System for testing and evaluating the behaviour and energy efficiency of the drive system of a hybrid-electric motor vehicle

Abstract

The system makes it possible to evaluate different architectures / operating modes (pure electric, series, parallel, parallel / series, electric+range extension) in a quasi realistic manner and to evaluate the energy management strategies and regenerative braking management strategies. The test system comprises two electrical machines which can be mechanically coupled to the internal combustion engine and electrical machine of the hybrid-electric drive system; an electrical energy conversion device which makes it possible to control and reproduce the different operating modes, power distributions and architectures of the hybrid-electric drive system; a DVE (driver-vehicle-environment) real-time emulator device which controls and manages the system and includes models which emulate the dynamic behaviour of the vehicle, including the mechanical transmission and coupling systems thereof, the behaviour of the conventional braking system (ABS), the behaviour of a driver and the driving environment; an interface device which makes it possible to interconnect the DVE emulator device to the energy management, braking management and dashboard management subsystems of the hybrid-electric drive system.

Description

technical field [0001] The present invention belongs to the technical field of simulation and testing systems used in the automotive field, in particular systems (device + method) for testing and evaluating / qualifying the energy efficiency of drive systems of hybrid electric vehicles. Background technique [0002] Various hybrid vehicles exist today, which have different architectures with regard to the drive system. The drive system of a hybrid electric vehicle consists of an electric drive based on the electric machine EM and a conventional drive based on the internal combustion engine ICM (with respect to the total power of the vehicle, the power distribution of which is seen as the degree of hybridization), which can have series, parallel or series-parallel hybrid architecture. In a drive system with a series architecture, the vehicle is propelled using only the mechanical power generated by the electric motor through the electric drive system. In this architecture, th...

AI Technical Summary

Problems solved by technology

As a result, systems with specialized architectures can be tested using bedplates with expensive mechanical couplings (clutches, couplings, and planetary variable transmissions), so existing simulation systems for hybrid vehicles specifically involve individual configurations, and with regard to the existing energy management possibilities according to the constraints imposed by the aforementioned couplings

Therefore, the determination of existing simulation systems is that simulation systems are specialized for a specific vehicle or architecture, and they cannot test different architectures and energy strategies / operating modes in a smart, flexible, and dynamically reconfigurable manner

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