Vehicle engine cylinder dead point detection device
By inserting a probe into the engine cylinder and utilizing a positioning component and a distance sensor, the extreme position of the piston can be accurately detected, solving the problem of large measurement errors in existing technologies and improving the accuracy of the engine's fuel injection angle and power output.
Patent Information
- Application Number
- CN202520240178.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-02-16
- Publication Date
- 2026-01-16
- Estimated Expiration
- 2035-02-16
AI Technical Summary
In existing technologies, the measurement of engine cylinder dead point using iron wire, welding discs, and steel rulers results in large errors, leading to inaccurate adjustment of the engine's advance fuel injection angle and insufficient engine power.
A vehicle engine cylinder dead point detection device was designed. The device uses a probe inserted into the spark plug hole or injector hole and fixed by a positioning component. Combined with the elastic force of a distance sensor and a spring, it can accurately detect the crankshaft angle scale when the piston reaches TDC or BDC.
It achieves precise positioning of the engine cylinder dead point, improves the accuracy of adjusting the advance fuel injection angle, reduces errors, and increases engine power and repair efficiency.
Smart Images
Figure CN223807751U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the engine cylinder detection technical field, specifically to a vehicle engine cylinder dead point detection device. BACKGROUND
[0002] In the running process of the engine, accurately detecting the cylinder dead point (i.e. the piston moving to the stroke limit position) is crucial for controlling the working state of the engine, optimizing fuel efficiency and reducing mechanical wear. The engine dead point refers to the two limit positions reached by the piston when moving in the cylinder, which are the top dead center (TDC) and the bottom dead center (BDC). The top dead center refers to the position of the piston when it moves to the top of the cylinder, which is farthest from the crankshaft. The bottom dead center refers to the position of the piston when it moves to the bottom of the cylinder, which is closest to the crankshaft. The top dead center is used for ignition or fuel injection to ensure combustion efficiency, and the bottom dead center is used for intake and exhaust to ensure sufficient gas exchange. Currently, mechanical detection usually relies on the change of a certain physical marker or contact point when the piston moves to the top dead center and the bottom dead center.
[0003] For example, the current debugging of the dead point on the engine of the 63-2 armored transport vehicle mainly uses a straight iron wire, a welding sheet and a steel ruler. The measured value is the top dead center of the engine. The error of the measured top dead center value is large, which causes inaccurate adjustment of the advance fuel injection angle of the engine, resulting in insufficient engine power. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at overcoming the prior art, in which the debugging of the dead point on the engine mainly uses a straight iron wire, a welding sheet and a steel ruler. The measured value is the top dead center of the engine. The error of the measured top dead center value is large, which causes inaccurate adjustment of the advance fuel injection angle of the engine, resulting in insufficient engine power. The utility model provides a vehicle engine cylinder dead point detection device. The probe is inserted into the engine cylinder through the spark plug hole or the fuel injector hole, and the positioning assembly is located in the spark plug hole or the fuel injector hole. The vehicle engine cylinder dead point detection device is positioned and fixed by the positioning assembly, so that the engine cylinder dead point detection can be performed. In the initial state, the probe is lowered to abut against the cylinder piston under the elastic force of the spring. When the piston rises to the highest point or falls to the lowest point, the maximum distance can be obtained by the distance measuring sensor at this time, which is displayed on the display screen, indicating that the piston reaches the TDC or the BDC. The crankshaft rotation angle scale at this time is recorded, realizing accurate positioning.
[0005] To achieve the above-mentioned purpose, the utility model adopts the technical scheme that:
[0006] The utility model discloses a vehicle engine cylinder dead point detection device, including the sleeve and the probe of activity setting in the sleeve, the bottom end of probe penetrates the bottom end of sleeve and extends to the outside, the probe can move up and down in the sleeve and carries out position adjustment, the top of sleeve is provided with the base of screw joint, be installed with controller on the base, the outside of sleeve is provided with positioning assembly, positioning assembly is used for the positioning fixed of sleeve, the inside roof of base is installed with range sensor, the top of probe is connected with the spring between the inside roof of base, wherein, when using the vehicle engine cylinder dead point detection device, the probe is inserted into the engine cylinder through spark plug hole or oil atomizer hole, and the positioning assembly is located in the spark plug hole or oil atomizer hole, and the vehicle engine cylinder dead point detection device is positioned and fixed through the positioning assembly, and the engine cylinder dead point detection can be carried out, when detecting, under the elastic force of spring, the probe is abutted on the cylinder piston under the initial state, and the crankshaft is rotated, when the piston rises to the highest point or drops to the lowest point, the maximum distance can be obtained through the range sensor at this moment, and is displayed on the display screen, indicating that the piston reaches TDC or BDC, and the crankshaft angle scale at this time is recorded, and accurate positioning is realized.
