Throttle idle screw adjustment system and adjustment method

Abstract

The present invention discloses a throttle idle speed screw adjustment system and method. The system comprises a parameter collector connected to an engine idle speed data source, the parameter collector being connected to a processor, and the processor being connected to a display. The adjustment method comprises system initialization; the processor establishing the idle speed screw adjustment software and hardware environment; the processor dynamically prompting idle speed screw adjustment instructions based on engine speed data; and the processor determining whether to adjust the screw again based on altitude data and engine dynamic data. The present invention eliminates the operational skill requirements for manual adjustment, ensures consistency and stability in screw adjustment results, improves work efficiency and adjustment effectiveness, and can accommodate the debugging needs of engines of different types and displacements.

Description

Technical Field

[0001] The invention relates to vehicle throttle idle screw adjustment, in particular to throttle idle screw adjustment of low-cost motor vehicles, and more particularly to a throttle idle screw adjustment system and an adjustment method thereof. Background Art

[0002] When the locomotive is idling, the throttle on the intake manifold is closed, and the intake idle valve and the idle throttle screw ensure the amount of air intake during idling. During online assembly, the idle screw adjustment requirements are: 1. The air intake should not be too large, otherwise the idle throttle effect will not be achieved; 2. The air intake should not be too small, otherwise it will easily cause the engine to stall.

[0003] Therefore, the adjustment of the traditional idle screw relies entirely on the operator's experience, and the idle screw is manually adjusted according to the engine speed. Its disadvantages are very obvious: the idle screw can only be adjusted qualitatively, lacks consistency and standardized management, and takes a long time, which is not conducive to production line control and it is difficult to ensure the adjustment quality. Summary of the Invention

[0004] In view of the shortcomings of the prior art, the purpose of the present invention is to provide a throttle idle screw adjustment system and an adjustment method thereof, which provides quantifiable operating instructions based on electronic control monitoring technology, eliminates the operational capability requirements of manual adjustment, and can ensure the consistency and stability of the screw adjustment effect while improving work efficiency and adjustment effect.

[0005] In order to achieve the above object, the present invention adopts the following technical solution: a throttle idle screw adjustment system, including a parameter collector connected to an engine idle data source, the parameter collector is connected to a processor, the processor is connected to a display, the key is,

[0006] The parameter collector is used to collect throttle opening data, engine speed data, engine cylinder temperature data, altitude data, engine ignition angle data and idle air valve opening data;

[0007] The processor establishes an idle screw adjustment software and hardware environment according to the throttle opening data, the engine speed data, and the engine cylinder temperature data;

[0008] The processor is used to calculate an idle screw adjustment instruction based on the engine speed data;

[0009] The processor is further configured to: determine whether the idle screw should be returned to circulate and adjust the idle screw according to the altitude data, the dynamic engine ignition angle data, and the dynamic idle air supply valve opening data;

[0010] The display is used for human-computer interaction and dynamically prompts the angle and direction of the idle screw adjustment.

[0011] Vehicle data is quantitatively acquired through the processor and parameter collector, and then quantitatively analyzed to directly map and display the screw adjustment direction and angle size. Manual adjustment based on experience is no longer required, ensuring the consistency and stability of the screw adjustment effect and improving work efficiency and adjustment effect.

[0012] Furthermore, the processor parameter collector may directly collect throttle opening data, engine speed data, engine cylinder temperature data, altitude data, engine ignition angle data and idle air supply valve opening data from the vehicle-mounted ECU;

[0013] Alternatively, the processor parameter collector collects throttle opening data, engine speed data, engine cylinder temperature data, altitude data, engine ignition angle data and idle air supply valve opening data from the vehicle bus;.

[0014] Furthermore, the processor is connected to a memory, which is either built into the processor or external to the processor;

[0015] The memory stores a relationship table between the engine speed data calculation result and the idle screw adjustment instruction.

