Control method for forced idling function of engine

Abstract

The invention discloses a control method for a forced idling function of an engine, relates to the technical field of engine control, and solves the technical problem that an existing method for controlling the idling operation time of the engine is not beneficial to effective operation of the engine. The method comprises the following steps: setting the standard time of the forced idle state of the engine, obtaining the running state of the engine and the running time of the idle state of the engine, and obtaining the total idle running time of the engine according to the running time of the forced idle state of the engine, the running state of the engine and the running time of the idle state of the engine. And controlling the engine according to the total idle running time of the engine. It is guaranteed that the engine has enough idling running time to lubricate internal moving parts, it is guaranteed that preheating is sufficient during idling of the engine, and therefore effective running of the engine is facilitated.

Description

Technical Field

[0001] The present invention relates to the technical field of engine control, and more particularly to a control method for a forced idle function of an engine. Background Art

[0002] The speed increase of existing generator sets is controlled by sending messages through the instrument, and the idle delay can be set on the instrument to prevent users from mistakenly changing the idle delay of the instrument to be too short, which will lead to insufficient idle preheating of the engine and is not conducive to the lubrication of the engine.

[0003] The existing technical proposal is to realize the forced idle function through ECU internal calibration. After the software internal calibration enables this function, the engine will delay to the set time after successful start before speeding up. The actual usage scenario is: some manufacturers will cancel the engine idle running time set on the instrument, so that the engine can directly speed up to the target speed during the starting phase. For example, when the common power generation frequency is 50HZ or 60HZ, the engine speed will directly start to reach 1500r or 1800r. At this time, the internal moving parts of the engine have not been fully lubricated by the oil, especially in cold weather, which is more detrimental to the effective operation of the engine. At this time, after enabling this function, it can run at idle speed to the set time. This control method is actually a protective measure for the engine. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a control method for the forced idle function of an engine in view of the deficiencies in the prior art, so as to solve the technical problem that the existing method for controlling the idle running time of the engine is not conducive to the effective operation of the engine.

[0005] The present invention discloses a method for controlling a forced idle function of an engine. The method comprises the following steps: setting a standard time of a forced idle state of the engine, obtaining an operating state of the engine and an operating time of the engine idle state, obtaining a total engine idle operation time through the operating time of the forced idle state of the engine, the operating state of the engine and the operating time of the engine idle state, and controlling the engine according to the total engine idle operation time.

[0006] As a further improvement, the method for obtaining the total engine idling time through the forced idling state running time of the engine, the running state of the engine and the running time of the engine idling state is:

[0007] When the running state of the engine is the forced idle state, the running time of the engine idle state is compared with the standard time of the engine forced idle state. When the running time of the engine idle state is greater than or equal to the standard time of the engine forced idle state, the running time of the engine idle state is taken as the total engine idle running time; when the running time of the engine idle state is less than the standard time of the engine forced idle state, the standard time of the engine forced idle state is taken as the total engine idle running time;

[0008] When the running state of the engine is a non-forced idle state, the total engine idle running time is the running time of the engine in the idle state.

[0009] Furthermore, the state priority is set, and the running state of the engine in the forced idle state is set as a high state priority, and the running state of the engine in the idle state is set as a low state priority.

[0010] Furthermore, the running time of the engine in the idle state is calibrated by an instrument.

[0011] Furthermore, when the engine is normally started and enters an idle state, the engine runs at idle speed according to the total idle running time of the engine.

[0012] Beneficial Effects

[0013] The advantages of the present invention are:

[0014] The present invention sets a standard time of a forced idle state of an engine, obtains the running state of the engine and the running time of the engine idle state, obtains the total idle running time of the engine through the running time of the forced idle state of the engine, the running state of the engine and the running time of the engine idle state, controls the engine according to the total idle running time of the engine, does not require rewiring and has no corresponding switch, realizes the engine entering forced idle, ensures that the engine has enough idle running time to lubricate internal moving parts, ensures that the engine idle is fully preheated, and is beneficial to the effective operation of the engine. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a flow chart of the engine forced idle function method of the present invention. DETAILED DESCRIPTION

[0016] The present invention will be further described below in conjunction with the embodiments, but it does not constitute any limitation to the present invention. Any limited number of modifications made by anyone within the scope of the claims of the present invention are still within the scope of the claims of the present invention.

