Guy Morris

Optimal Boost Control for an Electrical Supercharging Application

Electrical on demand supercharging provides an internal combustion engine with the facility to increase its volumetric efficiency without being subject to the mechanical constraints associated with a conventional pressure charging device. This enables improvement in fuel economy through engine downsizing with the added ability to enhance torque. The Visteon Torque Enhancement System (VTES) is a fully integrated air management system, at the heart of which is an electronically controlled, electrically powered supercharger. Based on the driver demand, the supercharger responds by rotating a compressor at a speed which pressurizes the intake air to the desired level. The control system associated with an electrical boosting device (EBD) considers the engine and electrical motor torque requirements for providing the actuator with an appropriate compressor set-point. Optimal tracking of the set-point requires inclusion of physical limits of the actuator for the supercharger operation. Conditioning of the compressor speed setpoint is done such that driver’s perception remains unaffected by any such limits. Electrical supercharging provides an opportunity to address the low-end torque deficit in both naturally aspirated and turbocharged applications. The use of the electrical supercharger in series with a turbocharger aids in the reduction of turbo lag. The resultant modifications in the supercharger boost demand are made as a function of the 2-stage pressure charging requirements.

HyBoost: An Intelligently Electrified Optimised Downsized Gasoline Engine Concept

The UK Technology Strategy Board (TSB) sponsored HyBoost project was a collaborative research programme to develop an ultra efficient optimised gasoline engine concept with “Intelligent Electrification”. The basis of the concept was use of a highly downsized 1.0 L boosted engine in conjunction with relatively low cost synergistic ‘12+X’ Volt electrical management system and electrical supercharger technologies to deliver better value CO2 reduction than a full hybrid vehicle. Project targets of 99 g/km CO2 as measured over the European Drive Cycle (EDC) in a standard 2011 Ford Focus whilst maintaining the same performance and driveability attributes as a 2009 production 2.0 L version of the car were achieved, and a potential route through to <85 g/km CO2 identified. Ricardo was supported by a consortium consisting of Ford, Controlled Power Technologies, Valeo, the European Advanced Lead Acid Battery Consortium, Imperial College London and the UK TSB.

Elektrifizierung eines Downsizing- Ottomotors mit Aufladung

Intelligente Elektrifizierung kann die bisherigen Grenzen beim Downsizing von Ottomotoren verschieben. Dies zeigt der Antrieb eines Projektfahrzeugs, das im Rahmen des Hyboost-Forschungsprogramms unter der Leitung von Ricardo und in Zusammenarbeit mit Ford, Controlled Power Technologies, Valeo und anderen Unternehmen entwickelt wurde. Dabei ermoglichen unter anderem ein Kompressor mit Elektroantrieb und ein Speicher aus Doppelschichtkondensatoren eine extreme Hubraumverringerung.

Konzept für Kostengünstigen Niedrigspannung-Hybridantrieb

Ein elektrisch angetriebener Kompressor, ein riemengetriebener Starter-Generator und eine Turbine zur Ruck gewinnung der Abgasenergie: Mit diesen Techniken, deren Herzstuck jeweils ein geschalteter Reluktanzmotor ist, arbeitet ein Hybridkonzept des britischen Unter- nehmens Controlled Power Technologies (CPT). In Verbindung mit einem im Hubraum um 50 % reduzierten Verbrennungsmotor soll das Kosten-Nutzen-Verhaltnis deutlich gunstiger sein als bei klassischen Vollhybridlosungen.

Concept for low-cost low-voltage hybridisation

An electrically powered supercharger, a belt-driven starter-generator and a turbine for the recuperation of exhaust energy: these technologies, at the centre of which is a switched reluctance motor, are used in a hybrid concept developed by the British company Controlled Power Technologies (CPT). In combination with an internal combustion engine that has a 50 % reduction in swept volume, the cost-benefit ratio is claimed to be significantly better than that of conventional full hybrid solutions.

Nonlinear Thermal Modelling of an Electrical Supercharger

Abstract The model described in this paper is utilised for the estimation of component temperatures of a motor operating in an electrical boost device (EBD) within an automotive powertrain environment. Due to the interacting electrical and mechanical characteristics of this device, the energy dissipated in the form of heat is modelled as a nonlinear feature. The primary purpose of this model is to provide a sensorless temperature inference mechanism whereby the overall cost of the unit can be brought down and the control of the motor can be constrained to its thermal limits.