An engine control method based on a lock car function

Abstract

This invention discloses an engine control method based on a vehicle locking function, belonging to the field of engine control technology. It solves the technical problem that existing instrument-based starter control cannot meet the requirements for safe engine starting. The method includes: adding a relay to the engine starter signal control line, with the relay's control terminal connected to the engine's ECU; when the ECU executes a vehicle locking signal, its internal parameters limit the fuel injection quantity to 0, the ECU controls the relay to disconnect, and the starter cannot tow the engine; when the ECU does not execute a vehicle locking signal, the ECU's fuel injection quantity is normal, the ECU controls the relay to connect, and the starter can tow the engine. For engines requiring pre-fuel injection, this invention can protect the engine by locking it before the technical condition is confirmed, preventing the starter from towing and protecting the engine from dry friction of the bearings caused by not pre-fuel injection; the control is reliable, the logic is simple, and it is easy to operate.

Description

Technical Field

[0001] This invention relates to the field of engine control technology, and more specifically, to an engine control method based on a vehicle locking function. Background Technology

[0002] Currently, some large-bore engines are started by pre-lubricating or pre-injecting oil for a certain period of time before executing the start and towing commands. The start control is handled by the generator set's instrumentation, which is internally set with a pre-lubrication time. After the pre-lubrication time is completed, the instrumentation executes the start and towing command to complete the engine start-up.

[0003] The disadvantages of existing technology are: 1. The pre-lubrication or pre-pressure function set by the instrument can be turned off or the pre-lubrication time can be reduced. 2. After the instrument starts, the engine controller has no protection or monitoring capabilities. 3. Currently, high-power engine control does not have a vehicle locking function and cannot perform engine locking protection before the technical status is confirmed. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to address the above-mentioned shortcomings of the prior art. The purpose of the present invention is to provide an engine control method based on the vehicle locking function.

[0005] The technical solution of this invention is: an engine control method based on a vehicle locking function, comprising:

[0006] A relay is added to the engine starter signal control line, and the control terminal of the relay is connected to the engine ECU;

[0007] When the ECU executes the vehicle lock signal, the internal parameters of the ECU limit the fuel injection quantity to 0, the ECU controls the relay to disconnect, and the starter motor cannot turn the engine to start;

[0008] When the ECU does not execute the vehicle lock signal, the fuel injection volume of the ECU is normal, the ECU controls the relay to turn on, and the starter motor can turn the engine to start.

[0009] As a further improvement, the ECU distinguishes the status of the unit control instrument commands and confirms the technical status based on the status of the unit control instrument commands. If the technical status is that the pre-lubrication function has not been completed or the pre-lubrication time is less than the safe lubrication time, the ECU executes the vehicle lock signal and prompts the reason for locking the vehicle; otherwise, the ECU does not execute the vehicle lock signal.

[0010] Furthermore, it also includes: in the rental market, when the lessee of the engine fails to pay the rental fee, the operator of the engine sends a locking command to the engine's ECU via a remote client, and the engine's ECU executes the locking signal after receiving the locking command.

[0011] Furthermore, after the ECU receives the start signal, the ECU obtains the setting parameters of the unit control instrument. If the pre-lubrication function of the unit control instrument is turned off or the pre-oil supply time of the unit control instrument is reduced to less than the safe lubrication time, the ECU executes the vehicle lock signal and prompts the reason for locking the vehicle; otherwise, the ECU does not execute the vehicle lock signal.

[0012] Furthermore, while indicating the reason for locking the vehicle, the system provides an option to pre-supply fuel according to the default strategy. After the user selects the option to pre-supply fuel according to the default strategy, the ECU sends the default fuel supply time to the generator control instrument, so that the generator control instrument pre-supply fuel according to the default fuel supply time. After the pre-supply is completed, the ECU does not execute the vehicle lock signal.

[0013] Furthermore, the default oil supply MAP is pre-calibrated based on the oil temperature;

[0014] After the ECU receives the start signal, the ECU obtains the actual oil temperature and queries the default oil supply MAP table based on the actual oil temperature to obtain the default oil supply time.

[0015] Beneficial effects

[0016] Compared with the prior art, the advantages of this invention are as follows:

[0017] 1. For engines that require pre-fueling, the present invention can protect the engine by locking the vehicle before the technical condition is confirmed.

[0018] 2. In the locked mode, the starter motor cannot be towed, which can protect the engine from dry friction of core moving parts such as bearings caused by the engine not being pre-lubricated.

[0019] 3. For the rental market, this invention allows for engine locking via a vehicle locking mode.

[0020] 4. This invention has reliable control, simple logic, convenient operation, and effectively protects the engine. Attached Figure Description

[0021] Figure 1 This is the control logic diagram of the present invention. Detailed Implementation

[0022] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0023] See Figure 1An engine control method based on a vehicle locking function includes:

[0024] Add a relay to the engine starter signal control line, and connect the control terminal of the relay to the engine ECU;

[0025] When the ECU executes the vehicle lock signal, the ECU's internal parameters limit the fuel injection quantity to 0, the ECU controls the relay to disconnect, and the starter motor cannot turn the engine to start;

[0026] When the ECU does not execute the lock signal, the ECU's fuel injection is normal, the ECU controls the relay to connect, and the starter motor can start the engine by turning it.

