Abstract
Since 2010 Pierburg has been involved in development, application and production of mechanical, fully variable valve actuation (VVA) systems. UpValve, UniValve und FlexValve are recognized upgrades for SI- as well as for Diesel engines. This paper reports on the first launch of a gasoline engine with the UpValve VVA System on the intake side.
After a brief introduction to the VVA system architecture and operation principle, the specific application to the target engine is presented, emphasizing the cylinder head design and constrains, the intrinsic cylinder deactivation (CDA) functionality and the control system structure. Subsequently, engine dyno results in terms of full load performance and part load efficiency are shared.
Finally, an insight into the mass production strategy is given. The production process of the UpValve rocker, including machining, assembly and testing, is explained in more detail.
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Abbreviations
- AFR:
-
Air Fuel Ratio
- BMEP:
-
Brake Mean Effective Pressure
- BSFC:
-
Brake Specific Fuel Consumption
- CAC:
-
Charge Air Cooler
- CDA:
-
Cylinder Deactivation
- COV:
-
Covariance (of NMEP)
- CR:
-
Compression Ratio
- DV:
-
Design Verification
- ECU:
-
Engine Control Unit
- EGR:
-
Exhaust Gas Recirculation
- (e)IVC:
-
(early) Intake Valve Closing
- EOL:
-
End of Line (testing)
- EVC:
-
Exhaust Valve Closing
- GPF:
-
Gasoline Particle Filter
- HLA:
-
Hydraulic Lash Adjuster
- GDI:
-
Gasoline Direct Injection
- MAP:
-
Manifold Absolute Pressure
- MIM:
-
Metal Injection Moulding
- n/a:
-
natural aspirated (engine)
- PMEP:
-
Pumping Mean Eff. Pressure
- PV:
-
Production Verification
- RFF:
-
Roller Finger Follower
- SI:
-
Spark Ignited (engine)
- T/C:
-
Turbo Charger
- type_2:
-
RFF type valve train
- VCR:
-
Variable Compression Ratio
- VCU:
-
Valve Control Unit
- VNT:
-
Variable Nozzle Turbine
- VVA:
-
Variable Valve Actuation
- VVT:
-
Variable Valve Timing
References
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© 2020 Springer Fachmedien Wiesbaden GmbH, ein Teil von Springer Nature
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Moormann, S. et al. (2020). First Launch of 2.0l I4 Engine with UpValve VVA System. In: Liebl, J. (eds) Experten-Forum Powertrain: Ladungswechsel und Emissionierung 2019. Proceedings. Springer Vieweg, Wiesbaden. https://doi.org/10.1007/978-3-658-28709-2_8
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DOI: https://doi.org/10.1007/978-3-658-28709-2_8
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