Diagnosis of engine turbocharger performance
First Claim
1. The method of testing the response of a turbocharger of an internal combustion engine, comprising the steps of sensing the engine speed and the intake manifold air pressure, stabilizing the engine and the turbocharger at a speed below maximum governed speed, rapidly accelerating the engine to maximum governed speed, taking first and second measurements of the pressure after the ending has stabilized at maximum governed speed but before the turbocharger has stabilized.
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Abstract
This disclosure relates to a system for analyzing the performance of a reciprocating piston, internal combustion engine such as a diesel engine. Sensors are connected to the engine, which respond to various operating parameters, and signals representing the parameters are fed to computer processing equipment. Two of the parameters are the intake manifold pressure and the engine speed. A turbocharger of the engine includes a turbine that is driven by the engine exhaust and a compressor that delivers air to the intake manifold. The performance of the turbocharger is tested by stabilizing the engine and the turbocharger at no-load, low-idle speed, quickly accelerating the engine to maximum governed speed, and determining how the turbocharger stabilizes after the engine stabilizes at the maximum speed.
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Citations
7 Claims
- 1. The method of testing the response of a turbocharger of an internal combustion engine, comprising the steps of sensing the engine speed and the intake manifold air pressure, stabilizing the engine and the turbocharger at a speed below maximum governed speed, rapidly accelerating the engine to maximum governed speed, taking first and second measurements of the pressure after the ending has stabilized at maximum governed speed but before the turbocharger has stabilized.
- 5. Apparatus for testing a turbocharger of an internal combustion engine, comprising speed sensor means responsive to engine speed, pressure sensor means responsive to intake manifold pressure, and processor means responsive to said speed and pressure for determining when said engine has stabilized at maximum governed speed after a period of rapid acceleration, and for taking first and second time spaced pressure measurements after said engine has stabilized but before said turbocharger has stabilized.
Specification