JPH02123273A - Intake device for internal combustion engine - Google Patents

Abstract

PURPOSE:To supply hot air on start and supply outside air afterwards by installing a cold air introducing suction pipe and a hot air introducing suction pipe into an air cleaner case and interlocking the adjusting valves for the both, in the suction device for an internal combustion engine. CONSTITUTION:Two cylindrical members 12 and 14 are installed onto one side surface of an air cleaner case 4, and a cold air introducing suction pipe 16 is fixed at the other ends of the installation member 12, and a hot air introducing suction pipe 20 is fixed at the other edge of the installation member 14. Adjusting valves 24 and 26 are installed at the opened port parts of the installation members, and the both valves are fixed onto a same turning shaft 28, holding a prescribed angle, and are turned by a spring part 34 and a shape memory alloy spring part 36. When an internal combustion engine is started in cold weather, the spring part 34 and the shape memory alloy spring part 36 operate, and the hot air valve 26 is opened, and the valve 24 for atmosphere is closed, and the hot air is supplied, and when warming proceeds, only the spring part 34 operates to cut off the hot air, and the atmosphere is supplied. Thus, the structure of the intake device can be made simple, and the dimension can be reduced.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an intake system for an internal combustion engine, and more particularly to an intake system for an internal combustion engine that integrates an air cleaner case and a temperature control device for an automobile.

[Conventional technology]

The air cleaner is attached to the air intake port of the carburetor brake and removes dust from the air sucked into the internal combustion engine. In addition, the types of air cleaners include oil bath type, filter paper type, etc., and the filter paper type has a higher cleaning effect.
Commonly used.

Furthermore, upstream of the air cleaner, a temperature control device was installed that could manually or automatically draw in warm air in order to improve driving performance in cold weather.

The air cleaner and the temperature control device are provided separately, as shown in FIGS. 5 to 7, and a cold air intake pipe 120 and a hot air intake pipe 116 are provided upstream of the temperature control device 106. There is. An adjustment valve 124 was provided inside the temperature control device 106 to adjust the intake amount of cold and hot air. This adjustment valve 124 is connected to the air cleaner 1 which will be described later.
It is driven by a sensor section 100 provided in 04.

Furthermore, the downstream side of the temperature control device 106 and the air cleaner 104
It is communicated with the upstream side through a first intake communication pipe 98. A second intake communication pipe 94 for supplying intake air to the carburetor brake 96 is provided downstream of the air cleaner 104, and an element member 92 and a sensor section 100 are provided inside. This sensor section 100 is made of bimetal that deforms due to temperature changes.

Moreover, this sensor section 100 and the temperature control device 106 are
It is connected by a negative pressure pipe 90 to drive the adjustment valve 124 in the temperature control device 106, and a negative pressure delay valve (vacuum transmitting valve, VTV) 8B is installed in the middle of the negative pressure pipe 90 to slow negative pressure fluctuations. is interposed.

Furthermore, as disclosed in Japanese Utility Model Application Publication No. 61-126365, in order to reduce the ventilation resistance and improve the silencing effect during intake, a passage section having a larger cross-sectional area than the hot air passage is installed in the middle of the hot air passage. There has been an intake device for an internal combustion engine that includes an expansion chamber having a large area and introduces hot air into the air passage through the hot air passage and the expansion chamber.

Furthermore, as an internal combustion engine intake control device,
As disclosed in Publication No. 12654, when the internal combustion engine cooling water temperature is sensed and the internal combustion engine is not warmed up, the vacuum motor is activated to close the hot air switching valve even when the intake temperature is lower than the set temperature. Some were equipped with a cooling water temperature valve in the second passage that communicated the pressure chamber and the atmospheric pressure chamber.

[Problem that the invention seeks to solve]

By the way, in a conventional intake system for an internal combustion engine, an air cleaner and a temperature control device are provided separately, and are connected by a first intake communication pipe or a negative pressure pipe. The switching valve in the temperature control device is controlled by a sensor section provided in the air cleaner via a negative pressure pipe.

As a result, the number of parts in the intake system of the internal combustion engine becomes large, the structure of the intake system of the internal combustion engine becomes complicated, and it is not easy to manufacture, resulting in an increase in manufacturing costs and economical problems. It has the disadvantage of being a disadvantage.

Further, since the air cleaner and the temperature control device are formed separately, there is a problem in that it is difficult to downsize the intake device of the internal combustion engine.

