Engine and control method therefor, vehicle, and storage medium

By placing the water injector in the combustion chamber outside the pre-combustion chamber of the engine and combining it with water injection through the intake manifold, the problem of uneven water distribution in the cylinders is solved, achieving consistent engine operation and increased thermal power, reducing knocking, removing carbon deposits, and precisely adjusting operating conditions.

WO2026056577A1PCT designated stage Publication Date: 2026-03-19BYD CO LTD
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Patent Information

Application Number
PCT/CN2025/112614
Authority / Receiving Office
WO · WO
Patent Type
Applications
Current Assignee / Owner
Priority Date
2024-09-10
Filing Date
2025-08-05
Publication Date
2026-03-19

AI Technical Summary

Technical Problem

In existing engines, the nozzles of the water injectors are located inside the intake port of the intake manifold, resulting in uneven water distribution in the cylinders, affecting the consistency of engine operation, and making it impossible to quickly and accurately adjust the operating conditions.

Method used

The water injector is located outside the pre-combustion chamber and inside the combustion chamber. It adopts direct water injection into the cylinder and combines water injection through the intake manifold. Water is supplied at different pressures through the water supply assembly, and the timing and amount of water injection are precisely controlled by the electronic control unit.

Benefits of technology

It achieves uniform water distribution in each cylinder of the cylinder block, ensures consistent engine operation, releases lean combustion potential, reduces the possibility of knocking and pre-ignition, improves thermal efficiency, removes carbon deposits, and precisely adjusts operating conditions.

✦ Generated by Eureka AI based on patent content.

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Abstract

An engine and a control method therefor, a vehicle, and a storage medium. The engine comprises an engine body and a first water injector. The engine body is internally provided with a combustion chamber and a pre-combustion chamber. The combustion chamber encloses to define a combustion cavity, and the pre-combustion chamber is located in the combustion cavity. The first water injector is located outside the pre-combustion chamber and inside the combustion cavity. The pre-combustion chamber is located in a water injection direction of the first water injector, and the first water injector is configured to inject water into the pre-combustion chamber.
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Citation Information

Patent Citations

  • Engine, engine control method and device and vehicle

    CN118008603A

  • Five-valve dual-fuel internal combustion engine system provided with active pre-combustion chamber

    CN118188151A

  • Method for operating a spark-ignited reciprocating internal combustion engine and spark-ignited reciprocating internal combustion engine

    DE102017204055A1

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    DE102017204806A1

  • Diesel engine

    JP2001193465A