Apparatus and method for testing using dynamometer

Abstract

A test method for a vehicle powertrain includes, during a first test of a first vehicle or a portion of a first vehicle on a dynamometer, coordinatingly controlling (i) an accelerator pedal, an accelerator pedal signal, a fuel injector, a manifold pressure, a motor controller, or a throttle valve according to a load schedule and (ii) the dynamometer according to a speed schedule such that the dynamometer applies dynamic torque that causes a powertrain of the first vehicle or portion of the first vehicle to produce dynamic powertrain torque. The test method also includes recording values defining a history of the dynamic torque, and during a second test of the first vehicle or portion of the first vehicle on the dynamometer or another dynamometer, or during a second test of a second vehicleor a portion of a second vehicle on the dynamometer or another dynamometer, coordinatingly controlling (iii) an accelerator pedal, an accelerator pedal signal, a fuel injector, a manifold pressure, amotor controller, or a throttle valve according to the values defining the history of the dynamic torque and (iv) the dynamometer or the another dynamometer according to the speed schedule such thatthe dynamometer or the another dynamometer applies dynamic torque that causes a powertrain of the first vehicle or portion of the first vehicle or a powertrain of the second vehicle or portion of thesecond vehicle to reproduce the dynamic powertrain torque.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of U.S. Provisional Application No. 62 / 610,541, filed December 27, 2017, the contents of which are incorporated herein by reference. Background technique [0003] The present disclosure relates to the technical fields of measurement and analysis of automobile exhaust emissions and measurement of vehicle energy efficiency. More specifically, the present disclosure relates to predicting exhaust emissions from vehicles with internal combustion engines (ICEs), including emissions from hybrid electric vehicles (HEVs), based on simulating real-world conditions during laboratory testing, and predicting emissions in real-world The field of energy efficiency of operating vehicles of all powertrain types. [0004] Modern vehicles with ICE can operate reliably in virtually any combination of environments, road gradients, and driving conditions found on Earth. Such vehicles are common throughout...

AI Technical Summary

Problems solved by technology

However, laboratory testing remains a valuable tool for vehicle manufacturers and regulators during vehicle development, as the testing protocol produces very reproducible test results

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