JPS6220779A - Suction system for engine in car - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] A0 Object of the Invention (1) Industrial Application Field The present invention provides an air cleaner connected to the intake pipe of an engine mounted on a vehicle body, which is disposed above the engine and located in front of the vehicle body. The present invention relates to an intake system for an engine in a vehicle having a front fender that covers the upper surface of a front wheel.

(2) Prior Art Generally speaking, vehicles that are capable of traveling on rough terrain, wetlands, snowy areas, etc. are sometimes driven with most of their running wheels submerged in water. For this reason, in such vehicles, the air intake of the intake system of the driving engine mounted on the vehicle body must be located at a higher position than the running wheels. It is already known that the air intake port of the engine intake system is provided directly below (Japanese Patent Application Laid-open No. 1983
(Refer to Publication No.-421).

(3) Problems to be Solved by the Invention However, particulate matter such as droplets, mud, dust, snow, etc. that are scattered when the vehicle is running is sucked into the intake system along with the intake air, and the air cleaner in the intake system is damaged. Early clogging and fouling of the element may occur, increasing intake resistance.
Another problem is that the frequency of replacing and cleaning the cleaner element increases.

The present invention has been made in view of the above-mentioned circumstances, and an object of the present invention is to provide an intake system for an engine in a vehicle that can solve the above-mentioned problems by reducing as much as possible the intake of particulate matter into the intake air. This is the purpose.

(2) Function The wind flowing over the front fender, which contains particulate matter such as droplets, mud, dust, and snow, does not flow directly into the air intake passage, but flows around the air intake passage. The particulate matter is guided by the eaves at the upper edge of the air intake and blown backward,
Air that is substantially free of particulate matter flows into the air intake passage.

(3) Examples An embodiment of the present invention will be described below with reference to the drawings.

A power unit P including an engine E is mounted in the center of a vehicle body B of the four-wheel drive saddle type vehicle, and a pair of steerable front wheels Wf are mounted on the left and right sides of the front portion of the vehicle body B.

If, and a pair of rear wheels Wr on the left and right of the rear.

Wr are respectively suspended, and their front and rear wheels Wf.

F f , F r , and W r are each driven by a drive system connected to the output end of the power unit P.

Further, the front and rear wheels Wf, Wf, Wr, and Wr have wide extremely low pressure tires.

At the front of the vehicle body B, the pair of front wheels 1F'f, M'
Left and right front fenders 1, 1 are provided to cover f.

As shown in FIG. 3, each front fender 1 consists of a substantially horizontal front half 1f and a rear half 1r that slopes downward at a steep slope. A bonnet 2 forming the front upper surface of the vehicle body B is disposed between the left and right front fenders 1, 1.

An intake pipe 5 is connected to the intake port 3 of the engine E via a capretor 4. This intake pipe 5 is curved in a U-shape when viewed from the side and extends forward of the vehicle body B, and an air cleaner 6 is connected to the end of the intake pipe 5. This air cleaner 6 is disposed above and across the engine E, and is covered by the front part of the vehicle body B together with the intake pipe 5.

Left and right air intake passages 7.7 are provided on the pair of left and right front fenders 1, 1, respectively.

Each air intake passage T is located on the front fender 1.

Extends posteriorly and has a channel-shaped cross section;
Its front end face is closed, and a rectangular air intake port 8 is opened at its rear end face. This air intake port 8 has an eave 9 extending rearwardly extending over its upper edge and both side edges, and the end surface of this eave 9 is connected to the outer surface of the rear half 1r of the front fender 1, as shown in FIG. The road surface is -.

Mutually opposing inner walls 71 of the left and right air intake passages 7, 7
．． Air suction ports 10.10 are opened in each of 72, and these air suction ports 10.10 are connected to the connecting pipe 11.1.
1 and the air cleaner 60 inlet 1 via the conduit 12
3.13 is connected.

Next, the operation of the embodiment of the invention will be explained.

