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Downsized 4.0 TFSI for Audi S8 cuts fuel consumption 23% compared to predecessor; cylinder deactivation and start-stop

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Audi’s principle of downsizing: “ Forced induction replaces displacement ” One twin-scroll turbocharger per cylinder bank compresses the fresh air. The thermal management system uses a ball valve to disconnect the water pump during the engine warm-up phase. It works with both of the available sound systems.

Audi 199
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Pierburg GmbH electric compressor for turbos

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This component allows pressure to be increased regardless of the exhaust-gas energy availability. The electric compressor fits in well and without any constraints with the proven strategy of downsizing, the company said. The motor and the electronic components are cooled by a water jacket connected to the engine cooling system.

Exhaust 150
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MECA report assesses technology feasibility for heavy-duty diesel trucks to meet lower NOx standards by 2024

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Technologies such as cylinder deactivation (CDA), high efficiency variable geometry turbochargers with exhaust gas by-pass, and start-stop systems are only some of the commercially available fuel saving technologies that can be implemented by 2024. The cost of controlling NO x to 0.05 g/bhp-hr in 2024 and to 0.02 Credit: MECA.

Standards 191
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Peugeot Introducing Urban Hybrid Concept Car

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liter THP 81 kW (110 bhp), 195 N·m (144 lb-ft) gasoline engine is one of the future family of three-cylinder engines currently under development as part of PSA Group’s engine downsizing strategy. This allows the driver to scroll through functions and select available settings with a simple movement of the hand.

Concept 199
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Renault 2010 Environment Workshop, Part 1: Combustion Engine Technology and Product Plans

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Renault’s ongoing downsizing strategy is aimed at reducing the cubic capacity of its engines in order to bring down fuel consumption and CO 2 emissions, without detracting from performance. It is available with several power outputs (currently from 65 to 110hp) and powers numerous Renault (from Twingo to Laguna) and Dacia models.

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MECA report finds additional NOx emission reductions from new heavy-duty trucks achievable and cost-effective

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This has resulted in higher catalyst loading per volume of substrate and led to downsizing of systems from those available in 2010. New substrates are designed with thinner walls or higher porosity, which allows the coating of better catalysts without sacrificing durability.

Emissions 291
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Audis A1 to Launch With Four Engine Options; Energy Recuperation and Stop-Start Standard

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This downsizing concept coupled with energy recuperation and stop-start technologies from the Audi modular efficiency platform give them fuel consumption ranging from 3.8 The newly developed four-cylinder exemplifies the Audi’s downsizing strategy of substituting turbocharging for volume. liters per 100 km (43.6

Audi 186