Fault diagnosis method of cold start emission reduction system and vehicle thereof

Abstract

The invention discloses a fault diagnosis method of a cold start emission reduction system and a vehicle thereof. The method confirms a change in torque reserve compared to a torque reserve confirmed for ignition timing at cold start by any one of operation of an electrical load device, operation of an alternator, operation of a purge valve, operation of an air conditioner, a shift state of a transmission, and a coolant temperature state of an engine, and determining a failure or normality of any one of an electrical load device, an alternator, a purge valve, and an air conditioner using a change in the torque reserve to apply a determination result to determine whether the cold start E / M reduction system is abnormal, thereby ensuring accuracy of failure diagnosis of components for cold start E / M reduction.

Description

technical field [0001] The present invention relates to a cold start control, and in particular to a vehicle that passes the idle torque reserve due to the operation of the E / M reduction system compared to the maximum braking torque (MBT) delayed Changes in Idle Torque Reserve to Achieve Cold Start Emissions (E / M) Reduction System Fault Diagnosis. Background technique [0002] Since the generation of emissions increases at the time of cold start of the vehicle, cold start control for emission reduction is performed. [0003] As an example, cold start control performs cold start system fault diagnosis based on engine revolutions per minute (RPM), and cold start system fault diagnosis is performed for injectors that inject fuel, spark plugs for combustion, advance for adjusting cams A continuously variable valve timing (CVVT) system of angle / retard angle phase timing and the like are implemented. Therefore, cold start control helps to suppress the increase of emissions durin...

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Problems solved by technology

[0004] However, cold start system failure diagnosis is a method in which various components are connected to each other so that each component has no failure, but there is difficulty in diagnosing the occurrence of system failure in which emissions are systematically increased

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