Turbocharger protection systems and methods

• Main Authors: DE MARCO MIRCO, MANTA EUGENIO
• Format: Patent
• Language: Chinese; English
• Published: 12.11.2019
• Subjects: BLASTING; COMBUSTION ENGINES; COMBUSTION ENGINES IN GENERAL; HEATING; HOT-GAS OR COMBUSTION-PRODUCT ENGINE PLANTS; INTERNAL-COMBUSTION PISTON ENGINES; LIGHTING; MECHANICAL ENGINEERING; WEAPONS

Methods for protecting turbochargers of engine systems include determining a speed gradient of the turbocharger and implementing a turbocharger speed protection action if the determined speed gradientis above a speed gradient threshold. Implementing a protection action comprises limiting engine torque, engine speed, vehicle speed, and/or fuel injection to the engine. The method can further include determining a cold start condition prior to determining the speed gradient of the turbocharger. A cold start condition can be determined based on ambient temperature, engine oil temperature, or engine coolant temperature. The method can further include, subsequent to implementing the turbocharger speed protection action, disabling the turbocharger speed protection action when a subsequently determined turbocharger speed gradient is below the speed gradient threshold. Systems for implementing the methods are also disclosed. 用于保护发动机系统的涡轮增压器的方法，包括确定涡轮增压器的速度梯度，并且如果确定的速度梯度高于速度梯度阈值，则实施涡轮增压器速度保护动作。实施保护动作包括限制发动机扭矩、发动机速度、车辆速