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Study of Variable Nozzle Turbocharger Matching on the Natural Gas Engine

Hui Zhu

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Abstract

A variable nozzle turbocharger(VNT) was applied on the 488 natural gas engine,the VNT electronically controlled system was designed,and the VNT matching regulation was studied based on the engine tests.The experimental results show that the VNT regulating discipline for the CNG engine is related to the throttle valve opening and the engine revolution speed.The power and torgue of the CNG engine increase remarkably by using VNT,the maximum power rises from 58kW to 73kW,the maximum torque increases from 156N·m to 212N·m,and the revolution speed at the maximum torque decreases,the economy and power performance of the CNG engine are improved greatly.

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What this paper is about

A variable nozzle turbocharger(VNT) was applied on the 488 natural gas engine,the VNT electronically controlled system was designed,and the VNT matching regulation was studied based on the engine tests.The experimental results show that the VNT regulating discipline for the CNG engine is related to the throttle valve opening and the engine revolution speed.The power and torgue of the CNG engine increase remarkably by using VNT,the maximum power rises from 58kW to 73kW,the maximum torque increases from 156N·m to 212N·m,and the revolution speed at the maximum torque decreases,the economy and power performance of the CNG engine are improved greatly.

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Available abstract

A variable nozzle turbocharger(VNT) was applied on the 488 natural gas engine,the VNT electronically controlled system was designed,and the VNT matching regulation was studied based on the engine tests.The experimental results show that the VNT regulating discipline for the CNG engine is related to the throttle valve opening and the engine revolution speed.The power and torgue of the CNG engine increase remarkably by using VNT,the maximum power rises from 58kW to 73kW,the maximum torque increases from 156N·m to 212N·m,and the revolution speed at the maximum torque decreases,the economy and power performance of the CNG engine are improved greatly.

Key concepts: Turbocharger, Throttle, Automotive engineering, Nozzle, Torque, Engine power, Natural gas, Power (physics)

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