JPS58219433A - Cooling water control apparatus for adjusting assembled engine - Google Patents

Abstract

PURPOSE:To shorten a standby time to a large extent and to improve workability, by holding high temperature cooling water which is returned from a cooling water outlet port in a tank, and filling an engine to be adjusted with said cooling water. CONSTITUTION:One end of a water supply pipe 3 can be connected to a cooling water inlet port 2a of an engine 2. The other end of the pipe 3 is set in liquid in a water. One end of a water returning pipe can be connected to a cooling water outlet 2b. The other end of the pipe 4 is set over the liquid surface of the water tank. A tank 6, which contains the cooling water whose amount is equal to the water for one engine 2, is provided at the intermediate part of the pipe 4. A valve 5 is provided at the intermediate parts of the pipes 3 and 4 between the tank 6 and the engine 2. A valve 5 has positions which connect the upstream sides and downstream sides of both pipes 3 and 4 and a position, which connects the side of the tank 6 of the pipe 4 and the side of the engine 2 of the pipe 3. The high temperature cooling water in the tank 6 is supplied to a new engine 2 to be adjusted by the switching of the valve 5.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a cooling water control device for adjusting an assembled engine.

Before the assembled automobile engine is mounted on the vehicle body, it is placed on a trolley 1 and circulated while undergoing various adjustments such as idle link adjustment, air-fuel ratio adjustment, ignition timing adjustment, and exhaust gas adjustment. Ru.

In the case of a water-cooled engine, the adjustment of each of the above parts is performed by filling the cooling water passage (water jacket) inside the engine with low-temperature cooling water, and then performing ignition operation until the low-temperature cooling water reaches the predetermined temperature (85°C). This is done after the water has cooled to a high temperature. That is, when the engine is ignited, the thermostat provided on the cooling water outlet side is activated, and the high temperature cooling water flows out from the cooling water outlet, and the water return pipe connected to the cooling water outlet is activated. The water is returned to the water tank through
This is carried out after a state in which low-temperature cooling water from the water storage tank is taken into the engine from the engine's cooling water intake through the water supply pipe, that is, a state in which the cooling water is circulated is established.

Therefore, a long waiting time is required to adjust each part until the low-temperature cooling water reaches a predetermined high temperature of τ due to engine ignition operation, resulting in large loss time and poor work efficiency, as well as low fuel efficiency. There is a problem of increasing

This invention was made in view of the above-mentioned conventional problems, and provides a cooling water control device for adjusting an assembled engine, which can significantly shorten the waiting time when adjusting each part of the engine, improve work efficiency, and reduce fuel consumption. The purpose is to provide.

Embodiments of the present invention will be described below with reference to the drawings.

In FIG. 1, l is a truck, 2 is a water-cooled engine that has been assembled, and a well-known cooling water passage (water jacket) is provided inside, and a cooling water intake port 2a corresponding to the cooling water passage. and a cooling water outlet 2b, and the engine is carried out along a predetermined closed loop (not shown) along with the trolley 1 from an engine loading station provided in the closed loop while being placed on the upper surface of the truck 1. The engine is moved to a station, and during this movement, adjustments are made to various parts, such as idling adjustment, air/fuel efficiency adjustment, ignition timing adjustment, and exhaust gas adjustment.

8 is a water supply pipe, 4 is a return pipe, 5 is a valve, 6 is a tank,
These are installed as piping on the bogie l, and one end of the water supply pipe 8 can be detachably connected to the cooling water intake port 2a of the engine 2 via the valve 7, and the other end is attached to the bogie 1. Corresponding to the closed-loop orbit of , the cooling water in the water storage tank 8 provided in the closed loop above is faced. Note that the cooling water in the water storage tank 8 is constantly maintained at about 60° C. by a heating means (not shown).

One end of the water return pipe 4 can be detachably connected to the cooling water outlet 2b of the engine 2 via a valve 9, and the other end opens above the liquid level (water surface) of the water storage tank 8, and A tank 6 that holds the amount of cooling water for at least one engine is interposed in the middle. By the way, in the case of a water-cooled engine with a displacement of 1800 cc, approximately 8.5 tons of cooling water is required for one engine.

The valve 5 is interposed between the water supply pipe 8 and the water return pipe 4 on the side where the tank 6 and the engine 2 are connected, and is located at a position 5A that connects the upstream 8a and downstream 8b of the water supply pipe 8 and the upstream 4a and downstream 4b of the water return pipe 4.
and a position 5B that connects the tank side of the water return pipe 4, that is, the downstream 4b, and the engine side of the water supply pipe 8, that is, the downstream 8b. It can be switched freely depending on the input signal.

On the other hand, downstream of the valve 9 in the upstream 4a of the return pipe 4,
A water temperature sensor 10 that detects the temperature of the cooling water is interposed, and a detection signal of this water temperature sensor IO is transmitted to the switching drive unit 5 of the valve 5.
input to a. Further, a check valve 11 is interposed downstream of the water temperature sensor 10, and an air vent pipe 18 equipped with a float check valve 12 is connected downstream of the check valve 11. The thermostatic pulp of the 14U engine 2 is shown in the figure.

In the above configuration, the assembled engine 2 before adjustment is placed on the trolley 1 at the carry-in station position.

Once the engine 2 is placed on the truck 1, one end of the water supply pipe 8 is connected to the cooling water intake port 2a of the engine 2, and one end of the water return pipe 4 is connected to the cooling water outlet 2b of the engine 2.

