The HyBoost project (earlier post), a two-year collaborative research program led by Ricardo in partnership with Controlled Power Technologies, the European Advanced Lead Acid Battery Consortium, Ford, Imperial College London, and Valeo, aims to demonstrate a very cost-effective, ultra-efficient gasoline engine in a C-segment passenger car.
The vehicle is to offer the performance of a 2.0 liter model but with a real-world 30-40% reduction in CO2 emissions to below 100 g/km. This is to be achieved through the synergistic application of an extremely downsized gasoline engine coupled with electrified boosting and exhaust gas energy recovery; micro-hybrid functionality with stop/start, torque assist and regenerative braking; and a novel energy storage technology.
The technologies to be incorporated in the HyBoost demonstrator vehicle will be restricted to innovations which are capable of practical production implementation in the near term; they must be constructed with readily available and affordable materials, and have the high scalability required by the automotive sector.
The £3 million (US$4.9 million) HyBoost project is supported by a £1.5 million investment from the UK Government-backed Technology Strategy Board with balancing resources provided by the project partners.
HyBoost aims to demonstrate the very significant benefits that can be achieved using an intelligent combination of innovative technologies to deliver low carbon transport solutions. The stated targets of this research would enable a consumer-attractive “average car” to be offered with CO2 emissions well below the mandated future target set for the European fleet average without compromising vehicle performance.—Neville Jackson, Ricardo group technology director
Controlled Power Technologies (CPT) is responsible on the project for the electric supercharger and exhaust gas energy recovery system. (Earlier post.) Valeo will support the project with innovative solutions on the air intake loop including a cooled EGR system, an integrated watercooled charge air cooler and a low-voltage recovery system based on Valeo’s BSG (belt-starter-generator) StARS (stop/start system) machine with associated electrical energy management electronics.
Recent research by the Advanced Lead Acid Battery Consortium members into the use of valve-regulated lead-acid batteries in hybrid vehicle applications, has resulted in the development of batteries with a capacitive function in the negative plate. A program of work is being developed to ascertain whether the use of these batteries can lower the cost of the Valeo StARs + X approach—a supercapacitor-based extension to StARS (StARS + X) to support regenerative braking and thus enable a greater reduction in fuel consumption than is possible with the stop-start system alone. (Earlier post.)