阅读说明：本技术 涡轮增压器执行器的无级调压方法 (Stepless pressure regulating method for turbocharger actuator ) 是由 李文军 胡辽平 戴志辉 王益堂 刘晓东 欧永健 于 2019-11-14 设计创作，主要内容包括：本发明涉及涡轮增压器技术领域,公开一种涡轮增压器执行器的无级调压方法,包括以下步骤：S1.获取执行器安装定位面至套管连接孔距离L、套管连接孔到自身端面距离L1、执行器安装定位面到推杆末端端面距离L2；S2.获执行器理论工作时的压力和行程关系Y=aX+b；S3.获取执行器总成开启压力值B；S4.用公式L3=L1+L2-L+(B-b)/a-1获预调压执行器总成长度L3值,并将其调至L3长度；S5.检测系统向执行器总成分别输入压力值B和另一压力值(B+aN),检测推杆行程并记录对应的压力行程值,反算执行器弹性系数；S6.设定增压器允许执行器推杆在1mm和(1+N)mm行程时的两个压力判定范围和弹性系数范围,将S5弹性系数与之比较,若超出范围,则以S5弹性系数为基础得一执行器推杆修正角度值。(The invention relates to the technical field of turbochargers, and discloses a stepless pressure regulating method of a turbocharger actuator, which comprises the following steps: s1, acquiring a distance L from an actuator mounting and positioning surface to a sleeve connecting hole, a distance L1 from the sleeve connecting hole to an end face of the actuator mounting and positioning surface, and a distance L2 from the actuator mounting and positioning surface to an end face of a push rod; s2, acquiring a pressure and stroke relation Y = aX + b when the actuator works theoretically; s3, acquiring a starting pressure value B of the actuator assembly; s4, obtaining a value of L3 of the total length of the pre-pressure-regulating actuator assembly by using a formula L3= L1+ L2-L + (B-B)/a-1, and regulating the value to the length of L3; s5, the detection system respectively inputs a pressure value B and another pressure value (B + aN) to the actuator assembly, detects the stroke of the push rod, records a corresponding pressure stroke value, and reversely calculates the elastic coefficient of the actuator; s6, setting two pressure judging ranges and elastic coefficient ranges of the actuator push rod allowed by the supercharger in the strokes of 1mm and (1 + N) mm, comparing the elastic coefficient with S5, and if the elastic coefficient exceeds the range, obtaining an actuator push rod correction angle value based on the S5 elastic coefficient.)

1. A stepless pressure regulating method of a turbocharger actuator is characterized in that: the method comprises the following steps:

s1, pressurizing an air cavity of the head of an actuator to enable a sleeve connecting hole of the actuator to be installed at a transmission pin shaft, and acquiring a distance L value from an installation positioning surface of the actuator to the sleeve connecting hole, a distance L1 value from the sleeve connecting hole to the end surface of the sleeve, and a distance L2 value from the installation positioning surface to the end surface of the tail end of a push rod in a free state of the actuator;

s2, acquiring a relation of real-time pressure and stroke data in the theoretical working process of the actuator, wherein Y = aX + b, and Y is the pressurizing pressure of an air cavity at the head of the actuator; x is the stroke of a push rod of the actuator; a. b is a constant;

s3, acquiring a starting pressure value B of the actuator assembly, wherein the starting pressure is a corresponding pressurizing pressure when an actuator head air cavity is pressurized and an actuator push rod moves for 1mm in the complete machine installation state of the supercharger;

s4, pre-regulating the pressure of the actuator assembly, obtaining the length L3 value of the pre-regulated pressure actuator assembly through a formula L3= L1+ L2-L + (B-B)/a-1, and pre-regulating the actuator assembly to the length L3;

s5, mounting the actuator assembly in the S4 state on a supercharger, and carrying out pressure-stroke detection on a detection system;

s6, the detection system respectively inputs a starting pressure value B and another pressure value (B + aN) to the actuator assembly, detects and records the stroke data of the push rod of the actuator, and the data records are respectively (B1, X1), (B2 and X2);

s7, setting two pressure judgment ranges and elastic coefficient ranges of the actuator push rod allowed by the booster on the detection system in the strokes of 1mm and (1 + N) mm;

s8, inversely calculating the elastic coefficient of the actuator according to the two-point pressure and stroke data acquired in the step S6;

if the inversely calculated elastic coefficient exceeds the elastic coefficient range in S7, directly judging that the actuator single body is unqualified, and restarting the steps of S5, S6, S7 and S8 by using the actuator;

if the inversely calculated elastic coefficient is within the elastic coefficient range in S7, calculating accurate pressure values at the strokes of 1mm and (1 + N) mm according to the pressure and stroke data of two points in S7, and comparing the accurate pressure values with the pressure judgment range; if the calculated accurate pressure values are all within the pressure judgment range, qualified offline is carried out; if the two calculated accurate pressure values are not in the pressure judgment range, correcting according to the inversely calculated elastic coefficient, and calculating an actuator push rod correction angle by combining the thread pitch of the actuator push rod;

s9, the detection system stretches the actuator push rod, rotates the actuator push rod by a corresponding angle according to the correction angle of S8, fastens a nut on the actuator push rod, and repeats the steps of S6, S7 and S8 until the actuator push rod is qualified.

