, judging whether the ECU acquires the monitored air inlet temperature, if so, executing a step S22; if not, sending an error signal and closing the butterfly valve;
s22, judging whether the air inlet temperature is lower than the preset temperature, if so, executing a step S23; if not, closing the butterfly valve;
s23, continuously judging whether the electric control unit ECU acquires the monitored supercharged air pressure, if so, executing a step S24; if not, sending an error signal and executing the step S25;
s24, judging whether the pressure of the pressurized air is larger than the preset pressure, and if so, opening the butterfly valve; if not, closing the butterfly valve;
s25, continuously judging whether the running load monitored by the electronic control unit ECU is collected, if yes, executing a step S26; if not, sending an error signal and closing the butterfly valve;
s26, judging whether the operation load force is larger than the preset load or not, and if so, opening the butterfly valve; if not, the butterfly valve is closed.
Preferably, a temperature sensor is arranged at the supercharging air inlet end, and the electronic control unit ECU acquires the air inlet temperature monitored by the temperature sensor in real time; the pressure-boosting air outlet end is provided with a pressure sensor, and the electronic control unit ECU acquires the pressure of the boosted air monitored by the pressure sensor in real time.
Preferably, the preset temperature is 4-6 ℃; the preset pressure is 2.3 bar; the preset load is 75% of the rated load.
After the technical scheme is adopted, the invention has the beneficial effects that:
the invention relates to a pressurized air bleeder which is arranged on an intercooler shell of an engine and used for releasing pressurized air in an intercooler; the core component of the charge air bleeder for realizing the release of the charge air is a butterfly valve which is controlled by an electronic control unit ECU of the engine. The air discharging method using the pressurized air discharging device is that the electric control unit ECU acquires that the monitored air inlet temperature is lower than the preset temperature; and the collected monitored supercharged air pressure is greater than the preset pressure; at the moment, the butterfly valve needs to be controlled to be opened, and the air is released; or if the electric control unit ECU acquires that the monitored inlet air temperature is lower than the preset temperature; the monitored supercharged air pressure is not collected, but the collected monitored operation load is larger than the preset load; at the moment, the butterfly valve still needs to be controlled to be opened to start air bleeding.
The invention is particularly suitable for engines (marine diesel engines) sailing in the arctic region; the opening of a butterfly valve in the pressurized air bleeder is controlled by an electronic control unit ECU, and when the opening condition is met, a part of cold air can be discharged to the engine room, so that the amount of pressurized cold air entering the combustion chamber is reduced. The problem that the detonation pressure of the engine is high in the operation of the arctic region can be fundamentally solved, the damage to mechanical parts caused by long-term overhigh pressure is effectively avoided, and the device is simple in structure and low in cost.
Drawings
FIG. 1 is a schematic view of the construction of the charge air bleed apparatus of the present invention;
FIG. 2 is a schematic view of another aspect of the charge air bleed apparatus of the present invention;
FIG. 3 is a functional block diagram of a charge air bleed method of the present invention;
FIG. 4 is a block flow diagram of a charge air bleed method of the present invention;
in the figure: 1-intercooler shell, 2-air outlet pipe, 3-pneumatic butterfly valve, 4-silencer, 5-flange, 6-electromagnetic valve, 7-hose, 8-driving air source pipe.
Detailed Description
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below.
A charge air bleeder is mounted on an intercooler housing of an engine for releasing charge air in the intercooler to prevent a large amount of charge cold air from entering a combustion chamber.
As shown in fig. 1 and 2, the charge air bleeder includes an outlet duct 2 and a butterfly valve, one end of the outlet duct 2 is mounted to an intercooler housing 1 (only a portion of the intercooler housing is shown in the drawings) via a flange 5 and communicates with the inside of the intercooler, and the other end of the outlet duct 2 is connected to an inlet end of the butterfly valve via another flange 5; the outlet end of the butterfly valve is connected with a silencer 4. The butterfly valve is controlled by an electronic control unit ECU of the engine.
The silencer 4 is a noise reduction device for an airflow pipeline with noise transmission, such as a pipeline and an elbow with sound absorption linings or a pipeline with suddenly changed sectional area and other discontinuous acoustic impedances, and can be used for attenuating or reflecting the noise in the pipeline. The silencer 4 in this embodiment mainly utilizes porous sound absorbing material to reduce noise. When sound waves enter the silencer 4, a part of sound energy is rubbed in the pores of the porous material and converted into heat energy to be dissipated, so that the sound waves passing through the silencer 4 are weakened.
