JPH05195860A - Water jacket capacity variable device - Google Patents

Abstract

PURPOSE:To provide a heater having a water jacket capacity variable device in which water temperature of the water jacket in a cylinder block is quickly raised in a cold period heating effect in a vehicle room can be given, and the construction is simple. CONSTITUTION:A movable partition wall 5 to change the cooling water capacity of the water jacket 3 is provided in a cylinder block 1, and springs 9 are mounted in an air chamber 6 formed out of the side of the movable partition wall and a casing 4, as a means to move the movable partition wall 5 according to the water temperature and the water pressure of the cooling water. Otherwise, push rods actuated by electromagnetic solenoids are arranged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water jacket capacity varying device as a cooling water temperature adjusting device relating to the performance of a heater using cooling water for a vehicle engine.

[0002]

2. Description of the Related Art Conventionally, regarding the performance of a heater for heating a vehicle compartment using cooling water for an engine for a vehicle, the temperature of the cooling water rises slowly during cold weather. Therefore, hot air is blown from the heater into the vehicle interior. It is insufficient and the room temperature tends not to rise easily. In extremely cold regions such as diesel engines, the water temperature may not rise sufficiently.

As a method of controlling the cooling water temperature in order to improve the performance of the heater in cold weather, there have been conventionally proposed methods, for example, JP-A-57-181918 and JP-A-62-247114. However, in any of the above methods, a special bypass passage or control valve is installed in the cooling water passage outside the water jacket of the cylinder block body so that the inside of the cooling water passage can be adjusted according to the outside air temperature, engine cooling water temperature, etc. The cooling water temperature is adjusted by controlling the flow path and flow rate of the cooling water. However, in any of the above methods, the water temperature in the water jacket is indirectly adjusted, so that the immediate effect is poor and the configuration is complicated.

[0004]

In view of the above problems,
In the present invention, the water jacket capacity varying device as a cooling water temperature adjusting device that can quickly increase the water temperature of the water jacket in the cylinder block during cold weather to improve the vehicle interior heating effect and has a simple structure. An object of the present invention is to provide a heater having

[0005]

In order to achieve the above object, in the present invention, a movable partition for changing the cooling water capacity of the water jacket in the cylinder block and the movable partition are adjusted to the water temperature and water pressure in the water jacket. Provided is a water jacket capacity varying device having means for moving in response.

As means for moving the movable partition, a spring is mounted in an air chamber formed by the movable partition and a housing, or a push rod which is moved by an electromagnetic solenoid is arranged.

[0007]

In cold weather, when the cooling water temperature in the water jacket is low, the water pressure is low and the pressure applied to the movable partition wall is small. When a spring is arranged in the air chamber,
The spring presses the movable partition wall and moves the partition wall in a direction in which the water jacket cooling water capacity decreases. At this time, the cooling water capacity is small, so the temperature rise rate of the cooling water is high and the cooling water temperature is high. As a result, the temperature of the cooling water in the heater rises quickly, and the temperature in the passenger compartment rises rapidly.

When the push rod of the electromagnetic solenoid is arranged in the air chamber, when the cooling water temperature is low and the pressure is low, the electromagnetic solenoid acts and the push rod moves the movable partition wall in the direction in which the cooling water capacity decreases. As a result, the temperature of the cooling water rises quickly, the temperature of the heater rises,
The cabin temperature rises quickly.

[0009]

Embodiments of the present invention will be described with reference to the drawings. 1 to 3 show the first embodiment. In the figure, 1 is a cylinder block, 2 is a cylinder bore, 3 is a water jacket, 4 is a housing, 5 is a movable partition (hereinafter also abbreviated as a plate), and as shown in FIG. Since the water pressure in the water jacket 3 is low, the plate 5 is pressed against the outer wall of the cylinder bore 2 by the biasing force of the spring 9 so that the capacity of the water jacket 3 becomes the minimum capacity. Is crimped to. The spring 9 presses the plate 5 in the air chamber 6 in the housing 4 to the state shown in FIG. 1, the volume of the air chamber 6 is maximum, and the volume of the water jacket 3 is minimum. The air chamber 6 is provided with an air passage 7 in its housing 4,
Air can come and go from here according to the expansion and contraction of the. An O-ring 8 is provided between the housing 4 and the plate 5.
Is provided to seal the plate 5 so that water does not leak between the air chamber 6 and the water jacket 3 when the plate 5 moves.

With the above construction, when the engine is cold, it is in the state shown in FIG.
When the water temperature in the water jacket 3 rises, the cooling water expands and its pressure rises, the spring 9 is pushed by the water pressure in the water jacket 3 and gradually contracts, and the plate 5 gradually moves away from the outer wall of the cylinder bore 2. Finally, as shown in FIG. 2, the plate 5 is fully opened, the capacity of the cooling water in the water jacket 3 is maximized, the engine is sufficiently cooled, and normal operation is continued. The increase / decrease in the engine cooling water due to the change in the water jacket capacity is compensated by the increase / decrease in the amount of water in the radiator reserve tank.

