Assessment of an electrical coolant pump on a heavy-duty diesel engine

Abstract

Hybridization of the drive train in commercial vehicles is a key solution toward meeting the strict future requirements to reduce carbon dioxide emissions within the European Union. In order to decrease fleet consumption a large number of different hybrid systems are already available in series in the passenger car sector. Due to the cheap and powerful 48 volt hybrid components and the lower hazard potential compared to high voltage, future commercial vehicles could also benefit from the 48V technology and contribute to lower fleet fuel consumption. Therefore, a complete 48V mild hybrid system was built on the diesel engine test bench as part of a research project. This paper highlights the utilization of a powerful 48V-motor to propel the coolant pump on a diesel engine of the 13-L commercial vehicle class. Three different drive variants of the coolant pump were implemented and measured on the diesel engine test bench. MATLAB®/Simulink®-simulations were conducted to assess the possible fuel savings in three different driving cycles. This paper provides a summary and interpretation of the measurement and simulation results. The simulation studies predict a decrease of fuel consumption of up to 0.94%. Furthermore, the additional advantages of electrified coolant pumps based on 48V are discussed.

Composition, features, problems, and treatment related to cooling fluid – a review

“…Vehicles with diesel engines can lower their fuel consumption using the 48 V technology, particularly a 48 V motor, to propel the coolant pump on a 13-L diesel engine applied in the commercial vehicle class [91].…”

Multifidelity simulation of underhood thermal system for a bus engine

“…The friction losses are assumed to be a polynomial function of engine speed, where the tuning parameters are determined by solving a non-linear least equations problem [29]. The parasitic losses are estimated from the pressure rise across the pumps and fans by the equation 16, where the efficiency of pump and fan is 0.75 and 0.8 respectively [30,31].…”