Ag Startup Engine at the Iowa State University Research Park has announced an initial seed investment of $50,000 in Chicago-based ClearFlame Engines – a company integrating low-carbon alternative fuels into diesel engines uses a high-temperature combustion process. ClearFlame Engines is the first company outside of Iowa to join the Ag Startup Engine Fund portfolio, which includes Performance Livestock Analytics, Nebullam, Gross-Wen Technologies, Smart Ag, FarmlandFinder, Tractor Zoom, Automed and LEAH Labs. The Ag Startup Engine plans to add two to six more agritech startups to its portfolio in the next year, the organization said in a press release.