By the above process, the cooling water capacity of the water jacket 3 becomes small when the water temperature is low, and becomes large when the water temperature is high. In the case of the prior art, this cooling water capacity is fixed to the maximum capacity as shown in FIG. 2 so that sufficient cooling can be performed when the engine is operating. It takes time for the temperature of the cooling water to rise, so
In winter, the temperature of the cooling water rises slowly, and the warm air does not easily blow out through the heater and the room temperature does not rise.

According to the present embodiment, as shown in FIG. 1, at a low temperature, the cooling water capacity of the water jacket 3 is small, so that the temperature of the water is rapidly raised, so that the temperature of the heater is also rapidly raised. The warm air is quickly and sufficiently blown into the vehicle compartment from the heater at low temperatures. By the above process, the cooling water capacity of the water jacket becomes smaller when the water temperature is low, and becomes larger when the water temperature is high, so that the performance of the heater at low temperature is sufficiently secured and the cooling of the engine at high temperature is performed. Efficiency is also sufficient.

FIG. 4 shows a second embodiment of the present invention. As shown in the figure, in this embodiment, a push rod 10 and an electromagnetic solenoid 11 for moving the push rod 10 are used instead of the spring 9 in the above case. As shown in the figure, when the engine temperature is lower than a predetermined temperature, the plate 5 is pushed by the push rod 10 by the action of the electromagnetic solenoid 11 to push out the plate 5, and the cooling water capacity of the water jacket 3 becomes small. Similar to the embodiment, the performance of the heater at low temperature is sufficiently ensured. When the engine starts operating and the temperature of the cooling water becomes higher than a predetermined value, the push rod 10 is pulled down by the action of the electromagnetic solenoid 11 and the plate 5 moves accordingly, and the cooling water capacity of the water jacket 3 becomes large as shown in FIG. And the engine is cooled sufficiently. In this case, the electromagnetic solenoid 11 is turned on and off at a predetermined temperature of the engine so that the plate 5 is opened and closed.
It is done in OFF.

Although two examples of the spring and the electromagnetic solenoid have been described as the opening / closing means for the plate 5, the opening / closing means for the plate 5 according to the present invention is not limited to this, and the scope of the claims is not limited thereto. Within
It goes without saying that other types of means also apply. For example, it is also possible to use a push rod in which thermowax is enclosed and to open and close the plate 5 by utilizing the operation of expansion and contraction accompanying the temperature change. It is also possible to use the expansion and contraction of the shape alloy.

As described above, according to the present invention, unlike the conventional example, it is possible to control the heater performance with immediate effect in cold weather by using means for directly increasing or decreasing the cooling water volume in the water jacket. Became.

[0016]

By implementing the present invention, the capacity of the cooling water in the water jacket is changed as necessary, thereby maintaining the cooling capacity of the engine and ensuring the heater performance with immediate effect in cold weather. be able to.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a spring water jacket capacity varying device according to a first embodiment of the present invention when the water jacket capacity is minimum.

FIG. 2 is a cross-sectional view when the water jacket capacity is maximum in the first embodiment.

FIG. 3 is a perspective view of a cylinder block used in the first embodiment of the present invention.

FIG. 4 is a sectional view of a water jacket capacity varying device with an electromagnetic solenoid according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Cylinder block 2 ... Cylinder bore 3 ... Water jacket 4 ... Housing 5 ... Movable partition (plate) 5a ... Wall surface on one side of the movable partition 5b ... Wall surface on the other side of the movable partition 6 ... Air chamber 7 ... Air passage 8 … O-ring 9… Spring 10… Push rod 11… Electromagnetic solenoid

Claims (3)

[Claims] 1. A water-cooled engine having a heater system using engine cooling water, wherein a wall surface (5a) on one side of a cylinder block (1) is in contact with cooling water in a water jacket (3). Movable partition wall (5) for changing the cooling water capacity in the water jacket (3) by moving the water jacket (3), and means for moving the movable partition wall (5) according to the water temperature and water pressure in the water jacket (3). A water jacket capacity varying device characterized by having and. 2. As a means for moving the movable partition (5), an air chamber (6) formed by a wall surface (5b) on the other side of the movable partition (5) and a housing (4) is provided. The water jacket capacity varying device according to claim 1, further comprising a spring (9) for pressing a wall surface (5b) on the other side of the movable partition wall (5). 3. An electromagnetic solenoid in an air chamber (6) formed by a wall surface (5b) on the other side of the movable partition (5) and a housing (4) as a means for moving the movable partition (5). (11), and the movable partition (5)
Push rod (1) that presses the wall surface (5b) on the other side of
0) is provided, The water jacket capacity variable device according to claim 1.