Method of and an apparatus for supplying assist air into a combustion chamber direct injecting fuel injection valve
AssigneeJapan Electronic Control Co., Ltd.
InventorsKatsuyoshi Kawachi, Kazumitsu Kobayashi
Life of this patent
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Abstract
An engine has a combustion chamber and a fuel injection valve for directly injecting a fuel into the combustion chamber. An assist air supplying apparatus supplies assist air to atomize the fuel injected by the fuel injection valve. Assist air supply pressure is controlled so that a given pressure difference is secured between the assist air supply pressure and pressure in the combustion chamber. The assist air, therefore, is supplied under proper pressure for an entire period of fuel injection, to adequately micronize the injected fuel and improve combustion efficiency.
Claims8
A method of supplying assist air into a combustion chamber direct injecting fuel injection valve of an engine, comprising a step of detecting pressure in a combustion chamber of the engine, and a step of controlling assist air supply pressure according to the detected pressure, the assist air being supplied to atomize a fuel that is directly injected into the combustion chamber from the fuel injection valve.
An apparatus of supplying assist air into a combustion chamber direct injecting fuel injection valve of an engine, comprising the fuel injection valve disposed on the engine, for directly injecting a fuel into a combustion chamber of the engine, an air introduction member disposed on the fuel injection valve, for introducing assist air from an assist air supply source to micronize the injected fuel, an air pipe for connecting the air introduction member with the assist air supply source, and pressure control means for controlling assist air supply pressure according to pressure in the combustion chamber.
Dependencies are inferred from the claim text.