[Purpose of the invention]

SUMMARY OF THE INVENTION In order to eliminate the above-mentioned disadvantages, an object of the present invention is to provide a first suction pipe for introducing cold air and a second suction pipe for introducing hot air in communication with each other in an air cleaner case, and to
By interlocking the first and second adjustment valves in the first and second intake pipes to adjust the amount of cold air from the second intake pipe, the number of parts in the intake system of the internal combustion engine can be reduced. An object of the present invention is to realize an intake device for an internal combustion engine that is economically advantageous and can be easily downsized.

[Means for solving problems]

In order to achieve this object, the present invention provides an intake system for an internal combustion engine having a temperature control device that adjusts and introduces the amount of cold air into an air cleaner case. In order to adjust the amount of cold air from these first and second suction pipes, first and second adjustment valves are provided in conjunction with the first and second suction pipes, respectively. It is characterized by:

[Effect]

With the above configuration, when driving the internal combustion engine in cold weather, the first adjustment valve closes the first intake pipe for introducing cold air, and the second adjustment valve opens the second intake pipe for introducing hot air. This causes hot air to be drawn into the internal combustion engine. Further, when the internal combustion engine is warmed up, the first regulating pulp opens the first intake pipe for introducing cold air, and the second regulating valve closes the second intake pipe for introducing hot air, so that the internal combustion engine is warmed up. is inhaling outside air.

〔Example〕

Embodiments of the present invention will be described in detail below based on the drawings.

1 to 4 show embodiments of this invention. 1st
In Figures 1 to 4, 2 is an intake device, and 4 is an air cleaner case. The intake device 2 has an air cleaner case 4. This air cleaner case 4 is provided with a temperature control device 6.

That is, on one side of the air cleaner case 4, there is a first
, a second hole 8.10 is also provided.

A cylindrical first mounting member 12 having a shape in which the lower side of one end side gradually protrudes is fitted into the first hole part 8, and the second hole part 10 has a shape in which the upper side of the one end side gradually protrudes. A cylindrical second mounting member 14 having a diameter is fitted therein.

Further, a first intake pipe 16 for introducing cold air is fixed to the other end side of the first mounting member 12 by a first fixing part 18, and a second intake pipe 16 for introducing cold air is fixed to the other end side of the first mounting member 12.
At the other end of the mounting member 14, there is a second suction pipe 20 for introducing hot air.
It is fixed by a fixing part 22.

Further, on one end side of the first and second hole portions 8 and IO, a first hole is provided.
, the first and twenty-first to open and close the second suction pipe 16.20.
One regulating valve 24, 26 is provided, respectively. At this time, the first adjustment pulp 24 and the second adjustment pulp 26 are
The same rotating wheels 28 while maintaining a predetermined angle deviation of 45 degrees, for example.
is fixed. A valve drive section 30 for driving the first and second switching valves 24 and 26 is provided at one end 28a of the rotation shaft 28. This pulp drive unit 3
0 has a bracket 32, a spring portion 34 inserted into the bracket 32, and a shape memory alloy spring portion 36. The shape memory alloy spring portion used has a change start temperature of, for example, 35°C.

The bracket 32 is installed inside the air cleaner case 4. The rotating shaft 28 has annular parts 34a and 36 formed by the spring part 34 and the shape memory alloy spring part 36, respectively.
a, and is connected to the spring portion 34 and the shape memory alloy spring portion 36 by their ends.

That is, annular parts 34a and 36a are formed at the center of the spring part 34 and the shape memory alloy spring part 36, one end is fixed to the bracket 32, the other end is an open end, and the annular part After passing the end of the rotation shaft 28 through 34a and 36a, the end of the rotation shaft 28 is bent, and the other open ends of the spring portion 34 and the shape memory alloy spring portion 36 are locked. It is intended to be formed.

In addition, the code|symbol 38 is the 2nd fixing|fixed part 22 and the 2nd attachment member 14.
The installation that connects the two is a tool.

Next, the effect will be explained.

When an internal combustion engine (not shown) is driven in cold weather, for example, when the temperature is below 35° C., the shape memory alloy spring portion 36 functions as a spring, and the biasing force between the spring portion 34 and the shape memory alloy spring portion 36 causes the first The regulating valve 24 closes the first suction pipe 16, and the second regulating pulp 26 opens the second suction pipe 20, supplying hot air to an internal combustion engine (not shown).