[0007] As preferred, the positioning assembly comprises a fixing tube fixed on the outside of the sleeve, a strip-shaped inclined groove is formed in the lower part of the outer wall of the fixing tube, a wedge-shaped block is slidably arranged in the strip-shaped inclined groove, a limiting nut is threadedly connected to the upper part of the fixing tube, a ring-shaped seat is rotatably connected to the lower part of the limiting nut, the ring-shaped seat is sleeved on the outside of the fixing tube, the wedge-shaped block is connected and fixed with the ring-shaped seat through a connecting rod, and the connecting rod is a deformable elastic plastic part. Specifically, the fixing mode of the sleeve by the positioning assembly is as follows: when in use, the probe is inserted into the engine cylinder through the spark plug hole or the oil atomizer hole, and the positioning assembly is located in the spark plug hole or the oil atomizer hole, the limiting nut is rotated to drive the ring-shaped seat to move downward, the ring-shaped seat moves downward to push the wedge-shaped block to move downward in the strip-shaped inclined groove through the connecting rod, so that the wedge-shaped block is pressed against the inner wall of the spark plug hole or the oil atomizer hole, thereby fixing the sleeve. When disassembling, the limiting nut is rotated upward to drive the ring-shaped seat to move upward, so that the sleeve is fixed and disassembled conveniently and quickly, and the engine cylinder dead point detection efficiency is further improved.
[0008] As preferred, a rectangular groove is vertically formed in the upper part of the outer wall of the fixing tube, and the rectangular groove and the strip-shaped inclined groove are on the same vertical line, the bottom end of the rectangular groove and the top end of the strip-shaped inclined groove are in communication with each other, and the connecting rod is located in the rectangular groove.
[0009] As preferred, the upper surface of the annular seat is provided with an annular sliding groove, the lower surface of the limiting nut is welded with a sliding block, the sliding block is in sliding connection with the annular sliding groove, and the sliding block is provided with three sliding blocks in an annular distribution.
[0010] As preferred, the front surface of the controller is provided with a display screen, the output end of the distance measuring sensor is electrically connected with the input of the controller, and the data information collected by the distance measuring sensor is displayed through the display screen on the controller.
[0011] As preferred, the controller is provided with a storage battery, the output end of the storage battery is electrically connected with the distance measuring sensor and the display screen, and the back surface of the controller is provided with a charging hole.
[0012] Compared with the prior art, the utility model has the advantages of the following beneficial effects:
[0013] The vehicle engine cylinder dead point detection device inserts the probe into the engine cylinder through the spark plug hole or the oil injector hole, and makes the positioning assembly located in the spark plug hole or the oil injector hole, and the engine cylinder dead point detection device is positioned and fixed through the positioning assembly, so that the engine cylinder dead point detection can be carried out.
[0014] Further, in use, the probe is inserted into the engine cylinder through the spark plug hole or the oil injector hole, and the positioning assembly is located in the spark plug hole or the oil injector hole, the annular seat is lowered by rotating the limiting nut, the annular seat is lowered through the connecting rod to push the wedge block to move downward in the strip-shaped inclined groove, the wedge block is pressed against the inner wall of the spark plug hole or the oil injector hole, the sleeve is fixed, and when disassembling, the annular seat is moved upward by rotating the limiting nut, so that the sleeve is fixed and disassembled conveniently and quickly, and the engine cylinder dead point detection efficiency is further improved. BRIEF DESCRIPTION OF DRAWINGS
[0015] Figure 1 It is a whole structure schematic view of the utility model;
[0016] Figure 2 It is a sectional view of the utility model;
[0017] Figure 3 It is a structure schematic view of the positioning assembly in the utility model;
[0018] Figure 4 It is a sectional schematic view of the positioning assembly in the utility model;
[0019] Figure 5 It is a split structure schematic view of the limiting nut and the annular seat in the utility model.
