System and method for collecting rotation speed signals of internal combustion engine

Abstract

The invention provides a system and method for collecting rotation speed signals of an internal combustion engine. The system comprises a plurality of ECUs, the first-level ECU collects magneto-electric rotation speed signals, converts the collected magneto-electric rotation speed signals into Hall rotation speed signals and sends the Hall rotation speed signals to an MCU of the first-level ECU and the adjacent second-level ECU at the same time, the second-level ECU sends the Hall rotation speed signals to an MCU of the second-level ECU and the adjacent third-level ECU, and so is the third-level ECU. The magneto-electric rotation speed signals are converted into the Hall rotation speed signals in the ECUs, and in this way, cost of a special rotation speed processing circuit for extra exploitation is saved. The number of the ECUs capable of being connected is not limited by pins of the special rotation speed processing circuit, under the condition that signal transmission delay is not considered, numerous ECUs receive the rotation speed signals at the same time, and consistency that oil injection time can be calculated by the multiple ECUs at the same time is guaranteed.

Description

technical field [0001] The invention relates to the technical field of internal combustion engine control, in particular to a system and method for collecting rotational speed signals of an internal combustion engine. Background technique [0002] In electronically controlled engine control, the speed signal is the most important input signal, because all the important functions of the engine are realized based on the precise speed signal. For example, by collecting the engine speed signal to control the injection timing with high precision. [0003] At present, in high-power multi-cylinder high-pressure common rail electronically controlled internal combustion engines, especially in internal combustion engines with more than six cylinders, such as large power generation equipment and ships, more than one ECU is required, and at least two ECUs are often required to control multiple cylinders. Complete injection control. In this way, each ECU needs to collect the speed sign...

AI Technical Summary

Problems solved by technology

[0009] However, this method has relatively high requirements on the rotational speed processing circuit 100, resulting in relatively high development costs for the entire vehicle controller. Since the rotational speed processing circuit 100 is a circuit independent of the ECU, it is necessary to separately equip the housing wire harness and the like, and Reliability needs to be verified, and the life of the speed processing circuit 100 cannot be guaranteed to be consistent with that of the ECU

Therefore, using a dedicated controller greatly increases the cost of the entire system, and is limited by the number of pins of the dedicated controller, so it cannot expand countless ECUs, and the flexibility is low

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