Variable compression ratio (VCR) is a technology to adjust the compression ratio of an internal combustion engine while the engine is in operation. This is done to increase fuel efficiency while under varying loads.

The VC-Turbo engine uses a newly developed high-efficiency, wide-range turbocharger and electric waste gate. This allows precise control of the boost pressure with minimal turbo lag to generate powerful on-demand output.

A variable compression ratio (VCR) engine is able to operate at different compression ratios, depending on the particular vehicle perform-ance needs. The VCR engine is optimized for the full range of driving conditions, such as acceleration, speed, and load. At low power levels, the VCR engine operates at high

2023年9月1日 · In a VCR CI engine, three different test fuels are used. Nanofuel, e-diesel, and regular diesel fuel are the fuels that are used. At various load and compression ratios, the impact of bioethanol and nanoparticles on performance, emission, and cost-effectiveness is studied.

2018年12月17日 · This work reviews the technological advancements in the design of a VCR engine. VCR engines can minimize possible risks of irregular combustion while optimizing Brake specific fuel...

2020年1月16日 · The main feature of the VCR engine is to operate at different compression ratio, by changing the combustion chamber volume, depending on the vehicle performance needs. This paper takes review of all the geometric approaches and solutions used to achieve VCR with its unique features, considers the results of prior research and its corresponding ...

Variable Compression Ratio (VCR) technology allows compression to be adapted to the fuel currently in use, improving fuel consumption and reducing emissions in each case. The technology means that operators do not need to compromise on efficiency with a fixed compression point, and new engine designs can also reflect this capability.

2017年11月22日 · The present study was focused on the combustion engine with a variable compression ratio (VCR), namely the four-stroke air-cooled engine with the active combustion chamber (ACC).

2020年10月28日 · The chapter presents the application of variable compression ratio VCR technology for an internal combustion engine. The engine’s overall construction has been designed as the deep reconfiguration of liquid-cooled, heavy-duty diesel engine of type IFA 4 VD 14,5/12-1 SRW.

2019年10月1日 · Besides VVT, variable compression ratio (VCR) is another effective strategy to control ECR by directly adjusting the geometric compression ratio (GCR) of engines. The potential of the VCR strategy for controlling the combustion process and extending the operation range of LTC has been investigated recently as well.