Components for directly injecting gaseous fuel into the cylinders of a two-stroke piston internal combustion engine, and the two-stroke piston internal combustion engine.
By designing a combination of liquefied gas supply and return manifolds, liquefied gas high-pressure pump units, and heat exchangers, the structural complexity and controllability issues of gaseous fuel direct injection systems in large two-stroke piston internal combustion engines were solved, achieving efficient and safe gaseous fuel injection, which is suitable for multi-cylinder piston internal combustion engines.
CN117203417BActive Publication Date: 2026-06-30WARTSILA SERVICES SWITZERLAND LTD
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- WARTSILA SERVICES SWITZERLAND LTD
- Filing Date
- 2021-01-27
- Publication Date
- 2026-06-30
Smart Images

Figure CN117203417B_ABST
Abstract
The present invention relates to an assembly (50) for directly injecting gaseous fuel into a cylinder (100) of a two-stroke piston internal combustion engine (1), the assembly (50) comprising: a housing (102) enclosing: - a liquefied petroleum gas (LPG) supply manifold (120, 120'); - an LPG return manifold (140, 140'); - an LPG high-pressure pump unit (160) connected to the LPG supply manifold (120, 120') and the LPG return manifold (140, 140'), and the assembly further comprising: - the LPG high-pressure pump unit (160) The high-pressure liquefied gas outlet (180) in the pressure pump unit (160); and a heat exchanger unit (200) configured to evaporate the liquefied gas and heat the gaseous gas, the heat exchanger unit (200) having an liquefied gas inlet (201) and a gaseous gas outlet (202), the liquefied gas inlet (201) being connected to the high-pressure outlet (180) of the liquefied gas high-pressure pump unit (160) by means of a fuel supply line (320); and at least one gaseous gas fuel injector (220) connected to the heat exchanger unit.
Need to check novelty before this filing date? Find Prior Art