CN2522286Y

CN2522286Y - Engine cooling system water-temperature control mechanism

Info

Publication number: CN2522286Y
Application number: CN 02201328
Authority: CN
Inventors: 林宇洲
Original assignee: Industrial Technology Research Institute ITRI
Current assignee: Industrial Technology Research Institute ITRI
Priority date: 2002-01-09
Filing date: 2002-01-09
Publication date: 2002-11-27
Anticipated expiration: 2012-01-09

Abstract

The utility model provides a water temperature control mechanism for engine cooling system. The utility model has two additional temperature control valves that change the position of the valves to control the flow of water into the engine by means of the property of metal expansion on heating and contraction on cooling. A control valve controls the size of a bypass according to cooling temperature of a cylinder head water jacket and adjusts shunt flow volume of the cooling water to control temperature of the engine when the engine is in operation, thereby avoiding the problem of overcooling existing in prior art. The other temperature control valve controls the shunt flow volume that directly flows into the cylinder head water jacket according to cooling temperature of the cylinder head water jacket, which breaks with convention that the cooling water of engine flows into the cylinder head after passing the cylinder body, thus,adjusting the temperature of cylinder body and cylinder jacket to improve a situation that the temperature of the water jacket is low.

Description

Engine cooling system Water temp controller structure

Technical field

The utility model relates to a kind of engine cooling system Water temp controller structure, can be present automobile, electrical generator, draft engine or the relevant facility of engine drive a kind of more practical engine cooling system is provided.

Background technology

Now in the society, no matter be electrical generator, automobile or large-scale facility etc., the engine that all needs a stability and high efficiency rate, and engine institute role is equivalent to the heart in the human body, dominate and regulate the running of its mechanism, a good engine must be stood for a long time running efficiently, especially when emergency, must bring into play its effect in real time, but often when emergency, because warm-up period is oversize can't in time to reach maximum effect, or when long-time low load operation, the cooling system over cooling makes engine temperature on the low side, cause engine efficiency not high, so the circulating system in the engine be if can reach the temperature of a high-speed operation in the short time, and all can keep an equilibrium temperature, be one of the problem that need improve of present engine.

General existing engine cooling (circulation) systems technology as shown in Figure 1, when cold machine, coolant water temperature is low, and coolerstat 5 is closed, during water pump 3 (water pump) running, cooling water expansion tank can't flow into water pump 3 from water tank 4, and sucks from the runner 6 (bypass) of cylinder head 1, enters in cylinder body (cylinder) 2 water jackets again, the water cylinder head (head) 1 of flowing through again, so cause interior circulation, make the coolant water temperature energy fast rise of cylinder head 1 and cylinder body 2, reach normal working temperature.And behind warming-up, coolant water temperature rising coolerstat 5 is opened, and the runner 6 of cylinder head 1 is closed, cooling water expansion tank in the water tank (radiator) 4 is sucked by water pump 3 and enters cylinder body 2, the cylinder head 1 of flowing through again flows out from the outlet of cylinder head water jacket and to enter water tank 4 coolings, so forms normal cooling system circulation running.

This traditional cooling system has the phenomenon of over cooling (over cooling), because the design of cooling water inflow is calculated during all with engine WOT, but only running under part load (partial load) state of engine in the time of most, and water pump 3 flows are only relevant with rotating speed, so it is excessive to have cooling water expansion tank, cause supercooling, the increase of engine loss due to friction, efficient are reduced.And also have cylinder body water jacket water temperature phenomenon on the low side, the heat of required cooling is more than cylinder body and cylinder sleeve because cylinder head burns, and general engine cooling water flows to cylinder head by cylinder body, causes cylinder body that supercooling is arranged, make the cylinder sleeve temperature on the low side, loss due to friction increases during piston operation.

Technology contents

Main purpose of the present utility model, be to solve above-mentioned defective, avoid the existence of defective, the utility model provides a kind of engine cooling system Water temp controller structure, utilize the notion of a shunting (bypass), solve supercooled problem, and just flow directly into the design of cylinder head, improve jacket water temperature phenomenon on the low side according to the coolant water temperature of cylinder body water jacket.