2. The method of stepless pressure regulation of a turbocharger actuator according to claim 1, characterized by: the pressure and stroke data of the actuator in the working process are respectively measured by the pressure sensor and the displacement sensor.

Technical Field

The invention belongs to the technical field of turbochargers, and particularly relates to a stepless pressure regulating method for a turbocharger actuator.

Background

The turbocharger turbine utilizes the energy of combustion gas to drive the compressor to compress the density of the intake gas so as to improve the intake density, so that the internal combustion engine achieves higher combustion efficiency and realizes more work output.

In the working process of the internal combustion engine, the combustion working condition can be adjusted and changed from time to time according to the output requirement. The ECU of the internal combustion engine can automatically calculate and output a control command to the actuator of the turbocharger, and the actuator directly controls the opening of the air relief valve, so that the working speed of the turbocharger is controlled. The pneumatic actuator actually works through an internal compression spring, the opening pressure setting of the actuator is particularly important, and the pneumatic actuator is directly related to the whole working area of the air bleeding control of the supercharger.

The control mechanism structure of the existing pneumatic actuator is as follows: the mounting surface of the actuator is attached to the mounting surface of the supercharger and is fixed with the mounting bolt of the actuator through a nut; after the actuator is pressurized, the length of the thread for screwing the sleeve into the push rod of the actuator is adjusted, so that the sleeve is matched with the transmission pin to be sleeved under the condition that the sleeve just meets the closing state of the valve; then the nut preassembled on the push rod is rotated downwards, is attached to the end of the sleeve and is screwed tightly, so that the sleeve and the actuator are fixed into a whole; the clamping ring is embedded into the clamping groove of the transmission pin so as to prevent the sleeve from falling off.

Based on the connected mode of sleeve pipe and drive pin, the sleeve pipe installation has the limitation, and the sleeve pipe can only rotate 180 integral multiples and carry out aperture regulation to the bleed valve, has just so caused the pressure regulating value to be the consequence of interval value, can not realize that the stepless pressure regulating of executor comes accurate control opening pressure.

Disclosure of Invention

The invention aims to overcome the defects in the prior art and provides a stepless pressure regulating method for a turbocharger actuator, which can realize flexible pressure regulation of the actuator.

The technical scheme of the invention is as follows: a stepless pressure regulating method for a turbocharger actuator comprises the following steps:

s1, pressurizing an air cavity of the head of an actuator to enable a sleeve connecting hole of the actuator to be installed at a transmission pin shaft, and acquiring a distance L value from an installation positioning surface of the actuator to the sleeve connecting hole, a distance L1 value from the sleeve connecting hole to the end surface of the sleeve, and a distance L2 value from the installation positioning surface to the end surface of the tail end of a push rod in a free state of the actuator;

s2, acquiring a relation of real-time pressure and stroke data in the theoretical working process of the actuator, wherein Y = aX + b, and Y is the pressurizing pressure of an air cavity at the head of the actuator; x is the stroke of a push rod of the actuator; a. b is a constant;

s3, acquiring a starting pressure value B of the actuator assembly, wherein the starting pressure is a corresponding pressurizing pressure when an actuator head air cavity is pressurized and an actuator push rod moves for 1mm in the complete machine installation state of the supercharger;

s4, pre-regulating the pressure of the actuator assembly, obtaining the length L3 value of the pre-regulated pressure actuator assembly through a formula L3= L1+ L2-L + (B-B)/a-1, and pre-regulating the actuator assembly to the length L3;

s5, mounting the actuator assembly in the S4 state on a supercharger, and carrying out pressure-stroke detection on a detection system;

s6, the detection system respectively inputs a starting pressure value B and another pressure value (B + aN) to the actuator assembly, detects and records the stroke data of the push rod of the actuator, and the data records are respectively (B1, X1), (B2 and X2);

s7, setting two pressure judgment ranges and elastic coefficient ranges of the actuator push rod allowed by the booster on the detection system in the strokes of 1mm and (1 + N) mm;

s8, inversely calculating the elastic coefficient of the actuator according to the two-point pressure and stroke data acquired in the step S6;

if the inversely calculated elastic coefficient exceeds the elastic coefficient range in S7, directly judging that the actuator single body is unqualified, and restarting the steps of S5, S6, S7 and S8 by using the actuator;

if the inversely calculated elastic coefficient is within the elastic coefficient range in S7, calculating accurate pressure values at the strokes of 1mm and (1 + N) mm according to the pressure and stroke data of two points in S7, and comparing the accurate pressure values with the pressure judgment range; if the calculated accurate pressure values are all within the pressure judgment range, qualified offline is carried out; if the two calculated accurate pressure values are not in the pressure judgment range, correcting according to the inversely calculated elastic coefficient, and calculating an actuator push rod correction angle by combining the thread pitch of the actuator push rod;

s9, the detection system stretches the actuator push rod, rotates the actuator push rod by a corresponding angle according to the correction angle of S8, fastens a nut on the actuator push rod, and repeats the steps of S6, S7 and S8 until the actuator push rod is qualified.