[0016] Through long-term tracking and data collection, combined with the quantitative deduction of various complex parameter indicators, and with the help of relationship tables, the correlation between engine speed data and the adjustment of the throttle idle screw is directly displayed, which reduces the ability requirements for employees and improves the debugging speed.

[0017] A method for adjusting a throttle idle screw adjustment system comprises the following steps:

[0018] Step 1: System initialization steps;

[0019] Step 2: The processor establishes the hardware and software environment for adjusting the idle screw;

[0020] Step 3: The processor dynamically prompts the idle speed screw adjustment instruction according to the engine speed data;

[0021] Step 4: The processor determines whether to return to step 3 based on the altitude data and the engine dynamic data;

[0022] If there is no need to return to step 3, then end.

[0023] Combined with the system, based on the idle screw adjustment software and hardware environment, the minimum idle speed value can be set according to the basic idle speed requirements of engines with different displacements. This method meets the idle screw adjustment requirements of engines with different displacements and has a wide range of adaptability advantages.

[0024] Furthermore, the step 1 includes:

[0025] The processor is initialized, the parameter collector collects throttle opening data, dynamic engine speed data and engine cylinder temperature data, and the processor confirms that the throttle is closed; if the throttle is not in the closed state, the debugger can be prompted through the display.

[0026] The second step includes:

[0027] Step 2.1, the processor determines whether the engine speed is greater than the minimum idle speed requirement;

[0028] If the engine speed is lower than the lowest idle speed, the engine may stall automatically. Then the display will show the instruction of "increase the idle speed screw opening" and return to step 1;

[0029] If the engine speed is higher than or equal to the minimum idle speed, go to step 2.2;

[0030] Step 2.2: The processor determines whether the engine cylinder temperature is greater than the basic operating temperature value;

[0031] If the engine cylinder temperature is lower than or equal to the basic operating temperature value, the display will display the instruction of "cylinder temperature is too low" and return to step 1 with a delay;

[0032] If the engine cylinder temperature is higher than the basic operating temperature value, go to step three.

[0033] The basic operating temperature value is set according to the cylinder temperature requirements of different engines to ensure the universality of the system.

[0034] Furthermore, the step three includes:

[0035] Step 3.1: The parameter collector collects current engine speed data N times, and the processor retrieves a target idle speed value; the memory stores the target idle speed value.

[0036] Step 3.2, loop N times to collect engine speed and extract target idle speed value;

[0037] Step 3.3: Compare the engine speed value with the target idle speed value N times to count whether the speed limit times cnt exceeds the speed threshold times M, M <N;

[0038] If the speed limit times cnt exceeds the speed threshold times M, go to step 3.4;

[0039] Step 3.4: Based on the overrun result and the difference calculation data, the idle speed screw adjustment angle and direction instructions are prompted on the display, and the process returns to step 3.1.

[0040] If the number of speed limit violations cnt in step 3.3 does not exceed the speed threshold number M, proceed to step 4.

[0041] Taking the comparison of the rotational speed threshold number M as the only detection criterion simplifies the detection difficulty of the entire system, reduces the workload of the processor, and shortens the adjustment time.

[0042] Furthermore, in step 3.3: preset the initial values of the high-speed statistical value big_cnt, the low-speed statistical value small_cnt, and the moderate statistical value equal_cnt to 0;

[0043] Collect the current engine rotational speed value cur N times in a loop and compare it with the target idle speed value tgt:

[0044] If cur > tgt + 100, then the high-speed statistical value big_cnt = big_cnt + 1;

[0045] If cur < tgt, then the low-speed statistical value small_cnt = small_cnt + 1;

[0046] If tgt ≤ cur ≤ tgt + 100, then the moderate statistical value equal_cnt = equal_cnt + 1;

[0047] After N times of collection;

[0048] If big_cnt > M, or small_cnt > M, then enter step 3.4;

[0049] Otherwise, enter step four.

