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An electronic control system for a marine multi-cylinder diesel engine and a fuel injection synchronization method thereof

A technology of electronic control system and diesel engine, which is applied in the direction of electrical control, engine control, mechanical equipment, etc. It can solve the problems of delay uncertainty, fuel injection delay, and increase the software complexity of the cylinder control unit, and achieve precise trigger control, The effect of reducing performance requirements

Active Publication Date: 2021-08-27
CSSC POWER INST CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Using the communication synchronization method, due to the delay of communication, the fuel injection timing of each cylinder control unit will be delayed, and due to the change of communication data volume, it will also cause the uncertainty of this delay
However, if the synchronization method of the crankshaft synchronous signal is directly adopted, since the crankshaft signal must be frequency-divided and counted, and the timing of the fuel injection timing must be counted, etc., this will put forward higher performance requirements for the control chip of the cylinder control unit. Will increase the software complexity of the cylinder control unit

Method used

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  • An electronic control system for a marine multi-cylinder diesel engine and a fuel injection synchronization method thereof
  • An electronic control system for a marine multi-cylinder diesel engine and a fuel injection synchronization method thereof
  • An electronic control system for a marine multi-cylinder diesel engine and a fuel injection synchronization method thereof

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Embodiment 1

[0022] figure 1 A composition diagram of an electronic control system for a marine multi-cylinder diesel engine provided in Embodiment 1 of the present invention, as shown in figure 1 As shown, the system includes a main control unit 11 and a plurality of cylinder control units 12 .

[0023] The main control unit 11 and each cylinder control unit 12 are connected through a communication bus 13 for transmitting data packets of cylinder serial numbers and fuel injection parameters; The trigger signal line 14 is connected to transmit the fuel injection trigger signal; the main control unit 11 is used to receive and calculate the fuel injection parameters and the fuel injection trigger signal according to the crankshaft synchronous signal, and respectively pass the communication bus 13 and the fuel injection trigger The signal line 14 is transmitted to each cylinder control unit 12; the cylinder control unit 12 is used to drive the cylinder fuel injection action according to the ...

Embodiment 2

[0031] image 3 It is a flow chart of a fuel injection synchronization method for a marine multi-cylinder diesel engine provided in Embodiment 2 of the present invention. This embodiment is applicable to the fuel injection control of a marine multi-cylinder low-speed diesel engine. Diesel engine electronic control system to implement.

[0032] The above method specifically includes the following steps:

[0033] Step 310, the main control unit receives the crankshaft synchronization signal, and calculates fuel injection parameters and fuel injection trigger signals.

[0034] Among them, the crankshaft synchronous signal is one of the most important input signals in the engine control system, and it is an indispensable signal for controlling fuel injection. The crankshaft synchronous signal is a pulse signal.

[0035] Among them, the fuel injection parameters include fuel injection pulse width and fuel injection timing. The fuel injection pulse width is the fuel injection pul...

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Abstract

The embodiment of the invention discloses an electronic control system of a marine multi-cylinder diesel engine and a fuel injection synchronization method thereof. The electronic control system includes a main control unit and a plurality of cylinder control units, and the main control unit and each cylinder control unit are respectively connected through a communication bus and a fuel injection trigger signal line for transmitting the cylinder serial number and fuel injection parameters The data packet and the fuel injection trigger signal; the main control unit is used to receive and calculate the fuel injection parameters and the fuel injection trigger signal according to the crankshaft synchronous signal, and send the fuel injection trigger signal to each cylinder control unit through the communication bus and the fuel injection trigger signal line respectively. Transmission: the cylinder control unit is used to drive the cylinder fuel injection action according to the fuel injection parameters when receiving the fuel injection trigger signal. The technical solution of the embodiment of the present invention can realize precise trigger control for the fuel injection drive, and at the same time reduce the performance requirement for the control chip of the cylinder control unit.

Description

technical field [0001] Embodiments of the present invention relate to the technical field of engine electronic control, in particular to an electronic control system for a marine multi-cylinder diesel engine and a fuel injection synchronization method thereof. Background technique [0002] Marine diesel engines are commonly used in civilian ships, small and medium ships and conventional submarines. Marine diesel engines are generally divided into high-speed, medium-speed and low-speed diesel engines, among which marine high-power low-speed diesel engines are one of the main power forms of ships at present. [0003] Marine high-power low-speed diesel engines usually use an electronic control system consisting of a Main Control Unit (MCU) and multiple cylinder control units (Cylinder Control Units, CCU) to control the fuel injection operation of the diesel engine. The synchronization between the main control unit and the cylinder control unit includes the synchronization meth...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/40F02D41/00
CPCF02D41/008F02D41/401
Inventor 彭海勇
Owner CSSC POWER INST CO LTD