The further technical scheme of the invention is as follows: the pressure and stroke data of the actuator in the working process are respectively measured by the pressure sensor and the displacement sensor.

Compared with the prior art, the invention has the following beneficial effects:

the invention discloses a stepless pressure regulating actuator, which is characterized in that an actuator assembly is regulated to the length of L3 in an initial pressure regulating mode, two pressure values are input through a detection system, corresponding stroke data are obtained, an elastic coefficient is calculated reversely, the elastic coefficient is compared with the elastic coefficient range set on the detection system, when the two pressure values are different, the elastic coefficient calculated reversely is corrected, a correction angle is obtained through correlation calculation, and a push rod rotates by a corresponding angle, so that the stepless pressure regulating actuator really realizes stepless pressure regulation.

The detailed structure of the present invention will be further described with reference to the accompanying drawings and the detailed description.

Drawings

FIG. 1 is a schematic view showing a structure in which an actuator according to embodiment 1 is mounted to a turbocharger;

FIG. 2 is an indication diagram of the length of L1 and L2 in example 1;

fig. 3 is an indication diagram of the length of L3 in example 1.

Detailed Description

Example 1

The stepless pressure regulating method for the actuator of the turbocharger is provided, the structural schematic diagram of the actuator installed on the turbocharger is shown in figure 1, and the stepless pressure regulating method specifically comprises the following steps:

s1, pressurizing an air cavity of the head of an actuator to enable a sleeve connecting hole of the actuator to be installed at a transmission pin shaft, and acquiring a distance L value from an installation positioning surface of the actuator to the sleeve connecting hole, a distance L1 value from the sleeve connecting hole to the end surface of the sleeve, and a distance L2 value from the installation positioning surface to the end surface of the tail end of a push rod in a free state of the actuator;

s2, acquiring a relation of real-time pressure and stroke data in the theoretical working process of the actuator, wherein Y = aX + b, and Y is the pressurizing pressure of an air cavity at the head of the actuator; x is the stroke of a push rod of the actuator; a. b is a constant;

s3, acquiring a starting pressure value B of the actuator assembly, wherein the starting pressure is a corresponding pressurizing pressure when an actuator head air cavity is pressurized and an actuator push rod moves for 1mm in the complete machine installation state of the supercharger;

s4, pre-regulating the pressure of the actuator assembly, obtaining the length L3 value of the pre-regulated pressure actuator assembly through a formula L3= L1+ L2-L + (B-B)/a-1, and pre-regulating the actuator assembly to the length L3;

s5, mounting the actuator assembly in the S4 state on a supercharger, and carrying out pressure-stroke detection on a detection system;

s6, the detection system respectively inputs a starting pressure value B and another pressure value (B + aN) to the actuator assembly, detects and records the stroke data of the push rod of the actuator, and the data records are respectively (B1, X1), (B2 and X2);

s7, setting two pressure judgment ranges and elastic coefficient ranges of the actuator push rod allowed by the booster on the detection system in the strokes of 1mm and (1 + N) mm;

s8, inversely calculating the elastic coefficient of the actuator according to the two-point pressure and stroke data acquired in the step S6;

if the inversely calculated elastic coefficient exceeds the elastic coefficient range in S7, directly judging that the actuator single body is unqualified, and restarting the steps of S5, S6, S7 and S8 by using the actuator;

if the inversely calculated elastic coefficient is within the elastic coefficient range in S7, calculating accurate pressure values at the strokes of 1mm and (1 + N) mm according to the pressure and stroke data of two points in S7, and comparing the accurate pressure values with the pressure judgment range; if the calculated accurate pressure values are all within the pressure judgment range, qualified offline is carried out; if the two calculated accurate pressure values are not in the pressure judgment range, correcting according to the inversely calculated elastic coefficient, and calculating an actuator push rod correction angle by combining the thread pitch of the actuator push rod;

s9, the detection system stretches the actuator push rod, rotates the actuator push rod by a corresponding angle according to the correction angle of S8, fastens a nut on the actuator push rod, and repeats the steps of S6, S7 and S8 until the actuator push rod is qualified.

The pressure and stroke data of the actuator in the working process are measured by the pressure sensor and the displacement sensor respectively.

The present invention is not limited to the above specific structure or connection manner, and it falls within the protection scope of the present invention as long as the method has the same or similar idea as the present technical solution.