Engine controller

Abstract

The utility model relates to the technical field of engines, and particularly discloses an engine controller which comprises a mounting box, and a circuit board is integrated in the mounting box. The circuit board is provided with a power module, an oil injection driving module, a high-side driving module, a first low-side driving module, a second low-side driving module, an analog input module, a digital input module, a frequency input module, a rotating speed signal module, a CAN communication module, an atmospheric pressure detection module, an in-board temperature detection module and an external watchdog module. According to the utility model, one ECU signal controls eight fuel injectors at the same time, so that the rotating speed is accurately controlled, signal transmission delay and error risk are avoided, the fault probability of the previous controller is greatly reduced, the fault rate is reduced to 1 / 2 of the original fault rate, the reliability of an engine control system is improved, and the reliability of the engine control system is improved. The design of a control wire harness of an electrical part and the installation of a real object are greatly simplified, and the time cost and the labor cost are saved.

Description

Technical Field

[0001] The utility model relates to the technical field of engines, in particular to an engine controller. Background Art

[0002] With the rapid development of the automobile and engine industries, changes in the domestic and international trade environment, and increasingly strict bans on the sale of domestic electronic components in Europe and the United States, many electronic components and chips that were previously imported are now difficult to purchase. More importantly, imported controllers require two ECU controllers to work at the same time, which will cause data transmission delays, CAN communication interruptions, and errors.

[0003] With the increasing application of electronically controlled diesel engines, higher requirements are placed on the precise control, functional indicators, emission indicators, and autonomous control of power equipment. Currently, there is no domestically produced ECU controller on the market that can control 8 cylinders at the same time. In order to change the current situation, the research and development of a new engine controller is imperative. Utility Model Content

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies in the prior art, the utility model provides an engine controller to solve the technical problem that as the application of electronically controlled diesel engines becomes more and more widespread, higher requirements are put forward for the precise control, functional indicators, emission indicators, and autonomous control of power equipment. At present, there is no single ECU controller on the market that can control 8 cylinders at the same time.

[0006] (II) Technical solution

[0007] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0008] An engine controller comprises an installation box, in which a circuit board is integrated, on which a power supply module, an injection drive module, a high-side drive module, a low-side drive module 1, a low-side drive module 2, an analog input module, a digital input module, a frequency input module, a rotation speed signal module, a CAN communication module, an atmospheric pressure detection module, an on-board temperature detection module, a signal input module, a signal output module and an external watchdog module are arranged, and the injection drive module controls the opening and closing of an injection relay.

[0009] Preferably: the power module is used to connect to the power supply and provide the required voltage for each module of the controller, and the input module signals of the circuit board include crankshaft speed signal, camshaft speed signal, cooling water temperature signal, oil temperature signal, oil pressure signal, intercooler temperature signal, boost pressure signal, rail pressure signal and ambient pressure signal.

[0010] Preferably: the output module signal of the circuit board includes a VCV valve duty cycle signal and a VNT valve duty cycle signal, the output module signal of the circuit board is used to control the relevant actuators of the engine, the CAN communication module includes a calibration CAN and a communication CAN, the calibration CAN is used for local engine calibration monitoring, and the communication CAN is used for data transmission between the engine ECU controller and other controllers.

[0011] (III) Beneficial effects

[0012] The engine controller controls an 8-cylinder engine at the same time and can transmit data through CAN communication at the same time. In the past, the master and slave ECUs controlled the injectors of 4 cylinders respectively, which would cause 4 cylinders of the engine to work and 4 cylinders to not work due to slave ECU communication or hardware failure. At the same time, since a chip controls 8 injectors at the same time, there is no data transmission delay, making the control of each cylinder very accurate. At the same time, a single ECU controller reduces the failure rate. Compared with traditional silicone oil fans, it has the following advantages:

[0013] 1. Control 8 injectors simultaneously through one ECU signal to achieve precise speed control without signal transmission delay and error risk;

[0014] Second, a single controller controls the injectors of eight cylinders at the same time, which greatly reduces the probability of failure of the previous two controllers, and the failure rate is reduced to 1 / 2 of the original, thus improving the reliability of the engine control system;

[0015] Third, compared with the previous dual controllers, the single ECU controller greatly simplifies the design and installation of the electrical control harness, saving time and labor costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0017] Figure 1 This is a system structure diagram of the engine controller of the utility model;

[0018] Figure 2 This is the overall hardware architecture design diagram of the ECU of the engine controller of the utility model.

[0019] Legend: 11. Power module; 12. Analog input module; 13. Digital input module; 14. Frequency input module; 15. Speed ​​signal module; 16. CAN communication module; 17. Atmospheric pressure detection module; 18. On-board temperature detection module; 19. External watchdog module; 2. Injection drive module; 21. High-side drive module; 22. Low-side drive module one; 23. Low-side drive module two.

