JPH10306763A - Engine device for vehicle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To arrange an injector and fuel piping compactly and improve assemblage. SOLUTION: A cylinder head 3 is placed on a cylinder body 2. A combustion chamber 5 is formed by a recessed part 3a of the cylinder head 3 and a head part 4a of a piston 4 provided in a cylinder 2a of the cylinder body 2 so as to be reciprocated, and an injector 10 is provided to inject fuel into the combustion chamber 5. In an engine device for a vehicle of such constitution, the injector 10 is arranged in a position below an intake passage 8 of the cylinder head 3 opened to the combustion chamber 5, and an intake air control valve unit 12 connected to the intake passage 8 of the cylinder head 3 is integrally provided with an intake control valve 14 for controlling the intake air quantity and a fuel rail 15 for feeding fuel to the injector 10.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a vehicle engine device for injecting fuel into a combustion chamber.

[0002]

2. Description of the Related Art In a vehicle engine device, a cylinder head is mounted on a cylinder body, and a combustion chamber is formed by a head of a piston reciprocally provided in a cylinder of the cylinder body and a recess of the cylinder head. Some include an injector for injecting fuel into the combustion chamber.

[0003]

In such a vehicle engine device, for example, an injector is provided in a cylinder head. A fuel pipe is connected to the injector, and an intake pipe and an exhaust pipe are connected to the cylinder head. In addition, since the intake pipe is provided with an intake control valve for controlling the amount of intake air, it has been difficult to arrange the injector and the fuel pipe compactly in the cylinder head.

[0004] The present invention has been made in view of the above points, and an object of the present invention is to provide a vehicle engine device in which an injector and a fuel pipe can be arranged in a compact manner, and in which assemblability is improved.

[0005]

In order to solve the above-mentioned problems and to achieve the object, the invention according to claim 1 is characterized in that "a cylinder head is mounted on a cylinder body and reciprocatingly moved to a cylinder of the cylinder body. A combustion chamber is formed by a head of a piston provided so as to be able to be provided and a recess of the cylinder head, and in a vehicle engine device including an injector for injecting fuel into the combustion chamber, the injector is opened to the combustion chamber. An intake air control valve unit that controls the amount of intake air and a fuel rail that supplies fuel to the injectors are integrated into an intake air control valve unit that is located below the intake passage of the cylinder head and that is connected to the intake passage of the cylinder head. An engine device for a vehicle, comprising: The injector is arranged by utilizing the space below the intake passage, and the intake air control valve unit is integrally provided with the intake control valve and the fuel rail, so that the injector and the fuel pipe can be compactly arranged. it can. Also, when the intake air control valve unit is assembled to the cylinder head, the intake control valve is connected to the intake passage, and the fuel rail is connected to the injector, so that the assemblability is improved.

According to a second aspect of the present invention, a plurality of intake passages are provided in the cylinder head, and a plurality of valve passages communicating with the respective intake passages are provided in the intake air control valve unit. 2. The vehicle engine device according to claim 1, wherein the intake control valve is arranged in a part of the engine. The operation of the intake control valve disposed in a part of the plurality of valve passages changes the flow velocity of the plurality of intake passages of the cylinder head, causing swirl in the combustion chamber and increasing the combustion speed.

According to a third aspect of the present invention, there is provided an apparatus as set forth in claim 1, wherein the fuel rail is disposed below or above the intake control valve, and the fuel rail is communicated with the injector. Item 3. A vehicle engine device according to item 2. ], And the fuel rail can be arranged below or above the intake control valve according to the type of engine and the like, and the fuel pipe can be arranged compactly.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a vehicle engine device according to the present invention will be described below with reference to the drawings. 1 is a plan view of the vehicle engine device, FIG. 2 is a sectional view taken along the line II-II of FIG. 1, FIG. 3 is a side view of the cylinder head on the intake side, and FIG. 4 is a bottom view of the cylinder head.

The vehicle engine device 1 is a four-cylinder four-stroke engine, and a cylinder head 3 is mounted on a cylinder body 2. A piston 4 is provided in the cylinder 2a of the cylinder body 2 so as to be able to reciprocate, and a head 4a of the piston 4 and a recess 3a
Thus, a combustion chamber 5 is formed.

An ignition plug 6 is provided in the cylinder head 3 so as to face the combustion chamber 5. Further, a pair of intake passages 8 and exhaust passages 7 are formed in the cylinder head 3 so as to open into the combustion chambers 5 of the respective cylinders. The intake passages 8 and the exhaust passages 7 are formed by predetermined intake and exhaust valves. It is opened and closed at the right time. An exhaust pipe 9 is connected to the exhaust passage 7.

An injector 10 is disposed below the pair of intake passages 8 of each cylinder of the cylinder head 3, and the injector 10 injects fuel into the combustion chamber 5. The injector 10 is provided with a cap 11.