When the vehicle is running, the wind flowing on the upper surfaces of the left and right front fenders 1.1 flows backward along the upper surfaces of the air intake passages 7, 7 as shown by the arrows in FIG. Since the front end surface of the intake passage 7 is closed, the running wind does not directly enter the air intake passage 7.

The intake negative pressure generated by the operation of the engine E is passed through the conduit 12 and the connecting pipe 11.11 to the left and right air intake passages 7.
Therefore, when the outside air is drawn into the air intake passage 7.7 through the air intake port 8.8, there is a relatively small amount of air flowing over the left and right front fenders 1, 1. A large amount of particulate matter such as droplets, mud, dust, and snow is mixed in, but when the traveling wind flows over the upper surface of each air intake passage 7, the particulate matter is guided by the eaves 9 and blown backward. It is difficult to enter the air intake passage T, and only air bypasses the eaves 9 and is sucked into the passage T through the air intake port 8. Coupled with the fact that the running wind does not directly enter the air intake passage 7 through the front end thereof, air from which the particulate matter has been separated is sucked into the air intake passage T.

The particulate matter remaining on the eaves 9 can be removed by being cured to the rear surface of the steeply inclined rear part 1r of the front fender 1.

Effects of the C0 Invention As is clear from the above embodiments, according to the present invention,
An air intake passage that communicates with the air cleaner inlet is provided on the top surface of the front fender, an air intake is opened at the rear end of this air intake passage, and an eave is provided on the upper edge of this air intake, so that the air The air flowing over the front fender does not directly flow into the intake passage, and the eaves at the upper edge of the air intake are designed to actively remove flying objects such as droplets, mud, dust, and snow that get mixed into the air while driving. The particulate matter is separated into air intake.
10, the air containing almost no particulate matter can be introduced into the air cleaner, and the air cleaner is less likely to be contaminated or clogged by the particulate matter. The frequency of cleaning and replacement can be reduced.

Furthermore, it is possible to reduce intake resistance and contribute to improving the output performance of the engine.

[Brief explanation of drawings]

The drawings show one embodiment of the device of the present invention; FIG. 1 is a side view of a four-wheel saddle type vehicle equipped with the device of the present invention, FIG. 2 is a front plan view thereof, and FIG. FIG. 4 is a vertical sectional view taken along the line IV-IV in FIG. 2. FIG. B...Vehicle body, E...Engine, Wf...Front wheel 1
°...Front fender, 5...Intake pipe, 6...
Air cleaner, 7... Air intake passage, 8... Air intake, 9... Eaves, 13... Entrance Figure 2 Figure 3 Figure 4 Procedure (Hoshosho 1 issue) 1985 September 10th 1, Indication of the case Japanese Patent Application No. 60-159464 2, Name of the invention Intake device for engine in a vehicle 3, Person making the amendment, Relationship of the case Patent applicant name (532) Honda Motor Co., Ltd. 4, Agent Address: 4-4-5-5 Shinbashi, Minato-ku, Tokyo, Subject of Amendment Contents of Amendment 1, Page 3, Line 14 of the Specification, Add the following on a new line after "Rumono Desu" do. According to the present invention, an air cleaner connected to an intake pipe of an engine mounted on a vehicle body is disposed above the engine, and is located at the front of the vehicle body. In a vehicle, an air intake passage communicating with the inlet of the air cleaner is provided on the upper surface of the front fender, and an air intake is provided on the rear end surface of the air intake passage. and provide an eaves around the upper edge of this air intake.''

Claims (1)

[Claims] An air cleaner connected to an intake pipe of an engine mounted on the vehicle body is disposed above the engine, and a front fender is provided at the front of the vehicle body to cover the upper surface of the front wheels.
In the vehicle, an air intake passage communicating with the inlet of the air cleaner is provided on the upper surface of the front fender, an air intake is opened at the rear end of the air intake passage, and an eaves is provided at the upper edge of the air intake. An intake device for an engine in a vehicle, characterized by being provided with.