The butterfly valve can be an electric control butterfly valve which is electrically connected with the electric control unit ECU, namely, the electric control butterfly valve is directly controlled by the electric control unit ECU. Or, as shown in this embodiment, the butterfly valve is a pneumatic butterfly valve 3, and an electromagnetic valve 6 (pneumatic electromagnetic valve) for controlling the movement of a butterfly plate of the pneumatic butterfly valve 3 is installed on the intercooler housing 1 corresponding to the butterfly valve, an air inlet and an air outlet of the pneumatic butterfly valve 3 are respectively connected with corresponding ports of the electromagnetic valve 6 through hoses 7, and the electromagnetic valve 6 is connected with a driving air source pipe 8; the electromagnetic valve 6 is electrically connected with the electronic control unit ECU, and the pneumatic butterfly valve 3 is controlled by the electronic control unit ECU through the electromagnetic valve 6, namely the pneumatic butterfly valve 3 is indirectly controlled by the electronic control unit ECU.
As shown in fig. 3, with the air bleeding method of the above-described charge air bleeding device, the air inlet of the intercooler is connected to the charge air outlet of the supercharger; the charge air bleeding method includes the steps of:
and S1, monitoring the inlet air temperature of the supercharging inlet end of the supercharger, the supercharging air pressure of the supercharging outlet end of the supercharger and the running load of the engine in real time.
S2, if the electric control unit ECU acquires that the monitored air inlet temperature is lower than the preset temperature; the electric control unit ECU acquires that the monitored supercharged air pressure is greater than a preset pressure; at this time, the butterfly valve needs to be opened for air release.
Or if the electric control unit ECU acquires that the monitored inlet air temperature is lower than the preset temperature; the ECU does not acquire the monitored supercharged air pressure, but acquires that the monitored running load is greater than the preset load; at this time, the butterfly valve still needs to be opened for air bleeding.
The temperature sensor is arranged at the supercharging air inlet end, and the electronic control unit ECU acquires the air inlet temperature monitored by the temperature sensor in real time; the supercharging air outlet end is provided with a pressure sensor, and an Electronic Control Unit (ECU) acquires the supercharging air pressure monitored by the pressure sensor in real time. In addition, the ECU obtains the operating load of the engine based on the collected signals transmitted by various sensors, such as a rotation speed sensor, a torque sensor, etc., and the monitoring and calculation of the operating load are well known to those skilled in the art and will not be described herein.
Wherein the preset temperature is 4-6 ℃; the preset pressure is 2.3 bar; the preset load is 75% of the rated load. These specific values are only exemplary and not only applicable, and preset values (the preset temperature range is usually not required to be adjusted, and the preset pressure and the preset load are usually adjusted according to the requirement) can be appropriately adjusted according to the requirement, and the preset values need to be stored in the electronic control unit ECU of the engine in advance, so as to be convenient for direct recall in executing logic control.
As shown in fig. 4, step S2 in this embodiment specifically includes the following steps:
s21, judging whether the ECU acquires the monitored air inlet temperature (whether an air inlet temperature signal is available), if so, executing a step S22; if not, an error signal is sent, the butterfly valve is closed, and the operation process is ended.
S22, judging whether the air inlet temperature is lower than 4-6 ℃, if so, executing a step S23; if not, the butterfly valve is closed, and the operation flow is terminated.
S23, continuously judging whether the electric control unit ECU acquires the monitored supercharged air pressure (whether the supercharged air pressure signal is available), if so, executing a step S24; if not, an error signal is sent and step S25 is executed.
S24, judging whether the pressure of the pressurized air is greater than 2.3bar, if so, opening a butterfly valve; if not, the butterfly valve is closed, and the operation flow is terminated.
S25, continuously judging whether the ECU acquires the monitored operation load (whether the operation load is available), if so, executing a step S26; if not, an error signal is sent, the butterfly valve is closed, and the operation process is ended.
S26, judging whether the operation load force is larger than 75% of rated load, if so, opening a butterfly valve; if not, the butterfly valve is closed, and the operation flow is terminated.
The control input signals of the supercharged air bleeder are an intake air temperature signal and a supercharged air pressure signal, and if the supercharged air pressure signal is lacked, the operation load signal is used as a reference value; if the intake air temperature signal, the charge air pressure signal and the operating load signal are simultaneously absent, the butterfly valve remains closed.
