AVL CVS i60 Exhaust Gas Dilution System
The AVL CVS i60 发动机排放测试系统

AVL CVS i60 Exhaust Gas Dilution System

The AVL CVS i60 is a space-saving and cost-efficient full-flow dilution system designed for engine and vehicle certification as well as R&D testing. The intuitive, interactive graphical user interface supports all essential service and diagnosis functions and issue warnings in case of pending maintenance intervals.

AVL Approach

The AVL CVS i60 is the most compact full flow dilution system on the market. With a total flow rate of up to 30m³ all system components fit into one 19" cabinet. The sophisticated gas flow system guarantees fast response times and the best reproducibility for gas analysis. The extended valve manifold with increased numbers of phases (a maximum of five) and simultaneous analyzing, purging, evacuating and filling optimizes the running of test cycles, for example, with regard to HEV/PHEV applications. The modular design with up to four main flow venturis, three bag sample venturis or alternatively with mass flow controllers supports all possible applications on chassis dyno and engine testbeds. The patented angulated inlet tube allows particulate measurement in accordance with ECE, EPA and Japanese legislations with one dilution tunnel. The operation of the CVS i60 can easily and intuitively be done via the iGEM CVS device control software.

Benefits at a Glance

• Best accuracy and reproducibility for ultra-low emission sampling in compliance with the latest legislation.
• Most compact design, reduced test cell floor space.
• Simultaneous analyzing, purging, evacuating and filling of the bags (max. 20).
• Particulate measurement of GDI and diesel vehicles via one dilution tunnel.
• Automated CFO checks and LFE calibration via iGEM CVS.
• Minimized total cost of ownership through frequency-controlled blower and alternative operation without heat exchanger.

• The exhaust gas is diluted with filtered ambient air close to the tailpipe outlet and then homogeneously mixed in the dilution tunnel for particulate measurement. During each phase of a test cycle the exhaust gas bags are filled proportionally to the main flow rate of the CVS. The integrated mass emissions are calculated using the background gas concentrations in the bag and the accumulated flow rate of the diluted exhaust.

  New and upcoming European emission legislations according to ECE-R83 (Euro 5+) require measurements of the particulate mass as well as the particle numbers in Diesel exhaust. AVL accepted that challenge and developed a patented single dilution tunnel design, which is the most space and cost-efficient solution in the emission market.

• Only one dilution tunnel is needed for GDI- and Diesel particulate sampling and particle counting according to the legislation Euro 5+/6.
• Approved and verified technical solution.
• One particulate sampler and one particle counter only.

• The GDI raw exhaust is mixed close to the engine with filtered dilution air by the RMU i60. 
  The diluted exhaust is guided into the dilution tunnel VTi273 via an angular flow inlet pipe, which is located in flow direction behind the classical diesel exhaust inlet. The design of the angulated GDI inlet pipe guarantees a homogenously mixing in the dilution tunnel. Cross interferences, depositions or alterations are prevented in the diesel as well as in the GDI gas path.