[0020] Reference signs: 1, sleeve; 2, probe; 3, base; 31, distance measuring sensor; 32, spring; 4, controller; 41, display screen; 42, charging hole; 5, positioning assembly; 51, fixed tube; 52, strip-shaped inclined groove; 53, wedge-shaped block; 54, connecting rod; 55, annular seat; 551, annular sliding groove; 56, limiting nut; 561, sliding block; 57, rectangular groove. DETAILED DESCRIPTION
[0021] The specific implementation of the utility model of a vehicle engine cylinder dead point detection device is further described below in combination with the accompanying Figure 1 - the accompanying Figure 5 , further illustrates the specific implementation of the utility model of a vehicle engine cylinder dead point detection device, overcomes the prior art, for the dead point of the engine, mainly uses a straight iron wire, welding piece and steel ruler, the measured value is the top dead center of the engine, the error of the measured top dead center value is large, and the advance oil supply angle adjustment of the engine is not accurate, which causes the engine power to be insufficient, a vehicle engine cylinder dead point detection device is provided, the probe is inserted into the engine cylinder through the spark plug hole or the oil injector hole, and the positioning assembly is located in the spark plug hole or the oil injector hole, the vehicle engine cylinder dead point detection device is positioned and fixed through the positioning assembly, and the engine cylinder dead point detection can be performed, in the initial state, under the action of the elastic force of the spring, the probe moves downward and abuts against the cylinder piston, the crankshaft is rotated, when the piston rises to the highest point or falls to the lowest point, the maximum distance can be obtained through the distance measuring sensor at this time, and the maximum distance is displayed on the display screen, indicating that the piston reaches TDC or BDC, and the crankshaft rotation angle scale at this time is recorded, so that accurate positioning is realized.
[0022] The application discloses a vehicle engine cylinder dead point detection device, which comprises a sleeve 1 and a probe 2 movably arranged in the sleeve 1, the bottom end of the probe 2 extends to the outside through the bottom end of the sleeve 1, the probe 2 can move up and down in the sleeve 1 for position adjustment, a base 3 is screw-connected to the top end of the sleeve 1, a controller 4 is installed on the base 3, a positioning assembly 5 is arranged on the outside of the sleeve 1 and used for positioning and fixing the sleeve 1, a distance measuring sensor 31 is installed on the inner top plate of the base 3, a spring 32 is connected between the top end of the probe 2 and the inner top plate of the base 3, a display screen 41 is arranged on the front surface of the controller 4, the output end of the distance measuring sensor 31 is electrically connected with the input of the controller 4, and the data information collected by the distance measuring sensor 31 is displayed on the display screen 41 of the controller 4. A storage battery is arranged in the controller 4, the output end of the storage battery is electrically connected with the distance measuring sensor 31 and the display screen 41, and a charging hole 42 is arranged on the back surface of the controller 4.
[0023] Specifically, when the vehicle engine cylinder dead point detection device is used, the probe 2 is inserted into the engine cylinder through the spark plug hole or the oil injector hole, and the positioning assembly 5 is located in the spark plug hole or the oil injector hole, so that the vehicle engine cylinder dead point detection device is positioned and fixed through the positioning assembly 5, and then the engine cylinder dead point detection can be carried out. In the detection, in the initial state, under the elastic force of the spring 32, the probe 2 moves downward and abuts against the cylinder piston, and the crankshaft is rotated, when the piston rises to the highest point or falls to the lowest point, the maximum distance can be obtained through the distance measuring sensor 31 at this time, and the maximum distance is displayed on the display screen 41, which indicates that the piston reaches the TDC or the BDC, the crankshaft rotation angle scale at this time is recorded, accurate positioning is realized, and thus the problems, such as the large error of the measured top dead center value, the inaccurate adjustment of the advance fuel supply angle of the engine and the insufficient power of the engine, are overcome. The data of the top dead center in the repair process is quickly read, the repair speed is improved, the error is effectively reduced, the time gap between the traditional repair mode and the modern combat rapid repair requirement is shortened, the vacancy of the special corrector is made up, and the accuracy and precision of the adjustment of the advance fuel supply angle are improved.
[0024] The positioning assembly 5 comprises a fixed pipe 51 which is sleeved and fixed on the outside of the sleeve 1, a strip-shaped inclined groove 52 is formed in the lower part of the outer wall of the fixed pipe 51, a wedge-shaped block 53 is slidably arranged in the strip-shaped inclined groove 52, a limiting nut 56 is screw-connected to the upper part of the fixed pipe 51, a ring-shaped seat 55 is rotatably connected to the lower part of the limiting nut 56, the ring-shaped seat 55 is sleeved on the outside of the fixed pipe 51, the wedge-shaped block 53 is connected and fixed with the ring-shaped seat 55 through a connecting rod 54, and the connecting rod 54 is a deformable elastic plastic part.
[0025] Specific, through the positioning assembly 5 for the sleeve 1 fixed way is, in use, through the spark plug hole or injector hole into the engine cylinder probe 2, and make the positioning assembly 5 in the spark plug hole or injector hole, rotate the limit nut 56 driven ring seat 55 down, ring seat 55 down by connecting rod 54 wedge block 53 in the strip chute 52 down, so that the wedge block 53 extruded in the spark plug hole or injector hole wall, realize the fixed sleeve 1, when disassembling, turn up limit nut 56 driven ring seat 55 up, can make the sleeve 1 of fixed and disassembled are very convenient and fast, further improve the engine cylinder dead point detection efficiency.
