JPH0710425U - Exhaust manifold cover - Google Patents

Abstract

(57) [Summary] [Purpose] An object of the present invention is to provide an exhaust manifold cover capable of favorably cooling a sensor mounted on the exhaust manifold. [Composition] An exhaust manifold 3 to which a sensor 6 is attached is disposed on the downstream side of the wind flowing from the front grille opening 2, and an exhaust manifold cover 4 covering the exhaust manifold 3 winds toward the sensor 6 side. Recessed guiding pieces 4a, 4b for guiding W are formed.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to an improvement of an exhaust manifold cover.

[0002]

[Prior art and its problems]

Conventionally, as shown in, for example, FIG. 1, in a vehicle equipped with a horizontal engine, a front grille opening 2 is formed in an upper portion of a front bumper 1. The front grille opening 2 is used when the vehicle is running. Air flows into the engine side, and an exhaust manifold 3 is provided at the exhaust port of the engine. On the base side of the exhaust manifold 3, O ₂ and A / F sensors 6 are installed. The exhaust manifold 3 is attached via an attachment boss 5, and an exhaust manifold cover 4 is attached to the front portion of the exhaust manifold 3 in a cover-like shape. Conventionally, the exhaust manifold cover 4 is arranged as shown in the schematic view of FIG. 4, and the wind W flowing into the engine room through the front grille opening 2 is blocked by the exhaust manifold cover 4 and the sensor There is a problem that only a small amount of wind hits the mounting boss 5 side of 6 and the sensor 6 exceeds the allowable temperature. In order to solve such a problem, the exhaust manifold cover 4 should have a small diameter. Then, a large amount of wind may hit the mounting boss 5 of the sensor 6, but if the exhaust manifold cover 4 has a small diameter in this way, the radiant heat from the exhaust manifold 3 hits the sensor 6 and the temperature of the sensor 6 does not rise so much. Radiant heat from the exhaust manifold 3 does not go down, but conversely the radiator fan around There is a problem with the point that the problem that the components will melt occurs.

[0003]

[Means for Solving the Problems]

 The present invention has been devised in view of the above-mentioned conventional problems, and in addition to covering the exhaust manifold well to block the radiant heat from the exhaust manifold, it is possible to supply a large amount of air to the mounting part of the sensor. The purpose of this is not to provide an exhaust manifold cover, and the main point is that an exhaust manifold with a sensor is installed on the downstream side of the wind that flows in from the front grille opening, etc., and the upstream side of the exhaust manifold is The exhaust manifold cover to be covered is formed with a recessed guide piece for guiding the wind toward the sensor.

[0004]

[Action]

 The exhaust manifold cover has a recessed guide piece, and a large amount of air flowing from the front grille opening and other parts through this guide piece is directly supplied to the sensor's mounting part, and the sensor and its mounting part Cools well.

[0005]

【Example】

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIG. 1, an exhaust manifold 3 is arranged on the downstream side of the wind W passing through the front grille opening 2, and the exhaust manifold 3 is provided with an O ₂ , A / F sensor, etc. via a mounting boss 5. A sensor 6 is attached, and the upstream side of the exhaust manifold 3 is covered with an exhaust manifold cover 4.

This exhaust manifold cover 4 is provided with the exhaust manifold cover 4 as shown in a schematic sectional view taken along the line AA of FIG. 1 and a schematic sectional view taken along the line BB of FIG. On the side of the sensor 6, guide pieces 4b and 4a for guiding the wind W are formed so that a large amount of wind W directly hits the mounting boss 5 of the sensor 6, and the exhaust manifold cover 4 has a lower portion on the lower side thereof. A lower guide piece 4b and an upper guide piece 4a are formed continuously above the lower guide piece 4b so that the wind W flowing from the front grille opening 2 side can be attached to the sensor 6 by the lower guide piece 4b. The mounting boss 5 can be directly cooled by being guided to the boss 5 side, and the wind W that wraps around and flows downward from above the exhaust manifold cover 4 is guided to the upper guide piece 4a. It is possible to cool all around the mounting boss 5 with a large amount of air W by collecting all the air W flowing to the mounting boss 5 and the sensor 6 side and flowing from the front and above to the mounting boss 5 and the sensor 6 side.

Since the guide pieces 4a and 4b having such a shape surround the base of the exhaust manifold 3, the radiant heat from the exhaust manifold 3 can be better prevented from being transmitted to peripheral functional parts. It also has the secondary effect of being able to

[0008]

[Effect of device]

 According to the present invention, an exhaust manifold with a sensor is arranged on the downstream side of the wind flowing from the front grille opening, and the exhaust manifold cover covering the upstream side of the exhaust manifold has Since the recessed guide piece that guides the wind is formed, the wind that flows into the exhaust manifold side from the front grille opening is guided to the guide piece of the exhaust manifold cover, and a large amount is attached to the sensor mounting part. The sensor mounting part has the effect of being satisfactorily cooled.

[Brief description of drawings]

FIG. 1 is a schematic perspective view showing the arrangement of an exhaust manifold cover of an automobile.

FIG. 2 is a schematic cross-sectional configuration diagram taken along the line BB of FIG.

FIG. 3 is a schematic cross-sectional configuration diagram taken along the line AA of FIG.

FIG. 4 is a schematic configuration diagram showing a positional relationship between a conventional exhaust manifold cover and a sensor.

[Explanation of symbols]

 2 Front grille opening 3 Exhaust manifold 4 Exhaust manifold cover 4a Upper guide piece 4b Lower guide piece 5 Mounting boss 6 Sensor W Wind

Claims (1)

[Scope of utility model registration request] 1. An exhaust manifold to which a sensor is attached is disposed on the downstream side of the wind flowing from the front grille opening or the like, and an exhaust manifold cover for covering the upstream side of the exhaust manifold is provided to the sensor side. An exhaust manifold cover, characterized in that a hollow guide piece for guiding the wind is formed.