Automatic lighting device and lighting method of emergency warning lamp using intake negative pressure of engine

摘要

An object of the present invention is to automatically turn on the emergency warning light by using an engine negative pressure to automatically turn on the emergency warning light by using the engine negative pressure when the foot off the accelerator pedal when the fuel cut phenomenon occurs during the high-speed driving of the vehicle and To provide a lighting method.;In order to achieve the above object, the apparatus of the present invention includes a housing having a diaphragm chamber in which the intake negative pressure of the engine acts; An air intake pressure line for connecting the diaphragm chamber and the intake machine of the engine; A negative pressure switch for connecting the circuit on when the diaphragm moves by the intake negative pressure acting on the diaphragm chamber; An emergency warning light that is turned on when the negative pressure switch is connected; Characterized in that the emergency warning light automatic lighting method of the present invention comprises the steps of detecting that the accelerator pedal switch is off; Detecting a change in the engine negative pressure, converting the signal into an electrical signal, and outputting the electrical signal; Turning on an emergency warning light when the electrical signal value is greater than or equal to a reference value; turning off the emergency warning light after a predetermined time elapses after the emergency warning light is turned on; Characterized in that consists of.