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Protection method and system for electric control diesel engine

A diesel engine and protection system technology, applied in the direction of combustion engine, engine control, machine/engine, etc., can solve problems such as continuous starting

Active Publication Date: 2011-07-27
SANY MARINE HEAVY IND +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to provide an electronically controlled diesel engine protection method and system, which can solve the problem of continuous starting of the engine in a short period of time under the condition of low oil pressure or no oil

Method used

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  • Protection method and system for electric control diesel engine
  • Protection method and system for electric control diesel engine
  • Protection method and system for electric control diesel engine

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Embodiment Construction

[0031] In order to enable those skilled in the art to better understand and implement the present invention, the following first introduces the J1939 communication protocol widely used in vehicles.

[0032] The J1939 protocol is a high-speed communication standard used to support real-time closed-loop control functions between electronic control units distributed in different positions of the vehicle. Its data transmission rate is 250KB / S, and its communication, physical layer and data link layer are based on CAN2. 0B as the basis. Use Protocol Data Unit (PDU, Protocol Data Unit) to transmit information, and each PDU is equivalent to a frame in the CAN protocol.

[0033] J1939 is a transmission protocol responsible for data transmission in communication, and its functions are divided into two parts: data splitting, packaging and reorganization, and connection management. PDU consists of 29-bit identifier and 0-8 bytes of data. J1939 provides a complete network definition usi...

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Abstract

The invention provides a protection method and a system for electric control diesel engine. The method comprises: monitoring running state of an engine; transmitting the monitored running state of the engine to a vehicular controller in the form of message; when the vehicular controller judges that the engine has critically faulted by analyzing the message, transmitting a control instruction to the engine to prohibit the engine from starting. The protection method and a system for electric control diesel engine, by monitoring whether the engine is critically faulted, transmitting a control instruction to the engine to prohibit the engine from starting when the engine is critically faulted, can prevent the engine from damage caused by continuous restart under the condition that the engine is faulted and the failure is not removed.

Description

technical field [0001] The invention relates to the technical field of diesel engine control, in particular to an electronically controlled diesel engine protection method and system. Background technique [0002] At present, the electronic control technology of electronically controlled diesel engines is mainly to improve the power and fuel economy of diesel engines. For example: high injection pressure, independent injection pressure control, improved fuel economy of diesel engines, minimum fuel quantity control capability, rapid fuel cut-off capability and reduced driving torque shock load, etc. [0003] The electronically controlled diesel engine using electronic control technology can realize the detection of diesel engine performance and diagnosis of faults. For example, when the engine has faults such as high water temperature, low water level or low oil pressure, the engine electronic control unit will detect these faults, and when the fault lasts for a certain peri...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/22F01M1/20
CPCY02T10/40
Inventor 周嵩云李璐
Owner SANY MARINE HEAVY IND