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Fuel supply apparatus for internal combustion engine

A fuel supply and internal combustion engine technology, applied in fuel injection control, mechanical equipment, engine control, etc., can solve the problem of small fuel volume, difficulty in forming a uniform air-fuel mixture, and the inability to set a high ratio fuel injection of the second fuel injection valve, etc. question

Inactive Publication Date: 2008-12-10
TOYOTA JIDOSHA KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In addition, because the amount of fuel necessary to run the engine is also relatively small, it is not possible to set a high ratio fuel injection of the second fuel injection valve, resulting in difficulty in forming a satisfactorily uniform air-fuel mixture

Method used

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  • Fuel supply apparatus for internal combustion engine
  • Fuel supply apparatus for internal combustion engine
  • Fuel supply apparatus for internal combustion engine

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Embodiment Construction

[0015] figure 1 is a schematic diagram showing an internal combustion engine to which a fuel supply device according to the present invention is attached. exist figure 1 Among them, the internal combustion engine is composed of the following devices: an engine main body 1; a balance box 2 shared by the cylinders; an intake manifold 3 connected between the balance box 2 and each cylinder; and an inlet pipe shared by the cylinders on the upstream side of the balance box 2 4. A throttle valve 5 is arranged immediately upstream of the balancing tank 2 in the inlet pipe 4 . There is also an exhaust duct 6 connected to each cylinder.

[0016] The engine body 1 includes an intake valve 7, an exhaust valve 8, a piston 9, a spark plug 10, a first fuel injection valve 11 for directly injecting fuel into a cylinder, and a first fuel injector arranged in each intake manifold 3. Two fuel injection valves 12.

[0017] The present internal combustion engine achieves homogeneous combusti...

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PUM

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Abstract

A fuel supply device for an internal combustion engine includes a first fuel injection valve for directly injecting fuel into a cylinder and a second fuel injection valve for injecting fuel into an intake manifold, the first fuel injection valve can be prevented from The formation of deposits in the engine allows for a satisfactorily homogeneous air-fuel mixture during homogeneous combustion at engine idling. In order to achieve this effect, during the homogeneous combustion of the engine idling, the second fuel injection valve (12) injects fuel, while the first fuel injection valve (11) injects fuel that has been pressurized by the low-pressure pump (21) and the high-pressure pump (23) Fuel without further pressure.

Description

technical field [0001] The invention relates to a fuel supply device for an internal combustion engine. Background technique [0002] It is known that an internal combustion engine comprises a first fuel injection valve and a second fuel injection valve, wherein the first fuel injection valve injects fuel directly into the cylinder for stratified combustion, and the second fuel injection valve injects fuel into the intake manifold tube for even combustion. [0003] During homogeneous combustion in such an internal combustion engine, when fuel injection from the first fuel injection valve is stopped, the temperature in the injection hole opening to the cylinder in the first fuel injection valve may rise, generating deposits in the injection hole , causing clogging of the injection holes. In order to avoid such a problem, it has been proposed that not only the second fuel injection valve but also the first fuel injection valve inject fuel during homogeneous combustion to sup...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): F02D41/30F02D41/08
Inventor 松村惠理子
Owner TOYOTA JIDOSHA KK