[0026] The outer wall of the fixed tube 51 is vertically provided with a rectangular groove 57, and the rectangular groove 57 is on the same vertical line with the strip chute 52. The bottom end of the rectangular groove 57 is communicated with the top end of the strip chute 52, and the connecting rod 54 is located in the rectangular groove 57.
[0027] Specifically, the cross section of the strip chute 52 is a right trapezoidal structure. When the wedge block 53 moves downward in the strip chute 52, the outer wall of the wedge block 53 protrudes from the strip chute 52 and abuts against the inner wall of the spark plug hole or the injector hole, thereby achieving positioning and fixing.
[0028] The upper surface of the ring seat 55 is provided with a ring-shaped sliding groove 551, and the lower surface of the limit nut 56 is welded with a sliding block 561. The sliding block 561 is in sliding connection with the ring-shaped sliding groove 551. There are three sliding blocks 561, which are arranged in a ring shape.
[0029] Specifically, the limit nut 56 is in sliding connection with the ring-shaped sliding groove 551 on the ring seat 55 through the sliding block 561, so that when the limit nut 56 moves up and down on the fixed tube 51, the ring seat 55 will not rotate, but will only move up and down. The ring seat 55 moves up and down to drive the wedge block 53 to adjust the position.
[0030] The basic principles and main features of the present application and the advantages of the present application are shown and described above. Those skilled in the art should understand that the present application is not limited by the above examples. The above examples and descriptions in the specification are only to illustrate the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application. These changes and improvements all fall within the scope of the claimed present application. The scope of protection of the present application is defined by the appended claims and their equivalents.
Claims
1. A vehicle engine cylinder dead center detection apparatus characterized by comprising: The utility model provides a kind of probe and sleeve, including sleeve (1) and probe (2) movably arranged in sleeve (1), the bottom end of probe (2) extends to outside through the bottom end of sleeve (1), probe (2) can be moved up and down in sleeve (1) to adjust position, the top end of sleeve (1) is screw-connected with base (3), controller (4) is installed on base (3), the outside of sleeve (1) is provided with positioning assembly (5), and positioning assembly (5) is used for the positioning of sleeve (1) Fixed, distance measuring sensor (31) is installed on the inner top plate of base (3), spring (32) is connected between the top end of probe (2) and the inner top plate of base (3).
2. A device for detecting the dead center of a cylinder of a vehicle engine according to claim 1, characterized in that, The positioning assembly (5) includes a fixed tube (51) fixed on the outside of the sleeve (1), a strip-shaped inclined groove (52) is formed in the lower part of the outer wall of the fixed tube (51), a wedge-shaped block (53) is slidably arranged in the strip-shaped inclined groove (52), a limiting nut (56) is threadedly connected to the upper part of the fixed tube (51), a ring-shaped seat (55) is rotatably connected to the lower part of the limiting nut (56), the ring-shaped seat (55) is sleeved on the outside of the fixed tube (51), the wedge-shaped block (53) is connected and fixed with the ring-shaped seat (55) through a connecting rod (54), and the connecting rod (54) is a deformable elastic plastic part.
3. A device for detecting the dead center of a cylinder of a vehicle engine according to claim 2, characterized in that, A rectangular groove (57) is vertically formed in the upper part of the outer wall of the fixed tube (51), and the rectangular groove (57) is on the same vertical line as the strip-shaped inclined groove (52), the bottom end of the rectangular groove (57) is in communication with the top end of the strip-shaped inclined groove (52), and the connecting rod (54) is located in the rectangular groove (57).
4. A device for detecting the dead center of a cylinder of a vehicle engine according to claim 3, characterized in that, An annular sliding groove (551) is formed in the upper surface of the ring-shaped seat (55), a sliding block (561) is welded to the lower surface of the limiting nut (56), the sliding block (561) is slidably connected with the annular sliding groove (551), and three sliding blocks (561) are arranged in a ring shape.
5. The apparatus of claim 1, wherein A display screen (41) is arranged on the front surface of the controller (4), the output end of the distance measuring sensor (31) is electrically connected with the input end of the controller (4), and the data information collected by the distance measuring sensor (31) is displayed on the display screen (41) of the controller (4).
6. A device for detecting the dead center of a cylinder of a vehicle engine according to claim 5, characterized in that, A storage battery is arranged in the controller (4), the output end of the storage battery is electrically connected with the distance measuring sensor (31) and the display screen (41), and a charging hole (42) is arranged on the back surface of the controller (4).