[0050] Furthermore, in step 3.4:

[0051] Calculate the absolute value of the difference delta, where delta is the absolute value of the difference between cur and tgt;

[0052] In the case of small_cnt > M, among the N times of collected data:

[0053] When the number of times that Delta ≥ 200 is greater than A times, then significantly increase the opening degree of the idle speed screw;

[0054] When the number of times that 200 > Delta > 100 is greater than A times, then moderately increase the opening degree of the idle speed screw;

[0055] When the number of times that 100 ≥ Delta > 50 is greater than A times, then slightly increase the opening degree of the idle speed screw;

[0056] In the case of big_cnt > M, among the N times of collected data:

[0057] When the number of times that Delta ≥ 200 is greater than A times, then significantly decrease the opening degree of the idle speed screw;

[0058] When the number of times 200>Delta>100 is greater than A times, the idle screw opening is reduced moderately;

[0059] When the number of times 100≧Delta>50 is greater than A times, the idle screw opening is slightly reduced.

[0060] In the entire steps 3.3 and 3.4, a simple addition and subtraction comparison algorithm is used to greatly reduce the amount of processor calculations, thereby improving work efficiency and reducing the processor's acquisition cost.

[0061] Furthermore, the step 4 includes:

[0062] Step 4.1, delay and wait for the vehicle system to adjust the engine ignition angle data and idle air valve opening data;

[0063] Step 4.2: The parameter collector collects altitude data, current ignition angle data, and idle air valve opening data;

[0064] Step 4.2: Determine whether the current location is in a high altitude area or a low altitude area based on the altitude data;

[0065] In high altitude areas, it is determined whether the idle air supply valve opening data is less than the set opening;

[0066] If the idle air supply valve opening data is greater than or equal to the set opening, return to step 3;

[0067] If the idle air supply valve opening data is less than the set opening, the display will show "Debugging completed";

[0068] In low altitude areas, it is determined whether the idle air valve opening data is less than the set opening, and the ignition angle data is equal to the vehicle-mounted ignition angle setting value;

[0069] If the second condition is not met, return to step three;

[0070] If the second condition is met, "Debugging completed" will be displayed on the display.

[0071] On the basis of obtaining key data, the idle screw adjustment effect is improved overall by integrating altitude data, current ignition angle data and idle air valve opening data. At the same time, this method is also forward-looking and has the expansion function of other influencing factors. When other data has a certain influence on the idle screw adjustment, the algorithm splicing of relevant parameters can be performed after step 3 or step 4 to meet the debugging needs of engines of different types and displacements.

[0072] Significant effect: The present invention provides a throttle idle screw adjustment system and an adjustment method thereof, which eliminates the operational capability requirements for manual adjustment, ensures the consistency and stability of the screw adjustment effect, improves work efficiency and adjustment effect, and at the same time, can support the debugging needs of engines of different types and different displacements. BRIEF DESCRIPTION OF THE DRAWINGS

[0073] Figure 1 This is the structural diagram of the throttle idle screw adjustment system;

[0074] Figure 2 Flowchart of the adjustment method. DETAILED DESCRIPTION

[0075] The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0076] like Figure 1 As shown, a throttle idle screw adjustment system includes a parameter collector connected to an engine idle data source, the parameter collector is connected to a processor, and the processor is connected to a display, and the parameter collector is used to collect throttle opening data, engine speed data, engine cylinder temperature data, altitude data, engine ignition angle data, and idle air supply valve opening data;

[0077] The processor parameter collector can collect this data directly from the vehicle ECU or from the vehicle bus.

[0078] The processor establishes the idle screw adjustment software and hardware environment based on the throttle opening data, engine speed data, and engine cylinder temperature data;

[0079] The processor also calculates the idle screw adjustment instruction based on the engine speed data;

[0080] The processor also determines whether to return the idle screw to cycle and adjust the idle screw based on the altitude data, the dynamic engine ignition angle data, and the dynamic idle air valve opening data;

[0081] The display is used for human-computer interaction, dynamically prompting the angle and direction of the idle screw adjustment.