[0017] See also Figure 1The present invention provides a control method for a forced idle function of an engine. The method comprises the following steps: setting a standard time N of a forced idle state of the engine, obtaining an operating state of the engine and an operating time M of the engine idle state, obtaining a total idle operation time of the engine through the operating time N of the forced idle state of the engine, the operating state of the engine and the operating time M of the engine idle state, and controlling the engine according to the total idle operation time of the engine.

[0018] The method of obtaining the total engine idling time by the engine's forced idling state running time N, the engine's running state and the engine's idling state running time M is as follows:

[0019] When the running state of the engine is the forced idle state, the running time M of the engine idle state is compared with the standard time N of the engine forced idle state. When the running time M of the engine idle state is greater than or equal to the standard time N of the engine forced idle state, the running time M of the engine idle state is taken as the total idle running time of the engine; when the running time M of the engine idle state is less than the standard time N of the engine forced idle state, the standard time N of the engine forced idle state is taken as the total idle running time of the engine;

[0020] When the running state of the engine is the non-forced idle state, the total idling running time of the engine is the running time M of the engine idling state.

[0021] After the engine is started and enters idle speed, the engine speed will not receive the speed message control output by the instrument within a certain set time, so that the engine is forced to run for the set time in the idle state, so that the engine can be fully lubricated and preheated, reducing the wear of internal moving parts. After that, the engine enters the target speed to work, which can fully guarantee the effective service life of the engine and is also a strong guarantee for the safety of personnel lives.

[0022] Set the state priority, and set the running state of the engine in the forced idle state as the high state priority, and the running state of the engine in the idle state as the low state priority. Ensure that the running state of the engine can enter the forced idle state, thereby ensuring the effective operation of the engine.

[0023] The running time M of the engine at idle speed is calibrated by the instrument.

[0024] When the engine starts normally and enters the idle state, the engine runs at idle speed according to the total idle time of the engine. After the total idle time of the engine ends, the engine runs to the target speed for operation.

[0025] This function does not require rewiring. It adds a layer of protection to the speed increase control sent by the instrument. It ensures that the engine has enough idling time to lubricate internal moving parts. It is a protection strategy for the engine, which can effectively increase engine reliability, ensure continuous power output of the engine, and improve product market competitiveness.

[0026] This function only delays the speed control message of the instrument after successful starting. The internal communication between other sensors of the instrument and the ECU is not affected. For example, the engine water temperature sensor, oil temperature sensor, oil pressure sensor, etc. all communicate normally with the ECU and are displayed in the car.

[0027] The above is only a preferred embodiment of the present invention. It should be pointed out that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present invention, which will not affect the effect of the implementation of the present invention and the practicality of the patent.

Claims

1. A control method for an engine forced idle function, characterized in that: The method comprises the following steps: setting a standard time of a forced idle state of an engine, obtaining an operating state of the engine and an operating time of the engine idle state, obtaining a total engine idle operating time through the operating time of the forced idle state of the engine, the operating state of the engine and the operating time of the engine idle state, and controlling the engine according to the total engine idle operating time.

2. The control method of the engine forced idle function according to claim 1, characterized in that: The method of obtaining the total engine idling operation time through the forced idling state operation time of the engine, the engine operation state and the engine idling state operation time is: When the running state of the engine is the forced idle state, the running time of the engine idle state is compared with the standard time of the engine forced idle state. When the running time of the engine idle state is greater than or equal to the standard time of the engine forced idle state, the running time of the engine idle state is taken as the total engine idle running time; when the running time of the engine idle state is less than the standard time of the engine forced idle state, the standard time of the engine forced idle state is taken as the total engine idle running time; When the running state of the engine is a non-forced idle state, the total engine idle running time is the running time of the engine in the idle state.

3. The control method of the engine forced idle function according to claim 2, characterized in that: The state priority is set, and the running state of the engine in the forced idle state is regarded as a high state priority, and the running state of the engine in the idle state is regarded as a low state priority.

4. The control method of the engine forced idle function according to claim 1, characterized in that: The running time of the engine in the idle state is calibrated by an instrument.

5. The control method of the engine forced idle function according to claim 1, characterized in that: When the engine is normally started and enters an idle state, the engine runs at idle speed according to the total idle running time of the engine.

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