Further, when the internal combustion engine (not shown) is warmed up and the temperature exceeds 35° C., only the biasing force of the spring portion 34 is driven, and the first regulating valve 24 opens the first intake pipe, and the second regulating valve 24 opens the first intake pipe. The regulating pulp 26 opens the second intake pipe 20 and supplies outside air to the internal combustion engine (not shown).

At this time, the spring portion 34 and the shape memory alloy spring portion 36 can arbitrarily change the rise from a digital rise to a smooth rise.

This makes it possible to omit boost hoses, temperature sensors, etc. compared to conventional internal combustion engine intake systems, and also simplifies the structure of internal combustion engine intake systems, making manufacturing easier. This makes it possible to reduce manufacturing costs and is economically advantageous.

In addition, the temperature control device, which was conventionally installed in a separate location from the air cleaner case, is now installed inside the air cleaner case, making it easier to downsize the intake system for internal combustion engines, contributing to space savings in the intake system. are doing.

Note that the present invention is not limited to the above-described embodiments, and various modifications can be made.

For example, in the embodiment of the present invention, the deviation between the first switching valve and the second switching valve is maintained at 45 degrees, but it may also be arbitrarily determined between 0 degrees and 90 degrees. It is possible.

Further, in the above embodiment, the first and second switching valves were automatically opened and closed by the spring part and the shape memory alloy spring part, but the rotation shafts of the first and second switching valves were extended in the axial direction. It is also possible to provide an extension part and manually switch the first and second switching valves using this extension part.

〔Effect of the invention〕

As explained in detail above, according to the present invention, the first suction pipe for introducing cold air and the second suction pipe for introducing hot air are provided in communication with each other in the air cleaner case, and the amount of cold air from these first and second suction pipes is Since the first and second adjustment valves are provided in the first and second intake pipes in conjunction with each other in order to adjust the The structure of the device can be simplified and manufacturing costs can be reduced, which is economically advantageous. Further, by reducing the number of parts of the intake device of the internal combustion engine, the intake device of the internal combustion engine can be easily downsized, contributing to space saving.

[Brief explanation of the drawing]

1 to 4 show embodiments of the invention, FIG. 1 is a schematic explanatory diagram of an intake system of an internal combustion engine, FIG. 2 is a schematic explanatory diagram of a switching valve, and FIG. The schematic explanatory diagram, FIG. 4, is an explanatory diagram showing the angle and temperature of the intake device of the internal combustion engine. 5 to 7 show the intake system of a conventional internal combustion engine, FIG. 5 is a schematic explanatory diagram of the intake system of a conventional internal combustion engine, FIG. 6 is a schematic perspective view of a conventional air cleaner, and FIG. It is a schematic perspective view of a temperature control device. In the figure, 2 is an intake device, 4 is an air cleaner case,
6 is a temperature control device, 8 is a first hole, IO is a second hole, 12 is a first mounting member, 14 is a second mounting member, 16 is a first suction pipe, 20 is a second suction pipe, 24 is a 1st adjustment valve, 26th
F! regulated pulp, 28 is a rotating shaft, 30 is a valve drive unit, 3
2 is a bracket, 34 is a spring portion, 36 is a shape memory alloy spring portion, and 38 is a mounting tool. Patent Applicant: Suzuki Motor Co., Ltd.
Patent attorney Yoshimi Saigo 6'2-)/
Di' 1st. Indication of the case Japanese Patent Application No. 63-274926 2, Name of the invention Intake device for internal combustion engine 3, Person making the amendment Relationship to the case Patent applicant Address 300 Takatsuka, Kami Village, Hamana District, Shizuoka Prefecture Name (2)
08) Suzuki Motor Co., Ltd. 4, Agent 101 03-292-4
411 (Representative) Address: 2-8-6, Kanda Ogawamachi, Chiyoda-ku, Tokyo, subject of correction +11 Drawing: Figure 3 Figure 4 Figure 5

Claims (1)

[Claims] 1. In an intake system for an internal combustion engine having a temperature control device that adjusts and introduces cold air into an air cleaner case, a first intake pipe for introducing cold air and a second intake pipe for introducing hot air are connected to the air cleaner case. These first
An intake system for an internal combustion engine, characterized in that first and second adjustment valves are interlocked and provided in the first and second intake pipes, respectively, in order to adjust the amount of cold air from the second intake pipe.