Full-automatic cooling liquid closed-loop control system for turbocharger and control method

Abstract

The invention discloses a full-automatic cooling liquid closed-loop control system and method for a turbocharger, and the system comprises the turbocharger which is provided with a water cooling structure; the temperature sensor is mounted at a pressure shell of the turbocharger; the electric valve is mounted at a water inlet of a water cooling structure of the turbocharger; and the electric control unit is used for collecting and analyzing the temperature signal and controlling the opening degree of the electric valve. According to the cooling system of the turbocharger, the opening degree of the electric valve can be selectively controlled by collecting the temperature signal of the turbocharger, then the flow of the cooling liquid is adjusted, cooling can be reasonably conducted according to different working stages and different working states of the turbocharger, and the cooling efficiency of the turbocharger is improved. Therefore, the best working function of the turbocharger is exerted, and the service life is prolonged.

Description

Technical Field

[0001] The invention belongs to the technical field of turbocharger cooling systems, and in particular relates to a full-automatic coolant closed-loop control system and a control method for a turbocharger. Background Art

[0002] A turbocharger is a device used in automobile engines that increases its power output by compressing the air entering the engine. It is widely used in mid- to high-end cars. During operation, the turbocharger is in a high-temperature operating state due to the influence of high-temperature exhaust gas, so it needs to be equipped with a dedicated cooling structure.

[0003] When a turbocharger with a water cooling structure is used on an engine, its coolant supply conditions are determined only by the engine, and the coolant conditions provided by the engine may not be the most suitable for the characteristics of the turbocharger itself under all working conditions. Therefore, based on this situation, the present invention will realize the automatic and precise closed-loop control of the coolant supply conditions by the turbocharger according to its own working conditions, so as to give full play to the best working performance and the longest working life of the turbocharger. Summary of the invention

[0004] In view of the above deficiencies in the prior art, the present invention provides a fully automatic coolant closed-loop control system and control method for a turbocharger, which can provide coolant for the turbocharger on demand, can adapt the cooling of the turbocharger to its own state, and can improve the overall turbocharging efficiency.

[0005] The present invention is solved by the following technical solutions.

[0006] A fully automatic coolant closed-loop control system for a turbocharger comprises: a turbocharger provided with a water cooling structure; a temperature sensor mounted on a compression shell of the turbocharger; an electric valve mounted at a water inlet of the water cooling structure of the turbocharger; and an electronic control unit for collecting temperature signals, analyzing them, and controlling the opening of the electric valve.

[0007] The cooling system of the turbocharger in the present application can selectively control the opening of the electric valve by collecting the temperature signal of the turbocharger, thereby adjusting the flow rate of the coolant. It can reasonably perform cooling according to different working stages and different working states of the turbocharger, thereby exerting the best working function of the turbocharger and improving its service life.

[0008] In a preferred embodiment, the electronic control unit includes: a single-chip microcomputer, an A / D conversion module, a D / A conversion module, and a power supply module; the A / D conversion module is used to receive the analog signal of the temperature sensor and convert it into a digital signal recognizable by the single-chip microcomputer; the D / A conversion module is used to convert the digital signal of the electric valve opening output by the single-chip microcomputer into an analog signal; the power supply module is used to convert the voltage of the automobile engine into the power supply voltage of the single-chip microcomputer.

[0009] The control method of the fully automatic coolant closed-loop control system for a turbocharger involved in the present application comprises the following steps: S10: The single chip microcomputer is reset, and the opening of the electric valve is controlled to be 100% fully open; S20: collecting the current temperature signal Tmv of the turbocharger to calculate the target opening of the coolant inlet electric valve at this time; S30: Calculate the opening of the water inlet electric valve according to the collected temperature signal Tmv and the optimal temperature threshold Ttv for opening the water inlet electric valve obtained according to the engine calibration: When Tmv≤Ttv, the electric valve for water inlet does not open, and the output of the electronic control unit controls the opening degree to 0%; When Tmv>Ttv, the water inlet electric valve opens, and the electronic control unit calculates the water inlet electric valve opening V based on the difference between the two, V=(Tmv-Ttv)%; When Tmv-Ttv>100, the opening V of the water inlet electric valve is set to 100%.

[0010] The method can make the coolant flow rate always match the real-time working condition of the turbocharger, and stimulate the optimal working efficiency of the turbocharger.

[0011] Compared with the prior art, the present invention has the following beneficial effects: it provides a fully automatic coolant closed-loop control system and control method for a turbocharger, which can provide coolant for the turbocharger on demand, can adapt the cooling of the turbocharger to its own state, and can improve the overall turbocharging efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the module structure of the fully automatic coolant closed-loop control system for the turbocharger in the present invention.

[0013] Figure 2 It is a module schematic diagram of the electronic control unit in the fully automatic coolant closed-loop control system for the turbocharger in the present invention.

[0014] Figure 3 It is a flow chart of the control method in the present invention. DETAILED DESCRIPTION

[0015] The present invention is further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0016] In the following embodiments, the same or similar reference numerals throughout represent the same or similar components or elements with the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0017] See also Figures 1 to 3 The present invention relates to a fully automatic coolant closed-loop control system for a turbocharger, comprising: a turbocharger, which is provided with a water cooling structure; a temperature sensor, which is installed at the compressor shell of the turbocharger and is used to measure the current temperature information of the turbocharger compressor outlet and provide it to an electronic control unit; an electric valve, which is installed at the water inlet of the water cooling structure of the turbocharger and can be commanded by the electronic control unit to achieve a change in the water inlet flow rate; and an electronic control unit, which is used to collect temperature signals, analyze the two signals, obtain the opening of the electric valve and control the corresponding action of the electric valve to control the state of the coolant finally provided to the turbocharger.

