Method for controlling a vehicle including an idle stop and go function

A method for controlling a vehicle including an idle stop function during operation of the vehicle, the method comprising:

• receiving, by a controller, a detection signal required to perform the idle stop function;
• and
• controlling, by the controller, in response to the detection signal, the vehicle to enter into an idle stop state, wherein a fuel supply to an engine of the vehicle is cut off and the engine stops when the vehicle decelerates or stops according to the idle stop function,
• wherein the detection signal includes (a) a fuel cut off signal that is in an on state when the vehicle decelerates, is in an off state at a reference revolution number of the engine, and indicates whether a fuel supply to the engine is cut off, (b) a gear engagement signal indicating whether a gear included in a transmission of the vehicle is engaged, (c) a clutch pedal signal indicating whether a clutch pedal operating a clutch of the vehicle is operated, and (d) a brake pedal signal indicating whether a brake pedal of the vehicle is operated,
• wherein the controller is configured to generate an idle stop entry signal based on (i) the fuel cut off signal that is in an on state, (ii) the gear engagement signal that is in an on state, (iii) the clutch pedal signal that is in an off state, and (iv) the brake pedal signal that is in an on state, and wherein the controller is configured to enter the vehicle into the idle stop and go state based on the idle stop and go entry signal,
• wherein the reference revolution number of the engine is greater than an idle revolutions per minute of the engine and has a value close to the idle revolutions per minute, and
• wherein the gear of the transmission is in an engagement state and the clutch pedal signal is in an off state when the fuel cut off signal is in an on state while the vehicle is in the idle stop state during the operation of the vehicle.