[0082] The processor is also connected to a memory, which has a built-in memory that stores a relationship table between the engine speed data calculation results and the idle screw adjustment instructions, as well as the minimum idle speed value, basic operating temperature value, target idle speed value, number of cycle collection times N, speed threshold number M and other related comparison parameters.

[0083] like Figure 2 As shown, the adjustment method of the throttle idle speed screw adjustment system includes the following steps:

[0084] Step 1: System initialization steps;

[0085] The processor is initialized, the parameter collector collects throttle opening data, dynamic engine speed data and engine cylinder temperature data, and the processor confirms that the throttle is closed;

[0086] Step 2: The processor establishes the hardware and software environment for adjusting the idle screw;

[0087] Step 2.1, the processor determines whether the engine speed is greater than the minimum idle speed requirement;

[0088] If the engine speed is lower than the minimum idle speed, the display will show the instruction of "increase the idle screw opening" and return to step 1;

[0089] Different engines can set different minimum idle speed values, such as 1200r / min, 1400r / min, 2000r / min, etc.

[0090] If the engine speed is higher than or equal to the minimum idle speed, go to step 2.2;

[0091] Step 2.2: The processor determines whether the engine cylinder temperature is greater than the basic operating temperature value;

[0092] If the engine cylinder temperature is lower than or equal to the basic operating temperature value, the display will display the instruction of "cylinder temperature is too low" and return to step 1 with a delay;

[0093] Different engines can set different basic operating temperature values, such as 80 degrees, 90 degrees, 100 degrees, etc.

[0094] If the engine cylinder temperature is higher than the basic operating temperature value, go to step three.

[0095] Step 3: The processor dynamically prompts the idle speed screw adjustment instruction according to the engine speed data;

[0096] Step 3.1: The parameter collector collects the current engine speed data N times, and the processor retrieves the target idle speed value;

[0097] Step 3.2, loop N times to collect engine speed and extract target idle speed value;

[0098] Different engines can set different idle speed values, such as 1250r / min, 1500r / min, 2100r / min, etc.

[0099] Step 3.3: Compare the engine speed value with the target idle speed value N times to count whether the speed limit times cnt exceeds the speed threshold times M, M <N;

[0100] M and N are set manually. N can be 15, 20, 30, 50, etc., and M can be 5, 8, 20, 30, etc.

[0101] If the number of times cnt of overspeed exceeds the number of times M of the speed threshold, go to step 3.4;

[0102] Specifically, preset the initial values of the high-speed statistical value big_cnt, the low-speed statistical value small_cnt, and the moderate statistical value equal_cnt to 0;

[0103] Collect the current engine speed value cur N times in a loop and compare it with the target idle speed value tgt:

[0104] If cur > tgt + 100, then the high-speed statistical value big_cnt = big_cnt + 1;

[0105] If cur < tgt, then the low-speed statistical value small_cnt = small_cnt + 1;

[0106] If tgt ≤ cur ≤ tgt + 100, then the moderate statistical value equal_cnt = equal_cnt + 1;

[0107] After N times of collection;

[0108] If big_cnt > M, or small_cnt > M, go to step 3.4;

[0109] Otherwise, go to step four.

[0110] Step 3.4: According to the overspeed result and combined with the differential演算 data, prompt the instruction of the angle and direction of the idle screw adjustment through the display, and return to the said step 3.1; [[ID=3**]]

[0111] Specifically: Calculate the absolute value of the difference delta, where delta is the absolute value of the difference between cur and tgt;

[0112] In the case of small_cnt > M, in the N times of collected data:

[0113] When the number of times Delta ≥ 200 is greater than A times, greatly increase the opening of the idle screw;

[0114] When the number of times 200 > Delta > 100 is greater than A times, moderately increase the opening of the idle screw;

[0115] When the number of times 100 ≥ Delta > 50 is greater than A times, slightly increase the opening of the idle screw;

[0116] In the case of big_cnt > M, in the N times of collected data:

[0117] When the number of times Delta ≥ 200 is greater than A times, greatly reduce the opening of the idle screw; It should be noted that there may be an error in the "differential演算 data" in the original text. It might be "differential calculation data". This translation is based on the original text as provided.

