Concept Engine Diesel Hybrid 
Green Car Congress
OCTOBER 31, 2009
The wave disc engine, a new implementation of wave rotor technology, was earlier developed by the Michigan State group in collaboration with researchers from the Warsaw Institute of Technology. The WDG also can reduce carbon dioxide emissions by as much as 95 percent in comparison to modern internal combustion vehicle engines.
Green Car Congress
MAY 23, 2009
Schematic of downsized and supercharged four-stroke hybrid pneumatic spark injection engine. The injection of the additional air during transients can overcome the poor driveability usually associated with heavily downsized and supercharged engines, the team notes. The engine has two intake and two exhaust valves per cylinder.
Green Car Congress
OCTOBER 18, 2012
Isuzu D201 35 hp diesel engine (left) and the LiquidPiston 40 hp X2 Prototype (right). HEHC is an improved thermodynamic cycle optimized for fuel efficiency that combines features of four existing cycles: High air compression ratio (Diesel). HEHC thermodynamic advantages relative to the diesel and the Otto cycles.
Green Car Congress
DECEMBER 30, 2015
Researchers at the Dalian University of Technology have proposed a novel method to control premixed charge compression ignition (PCCI) phasing in internal combustion engines in all load operations. The utilization of compressed air power on engine cool starts and low-load conditions could significantly reduce the overall emissions. …
Green Car Congress
MAY 9, 2013
Heat hybrid. A cryogenic engine such as the Dearman engine could also be used as a heat hybrid in combination with an internal combustion engine or hydrogen fuel cell to convert waste heat into additional shaft power at high levels of efficiency, reducing both fuel consumption and emissions.
Green Car Congress
SEPTEMBER 27, 2017
At NACV 2017, Bosch is also showcasing several future-focused powertrain concepts engineered to save fuel and money while extending the lives of fleets. Whether a traditional internal combustion engine, hybrid-electric or electric vehicle, thermal management has emerged as a key topic for managing vehicle efficiency.
Green Car Congress
NOVEMBER 12, 2018
Since internal combustion engines will remain the primary mode of choice for mobility in the foreseeable future, both alternative (renewable) fuels and high-performance combustion concepts/ engines using fuels adapted for that purpose will be preferred for reducing the combustion impact on climate change.
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