The automobile engine cooling water circulatory system
Technical field
The invention belongs to technical field of engines, relate to a kind of engine-cooling system, particularly a kind of automobile engine cooling water circulatory system.
Background technique
The haulage vehicle that the former finger of automobile is used as power with inflammable gas also refers to have and self equips power-actuated vehicle.Motor (Engine) be a kind of can being converted into of other form another kind of can machine, normally be converted into mechanical energy to chemical energy.The motivational drive of automobile is former to be motor.
The cooling system of motor is in order to guarantee that component such as motor, speed changer are operated under the optimum temperature environment; In order to reduce engine cooling water distribute heat, optimized combustion, reduction mechanical wear, the optimum operating temperature of motor is in 110-130 ℃ of interval now.
Motor is lower than the optimum working temperature operation can cause wearing and tearing increase, incomplete combustion, carbon distribution, problems such as discharging is abominable, the piston air leak amount increases, acceleration oil ageing, burn oil, lack of lubrication.After general engine body temperature reaches 40-60 ℃, but motor ability small-power output operation.According to statistics, 90% wearing and tearing come from cold starting and cold operation stage in the using process of motor, and the hot machine time is huge to the durability influence of motor.
All need the hot machine of the slow-speed of revolution after the engine start; Temperature more the hot machine of the low country time long more, as shown in Figure 2, at present motor all generally is equipped with thermostat; Its effect is before the temperature of car also reaches normal temperature, not to be in closed condition; At this moment the cooling liquid of motor is carried out short circle in the motor through the water pump return engine, plays letting motor be rapidly heated.After surpassing normal temperature, just can open, let cooling liquid carry out major cycle through whole radiator of water tank loop, thus quick heat radiating.
In order to solve the technical problem of above-mentioned existence, the someone has designed a kind of preheating system for engine [Chinese patent number: 200810226085.X; Notice of authorization number: CN101737220A], on the former vehicle cooling water circulatory system, increase a cool-bag, be used for preserving the high-temperature cooling water of cooled engine in the vehicle operating process, increase an electronic pipeline water pump and supply water to motor short circle passage.Solenoid valve on the preheating pipeline is opened; Pipeline pump working on the preheating pipe is delivered to the high-temperature cooling water of storing in the cool-bag in the engine water jacket, obviously is the high-temperature cooling water of cool-bag is mixed with low-temperature cooling water in the engine water jacket; Though improved the temperature of cooling water in the engine water jacket like this; Played the effect of warm-up the engine, but this temperature can be lower than optimum operating temperature more out and away well below the temperature of the high-temperature cooling water of former cool-bag; Exist the problem of pre-heat effect difference thus.
Summary of the invention
The objective of the invention is to have the problems referred to above, proposed a kind of ability and solved the automobile engine cooling water circulatory system of utilizing high-temperature cooling water warm-up the engine pre-heat effect difference to existing technology.
The object of the invention can be realized through following technical proposal: a kind of automobile engine cooling water circulatory system, comprise engine water jacket, and the water inlet of described engine water jacket is in series with water pump; It is characterized in that the water outlet place of described engine water jacket is in series with the solenoid valve one that has three water outlets and three at least; Parallel connection is provided with cool-bag, connecting pipe and radiator between the water outlet of the water intake of described water pump and solenoid valve one; The water intake of described cool-bag, connecting pipe and radiator is connected with solenoid valve one Different control position; The water outlet of described cool-bag, connecting pipe and radiator all links with the water intake of water pump; This circulatory system also comprises the control gear according to engine water jacket temperature control electromagnetic valve one.
The principle of this automobile engine cooling water circulatory system is to utilize cool-bag to store high-temperature cooling water, when ato unit, above-mentioned high-temperature cooling water is replaced the normal temperature cooling water in the engine water jacket; Form the short circle water route again.
In the above-mentioned automobile engine cooling water circulatory system, the volume of described cool-bag is slightly larger than the volume of engine water jacket.
In the above-mentioned automobile engine cooling water circulatory system, the water outlet of described cool-bag links through having two water intakes and two solenoid valve two and the water intake of water pump at least; The water outlet of described connecting pipe links through the water intake of described solenoid valve two with water pump; The water outlet of described cool-bag and connecting pipe is connected on the solenoid valve two Different control positions.Solenoid valve two only can make vacuum flask be connected with water pump or connecting pipe is connected with water pump; Can avoid in the short circle water route cooling water in the connecting pipe to get in the vacuum flask thus, and then influence stablizing of cooling water recirculation system.
In the above-mentioned automobile engine cooling water circulatory system, described control gear can also be according to engine water jacket temperature control electromagnetic valve two.Solenoid valve two makes control electromagnetic valve one more convenient with the method for solenoid valve two, unified also through control gear control.
In the above-mentioned automobile engine cooling water circulatory system, described control gear comprises temperature transducer that is arranged in the engine water jacket and the ECU that electrically connects temperature transducer and solenoid valve one.ECU is an Engine ECU, and temperature transducer is transferred to ECU with the temperature value that monitoring obtains, and ECU analyzes the connected state of back control electromagnetic valve one.
In the above-mentioned automobile engine cooling water circulatory system, described solenoid valve two electrically connects with described ECU.The connected state of control electromagnetic valve two simultaneously after ECU analyzes.
In the above-mentioned automobile engine cooling water circulatory system, described solenoid valve one is a 3-position-3-way solenoid valve.
In the above-mentioned automobile engine cooling water circulatory system, described solenoid valve two is the 2/2-way solenoid valve.