For realizing above-mentioned purpose, the utility model provides a kind of engine cooling system Water temp controller structure, utilize the notion of a shunting (bypass), set up a temperature control valve by the characteristic of expanding with heat and contract with cold at cylinder head water jacket place respectively, the assignment of traffic that cooling water expansion tank flows into engine and is back to water pump is controlled in the position that changes valve head; And between cylinder body water jacket and cylinder head water jacket, set up second temperature control valve again, adjust the flow that cooling water expansion tank flows directly into cylinder head and flows into cylinder body.

This design can directly be flowed back to water pump with the part cooling water expansion tank automatically when engine generation over cooling, the cooling water expansion tank that flows into engine is reduced, and exempts supercooled problem in the prior art; And improve in the conventional engine, cooling water expansion tank must flow to the design of cylinder head earlier again via cylinder body, the utility model is regulated cooling water expansion tank without cylinder body water jacket according to the coolant water temperature height of cylinder body water jacket, flow directly into the design of cylinder head, to improve jacket water temperature phenomenon on the low side.

Description of drawings

Fig. 1 is existing engine cooling system scheme drawing.

Fig. 2 is an engine cooling system scheme drawing of the present utility model.

Fig. 3 is the condition diagram of cooling system of the present utility model cooling water flow when cold machine.

Fig. 4 is the condition diagram of cooling system of the present utility model cooling water flow when the cylinder body water jacket temperature is low.

Fig. 5 is the condition diagram of cooling system of the present utility model cooling water flow when full load.

Fig. 6 is the condition diagram of cooling system of the present utility model cooling water flow when the cylinder body water temperature is high.

Fig. 7 is the condition diagram of cooling system of the present utility model cooling water flow when part load.

Fig. 8 is the condition diagram of cooling system of the present utility model cooling water flow when the cylinder body water jacket temperature is higher.

The specific embodiment

The utility model provides a kind of engine cooling system Water temp controller structure, by setting up two materials is cured or the bimetallic type temperature control valve, the characteristic that utilization is expanded with heat and contract with cold, the position that changes valve head is to regulate the assignment of traffic of cooling water expansion tank, this two temperature control valve is provided with first temperature control valve 11 respectively at cylinder head water jacket 12 places, sets up one second temperature control valve 15 in cylinder body water jacket 14 and 12 of cylinder head water jackets.First temperature control valve 11 is arranged in the cylinder head 1, also can be arranged on to be connected on the cylinder head water jacket 12 outer pipelines, and second temperature control valve 15 is arranged on the cylinder body 2, also can be arranged on to be connected on the cylinder body 2 outer pipelines.

Be illustrated in figure 2 as engine cooling system scheme drawing of the present utility model, set up one first temperature control valve 11 between water pump 3 and engine, this control cock is controlled the water yield that cooling water expansion tank flows into engine according to cylinder head 1 temperature, when temperature is hanged down, the water that flows into engine is few, and the water that flows directly into water pump 3 is many; When temperature was gradually high, the water of inflow engine the more came the Control Engine cooling water temperature can reach design-calculated optimum temperature state with this control cock.Set up second temperature control valve 15 again in cylinder head water jacket 12 and 14 of cylinder body water jackets, this control cock is controlled the water yield that cooling water expansion tank flows directly into cylinder head 1 and flows into cylinder body 2 according to cylinder body water jacket 14 water temperatures, makes cylinder head 1 and cylinder body 2 coolant water temperatures can reach design-calculated optimum working temperature state.

As shown in Figure 3, condition diagram for cooling system of the present utility model cooling water flow when the cold machine, at cylinder head water jacket 12 places one first temperature control valve 11 is set, by the characteristic of expanding with heat and contract with cold, the assignment of traffic that cooling water expansion tank flows into engine and is back to water pump 3 is controlled in the position that changes valve head; Be illustrated in figure 4 as the condition diagram of cooling system of the present utility model cooling water flow when the cylinder body water jacket temperature is low, set up a temperature control valve 15 at cylinder body water jacket 14 and 12 of cylinder head water jackets, this control cock can be directly installed on the cylinder body, also can be installed on the outer pipeline, to adjust the flow that cooling water expansion tank flows directly into cylinder head and flows into cylinder body.

Now concrete technology of the present utility model is divided into cold machine, full load is with situations such as part loads and cooperate Figure of description to be described as follows.

