[Computer-assisted optimal regulation of combustion engines at work sites].

This is a report about the fundamentals of computerised optimation of duration of operation and air exchange for the use of working machines and cars with internal combustion engines in workrooms. The computer programme 'EMI', which bases on the corresponding national standard TGL 33,358/01 to /03, is suitable for the dialog work with the operator. On the foundation of the ensuring compliance with the maximum working place concentration values MAKK and MAKD it is possible to optimize the contrary requirements like air exchange and duration of operation of the internal combustion engines.

[Determination and occupational health evaluation of pollutant concentrations from combustion engines in occupational environments].

For ensuring compliance with the maximum working place concentration values MAKD and MAKK for the use of internal combustion engines in workrooms, new directives for the determination of pollutant emissions, the calculation of working place concentrations, and the industrial-hygienic assessment are now available in form of the completely revised version of the national standard TGL 33,358/01 to 03 which is mandatory as from August 1st, 1988. Here, contrary to the former methodology pursuant to TGL 32,610/02, a partly additive, partly individual assessment of the pollutants is made. The inclusion of further emission sources in the industrial-hygienic assessment is envisaged.