[0118] When the number of times 200>Delta>100 is greater than A times, the idle screw opening is reduced moderately;

[0119] When the number of times 100≧Delta>50 is greater than A times, the idle screw opening is slightly reduced.

[0120] If the number of speed limit violations cnt in step 3.3 does not exceed the speed threshold number M, proceed to step 4.

[0121] Step 4: The processor determines whether to return to step 3 based on the altitude data and the engine dynamic data;

[0122] Specific location: Step 4.1, delay and wait for the vehicle system to adjust the engine ignition angle data and idle air valve opening data;

[0123] Step 4.2: The parameter collector collects altitude data, current ignition angle data, and idle air valve opening data;

[0124] Step 4.2: Determine whether the current location is in a high altitude area or a low altitude area based on the altitude data;

[0125] In high altitude areas, it is determined whether the idle air supply valve opening data is less than the set opening;

[0126] If the idle air supply valve opening data is greater than or equal to the set opening, return to step 3;

[0127] If the idle air supply valve opening data is less than the set opening, the display will show "Debugging completed";

[0128] In low altitude areas, it is determined whether the idle air valve opening data is less than the set opening, and the ignition angle data is equal to the vehicle-mounted ignition angle setting value;

[0129] If the second condition is not met, return to step three;

[0130] If the second condition is met, "Debugging completed" will be displayed on the display.

[0131] Finally, it should be noted that the above examples are only specific implementation examples of the present invention. Of course, those skilled in the art can make changes and modifications to the present invention. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the scope of protection of the present invention.

Claims

1. A throttle idle screw adjustment system, comprising a parameter collector connected to an engine idle data source, the parameter collector being connected to a processor, the processor being connected to a display, characterized in that: The parameter collector is used to collect throttle opening data, engine speed data, engine cylinder temperature data, altitude data, engine ignition angle data and idle air valve opening data; The processor establishes an idle screw adjustment software and hardware environment according to the throttle opening data, the engine speed data, and the engine cylinder temperature data; The processor is used to calculate an idle screw adjustment instruction based on the engine speed data; The processor is further configured to: determine whether the idle screw should be returned to circulate and adjust the idle screw according to the altitude data, the dynamic engine ignition angle data, and the dynamic idle air supply valve opening data; The display is used for human-computer interaction and dynamically prompts the angle and direction of the idle screw adjustment; The processor is connected to a memory, which stores a relationship table between the engine speed data calculation results and the idle screw adjustment instructions. The memory also stores the minimum idle speed value, the basic operating temperature value, the target idle speed value, the number of cycle collection times N, and the speed threshold number M.

2. The throttle idle screw adjustment system according to claim 1, characterized in that: Alternatively, the processor parameter collector directly collects throttle opening data, engine speed data, engine cylinder temperature data, altitude data, engine ignition angle data, and idle air valve opening data from the vehicle-mounted ECU; Alternatively, the processor parameter collector collects throttle opening data, engine speed data, engine cylinder temperature data, altitude data, engine ignition angle data and idle air supply valve opening data from the vehicle bus;.

3. The throttle idle screw adjustment system according to claim 1, characterized in that: The memory is either built into the processor or external to the processor.

4. A method for adjusting the throttle idle screw adjustment system according to claim 1, characterized in that: The following steps are involved: Step 1: System initialization steps; Step 2: The processor establishes the hardware and software environment for adjusting the idle screw; Step 3: The processor dynamically prompts the idle speed screw adjustment instruction according to the engine speed data; Step 4: The processor determines whether to return to step 3 based on the altitude data and the engine dynamic data; If there is no need to return to step 3, then end.

