JPH10231760A - Intake structure of engine - Google Patents

Abstract

PROBLEM TO BE SOLVED: To eliminate a need for a vacuum tank of exclusive use so as to save the space by partitioning a sealed space from an intake manifold and a collector, and using the space as a vacuum tank part, in a device for operating an actuator for controlling variable intake using intake negative pressure. SOLUTION: A recessed part 2b is beforehand formed inside a flange part 2a of an end part of an intake manifold 2 connected to a collector 10 for connecting to each cylinder of an engine side, and a recessed part 10b is formed opposing to the inside of the flange part 10a of the collector 10. When both flange parts 2a, 10a are joined with each other and are assembled, a sealed space is partitioned between the recessed parts 2b, 10b, and is used as a vacuum tank part 5A for receiving negative pressure. Pipe passages 11, 12 are connected to the space, the pipe passage 11 is connected to a variable intake control actuator through a one way valve 4, and the opening of an intake control valve is controlled by operating the actuator by intake negative pressure.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an intake structure for an engine.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG.
An intake manifold 2 is connected to the engine 1,
An air cleaner 3 is provided on the upstream side, and a one-way valve 4, a vacuum tank 5, a variable intake control solenoid is provided in an intake path for performing variable intake control and the like using negative pressure generated in the intake manifold 2. The vacuum tank 5 is provided with a valve 6, a variable intake control actuator 7, an AAC valve 8, and the like. The vacuum tank 5 operates the actuators 7 and the like in a state where the engine load is high, that is, in a region where the intake manifold negative pressure is low. It is provided to store pressure. The vacuum tank 5 is formed separately from metal or resin in a tank shape. However, it is difficult to attach such a vacuum tank 5 to an engine in terms of space. And other problems.

[0003]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned conventional problems, and can eliminate a separate vacuum tank, effectively use space, and simplify piping. The purpose was to provide an intake structure for the engine, and the gist of the idea was to assemble the intake manifold and the collector in an engine that operates an actuator for variable intake control and the like using the intake manifold negative pressure. A space is formed, and the space is used as a vacuum tank for storing a negative pressure for operating the actuator in a region where the intake manifold negative pressure is low.

[0004]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a main part of the first embodiment. A collector 10 is connected to the above-described intake manifold 2 for connection to each cylinder on the engine side. A concave portion 2b is formed beforehand inside the flange portion 2a, and a concave portion 10b is also formed beforehand inside the flange portion 10a of the collector 10 so as to face the flange portion 2a of the intake manifold 2 and the collector 10b. Flange part 10
a, the concave portions 2b, 10b
The closed space is formed by connecting the pipes 11 and 12 to the space so that the closed space can be used as a vacuum tank section 5A capable of storing a negative pressure. Thus, the one-way valve 4 can be provided in the pipe line 11, and in a region where the intake manifold negative pressure is low to operate the variable intake control actuator 7 and the like, the negative pressure is stored in the formed vacuum tank portion 5A. Therefore, the actuator 7 and the like can be favorably operated by the stored negative pressure, and can be omitted without requiring a separate vacuum tank 5 as in the related art. A large-capacity vacuum tank portion 5A can be integrally formed in the joint portion, so that the space can be effectively used and the piping can be reduced. Umate Shorten becomes capable of constituting the intake system of the engine. Further, the vacuum tank portion 5A having a larger capacity than the conventional vacuum tank 5 can be formed, and the capacity for storing the negative pressure is increased.
The actuator 7 and the like can be operated more favorably.

Next, FIG. 2 shows a second embodiment. In this embodiment, the one-way valve 4 is incorporated in the closed vacuum tank portion 5A formed in FIG. In addition, with such a configuration, the conduit 11 can be further omitted, and a more compact configuration can be achieved. The pipe 12 can be connected to the variable intake control solenoid valve 6.

Next, FIG. 3 shows a third embodiment. In this embodiment, a vacuum tank portion 5A having a cylindrical shape having an open upper surface and a lower surface is integrally formed on the collector 10 side. A cover 13 is attached to the upper surface of 5A, and the flange 2a of the intake manifold 2 is joined to the flange 10a of the collector 10 from below so that the flange 2a and the cover 1 are joined together.
3, so that a vacuum tank portion 5A sealed by 3 is formed. By assembling the intake manifold 2 and the collector 10, a good vacuum tank portion 5A can be integrally formed.
The conventional separate vacuum tank 5 can be omitted, so that the space can be effectively used, and the piping configuration of the intake system can be shortened to make it compact.

[0007]

According to the present invention, in an engine that operates an actuator for variable intake control or the like using an intake manifold negative pressure, a sealed space is formed between the intake manifold and the collector by assembling the intake manifold and the collector. Is configured to be used as a vacuum tank unit for storing a negative pressure for operating the actuator in a region where the intake manifold negative pressure is low, thereby assembling the intake manifold and the collector to form a sealed space integrally, and The space can be used as a vacuum tank to store negative pressure, eliminating the need for a separate vacuum tank as in the past, making it possible to use space more efficiently, and reducing the size of the intake system piping to make it more compact. Have.

[Brief description of the drawings]

FIG. 1 is a main part configuration diagram of a first embodiment in which a vacuum tank is formed between an intake manifold and a collector.

FIG. 2 is a main part configuration diagram of a second embodiment.

FIG. 3 is a main part configuration diagram of a third embodiment.

FIG. 4 is a schematic configuration diagram showing a configuration of an intake system of a conventional engine.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Engine 2 Intake manifold 2a Flange part 2b concave part 4 One-way valve 5A Vacuum tank part 10 Collector 10a Flange part 10b Concave part 11, 12 Pipe line 13 Cover

Claims (1)

[Claims] In an engine that operates an actuator for variable intake control or the like using an intake manifold negative pressure, a sealed space is formed between the intake manifold and a collector by assembling the intake manifold and the collector, and the space is formed as an intake manifold. An intake structure for an engine, wherein the intake structure is configured to be used as a vacuum tank for storing a negative pressure for operating the actuator in a low negative pressure region.