CN1073027C

CN1073027C - Stack intake duct

Info

Publication number: CN1073027C
Application number: CN98116842A
Authority: CN
Inventors: 佐久间丰
Original assignee: Hino Jidosha Kogyo KK
Current assignee: Hino Motors Ltd
Priority date: 1997-10-07
Filing date: 1998-07-30
Publication date: 2001-10-17
Anticipated expiration: 2018-07-30
Also published as: JPH11105553A; CN1213621A

Abstract

The invention is directed to prevent water from getting into an air cleaner. A stack intake duct is divided into two parts, the upper part and the lower part, at the lower position of the air duct inlet. The lower part is erected in an air cleaner to supply a car engine with air, while the upper part is provided with a air inlet. The upper part is fitted in the upper end of the lower part, so as to make up a slit between an outer circumference of the lower part and an inner circumference of the upper part, discharging a water drop run down after once sticking to an inner circumference of the upper part, to the outside of the lower part.

Description

Stack intake duct

The present invention relates to a kind of stack intake duct that from the air that is supplied to driving engine, separates water outlet.

The general needed air of driving machine engine of motor vehicles feeds by air purifier from free air diffuser.An example of this class free air diffuser as shown in Figure 4.

Free air diffuser shown in Figure 4 is a stack intake duct 4 of making chimney-like, and this free air diffuser 4 is holded up on the air purifier 3 that is located at operator's compartment 1 back shield 2 back lower places such as truck usually, is fixed by the back shield 2 of operator's compartment 1.

Stack intake duct 4, as shown in Figure 5 and Figure 6, its upper end is an osed top, is provided with endoporus 6 and leads to the upper end by air purifier 3.Near passage 4 upper ends side is provided with air intake 7, and the atmosphere of passage 4 outsides 5 and passage 4 interior holes 6 are communicated with.

Louver 9 is equipped with at air intake 7 places, a plurality of blades of louver, and the atmospheric side from outside 5 tilts upward towards the endoporus 6 relative horizontal surfaces of passage 4, roughly is equally spaced on the upper-lower position with preset space length 10 respectively and disposes.

Like this, because the blocking of louver 9, thereby the air intake 7 by passage 4 just can prevent the endoporus 6 of direct access passages 4 such as the rainwater that falls from top cloudburst or mist 8 when the driving engine aspirated air when rainy.

Yet rainwater or mist 8 etc. do not separate by louver 9, so will be inhaled in the endoporus 6 of passage 4 with air.Rainwater that is inhaled into or mist etc., the inner wall surface that is attached to passage 4 are toward dirty, and are perhaps past dirty with air, enter the driving engine from air purifier 3, and the anxiety of the driving engine of causing imbalance is arranged.

In view of this, be inhaled into the stack intake duct that the free air diffuser endoporus can prevent really that also it is inhaled in the driving engine, engine reliability is improved even the purpose of this invention is to provide a kind of rainwater or mist etc.

Stack intake duct of the present invention is made up of two parts up and down, the passage lower part is located to motor vehicle engine and supplies on the air purifier of air, passage top has air intake, passage top is set to the upper end of passage lower part, thereby between the internal perisporium on the periphery wall of passage lower part and passage top, form slit, will be attached on the internal perisporium of passage top by means of this slit and be discharged to outside, passage lower part toward dirty water droplet.

When raining, be inhaled into the rainwater of access bore or mist etc. and become to be attached to water droplet on the inwall of passage top, the weight of mat self, can not be inhaled into the driving engine from air purifier to dirty along inwall, but is discharged to the free air diffuser outside from slit.

Like this,, also can prevent from really to be inhaled in the driving engine even rainwater or mist etc. are inhaled in the access bore, thus the reliability of raising driving engine.

Below in conjunction with the description of drawings embodiments of the invention.

Fig. 1 is the transparent view of an embodiment of stack intake duct of the present invention.

Fig. 2 is the cutaway view of the II-II line intercepting along Fig. 1.

Fig. 3 is the cutaway view of the III-III line intercepting along Fig. 1.

Fig. 4 is the lateral plan of an example of general free air diffuser when being provided on the large truck.

Fig. 5 is the enlarged drawing of the V part of Fig. 4.

Fig. 6 is the cross sectional drawing of the VI-VI line intercepting along Fig. 5.

The meaning of each label is as follows in the accompanying drawing:

3 air purifiers

5 outsides

7 air intakes

11 free air diffuser tops

12 free air diffuser lower parts

19 slits

21 water droplets

Fig. 1 to Fig. 3 is a stack intake duct, wherein represents same parts with the part of the same label of Fig. 4 to Fig. 6.

Here, stack intake duct 4 is that the position of general stack intake duct 4 below air intake 7 is divided into two parts, is made of passage lower part 12 and passage top 11.Hold up from air purifier 3 passage lower part 12, extends upward, and extension is holded up in passage top 11 above passage lower part 12.

Passage lower part 12 and passage top 11, the same with general stack intake duct 4, have endoporus 6 and be communicated with air purifier 3.The upper end of passage lower part 12 as depicted in figs. 1 and 2, and is outstanding by horizontal component 13, forms the insertion portion 14 less than the endoporus 6 of the endoporus 6 on passage top 11 and passage lower part 12.Insertion portion 14 is provided with endoporus 16, the endoporus 6 from the upper port 15 1 that is located at insertion portion 14 upper surfaces through to passage lower part 12.

In addition, the endoporus 6 on passage top 11, the same with general stack intake duct 4, from the upper end one on passage top 11 through to lower port 17.Near 11 upper ends, passage top lateral parts is provided with the air intake 7 of tool louver 9.

The insertion portion 14 of 12 upper ends, passage lower part injects the lower port 17 on the passage top 11 of tool air intake 7, thereby forms 1～10 millimeter slit 19 between the internal perisporium 18 of the periphery wall of passage lower part 12 insertion portions 14 and passage top 11 lower port 17.

In addition, passage top 11, as shown in Figure 3, its lower end is connected with the insertion portion 14 of passage lower part 12 by attaching partss such as rivet 20, thereby is fixed on the passage lower part 12.

The following describes the effect of the foregoing description.

When raining, air intake 7 by stack intake duct 4 is when the driving engine aspirated air, become to be attached to the water droplet 21 on the inwall 18 of free air diffuser 11 with the rainwater of air access passage 4 endoporus 6 or mist 8 etc., the weight of mat self is past dirty along inwall 18, be not inhaled into the driving engine from air purifier 3, but from the outside 5 of slit 19 escape route lower parts 12.

Like this,, can prevent really that also it is inhaled in the driving engine, thereby improve the reliability of driving engine even rainwater or mist 8 etc. are inhaled into the endoporus 6 of passage 4.

In addition, the present invention is not limited to above-mentioned example, as long as be formed with the slit that allows rainwater flow out at the chimeric place of passage top and passage lower part, how to make amendment can.

In sum, even rainwater or mist etc. are inhaled into the endoporus of stack intake duct of the present invention, because can be from outside, slit escape route lower part, thereby can not enter in the driving engine from air purifier, thereby can prevent really that driving engine from sucking rainwater or mist etc., reaches the excellent results that improves engine reliability.

Claims

1. stack intake duct, it is characterized in that, it is made up of two parts up and down, the passage lower part is erected to the driving engine of power actuated vehicle and supplies on the air purifier of air, passage has air intake on the top, described passage top is set to the upper end of described passage lower part, thereby between the internal perisporium on the periphery wall of described passage lower part and described passage top, form slit, will be attached on the internal perisporium of described passage top by described slit and discharge outside, described passage lower part toward dirty water droplet.