Compared with prior art, this automobile engine cooling water circulatory system has the following advantages:
1, this cooling water recirculation system additive decrementation fuel oil is not just practiced thrift and is utilized the heat that dissipated originally in environment, energy-conserving and environment-protective.
2, to directly preheating from inside to outside of engine body, effective.
3, solenoid valve replacement thermostat can be realized accurate control, avoids the coolant temperature fluctuation.
4, the temperature of this cooling water recirculation system warm-up the engine increases substantially, and improves the engine cold starting performance effectively, strengthens the adaptability of car load different regions.
5, this cooling water recirculation system adopts ECU control to meet the development trend of the accuracy controlling of alternate-engine coolant water temperature.
Description of drawings
Fig. 1 is the structural representation of this automobile engine cooling water circulatory system.
Fig. 2 is the structural representation of the existing automobile engine cooling water circulatory system.
Embodiment
Below be specific embodiment of the present invention and combine accompanying drawing, technological scheme of the present invention is done further to describe, but the present invention is not limited to these embodiments.
As shown in Figure 1, this automobile engine cooling water circulatory system comprises engine water jacket, water pump, solenoid valve one, connecting pipe, radiator, cool-bag and control gear.
More particularly, water pump is connected on the water inlet of engine water jacket.The volume of cool-bag is slightly larger than the volume of engine water jacket.
Solenoid valve one has three water outlets and three at least, and the solenoid valve one that present embodiment provides is 3-position-3-way solenoid valve.Solenoid valve one is connected on the water outlet place of engine water jacket.
Cool-bag, connecting pipe and radiator parallel connection are provided with and are arranged between the water outlet of water intake and solenoid valve one of water pump.
The water intake of cool-bag, connecting pipe and radiator is connected with solenoid valve one Different control position; The water outlet of cool-bag, connecting pipe and radiator all links with the water intake of water pump.
According to actual conditions, the water outlet of cool-bag can link through having two water intakes and two solenoid valve two and the water intake of water pump at least; The water outlet of connecting pipe links through the water intake of solenoid valve two with water pump; The water outlet of cool-bag and connecting pipe is connected on the solenoid valve two Different control positions.Solenoid valve two is the 2/2-way solenoid valve.
Control gear can be according to engine water jacket temperature control electromagnetic valve one, can also be according to engine water jacket temperature control electromagnetic valve two.Control gear comprises temperature transducer that is arranged in the engine water jacket and the ECU that electrically connects temperature transducer and solenoid valve one.Solenoid valve two electrically connects with described ECU.
Motor from the cold starting to the proper functioning this automobile engine cooling water circulatory system by following policy control engine warming up: 1, after engine start; The cooling water water temperature that temperature sensor monitors arrives in the control gear is during near atmospheric temperature; All open close high temperature water routes toward radiator of control gear control electromagnetic valve reach the middle warm water road that leads to connecting pipe, and keep unimpeded towards the low temperature water route of vacuum flask; Solenoid valve two is also opened the water route of vacuum flask to water pump; High temperature coolant is pressed into motor in the vacuum flask, and the cryogenic liquid in the engine water jacket is pressed into vacuum flask, realizes that the cooling liquid in engine water jacket and the vacuum flask is switched.
2, switch when accomplishing cooling liquid; The engine water jacket coolant temperature can reach moderate temperature (40 ℃ of summers; 30 ℃ of winters) after, the water route of vacuum flask is led in all open close high temperature water route and cut-outs toward radiator of solenoid valve, and opens the middle warm water road towards connecting pipe; Solenoid valve two is also opened the water route of connecting pipe to water pump; The engine coolant partial circulation operation is realized heating up rapidly.
3, when ECT is higher than normal working temperature; Solenoid valve one and solenoid valve two all are back to the state of above-mentioned pattern 1; Switch to the cryogenic liquid cooled engine in the vacuum flask when utilizing pattern 1 operation, make engine operating temperature remain on normal working temperature.
4, engine coolant persistently overheating (being warming up to about what ℃) needs the radiator cooling this moment, and solenoid valve one cuts off water route that leads to vacuum flask and the middle warm water road that leads to connecting pipe, and opens the high temperature water route towards radiator; Solenoid valve two cuts off the water route that cool-bag leads to water pump, keeps connecting pipe open-minded, utilizes radiator heat-dissipation to make coolant temperature return normal working temperature.
5, a kind of operating mode of constantly switching between the mode 3 and 4.Pattern 4 initial operating stages because of radiator in coolant temperature lower, for avoiding the engine operating temperature fluctuation, can switch mutually with mode 3, guarantee that engine operating temperature slowly changes, and remain in the normal operating temperature scope.Coolant temperature is higher in the vacuum flask when guaranteeing the motor operation; Storing heat to greatest extent; When pattern 4 operations,, switch to the mode 3 operation if after coolant temperature is lower than certain value in the vacuum flask; Temperature is elevated to certain value and switches back pattern 4 again, and the water temperature that remains in the whole circulation water route is even relatively.
Specific embodiment described herein only is that the present invention's spirit is illustrated.Person of ordinary skill in the field of the present invention can make various modifications or replenishes or adopt similar mode to substitute described specific embodiment, but can't depart from spirit of the present invention or surmount the defined scope of appended claims.
Although this paper has used terms such as engine water jacket, water pump, solenoid valve one, connecting pipe, radiator, cool-bag and control gear morely, do not get rid of the possibility of using other term.Using these terms only is in order to describe and explain essence of the present invention more easily; It all is contrary with spirit of the present invention being construed to any additional restriction to them.