[0018] In the control system, the electronic control unit includes: a single-chip microcomputer, an A / D conversion module, a D / A conversion module, and a power supply module; the single-chip microcomputer is the core of the entire circuit, and is used to collect temperature signals, calculate the opening of the electric valve, and control the operation of the electric valve; the A / D conversion module is used to receive the analog signal of the temperature sensor and convert it into a digital signal recognizable by the single-chip microcomputer; the D / A conversion module is used to convert the electric valve opening digital signal output by the single-chip microcomputer into an analog signal, such as a current value of 4-20mA, to control the operation of the electric valve; the power supply module is used to convert the voltage of the automobile engine into the power supply voltage of the single-chip microcomputer, for example, converting the conventional 12V or 24V voltage signal of the automobile engine into a 5V voltage signal, so as to provide it to the single-chip microcomputer as the power supply voltage so that it can work normally.

[0019] Specifically, the electronic control unit collects the temperature parameters of the turbocharger, analyzes and calculates based on the signal, obtains the opening of the electric valve and controls the corresponding action of the electric valve to control the coolant state ultimately provided to the turbocharger, so that the turbocharger is always in the most reasonable coolant state in all operating conditions.

[0020] The control method of the fully automatic coolant closed-loop control system for a turbocharger involved in the present application comprises the following steps: S10: Initialization: When the system is powered on for the first time, the microcontroller is reset and the electric valve opening is controlled to the maximum 100% opening. S20: Signal acquisition: Collect the current temperature signal Tmv of the supercharger to calculate the target opening of the coolant inlet electric valve at this time.

[0021] S30: Calculation of the opening of the water inlet electric valve: Calculation of the opening of the water inlet electric valve based on the collected temperature signal Tmv of the current supercharger and the optimal temperature threshold Ttv for opening the water inlet electric valve obtained based on the engine calibration; When Tmv≤Ttv, the water inlet electric valve will not open, and the electronic control unit outputs a control opening of 0%; When Tmv>Ttv, the water inlet electric valve opens, and the electronic control unit calculates the water inlet electric valve opening V based on the difference between the two, V=(Tmv-Ttv)%; When Tmv-Ttv>100, the opening V of the water inlet electric valve is set to 100%.

[0022] S40: End: The system is powered off.

[0023] The method can make the coolant flow rate always match the real-time working condition of the turbocharger, and stimulate the optimal working efficiency of the turbocharger.

[0024] Currently, when a turbocharger is installed on an engine and is running, the state of its coolant system (pressure, flow) is determined by the operating conditions of the engine itself (speed, load and other factors), and the turbocharger itself only passively accepts the coolant state provided by the engine. The coolant conditions provided by the engine may not be the most suitable for the characteristics of the turbocharger itself under all operating conditions.

[0025] Therefore, in comparison, the advantages of the system and method of the present invention are: providing coolant for the turbocharger on demand, such as when the engine is just started, the present invention will cut off the coolant entering the turbocharger, which is conducive to the rapid heating of the coolant entering the turbocharger, thereby reducing the viscosity of the coolant and improving the working efficiency of the turbocharger shaft system; cutting off the coolant entering the turbocharger when the engine is cold-started can ensure that the high-temperature gas that has just been compressed by the turbocharger compressor will not be cooled again, which is conducive to cold starting.

[0026] It can be seen from the above description that the cooling system of the turbocharger in the present application can selectively control the opening of the electric valve by collecting the temperature signal of the turbocharger, thereby adjusting the flow rate of the coolant, and can reasonably perform cooling according to different working stages and different working states of the turbocharger, thereby exerting the best working function of the turbocharger and improving its service life.

[0027] The protection scope of the present invention includes but is not limited to the above embodiments. The protection scope of the present invention shall be based on the claims. Any replacement, deformation, and improvement of the technology that can be easily thought of by technicians in this field shall fall within the protection scope of the present invention.

Claims

1. A fully automatic coolant closed-loop control system for a turbocharger, characterized in that: include: A turbocharger, wherein the turbocharger is provided with a water cooling structure; A temperature sensor, which is installed on the compressor housing of the turbocharger; An electric valve, which is installed at the water inlet of the water cooling structure of the turbocharger; The electronic control unit is used to collect temperature signals, analyze them, and control the opening of the electric valve.

2. A fully automatic coolant closed-loop control system for a turbocharger according to claim 1, characterized in that: The electronic control unit includes: a single chip microcomputer, an A / D conversion module, a D / A conversion module, and a power supply module; The A / D conversion module is used to receive the analog signal of the temperature sensor and convert it into a digital signal recognizable by the single chip microcomputer; The D / A conversion module is used to convert the electric valve opening digital signal output by the single chip microcomputer into an analog signal; The power supply module is used to convert the voltage of the automobile engine into the power supply voltage of the single chip microcomputer.

3. The control method of the fully automatic coolant closed-loop control system for a turbocharger according to claim 1 or 2, characterized in that: The following steps are involved: S10: The single chip microcomputer is reset, and the opening of the electric valve is controlled to be 100% fully open; S20: collecting the current temperature signal Tmv of the turbocharger to calculate the target opening of the coolant inlet electric valve at this time; S30: Calculate the opening of the water inlet electric valve according to the collected temperature signal Tmv and the optimal temperature threshold Ttv for opening the water inlet electric valve obtained according to the engine calibration: When Tmv≤Ttv, the electric valve for water inlet does not open, and the output of the electronic control unit controls the opening degree to 0%; When Tmv>Ttv, the water inlet electric valve opens, and the electronic control unit calculates the water inlet electric valve opening V based on the difference between the two, V=(Tmv-Ttv)%; When Tmv-Ttv>100, the opening V of the water inlet electric valve is set to 100%.

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