JPS5910763A - Controller for auxiliary air - Google Patents

Abstract

PURPOSE:To reduce the dimension of a device in its longitudinal direction without causing a level down of performance, by guiding a sleeve and a spring end face into a groove at retraction of an output rod which controls a passage of auxiliary air responsively operating to temperature of an engine. CONSTITUTION:If an engine 10 is stopped and temperature of cooling water is decreased, an output rod 32 is moved leftward. In accordance with movement of the rod 32 to the left, a sleeve 41 is moved toward an end face 33 of an actuator 30 by tension of a spring 42 while being guided by a guide surface 50, and a valve body 40 is also moved leftward by the sleeve 41. Here because an annular groove 34 is provided, the valve body can be moved further leftward till the sleeve 41 and an end part of the spring 42 are housed in said annular groove 34. Accordingly, even if the sleeve of the same dimension is used, the dimension of a controller in its longitudinal direction can be decreased.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a control device, and particularly to a control device for controlling the amount of auxiliary air supplied to the engine by bypassing the throttle valve in the main intake path during warm-up operation of the engine of a vehicle, etc. Regarding a control device.

A conventional vehicle engine auxiliary air control device includes a heat-sensitive actuator having an output rod responsive to the temperature of engine cooling water.

The movable part has a sleeve moved by the output rod of the actuator, a valve body moved by the sleeve to control the passage of auxiliary air, and the valve body. and the spring mounted between the end of the sleeve and the 'Y! death,
A guide surface for guiding the aforementioned sleeve is formed on the end face of the actuator in the longitudinal direction, and the supply amount of auxiliary air is controlled by controlling the passage area of the bypass passage according to the warm-up condition of the engine. However, in this type of auxiliary air control device, in order to stably hold the valve body Y and reliably guide it in the longitudinal direction, the longitudinal guide surface that guides the sleeve is placed on the flat surface of the actuator. Since the control device is formed from a large end face, the longitudinal dimension of the control device is thick.

SUMMARY OF THE INVENTION It is an object of the present invention to provide an auxiliary air control device which eliminates the aforementioned disadvantages and whose longitudinal dimensions can be reduced without sacrificing performance. has an output rod'k [thermal-sensitive σ] actuator that responds to the temperature of the engine, a movable part that is moved by the output rod, and this movable part includes a sleeve that is moved by the output rod, and a sleeve that is moved by the output rod. The actuator has a valve body for controlling the passage of auxiliary air and a spring mounted between the valve body and one end of the sleeve. An annular groove for accommodating the sleeve is formed, and a guide surface for guiding the sleeve extends in the axial direction from the bottom of the groove.
When the outlet rod is retracted, the ends of the sleeve and spring can be guided into the groove by means of axial guide surfaces, so that the longitudinal dimension σ) of the control device can be reduced.

Next, a preferred embodiment of the present invention will be explained with reference to attached (9).

In the illustrated embodiment, a throttle body 11 is provided as part of the intake system of the engine 10.

A main intake passage 111 for supplying the main air to the engine 10 is formed in this throttle valve 11, and a throttle valve 112 for controlling the amount of air to be supplied is formed here.
has been installed.

A block portion 113 is provided on a part of the outer wall of the throttle body 11.
is completed, and a bypass passage (7-) inlet 114 and outlet 115 are formed here. Bypass entrance 114
and outlet 115 are for supplying auxiliary air to engine 1o by bypassing throttle valve 112, which is fully open, when the engine is operating at 1 degree. ．． 11 , and an outlet 115 opens into the main intake passage 111 downstream of the throttle valve 112 . An auxiliary air control device 20 according to the invention is attached to the block portion 113 of the throttle body 11 . This control device 20 has a heat-sensitive actuator 30.

The actuator 30 has an outer peripheral wall 35 that is connected to the housing 2.
It is press-fitted into the 5vc housing 21 so as to be in contact with the inner circumference of the 5vc housing 21 and fixed with a pin 22. In this fixed state, a space 23 is formed between the housing 21 and the actuator 30. A cooling water inflow pipe 24 and a cooling water outflow pipe 25 provided in the housing 21 communicate with the space 23v-, and both pipes 24 and 25 connect to the engine 1.
The cooling water for the engine 10 circulates in the space 23, and the actuator 30 detects the temperature of the cooling water circulating in the space 23 of the machine. The actuator 30 has an output rod 32 with a length of 7 tons in the longitudinal direction depending on the temperature of the detected cooling water. Actuator 30
Between VC&″f,.

The movable part 400 attached to the output rod 32 is provided with a ring 31 to seal between the two to prevent leakage of cooling water.