[0027] Specifically, the ECU distinguishes the status of the unit's control instrument commands and confirms the technical status based on these commands. If the technical status indicates that the pre-lubrication function has not been completed or the pre-lubrication time is less than the safe lubrication time—meaning the unit's control instrumentation was interrupted during the pre-lubrication process, resulting in the incomplete pre-lubrication function or the pre-lubrication time being less than the safe lubrication time—the ECU executes a vehicle lock signal and indicates the reason for locking. Otherwise, the ECU does not execute the vehicle lock signal. The safe lubrication time is determined based on the specific engine model, such as 10 to 20 seconds.

[0028] This method also includes: in the rental market, when the lessee of the engine fails to pay the rental fee, the engine operator sends a vehicle locking command to the engine's ECU via a remote client. After receiving the vehicle locking command, the engine's ECU executes the vehicle locking signal, preventing the engine from starting, thereby forcing the lessee to fulfill the rental contract.

[0029] In this method, after the ECU receives the start signal, the ECU obtains the setting parameters of the unit control instrument. If the pre-lubrication function of the unit control instrument is turned off or the pre-oil supply time of the unit control instrument is reduced to less than the safe lubrication time, the ECU executes the vehicle lock signal and indicates the reason for locking the vehicle; otherwise, the ECU does not execute the vehicle lock signal.

[0030] While indicating the reason for locking the vehicle, the system provides an option to pre-supply fuel according to the default strategy. After the user selects this option, the ECU sends the default fuel supply time to the engine control instrument, which then pre-supplys fuel according to the default time. After the pre-supply is completed, the ECU does not execute the vehicle lock signal. The user can start the engine safely without resetting the parameters of the engine control instrument, thus improving the convenience of using the engine.

[0031] Furthermore, the default oil supply MAP can be pre-calibrated based on the oil temperature, where the oil temperature is the oil temperature in the oil pan.

[0032] After the ECU receives the start signal, it obtains the actual oil temperature, queries the default oil supply MAP table based on the actual oil temperature to obtain the default oil supply time, and determines the pre-supply time based on the actual oil temperature, which can more effectively protect the engine.

[0033] After the ECU receives the start signal, if it detects that the oil temperature is lower than the set temperature, it can heat the oil in the oil pan by electric heating. The set temperature is 0-5℃. For example, by arranging heating wires in the oil pan, the oil can be heated to above 30℃.

[0034] The engine oil quality correction MAP can also be calibrated based on the engine oil quality parameters, which can be any one of viscosity, density, and dielectric constant. When the ECU receives the start signal, it obtains the actual engine oil quality parameters, queries the engine oil quality correction MAP based on the actual engine oil quality parameters to obtain the oil quality correction coefficient, and corrects the default fuel injection time based on the oil quality correction coefficient to improve the accuracy of the default fuel injection time and more effectively protect the engine.

[0035] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several modifications and improvements without departing from the structure of the present invention, and these will not affect the effectiveness of the implementation of the present invention or the practicality of the patent.

Claims

1. An engine control method based on a lock function, characterized by, include: A relay is added to the engine starter signal control line, and the control terminal of the relay is connected to the engine ECU; When the ECU executes the vehicle lock signal, the internal parameters of the ECU limit the fuel injection quantity to 0, the ECU controls the relay to disconnect, and the starter motor cannot turn the engine to start; When the ECU does not execute the vehicle lock signal, the fuel injection quantity of the ECU is normal, the ECU controls the relay to turn on, and the starter motor pulls the engine to start; The ECU distinguishes the status of the unit control instrument commands and confirms the technical status based on the status of the unit control instrument commands. If the technical status is that the pre-lubrication function has not been completed or the pre-lubrication time is less than the safe lubrication time, the ECU executes the vehicle lock signal and indicates the reason for locking the vehicle; otherwise, the ECU does not execute the vehicle lock signal.

2. The engine control method based on a lock function according to claim 1, characterized by, Also includes: In the rental market, when the lessee of the engine fails to pay the rental fee, the operator of the engine sends a locking command to the engine's ECU via a remote client. Upon receiving the locking command, the engine's ECU executes the locking signal.

3. The engine control method based on a lock function according to claim 1, characterized by, When the ECU receives the start signal, the ECU obtains the setting parameters of the unit control instrument. If the pre-lubrication function of the unit control instrument is turned off or the pre-oil supply time of the unit control instrument is reduced to less than the safe lubrication time, the ECU executes the vehicle lock signal and prompts the reason for locking the vehicle. Otherwise, the ECU will not execute the vehicle lock signal.

4. The engine control method based on a lock function according to claim 3, characterized by, While indicating the reason for locking the vehicle, the system provides an option to pre-supply fuel according to the default strategy. After the user selects the option to pre-supply fuel according to the default strategy, the ECU sends the default fuel supply time to the generator control instrument, so that the generator control instrument pre-supply fuel according to the default fuel supply time. After the pre-supply is completed, the ECU does not execute the vehicle locking signal.

5. The engine control method based on a lock function according to claim 4, characterized by, Pre-calibrate the default oil supply MAP based on the engine oil temperature; After the ECU receives the start signal, the ECU obtains the actual oil temperature and queries the default oil supply MAP table based on the actual oil temperature to obtain the default oil supply time.

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