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Last updated February 1, 2026
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Variable valve lift mechanism: BYDRecent Research Landscape

Fixed valve timing causes volumetric inefficiency and excessive fuel consumption across varying engine speeds. This mechanism dynamically modulates intake air flow to optimize thermal efficiency and power output.

What technical problems is BYD addressing in Variable valve lift mechanism?

Evaporative fuel vapor leakage

(15)evidences

Uncontrolled accumulation of fuel vapors leads to excessive tank pressure and atmospheric emissions. Managing this prevents canister saturation and structural tank failure.

Internal fluid leakage and contamination

(9)evidences

Mechanical instability and excessive noise caused by insufficient rigidity in the drive housing. Reducing parasitic vibration prevents premature component wear and timing inaccuracies.

Mechanical power transmission inefficiency

(8)evidences

Suboptimal air-fuel intake and exhaust flow across varying engine speeds. Improving gas exchange dynamics enhances power density and fuel economy.

Crankcase blow-by gas contamination

(4)evidences

Excessive oil mist and blow-by gases in the crankcase lead to intake system fouling and increased emissions. Reducing these contaminants prevents engine efficiency loss and component degradation.