Patent ID: 9140200
Filing Date: 2015-09-22
Classification: F02D,Y02T

Abstract:
1. An idle throttle valve control method for a diesel vehicle, comprising: determining whether an idle condition of the vehicle is satisfied; controlling a throttle valve based on an idle air map and controlling an exhaust gas recirculation (EGR) valve based on an idle EGR map, if it is determined that the vehicle is in the idle condition; determining whether an idle release condition is satisfied during idle control; controlling the throttle valve based on a normal air amount map, and maintaining the EGR valve as it is in the idle control, when the idle release condition is satisfied; determining whether an EGR map return condition is satisfied; and controlling the EGR valve based on a normal EGR map, if the EGR map return condition is satisfied; wherein the EGR valve EGR map return condition is satisfied when the vehicle is in an overrun condition or a gear shifting condition, and wherein the controlling of the EGR valve based on the normal EGR map starts at a time different than the controlling of the throttle valve based on the normal air amount map, thereby preventing abrupt movement of the vehicle, reducing noise generated by the vehicle or a combination thereof.