Repairing protection circuit of engine

Abstract

The invention discloses a repairing protection circuit of an engine. By the circuit, the automatic switching of front and back starting states of the engine can be realized without manual setting. The repairing protection circuit of the engine comprises a front starting button, a back starting button, a starting relay, a starting motor, a switching relay and a travel switch, wherein a starting trigger end of the starting motor is connected with an anode of a power supply by a normally open contact group of the starting relay; a control end of the switching relay is connected with the anode ofthe power supply; respective grounding ends of the starting relay and the starting motor are connected with a cathode of the power supply; stirring contacts of the switching relay are connected with the control end of the starting relay; normally open contacts of the switching relay are connected with the anode of the power supply by the back starting button; normally closed contacts of the switching relay are connected with the anode of the power supply by the front starting button; and the grounding end of the switching relay is connected with the cathode of the power supply by the travel switch. In the repairing protection circuit of the engine, by arranging the travel switch which is used for detecting the opening and closing of an engine compartment door, the engine is in a normal starting state.

Description

Technical field [0001] The invention relates to an automobile engine, in particular to an overhaul protection circuit of the engine. Background technique [0002] Modern passenger cars are mostly rear-engined vehicles. In order to facilitate the inspection and repair of the rear-mounted engine, a rear-start stall device is installed in the engine compartment, which is convenient for maintenance personnel to use when the engine is faulty. Normal maintenance devices are equipped with front and rear start switches. When the maintenance personnel are overhauling the engine, they need to switch the switch to the rear start state to prevent the front cab personnel from operating the start switch by mistake and causing accidental injury to the maintenance personnel. Some maintenance devices are even equipped with a key-type knob switch, if the key is removed, the maintenance safety can be better protected. However, sometimes the maintenance personnel forget to switch the switch or remo...

AI Technical Summary

Problems solved by technology

However, sometimes the maintenance personnel forget to switch the switch or pull out the key because they are busy with maintenance. If they operate by mistake at this time, they may cause personal injury.

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