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Intelligent diesel engine runaway protector

A technology of flying car protection and diesel engine, applied in mechanical equipment, engine control, combustion engine, etc., can solve the problems of easy misoperation, bulky, complex mechanism, etc., and achieve the effect of preventing misoperation, small size, and reliable work.

Inactive Publication Date: 2012-09-19
XIHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] In order to overcome the shortcomings of the existing overrunning protection device, such as complex mechanism, bulky size, easy misoperation and low reliability

Method used

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  • Intelligent diesel engine runaway protector
  • Intelligent diesel engine runaway protector
  • Intelligent diesel engine runaway protector

Examples

Experimental program
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Embodiment Construction

[0015] The present invention will be described in detail below in conjunction with specific embodiments.

[0016] exist figure 1 Among them, the control circuit is the core of the diesel engine "speeding" protection device, including: speed signal acquisition and conversion circuit, "speeding" judgment unit, "speeding" time judgment unit and logic control unit. Its principle diagram is:

[0017] ① In the rotational speed signal acquisition and conversion circuit, the present invention uses a gear rotational speed sensor to acquire the signal of the rotational speed of the diesel engine. The relationship between frequency and rotational speed is:

[0018] f in = n 60 × Z - - - ( 1 )

[0019] Among them, n(r / min) is the speed of diesel engine, f in (Hz) is the frequency of the output electri...

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Abstract

The invention discloses an intelligent diesel engine runaway protector, which comprises a control circuit and an execution element, the control circuit converts the rotational speed signal of a diesel engine into a voltage signal, compares the voltage signal with set runaway threshold voltage Vf, and judges whether the runaway of the diesel engine takes place according to a comparison result; if runaway duration Tf is longer than runaway limiting time T0, then the control circuit outputs a corresponding signal to control the execution element to operate; and the execution element is used for reacting to the opening and closing of the oil supply circuit of the diesel engine according to the signal outputted by the control circuit. The intelligent diesel engine runaway protector can monitor the operating condition of the diesel engine in real time, can be self- diagnosed, and can judge whether the runaway of the diesel engine is false or true in order to prevent misoperation. A two-position three-way electromagnetic valve is adopted as the execution element to directly act on the oil supply circuit of the diesel engine, is small, and can reliably operate. The intelligent diesel engine runaway protector can be adjusted to control the runaway speeds of different diesel engines.

Description

technical field [0001] The invention relates to a protection device for a diesel engine, in particular to a protection device capable of self-diagnosing, identifying a diesel engine runaway, and cutting off the main oil supply circuit of the diesel engine, thereby protecting the diesel engine. Background technique [0002] At present, the common working methods of diesel engine "speeding" protection devices are: ① Control the intake valve of the diesel engine. When the diesel engine appears "speeding", manually close the intake valve to block the air from continuing to enter the cylinder, so that the diesel engine stops and achieves the purpose of protection. Purpose. This kind of device has a complex mechanism and a large volume. Due to the manual judgment and operation, it is prone to misoperation; ② directly acts on the fuel stop arm (flame breaker) ), push the rack of the fuel injection pump back to the zero fuel supply position, so that the fuel supply of the fuel inje...

Claims

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Application Information

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IPC IPC(8): F02D41/22
CPCY02T10/40
Inventor 曾东建曾渝理
Owner XIHUA UNIV
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