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Development of an Optimized CNG Passenger Car with Petrol Limp-Home System
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Abstract
PSA, Renault, Gaz de France and TNO carried out a joint research programme with the aim to develop a CNG vehicle based on a Citroën BX 19 GTI. In order to make optimal use of CNG a optimized engine concept (increased compression ratio) was adopted.
The paper describes the engine testbed work, the vehicle body modifications and the initial vehicle testing. By increasing the compression ratio from 9.3:1 to 11.5:1 the power loss of the engine when running on CNG could be limited to approx. 16%. When running on petrol a similar power loss was observed.
Emissions complied with the 91/441/EEC regulation (CO: 18.9%; HC + NOx = 53.6%).
Software developed by TNO specifically for this purpose enabled TNO the make use of only one control unit (EFI-4 of Delco Electronics Inc.) to perform engine management functions for both fuels.
A good driving range is obtained with a minimum loss of boot space.
Authors
Citation
van der Weide, J., Berendsen, J., de Roos, M., Moreau, J. et al., "Development of an Optimized CNG Passenger Car with Petrol Limp-Home System," SAE Technical Paper 940760, 1994, https://doi.org/10.4271/940760.Also In
References
- Engine management systems for lean burn and stoichiometric gaseous fuelled engines Dekker H.J. de Roos M. de Voogd A. van der Weide J. TNO Road Vehicles Research Institute Delft, the Netherlands Symposium “1991 Windsor workshop on alternative fuels, Toronto, Canada”
- Alternative fuels in the Netherlands, background, demonstrations, new developments van der Weide J. Seppen J.J. Rijkeboer R.C. Hollemans B. TNO Road Vehicles Research Institute Delft, the Netherlands Symposium “VDI/VW Aspects of alternative energies for vehicle drive, november 1992, Wolfsburg”
- Development of a dedicated CNG passenger car (Citroen BX 19 GTI) Barnstijn R.A. Berendsen J.M. de Roos M. TNO Road Vehicles Research Institute Delft, the Netherlands TNO-report 732060105
- Flexible fuel vehicles optimized on methanol, engine management and emissions van der Weide J. Dekker H.J. de Voogd A. TNO Road-Vehicles Research Institute Delft, the Netherlands Symposium on Alcohol Fuel Technology