The supercharged air exhaust device and the supercharged air exhaust method can fundamentally solve the problem of high detonation pressure of the engine in the operation of the arctic region, effectively avoid the damage of long-term overhigh pressure to mechanical parts, have simple structure and lower cost and improve the operation reliability of the engine.
While the invention has been described with reference to the preferred embodiments, it will be understood by those skilled in the art that various changes and modifications may be made. Any modification and improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.
Claims (9)
1. A charge air bleeder is characterized in that the charge air bleeder is arranged on an intercooler shell of an engine and used for releasing charge air in an intercooler;
the supercharged air bleeder comprises an air outlet pipe and a butterfly valve, wherein one end of the air outlet pipe is arranged on the intercooler shell and communicated with the inside of the intercooler, and the other end of the air outlet pipe is connected with the inlet end of the butterfly valve;
the butterfly valve is controlled by an electronic control unit ECU of the engine, and when the air inlet temperature of a supercharging air inlet end of the supercharger is lower than a preset temperature and the supercharging air pressure of a supercharging air outlet end of the supercharger is higher than a preset pressure; or when the intake air temperature is lower than a preset temperature, the supercharged air pressure is not collected, but the running load of the engine is higher than a preset load; and the electronic control unit ECU controls the butterfly valve to be opened.
2. A charge air bleed device as in claim 1 wherein the outlet end of said butterfly valve is connected to a silencer.
3. The charge air bleeder of claim 1, wherein said butterfly valve is an electronically controlled butterfly valve, said electronically controlled butterfly valve being electrically connected to said electronic control unit ECU.
4. The charge air bleeder of claim 1, wherein the charge air bleeder comprises a solenoid valve mounted on the intercooler housing, the butterfly valve is a pneumatic butterfly valve, an air inlet and an air outlet of the pneumatic butterfly valve are respectively connected with the solenoid valve through hoses, and the solenoid valve is connected with a driving air source pipe; the electromagnetic valve is electrically connected with the electronic control unit ECU.
5. A charge air bleed device as defined in claim 1 wherein one end of said air outlet tube is mounted to said intercooler housing by means of a flange and the other end of said air outlet tube is connected to the inlet end of said butterfly valve by means of another flange.
6. A charge air bleeding method characterized by using the charge air bleeding device according to any one of claims 1 to 5, the intake port of the intercooler being connected to the charge air outlet end of the supercharger; the charge air bleed method includes the steps of:
s1, monitoring the air inlet temperature of a supercharging air inlet end of the supercharger, the supercharging air pressure of the supercharging air outlet end and the operation load of the engine in real time;
s2, if the intake air temperature collected by the electronic control unit ECU is less than a preset temperature; the electronic control unit ECU acquires that the monitored supercharged air pressure is greater than a preset pressure; at the moment, the butterfly valve needs to be opened;
or if the electric control unit ECU acquires that the monitored air inlet temperature is lower than a preset temperature; the ECU does not acquire the monitored supercharged air pressure, but acquires that the monitored running load is greater than a preset load; at this point, the butterfly valve still needs to be opened.
7. The charge air bleeding method as defined in claim 6, wherein said step S2 specifically includes the steps of:
s21, judging whether the ECU acquires the monitored air inlet temperature, if so, executing a step S22; if not, sending an error signal and closing the butterfly valve;
s22, judging whether the air inlet temperature is lower than the preset temperature, if so, executing a step S23; if not, closing the butterfly valve;
s23, continuously judging whether the electric control unit ECU acquires the monitored supercharged air pressure, if so, executing a step S24; if not, sending an error signal and executing the step S25;
s24, judging whether the pressure of the pressurized air is larger than the preset pressure, and if so, opening the butterfly valve; if not, closing the butterfly valve;
s25, continuously judging whether the running load monitored by the electronic control unit ECU is collected, if yes, executing a step S26; if not, sending an error signal and closing the butterfly valve;
s26, judging whether the operation load force is larger than the preset load or not, and if so, opening the butterfly valve; if not, the butterfly valve is closed.
8. The charge air bleeding method according to claim 6, wherein a temperature sensor is provided at said charge air intake end, and said electronic control unit ECU collects said intake air temperature monitored in real time by said temperature sensor;
the pressure-boosting air outlet end is provided with a pressure sensor, and the electronic control unit ECU acquires the pressure of the boosted air monitored by the pressure sensor in real time.
9. A method of bleeding pressurized air as claimed in claim 7, wherein said preset temperature is comprised between 4 ℃ and 6 ℃; the preset pressure is 2.3 bar; the preset load is 75% of the rated load.
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