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Trailer manufacturers must individually design and qualify a rear impact guard under FMVSS 223 for trailers built, sold or operated into the U.S. The Canadian Transportation Equipment Association (CTEA) found this onerous for smaller manufacturers, so requested the Centre for Transportation Technology of the National Research Council Canada (NRC/CSTT) to develop a generic rear impact guard suitable for trailers and trucks. This paper outlines the constraints, design analysis and tests conducted to verify performance of the CTEA generic rear impact guard.

Under China’s “3060” target of carbon peak and carbon neutrality, heavy commercial vehicles are a key breakthrough point to promote the automobile industry to achieve carbon peaking and carbon neutrality goals. Green methanol, as a clean alternative fuel, are an effective technical route for heavy commercial vehicles to achieve energy conservation and emission reduction. Based on a 13L methanol engine, this study fully considers the methanol combustion characteristics, the ω shape combustion system of the base engine is redesigned as a pent-roof combustion chamber. The intake port is changed from a swirl port to a high-tumble port, and the piston crown is also adjusted adaptively. At the same time, the cam profile, cooling water jacket, intake and exhaust system are redesigned, and the turbocharger is re-matched according to the physical properties of methanol. CAE tools and means are used to optimize and determine the design proposal.