5. The adjustment method according to claim 4, characterized in that: The step one comprises: The processor is initialized, the parameter collector collects throttle opening data, dynamic engine speed data and engine cylinder temperature data, and the processor confirms that the throttle is closed; The second step includes: Step 2.1, the processor determines whether the engine speed is greater than the minimum idle speed requirement; If the engine speed is lower than the minimum idle speed, the display will show the instruction of "increase the idle screw opening" and return to step 1; If the engine speed is higher than or equal to the minimum idle speed, go to step 2.2; Step 2.2: The processor determines whether the engine cylinder temperature is greater than the basic operating temperature value; If the engine cylinder temperature is lower than or equal to the basic operating temperature, the "cylinder temperature is too low" instruction will be displayed on the display, and the system will return to step 1 after a delay; If the engine cylinder temperature is higher than the basic operating temperature value, go to step three.

6. The adjustment method according to claim 4, characterized in that: The step three includes: Step 3.1: The parameter collector collects the current engine speed data N times, and the processor retrieves the target idle speed value; Step 3.2: Collect the engine speed N times in a loop and extract the target idle speed value; Step 3.3: By comparing the N engine speed values with the target idle speed value, count whether the number of times cnt of speed exceeding the limit exceeds the number of times M of the speed threshold, where M < N; If the number of times cnt of speed exceeding the limit exceeds the number of times M of the speed threshold, go to Step 3.4; Step 3.4: According to the result of exceeding the limit and combined with the differential calculation data, prompt the instruction of the angle and direction of idle screw adjustment through the display, and return to Step 3.1; If the number of times cnt of speed exceeding the limit in Step 3.3 does not exceed the number of times M of the speed threshold, go to Step Four.

7. The adjustment method according to claim 6, characterized in that: In Step 3.3: The initial values of the preset high-speed statistical value big_cnt, low-speed statistical value small_cnt, and moderate statistical value equal_cnt are 0; Collect the current engine speed value cur N times in a loop and compare it with the target idle speed value tgt: If cur > tgt + 100, then the high-speed statistical value big_cnt = big_cnt + 1; If cur < tgt, then the low-speed statistical value small_cnt = small_cnt + 1; If tgt ≦ cur ≦ tgt + 100, then the moderate statistical value equal_cnt = equal_cnt + 1; After N times of collection; If big_cnt > M, or small_cnt > M, go to Step 3.4; Otherwise, go to Step Four.

8. The adjustment method according to claim 7, characterized in that: In Step 3.4: Calculate the absolute value of the difference delta, where delta is the absolute value of the difference between cur and tgt; In the case of small_cnt > M, among the N collected data: When the number of times Delta ≧ 200 is greater than A times, greatly increase the opening of the idle screw; When the number of times 200 > Delta > 100 is greater than A times, moderately increase the opening of the idle screw; When the number of times 100 ≧ Delta > 50 is greater than A times, slightly increase the opening of the idle screw; In the case of big_cnt > M, among the N collected data: When the number of times Delta ≧ 200 is greater than A times, greatly decrease the opening of the idle screw; When the number of times 200 > Delta > 100 is greater than A times, moderately decrease the opening of the idle screw; When the number of times 100 ≧ Delta > 50 is greater than A times, slightly decrease the opening of the idle screw.

9. The adjustment method according to claim 4, characterized in that: Step Four includes: Step 4.1: Delay and wait for the vehicle system to adjust the engine ignition angle data and idle air compensator opening data; Step 4.2: The parameter collector collects the altitude data, current ignition angle data, and idle air compensator opening data; Step 4.2: Judge whether the current position is in a high altitude area or a low altitude area according to the altitude data; If it is in a high altitude area, judge whether the idle air compensator opening data is less than the set opening; If the idle air compensator opening data is greater than or equal to the set opening, return to Step Three; If the idle air compensator opening data is less than the set opening, display "Debugging End" through the display; If it is in a low altitude area, judge whether the idle air compensator opening data is less than the set opening and the ignition angle data is equal to the vehicle ignition angle set value; If the second condition is not met, return to step three; If the second condition is met, "Debugging completed" will be displayed on the display.

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