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engine

An engine and nozzle technology, applied in engine components, engine control, combustion engines, etc., can solve the problems of difficult fuel diffusion, increased smoke, uneven fuel density distribution, etc., to improve combustion stability and reduce fuel effects.

Active Publication Date: 2018-04-24
MITSUBISHI MOTORS CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

As a result, it increases the amount of smoke in the exhaust
In addition, if the pressure of the fuel is low, the injected fuel is difficult to diffuse, and the density distribution of the fuel is also prone to non-uniformity.

Method used

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Embodiment Construction

[0033] For the engine of the first embodiment of the present invention, refer to the appended Figure 1 ~ Figure 4 to illustrate. The engine 1 is employed as an engine mounted on a vehicle, particularly a vehicle capable of idling stop operation or an engine mounted on a hybrid vehicle. figure 1 The engine 1 shown is an in-line four-cylinder engine, as explained below. The engine 1 has: four cylinders #1 to #4; first nozzles Di1 to Di4 that directly inject fuel into the cylinders A1 to A4 of the respective cylinders #1 to #4; intake ports to the respective cylinders #1 to #4 B1 to B4 are second nozzles Pi1 to Pi4 that inject fuel; and a control device 2 that controls fuel injection in each cylinder #1 to #4. In this specification and the drawings, the injection of fuel from the first nozzles Di1 to Di4 may be referred to as "Di injection", and the injection of fuel from the second nozzles Pi1 to Pi4 may be referred to as "Pi injection".

[0034] The control device (Electron...

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Abstract

An engine (1) includes first nozzles (Di1 to Di4), second nozzles (Pi1 to Pi4) and a control unit (2). The first nozzles (Di1 to Di4) are arranged in cylinders (#1 to #4), and inject fuel directly into the cylinders (A1 to A4) respectively. The second nozzles (Pi1 to Pi4) are arranged in intake ports (B1 to B4) of the cylinders (#1 to #4), and inject fuel into the intake ports respectively. The control unit (2) controls fuel injection of the first nozzles (Di1 to Di4) and the second nozzles (Pi1 to Pi4). When the engine (1) is started, the control unit (2) performs initial fuel injection by one of the first and second nozzles into the cylinders having odd-number of initial ignition order, and performs initial fuel injection by the other one of the first and second nozzles into the cylinders having even-number of initial ignition order.

Description

technical field [0001] The present invention relates to an engine having two systems of fuel injection nozzles of in-cylinder direct injection and port injection, and performing fuel injection control using them separately when starting. Background technique [0002] An internal combustion engine includes a fuel injection valve for in-cylinder injection and a fuel injection valve for port injection. These two types of injection valves are used respectively according to the operating state, thereby improving fuel economy. When the internal combustion engine is started, the temperature of the internal combustion engine is low, and a so-called "cold state" may occur. Due to insufficient gasification of the fuel, the combustion state is unstable. By increasing the pressure of the fuel injected from the fuel injection valve for in-cylinder injection to a high pressure, it is expected to accelerate the vaporization of the fuel. However, when the internal combustion engine is cold...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/06F02D41/34F02M63/00
CPCF02D41/008F02D41/047F02D41/062F02D41/064F02D41/3094F02D41/345F02D2250/31F02M69/046Y02T10/40
Inventor 川边敬平石文昭村上信明
Owner MITSUBISHI MOTORS CORP