On the intake side of the cylinder head 3, an intake air control valve unit 12 is fastened and fixed by a fastening bolt 13. A valve passage 12a is formed in the intake air control valve unit 12 for each cylinder, and the valve passage 12a is connected to the intake passage 8 of the cylinder head 3. The intake air control valve unit 12 includes an intake control valve 1 for controlling the amount of intake air.
4 and fuel rail 15 for supplying fuel to injector 10
Are provided integrally. The intake control valve 14 is provided with a notch in a part so that the intake air is swirled in the combustion chamber 5, so that the combustion speed can be increased.

A fuel pump 17 is connected to the fuel rail 15 via a fuel pipe 16, and fuel is supplied to the fuel rail 15 via the fuel pipe 16 for driving the fuel pump 17. Fuel is supplied from the fuel rail 15 to the injector 1 of each cylinder.
0 is supplied. An intake pipe 18 is connected to the valve passage 12 a of the intake air control valve unit 12, and a surge tank 19 is connected to the intake pipe 18.

As described above, the injector 10 is disposed by utilizing the space below the intake passage 8, and the intake air control valve unit 12 is provided with the intake control valve 14 and the fuel rail 15 integrally. 10 and the fuel pipe 16 can be arranged compactly. Further, when the intake air control valve unit 12 is assembled to the cylinder head 3, the intake control valve 14 is connected to the intake passage 8, and the fuel rail 15 is connected to the injector 10, so that the assemblability is improved.

FIG. 5 is a bottom view of the cylinder head showing another embodiment of the intake air control valve unit. In this embodiment, a pair of valve passages 12a are formed in the intake air control valve unit 12, and each of the pair of valve passages 12a is formed.
a communicates with an intake passage 8 formed in the cylinder head 3. An intake control valve 14 is arranged in a part of the pair of valve passages 12a, and the operation of the intake control valve 14 changes the flow velocity of the intake passage 8 of the cylinder head 3 to generate swirl in the combustion chamber 5, thereby causing a combustion speed. Can be accelerated.

FIG. 6 is a sectional view showing still another embodiment of the intake air control valve unit, and FIG. 7 is a side view of the intake side of the cylinder head. In this embodiment, the fuel rail 15 is connected to the intake air control valve unit 12 and the intake control valve 14
It is arranged above. The communication passage 15a connected to the fuel rail 15 passes through the side of the valve passage 12a and communicates with the injector 10, and the fuel rail 15 can be disposed above the intake control valve 14 according to the type of engine and the like. In addition, the fuel pipe can be arranged compactly.

[0017]

As described above, according to the first aspect of the present invention, the injector is disposed using the space below the intake passage, and the intake control valve and the fuel rail are integrated with the intake air control valve unit. Provided, and the injector and the fuel pipe can be arranged compactly. Also,
When the intake air control valve unit is assembled to the cylinder head, the intake control valve is connected to the intake passage, and the fuel rail is connected to the injector, so that the assemblability is improved.

According to the second aspect of the present invention, the flow rate of the plurality of intake passages of the cylinder head changes due to the operation of the intake control valve disposed in a part of the plurality of valve passages, and swirl occurs in the combustion chamber, and the combustion speed Can be accelerated.

According to the third aspect of the present invention, the fuel rail can be disposed below or above the intake control valve according to the type of engine and the like, and the fuel pipe can be disposed compactly.

[Brief description of the drawings]

FIG. 1 is a plan view of a vehicle engine device.

FIG. 2 is a sectional view taken along the line II-II in FIG.

FIG. 3 is a side view of the intake side of the cylinder head.

FIG. 4 is a bottom view of the cylinder head.

FIG. 5 is a bottom view of a cylinder head showing another embodiment of the intake air control valve unit.

FIG. 6 is a sectional view showing still another embodiment of the intake air control valve unit.

FIG. 7 is a side view of the intake side of the cylinder head.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle engine apparatus 2 Cylinder body 3 Cylinder head 4 Piston 5 Combustion chamber 8 Intake passage 10 Injector 12 Intake air control valve unit 14 Intake control valve 15 Fuel rail

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification code FI F02M 61/14 310 F02M 61/14 310A

Claims (3)

[Claims] 1. A cylinder head is mounted on a cylinder body, and a combustion chamber is formed by a head of a piston reciprocally provided in a cylinder of the cylinder body and a recess of the cylinder head. In a vehicle engine device having an injector for injecting fuel, the injector is disposed at a position below an intake passage of a cylinder head opened to the combustion chamber, and an intake air control valve unit connected to the intake passage of the cylinder head is provided. And an intake control valve for controlling an intake air amount and a fuel rail for supplying fuel to the injector. 2. A plurality of intake passages are provided in the cylinder head, and a plurality of valve passages are provided in the intake air control valve unit so as to communicate with the respective intake passages. The vehicle engine device according to claim 1, further comprising a control valve. 3. The vehicle according to claim 1, wherein the fuel rail is disposed below or above the intake control valve, and the fuel rail communicates with the injector. Engine equipment.