1. during cold machine (during startup):

As shown in Figure 3, the coolant water temperature of cylinder body water jacket 14 and cylinder head water jacket 12 is low, and throttle gate 8 is closed, and second runner 13 is unimpeded, and the valve head position of first temperature control valve 11 as shown in Figure 3; When water pump 3 runnings, the part cooling water expansion tank flows back to water pump 3 via first runner 10, part enters collecting chamber 9, enter the engine cooling again, flow back to water pump 3 via second runner 13 more at last, form circulation in, make engine temperature reach operating temperature as quickly as possible, wherein many one first runners 10 can make this engine than the faster warming-up of general engine (worm up).Because the coolant water temperature of cylinder body water jacket 14 is low, the valve head position of second temperature control valve 15 as shown in Figure 4, this moment, the part cooling water expansion tank flowed directly into cylinder head water jacket 12 by collecting chamber 9, the part cooling water expansion tank flows into cylinder body water jacket 14, flow into cylinder head water jacket 12 again, so can make cylinder body 2 temperature reach operating temperature sooner than general engine.

2. during full load (WOT):

As shown in Figure 5, the coolant water temperature of cylinder head water jacket 12 has reached operating temperature, and throttle gate 8 is opened, and second runner 13 is closed, and the valve head position Yin Gaowen of first temperature control valve 11 and being ejected, first runner 10 thereby close; When water pump 3 runnings, cooling water expansion tank enters the engine cooling more all via collecting chamber 9, flows to water tank via 12 outlets of cylinder head water jacket more at last, enters water pump 3 again through interchange of heat, forms the cooling circulation effect of general conventional engine.Because it is more than cylinder body and cylinder sleeve to take away the heat of cylinder head 1 combustion chamber, when general engine has enough cooling water expansion tanks to cool off cylinder head, make the coolant water temperature of cylinder body water jacket 14 lower sometimes (being lower than normal working temperature), the valve head of second temperature control valve 15 as shown in Figure 8, this moment, the part cooling water expansion tank flowed directly into cylinder head water jacket 12 via collecting chamber 9, the part cooling water expansion tank flows into cylinder body water jacket 14, flow into cylinder head water jacket 12 again, the valve head position of temperature control valve 15, will be different and different with cylinder body water jacket 14 temperature, as Fig. 4, Fig. 6, shown in Figure 8, adjust the flow that flows directly into cylinder head water jacket 12 whereby, so can make the cylinder sleeve temperature be controlled at designed efficiency operation range of temperatures.

3. during part load (partial load):

During part load, the heat that engine need cool off reduces, but the flow of water pump 3 does not have minimizing, and the coolant water temperature of cylinder head water jacket 12 is lower at this moment, causes supercooled phenomenon, and this moment, throttle gate 8 was still opened, and second runner 13 is closed, referring to shown in Figure 7; And the valve head position of first temperature control valve 11 is because of contracting in the drop in temperature, first runner 10 thereby unlatching, the size of this first runner 10, to change with the height of cylinder head water jacket 12 temperature, so can control the flow that cooling water expansion tank enters collecting chamber 9, and all can in design-calculated high efficiency range of temperatures, turn round with Control Engine.

The utility model discloses and has described selected preferred embodiment especially, can not limit the scope that the utility model is implemented with it, be that all persons skilled in the art all can understand, do variation possible on any form or the details according to the utility model claim, all do not break away from spirit and scope that the utility model patent contains.

Claims

1. engine cooling system Water temp controller structure, it is characterized in that: set up two temperature control valves, by the characteristic of expanding with heat and contract with cold, the position that changes valve head is to regulate the assignment of traffic of cooling water expansion tank, wherein, cylinder head water jacket (12) at engine locates to set up first temperature control valve (11), sets up second temperature control valve (15) between cylinder body water jacket (14) and cylinder head water jacket (12).

2. engine cooling system Water temp controller structure according to claim 1, wherein, this first temperature control valve (11) can be arranged in the cylinder head (1), also can be arranged on to be connected on the outer pipeline of cylinder head water jacket (12).

3. engine cooling system Water temp controller structure according to claim 1, wherein, this second temperature control valve (15) is arranged on the cylinder body (2), also can be arranged on to be connected on the outer pipeline of cylinder body (2).

4. engine cooling system Water temp controller structure according to claim 1, wherein, this first temperature control valve (11) can be cured or the composite metal material with the material of second temperature control valve (15).