Then valve 7.9 is opened. In this way, valve 7.
9, the cooling water held in the tank 6 passes from the downstream 4b of the water supply pipe 4 through the valve 505B position, passes through the downstream 8b of the water supply pipe 8, and enters the cooling water passage (quarter jacket) in the engine 2. ) is filled. in this case,
Since the thermostatic valve 14 is closed, the air existing in the cooling water passage in the engine 2 is transferred from the downstream 8b of the water supply pipe 8 → the 5B position of the valve 6 → the downstream 4b of the return pipe 4 → the tank 6 → the return pipe 4 is discharged to the atmosphere from the most downstream path 4bx.

After filling the cooling water passage in the engine 2 with the cooling water held in the tank 6, the engine 2 is started and ignition operation is performed.

During the ignition operation of the engine 2, when the temperature of the cooling water filled in the engine 2 rises to about 85°C, the thermostat pulp 14 is opened, and the high temperature cooling water is released from the cooling water outlet 2b. It flows out to the upstream 4a of the water return pipe 4. Therefore, the water temperature of this high-temperature cooling water that flowed out is determined by the water temperature sensor lO.
This detection signal is detected by the switching drive unit 5 of the valve 5.
a and switches the valve 5 to the state shown in FIG.

By switching the valve 5 to the state shown in FIG.
Position A→If the high temperature cooling water is returned to the tank 6 via the downstream 4b of the return waterway 4, and the high temperature cooling water continues to flow back even after the tank 6 reaches a predetermined amount, the return water from the tank 6 to the return water pipe 4. The water is returned to the water storage tank 8 via the most downstream portion 4b1. At the same time, water tank 8
The cooling water maintained at 60°C in the water is passed through the upstream 8 map of the water supply pipe 8 → the 5A position of the valve 5 → the downstream 3b of the water supply pipe 8, and then passes through the cooling water intake 2 & of the engine 2. The cooling water flows into the internal cooling water passage to obtain a circulating state of cooling water.

In this way, as the trolley l moves after the cooling water is circulated, various parts of the engine 20 are adjusted, including idle link adjustment, air-fuel ratio adjustment, ignition timing adjustment, and exhaust gas adjustment. Engine 2 finished
arrives at the engine unloading station together with the truck 1.

When the engine 2, which has completed the adjustment of each part described above, reaches the engine unloading station, first close the valve 7.9, then connect one end of the water supply pipe 3 from the cooling water intake port 2a of the engine 2. One end of the water pipe 4 is separated from the cooling water outlet 2b of the engine 2, and then the engine 2 is removed from the truck 1 and transported to a predetermined location for storage.

Subsequently, the truck 1 returns to the engine loading station, and the next engine 2, that is, the engine 2 to be newly adjusted, is placed on the truck 1, and the water supply pipe 8 is connected to the cooling water intake port 2a of this engine 2. One end of the water return pipe 4 is connected to the cooling water outlet 2b.

Next, turn the ignition switch of engine 2 to O.
Do N. At the same time as the engine is ignited by turning on the ignition switch.

Ignitsu 7: The signal outputted from the water temperature sensor 10 to the switching drive section 5a of the valve 5 is canceled by the 1-switch ON signal.

Valve 5 is therefore switched to the state shown in FIG.

The high temperature cooling water held in the tank 6 is supplied to the engine 2.
Hereinafter, the above operation is repeated, but the cooling water passage inside the engine 2 that needs to be newly adjusted is filled with high-temperature cooling water held in the tank 6 in advance. Therefore, the waiting time until the thermostat pulp 14 is opened and the cooling water is circulated is significantly shortened, and it is possible to improve workability and reduce fuel consumption.

Note that the switching of the valve 5 may be performed manually.

As explained above, according to the present invention, the high-temperature cooling water that is returned from the cooling water outlet via the thermostatic valve during engine ignition operation is held in the tank, and this held high-temperature cooling water is Since the structure is configured so that the cooling water passage in the engine that needs to be newly adjusted is filled with cooling water of Compared to conventional models, the waiting time for the cooling water filled in the engine to rise to the specified temperature and circulate can be significantly shortened, which has the advantage of improving work efficiency and reducing fuel consumption. There is.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram showing the state when cooling water is injected into the cooling water control device according to the present invention, and FIG. 2 is an explanatory diagram showing the state when the same cooling water is being circulated. 2...Engine%21...Cooling water intake, 2b...
・Cooling water outlet, 3... Water supply pipe, 8a... Upstream, 8
b...downstream, 4...return pipe, 4a...upstream, 4b
, 4bt...downstream, 5--valve, 6--tank, 8-
··Water storage tank. Patent applicant Toyo Kogyo Co., Ltd. Representative Patent attorney Kunihide Namba (1 other person) Figure 1 Figure 2

Claims (1)

[Claims] (1) In a device that adjusts various parts of the engine while filling the assembled engine with cooling water and igniting it, one end can be connected to the engine's cooling water intake, and the other end is immersed in the liquid in the water tank. The facing water supply pipe has one end that can be connected to the engine's cooling water outlet, the other end that opens above the liquid level of the water tank, and a tank that holds at least the amount of cooling water for one engine. An interposed water return pipe, a valve interposed on the construction/engine connection side of the rainwater pipe from the tank and having a position connecting the upstream and downstream of the both pipes, and a position connecting the tank side of the water pipe and the engine side of the water supply pipe. A cooling water control device for adjusting an assembled engine, characterized in that the high temperature cooling water in the tank is supplied to the engine to be newly adjusted by switching the valve.