[0020] Specific implementation party 3

[0021] The embodiment of the present application provides an engine controller, which effectively solves the technical problem that as the application of electronically controlled diesel engines becomes more and more widespread, higher requirements are put forward for the precise control, functional indicators, emission indicators, and autonomous control of power equipment, and there is currently no single ECU controller on the market that can control 8 cylinders at the same time. Example

[0022] according to Figure 1 and Figure 2 As shown, the technical solution in the embodiment of the present application effectively solves the technical problem that as the application of electronically controlled diesel engines becomes more and more widespread, higher requirements are put forward for the precise control, functional indicators, emission indicators, and autonomous controllability of power equipment. At present, there is no single ECU controller on the market that can control 8 cylinders at the same time. The overall idea is as follows:

[0023] In view of the problems existing in the prior art, the utility model provides an engine controller, including an installation box, a circuit board is integrated in the installation box, and a power supply module 11, an injection drive module 2, a high-side drive module 21, a low-side drive module 1 22, a low-side drive module 2 23, an analog input module 12, a digital input module 13, a frequency input module 14, a speed signal module 15, a CAN communication module 16, an atmospheric pressure detection module 17, an on-board temperature detection module 18, a signal input module, a signal output module and an external watchdog module 19 are arranged on the circuit board. The injection drive module 2 controls the opening and closing of 8 injection relays. The original imported ECU controller is divided into two master and slave ECU controllers. The switch of the fuel injectors of the four cylinders of the engine is controlled separately, which requires the two controllers to maintain synchronous communication at all times. However, since they are two different ECU controllers, there will actually be a delay between the master and slave controllers during the data transmission process through CAN communication, which will cause the 8-cylinder fuel injectors to have a hysteresis in the control of 1-4 cylinders and 5-8 cylinders. The more serious situation is: when the CAN communication between the master and slave ECU is disconnected, the 8-cylinder engine actually has only 4 cylinders working, and the other 4 cylinders will not be controlled for injection due to CAN communication interruption for some reason, which will cause serious problems during the operation of the engine and even damage the engine. The newly developed domestic ECU is a controller that controls the work of the fuel injectors of 8 cylinders at the same time, which fundamentally avoids the occurrence of the above problems, making the control accuracy higher, improving the engine operation efficiency, and reducing the failure points and failure rate.

[0024] The power module 11 is used to connect to the power supply and provide the required voltage to each module of the controller. The input module signals of the circuit board include crankshaft speed signal, camshaft speed signal, cooling water temperature signal, oil temperature signal, oil pressure signal, intercooler temperature signal, boost pressure signal, rail pressure signal and ambient pressure signal. The output module signals of the circuit board include VCV valve duty cycle signal and VNT valve duty cycle signal. The output module signals of the circuit board are used to control the relevant actuators of the engine. The CAN communication module 16 includes calibration CAN and communication CAN. The calibration CAN is used for local engine calibration monitoring, and the communication CAN is used for data transmission between the engine ECU controller and other controllers.

[0025] Working principle:

[0026] An engine controller includes an installation box, and a power supply module, an injection drive module 2 and a high-side drive module 21, a low-side drive module 1 22, a low-side drive module 2 23, an analog input module 12, a digital input module 13, a frequency input module 14, a speed signal module 15, a CAN communication module 16, an atmospheric pressure detection module 17, an in-board temperature detection module 18, and an external watchdog module 19, which are arranged in the installation box and integrated with each other. An engine controller controls the injection relays of 8 cylinders to work at the same time, and the engine that controls 8 cylinders at the same time can realize data transmission through CAN communication at the same time. In the past, the master and slave ECUs controlled the injectors of 4 cylinders respectively, which would cause the situation that 4 cylinders of the engine worked and 4 cylinders did not work due to the communication or hardware failure of the slave ECU. At the same time, because a chip controls 8 injectors at the same time, there is no data transmission delay site, so that the control of each cylinder They are all very precise, which fundamentally solves the problem that the original imported ECU controller uses two master and slave ECU controllers to control the switches of the injectors of the four cylinders of the engine respectively. The two controllers must maintain synchronous communication at all times. However, since they are two different ECU controllers, there will actually be a delay between the master and slave controllers during the data transmission process through CAN communication. This will cause the 8-cylinder injectors to have 1-4 cylinder control and 5-8 cylinder control. There will be a hysteresis in the control. The more serious situation is: when the CAN communication between the master and slave ECU is disconnected, the 8-cylinder engine actually has only 4 cylinders working. The CAN communication of the other 4 cylinders is interrupted for some reason and the injection control will not be performed. This will cause serious problems in the operation of the engine and even damage the technical problem of the engine. The control accuracy is higher, the engine operating efficiency is improved, and the failure points and failure rate are reduced.

[0027] Finally, it should be noted that: Obviously, the above embodiments are only examples for clearly explaining the present invention, and are not intended to limit the implementation methods. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the present invention.

Claims

1. An engine controller, comprising a mounting box, characterized in that: A circuit board is integrated in the installation box, and the circuit board is provided with a power module (11), an injection drive module (2), a high-side drive module (21), a low-side drive module 1 (22), a low-side drive module 2 (23), an analog input module (12), a digital input module (13), a frequency input module (14), a speed signal module (15), a CAN communication module (16), an atmospheric pressure detection module (17), an on-board temperature detection module (18) and an external watchdog module (19); The fuel injection drive module (2) controls the opening and closing of eight fuel injection relays.

2. An engine controller according to claim 1, characterized in that: The power supply module (11) is used to connect to a power supply and provide required voltages for various modules of the controller.

3. An engine controller according to claim 2, characterized in that: The input module signals of the circuit board include a crankshaft speed signal, a camshaft speed signal, a cooling water temperature signal, an oil temperature signal, an oil pressure signal, an intercooler temperature signal, a boost pressure signal, a rail pressure signal and an ambient pressure signal.

4. An engine controller according to claim 3, characterized in that: The output module signal of the circuit board includes a VCV valve duty cycle signal and a VNT valve duty cycle signal.

5. An engine controller according to claim 4, characterized in that: The output module signal of the circuit board is used to control the relevant actuators of the engine.

6. An engine controller according to claim 5, characterized in that: The CAN communication module (16) comprises a calibration CAN and a communication CAN, wherein the calibration CAN is used for local engine calibration monitoring, and the communication CAN is used for data transmission between the engine ECU controller and other controllers.

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