The new Tier 4 interim engines have, in typical fashion, fulfilled the claim made for them by DEUTZ that they can ensure outstanding engine performance and rapidly meet high ma- chine availability ratios even under the toughest external conditions. In addition to internal validation involving several dozen prototype engines in the over 130kW power range being test run for more than 100,000 hours, the new engines and technologies are being sub- jected to a tough programme of field testing. Since 2009, over 50 field trial demonstrators of the new technology generation have been running in a variety of our customers' construc- tion machines and other industrial applications. So far, they have completed 30,000 hours under the toughest operating conditions. Every month further machines are included and several thousand more hours of valuable experience gained, before DEUTZ begins series production of the TCD 6.1 and TCD 7.8 engines at the end of this year.
The field tests are conducted under the harshest climatic conditions. An experienced DEUTZ team set up the test runs in Kiruna, the northernmost town in Sweden and also one of the coldest places in northern Europe, and evaluated the performance under realistic operating conditions of large earth-moving machines equipped with the new TCD 6.1 L6 and TCD 7.8 L6 engines. Following optimisation of the pre-heating period and the fuel in- jection system, the new engines in freezing cold machines demonstrated outstanding cold start characteristics and particularly smooth engine running at temperatures between -22 and -25°C. Additional cold chamber testing in Cologne confirmed the promising results of these initial tests. The warm-up phase was optimised by modifying the pre-heating, after- heating and the injection timings at temperatures as low as -30°C.
Field testing identified significant improvements in the performance of all types of engines compared with the previous generation. In particular, engine response time to dynamic load changes was up to 50 percent shorter. When construction machines were tested under field conditions, this led to considerably greater machine productivity. Field testing also con- firmed fuel consumption reductions of up to 5 percent under real field conditions.
Your contact for this DEUTZ AG press release is:
Frank Wesolowski
Tel.: +49 (0)221 822 5553
Fax: +49 (0)221 822 155 553
Email: wesolowski.f@deutz.com
