Engine control system and method and engine

Abstract

The invention discloses an engine control system and method and an engine. The control system comprises a first ECU, a second ECU, a first communication bus and at least one second communication bus;the first ECU is used for controlling engine operation and sending a heartbeat signal through the first communication bus and the second communication buses; the second ECU is used for detecting the heartbeat signal and sending a heartbeat feedback signal when receiving the heartbeat signal; when the second ECU does not detect the heartbeat signal transmitted by the first communication bus in thefirst preset time period, a heartbeat signal transmitted by the second communication buses is detected; and when the second ECU does not detect the heartbeat signal transmitted by the second communication buses in the second preset time period, it is judged that the first ECU beaks down, and the first ECU is switched to the second ECU starts to control engine operation. According to the technicalscheme, the problem that the first ECU fault is judged by mistake due to the fact that the first communication bus breaks down can be avoided, and the engine control reliability is improved.

Description

technical field [0001] Embodiments of the present invention relate to engine control technologies, and in particular to an engine control system, a control method, and an engine. Background technique [0002] Due to its advantages in fuel economy and emissions, electronically controlled engines have gradually become the mainstream trend of industry development. However, the development of electronically controlled engines is still restricted by many factors, such as the reliability of the control system. Improving the reliability of the control system is particularly important to ensure the normal operation of the engine, especially in the marine field, it is required to maintain the normal operation of the engine even when the control system fails. [0003] In addition, the requirements for electronically controlled engines in Chapter 9 of Chapter 3 of China Classification Society’s Classification Rules point out that: the equipment in the electronic control system that may...

AI Technical Summary

Problems solved by technology

The existing technology mainly has the following disadvantages: 1. The main and standby ECUs perform state monitoring through the security module as a third party. The main and standby ECUs only communicate with the security module through a CAN line. When the CAN line fails, the main and standby ECUs will not be able to communicate with the security module The security module communicates normally, but the security module cannot receive the heartbeat monitoring signal, which leads to the security module being unable to correctly determine whether the ECU is faulty or the CAN line is faulty; 2. The switch between the active and standby ECUs must be controlled by the security module, and the joint development of security and ECU control units is risky and difficult larger

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