Automobile engine circuit with overload delay start function

The invention discloses an automobile engine circuit with the overload delay start function. The automobile engine circuit comprises a sampling module, a switching tube, an output bias module connected with the switching tube, a driving circuit connected with the output bias module, a delay start module connected with the sampling module and a release module connected with the delay start module, wherein the sampling module and the switching tube are connected with an engine coil, and the delay start module is connected with the driving circuit through an OR gate. A switching signal of the driving module controls switch-off or switch-on of the switching tube through the output bias module, and the sampling module samples the voltage of the engine coil in real time; when overloading occurs, the delay start module is started, and then the switching tube is controlled to be switched off through the Or gate and the driving module in sequence so that the phenomenon that the engine coil is burnt out due to long-term overloading can be avoided; when the release module finishes discharging, the delay start module sends a low level signal, and the switching tube is controlled to be switched on again through the Or gate and the driving module so that the phenomenon that the switching tube does not work due to long-term switch-off can be avoided.