A sleeve 41 fitted into the output rod 32 and supported by the leading end of the output rod 32;
play) 43'F! The valve body 40 has a substantially conical valve body 40 fixed through a valve body 40, and a spring 42 provided between one end of the sleeve 41 and a plate 43 fixed to the bottom of the valve body 40.

A valve seat 441 is provided on the seat 44 facing the valve body 40, and the valve body 40 and the auxiliary air passage formed between the hole 26 communicating with the inlet 114 and the hole 27 communicating with the outlet 115 are provided with a valve seat 441. They are designed to cooperate to control the fti.

Further, a spring 45 is inserted between the valve body 40 and the seat 44, and the valve body 40 is loaded to the left in the figure.

The actuator 30 has an end surface 3 perpendicular to its outer peripheral wall 35.
A sleeve 41 is slidably fitted onto the guide surface 50, and the valve body 40 has a guide surface 50 extending in the longitudinal direction on the third side.
・The radial positioning is done.

The aforementioned end surface 33 of the actuator 30 is formed with an annular groove 34 for accommodating the ends of the sleeve 42 and the sleeve 41 when the lift of the cutting rod 32 is small. extends from the bottom of the annular groove 34 in the axial direction.

In the illustrated embodiment, when the engine 10 is warmed up, the temperature i of the cooling water is low, so the valve body 40 is moved to the valve seat 441 as shown in the figure.
The inlet 114 and outlet 11 of the bypass passage
5. Therefore.

The engine 10 includes an inlet 114, a valve seat 441. Exit 11
Auxiliary air is supplied through the five injectors (not shown).
An increased amount of fuel is supplied.

As the engine 10 warms up and the temperature of the cooling water rises, the actuator 30 detects the temperature of the cooling water circulating in the space 23, and its output rod 32 moves to the right in the figure, and the valve body 40 It moves to the right in the figure through the sleeve 41 against the force of the spring 45 and approaches the valve seat 441 to reduce the passage area of the bypass passage between the inlet 114 and the outlet 115, thereby reducing the amount of auxiliary air. It decreases as the warm-up operation progresses. When the warm-up of the engine 10 is completed and the temperature of the cooling water rises to the set temperature, the output rod 32 moves further to the right, the valve body 40 contacts the valve seat 441, and the bypass passage is closed, thereby reducing the supply of auxiliary air. Stop supply. When the cooling water σJ humidity temperature further rises above the set temperature, the sleeve 41 is moved further to the right against the force of the spring 42, and its tip enters the hollow relief part 401 of the valve body 40 and escapes. I can do it.

Further, when the engine 10 stops and the cooling water temperature decreases, the output rod 32 moves to the left in the figure. As the output rod 32 moves to the left, the sleeve 41 moves toward the end surface 33 of the actuator 30 by the blade of the spring 42 while being guided by the guide surface 50, and the valve body 41 also moves to the left by this sleeve 41. Moving.

At this point, in the actuator according to the prior art, the sleeve 41 abuts against the end face 33, but in the device according to the present invention, the annular groove 34 is provided, so that the ends of the sleeve 41 and the spring 42 are in contact with the end face 33. It is then possible to move further to the left until it is accommodated within the groove 34. Therefore, even if sleeves of the same size are used, the longitudinal dimension Y of the control device can be reduced.

The above-mentioned embodiment was described as having a heat-sensitive actuator that operates by detecting the temperature sound of the engine coolant, but it is also possible to use an actuator that operates by detecting the engine oil temperature sound. You can also. My father used an electric heating device (heat wire, P
It is also possible to operate a heat-sensitive actuator tough using TC, etc.).

[Brief explanation of the drawing]

The drawings are schematic sectional views showing preferred embodiments of the present invention. 20...F control device, 30...Actuator. 32...Output lot, 33...End face, 34...Groove. 40... Valve body, 41... Sleeve, 42... Spring, 50... Guide surface, 400... Movable part. Representatives: Asamura and 4 people

Claims (1)

[Claims] A control device (2) for controlling the amount of auxiliary air supplied to the engine by bypassing the throttle valve in the main intake path.
0), the output lot (
a heat-sensitive actuator (30) having a movable part (32') and a movable part (32') moved by the output rod (32)
The movable part (400) has a sleeve (41) which is moved by the output rod (32). A valve body (40) is moved by the sleeve (41) to control the passage of auxiliary air, and a spring (42) is mounted between the valve body (40) and one end of the sleeve (41). ), and the sleeve (41) and the spring (4) are provided on the end surface (33) of the a/f unit (30).
An annular groove (34) for accommodating the end of the sleeve (41) is formed, and a guide surface (50) for guiding the sleeve (41)'Y extends in the axial direction from the bottom of the groove (34). Auxiliary air system.