JPS6287605A - Water jacket device of v-type engine - Google Patents

Abstract

PURPOSE:To improve the fitting workability of collecting pipes by providing a cooling water outlet communicated to a water jacket at one end in the crank shaft direction of each cylinder head. CONSTITUTION:A water jacket 5 is formed on each upper cylinder head 4 of a pair of banks 2 of a V-type engine 1. A cooling water outlet 6 communicated to each water jacket 5 is provided on each cylinder head 4. Each cooling water outlet 6 is provided at a position displaced toward the V-bank space side from the plane of projection in the cylinder shaft direction of a combustion chamber 11 on one end 4a in the crank shaft direction of each cylinder head 4. Accordingly, the fitting workability of collecting pipes connected to both outlets can be improved, and an air is hardly collected in each water jacket.

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a water jacket device for a V-type engine.

(Prior Art) Conventionally, a water jacket is formed in each upper cylinder head of a pair of banks of a V-type engine, and a cooling water outlet is provided in each cylinder head to communicate with each water jacket. The jacket device is from Japanese Patent Publication No. 5
It is known from Japanese Patent No. 8-107840, and in this case, each cooling water outlet is generally formed on the side surface of each cylinder head r on the V panning space side.

(Problems to be Solved by the Invention) In the above-mentioned conventional type, an intake port or an exhaust port is provided on the side surface of each cylinder head on the V-nonk space side, and an intake manifold connected to these ports is an exhaust manifold. exists in the V-bank space, it is difficult to install a collecting pipe that joins the cooling water from these connected to the rain cooling water outlet and guides it to the radiator side, and the piping is complicated. Therefore, it is desirable to open each cooling water outlet on the end face of each cylinder head on one side in the crankshaft direction to improve workability in installing the collecting pipe and to improve the arrangement of the pipes. Air pockets in the water jacket of the head become a problem.

An object of the present invention is to provide a device that solves these problems.

(Means for Solving the Problems) In order to achieve the above object, the present invention provides one of the V-type engines.
A water jacket is formed on each upper cylinder spatula r of a pair of banks, and a cooling water outlet is provided in each cylinder head to communicate with each water jacket, and each cooling water outlet is connected to each cylinder head. It is characterized in that it is provided at a position away from the projection plane of the combustion chamber in the cylinder axis direction at one end in the crankshaft direction toward the V panning space side.

(Example) The invention will now be described with reference to illustrative embodiments.

In the drawing, (1) is a V-type engine mounted horizontally on a vehicle.
(2) (2) shows a pair of front and rear knockers of the engine, and each bank (2) includes a cylinder block (3) having three cylinders in a horizontal row;
It consists of a cylinder spatula P (4) assembled on the upper side of the
Water jacket (5) on each cylinder head (4)
A cooling water outlet (6) communicating with each water jacket (5) is provided in each cylinder head (4).

In the drawing, (7) (7) indicates the water jacket (7) of each cylinder head (4) formed in each cylinder block (3).
5), (8) (8) is a cooling water inlet that communicates with each water jacket (7) provided in each cylinder block (3), and (9) is a water jacket that communicates with each cylinder block (3). 8) through these water jackets (5)
) (5), (8) One common water pump that sends cooling water to (8), (7) has both cooling water outlets (6)
(6) shows a collecting pipe connected to these that joins the cooling water and guides it to the radiator side.

According to the present invention, each cooling water outlet (6) is arranged in a V-bank from the projection plane of the combustion chamber (b) of the end face (4a) on one side in the crankshaft direction of each cylinder head (4) in the cylinder axis direction. In the case shown in the figure, each cooling water outlet (6) is provided at a position apart from the space side, and as shown in FIGS. 3 and 4, each cylinder head (4) An end face (4a) on the transmission case side (not shown) on the right side in FIG. 1 on one side in the crankshaft direction is provided to protrude in the crankshaft direction.

In the drawings, @ indicates the timing belt on the other side of the V-type engine (1) in the crankshaft direction.

In addition, the dotted line portion indicated by (to) in FIG. It is located above.

(Function) When the cooling water outlet (6) of the water jacket (5) of each cylinder head (4) is provided on the end face (4a) of one side in the crankshaft direction of each cylinder head (4), the water jacket (5) is generally formed in a size that almost surrounds the combustion chamber (B), so each outlet (5) is positioned from the projection plane of the end face (4a) of the combustion chamber (B) in the cylinder axis direction. If the V pan is installed in a position away from the space, each outlet (6) will be located diagonally above each water jacket (5), and the air inside each jacket (5) will be quickly drained. The air is then discharged to the outside of each jacket (5), making it difficult for air to accumulate inside it.

(Effects of the Invention) According to the present invention, each cooling water outlet is provided on the end face of each cylinder head on one side in the crankshaft direction.
It is possible to improve the installation workability of the collecting pipes connected to both of the outlets, and it is also possible to have relatively well-organized piping. Since it is provided at a position away from the projection plane toward the V-bank space, it has the effect that air pockets are not likely to be generated in each water jacket, and therefore, the cooling performance of the engine is not impaired.

[Brief explanation of drawings]

Fig. 1 is a plan view of a ■-type engine equipped with an example of the device of the present invention, Fig. 2 is a left side view thereof, Fig. 3 is a partially cut-away right side view, and Fig. 4 is a section taken along the line - IV of the same. FIG. (1)...V temperature engine (2) (2)...
Bank (4) (4)...Cylinder head (4aH
4a)...End face (5) (5)...Water jacket (6) (6)...Cooling water outlet (2)...Combustion chamber Patent applicant Honda Motor Co., Ltd. Figure 2, Figure 3 figure

Claims (1)

[Claims] A water jacket is formed in each upper cylinder head of a pair of banks of a V-type engine, and each cylinder head is provided with a cooling water outlet communicating with each water jacket, wherein each cooling water outlet A water jacket device for a V-type engine, characterized in that the water jacket device is provided at a position away from the projection plane of the combustion chamber in the cylinder axis direction at one end in the crankshaft direction of each cylinder head toward the V bank space side.