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In major automotive markets such as Europe, USA and China, more stringent emission regulations are introduced starting from model year 2026 (e.g. EU7, EPA Tier 4, CARB LEV IV) or are in preparation (CN7). The aim is to further reduce traffic-related criteria pollutant emissions. This presents an additional challenge for the automotive industry alongside the introduction of powertrains with reduced CO2 emissions. The objective is to meet future emission limits under stricter and real-world driving conditions with reasonable additional costs, ensuring affordable future mobility, especially for cost-sensitive market segments like entry-level vehicles. BOSCH has already demonstrated significant exhaust emission reductions for diesel and gasoline vehicles with a comprehensive system approach. This paper focuses on further developed hardware and software solutions for gasoline hybrid powertrains, as well as adapted calibration for the corresponding market requirements. The functional principles of these solutions will be explained, and emission results will be demonstrated on a vehicle level. Within this paper we will focus on US specific requirements and therefore set segment specific targets for an Upper Class (UC) 2,0L TGDI 48V vehicle with SULEV20 and a large SUV 3,0L TGDI with a plug-in hybrid (P2) powertrain with SULEV30. Emission performance is assessed in the US legislative driving cycles on the roller dynamometer, including future additional testing requirements set by EPA and CARB, such as e.g. partial soak and quick drive away FTP75. The results demonstrate emission feasibility for the stringent US emission levels and even provide potential measures for further emission reduction.

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System Solutions for Fulfilling Future Exhaust Gas Emission Legislations with Gasoline Passenger Cars

  • 会议论文

  • 发表日期：

    2026年

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  • Domagoj Zovak,
  • Frank Meier,
  • Alexander Hettinger,
  • Erik Schünemann

摘要

In major automotive markets such as Europe, USA and China, more stringent emission regulations are introduced starting from model year 2026 (e.g. EU7, EPA Tier 4, CARB LEV IV) or are in preparation (CN7). The aim is to further reduce traffic-related criteria pollutant emissions. This presents an additional challenge for the automotive industry alongside the introduction of powertrains with reduced CO2 emissions. The objective is to meet future emission limits under stricter and real-world driving conditions with reasonable additional costs, ensuring affordable future mobility, especially for cost-sensitive market segments like entry-level vehicles. BOSCH has already demonstrated significant exhaust emission reductions for diesel and gasoline vehicles with a comprehensive system approach. This paper focuses on further developed hardware and software solutions for gasoline hybrid powertrains, as well as adapted calibration for the corresponding market requirements. The functional principles of these solutions will be explained, and emission results will be demonstrated on a vehicle level. Within this paper we will focus on US specific requirements and therefore set segment specific targets for an Upper Class (UC) 2,0L TGDI 48V vehicle with SULEV20 and a large SUV 3,0L TGDI with a plug-in hybrid (P2) powertrain with SULEV30. Emission performance is assessed in the US legislative driving cycles on the roller dynamometer, including future additional testing requirements set by EPA and CARB, such as e.g. partial soak and quick drive away FTP75. The results demonstrate emission feasibility for the stringent US emission levels and even provide potential measures for further emission reduction.