CN213928505U

CN213928505U - Device for rapidly improving temperature of engine coolant in low-temperature environment

Info

Publication number: CN213928505U
Application number: CN202022924712.6U
Authority: CN
Inventors: 杨国娟; 张培红; 齐行飞; 张荆一
Original assignee: WEICHAI POWER YANGZHOU DIESEL ENGINE CO Ltd
Current assignee: WEICHAI POWER YANGZHOU DIESEL ENGINE CO Ltd
Priority date: 2020-12-09
Filing date: 2020-12-09
Publication date: 2021-08-10
Anticipated expiration: 2030-12-09

Abstract

The utility model discloses a device of low temperature environment promote engine coolant liquid temperature fast, it is connected with tail pipe including connecting inlet tube and the outlet pipe on the engine, the last exhaust branch that is connected with of tail pipe, the last valve by automatic control device control that is equipped with of exhaust branch, be equipped with on the section that lies in the valve rear on the exhaust branch and carry out the heat exchange structure of heat exchange with the inlet tube. The utility model discloses utilize engine self exhaust heat to heat the coolant liquid of lower temperature, neither need consume other energy and reach energy-conserving purpose, can promote coolant liquid temperature fast again, make the dynamic nature and the economic nature of engine reach the best rapidly, door window and urea case unfreeze fast promotes driver's cabin heating temperature fast.

Description

Device for rapidly improving temperature of engine coolant in low-temperature environment

Technical Field

The utility model relates to a low temperature environment promotes device of engine coolant temperature fast.

Background

The temperature of the cooling liquid in the low-temperature environment rises slowly, and when the cooling liquid of the engine is low, the dynamic property of the engine is poor, and the whole vehicle feels weak in acceleration. The low temperature environment usually needs to bring hot-blast door and give window defrosting and driver's cabin heating by the coolant liquid heat, if the coolant liquid temperature rises slowly, window defrosting and driver's cabin heating are slower, direct influence user's experience is felt. In the SCR technical route, the urea box needs to be electrolyzed and frozen in an environment below-11 ℃, and the temperature of cooling liquid is utilized to thaw after the cooling liquid rises above a certain temperature, so that the thawing process of the urea box is directly influenced by the rising speed of the temperature of the cooling liquid. In the prior art, two modes of an electric heating urea box and an electric heating cooling liquid are mostly adopted, but the electric heating mode can be used for rapidly increasing the temperature of the cooling liquid of an engine, and an electric energy source is adopted for heating, so that energy waste to a certain degree is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a device of low temperature environment promotes engine coolant temperature fast, the device can utilize engine self exhaust heat to heat the coolant liquid of lower temperature, neither need consume other energy and reach energy-conserving purpose, can promote coolant liquid temperature fast again, makes the dynamic property and the economic nature of engine reach the best rapidly, door window and urea case unfreeze fast, promote the driver's cabin heating temperature fast.

For solving above-mentioned technical problem, the device that provides a low temperature environment promotes engine coolant temperature fast, and it is connected with tail pipe, its structural feature lies in including the inlet tube and the outlet pipe of connection on the engine: the exhaust tail pipe is connected with an exhaust branch pipe, a valve controlled by an automatic control device is installed on the exhaust branch pipe, and a heat exchange structure capable of exchanging heat with the water inlet pipe is arranged on the section, located behind the valve, of the exhaust branch pipe.

The heat exchange structure comprises an exhaust branch heating belt which is spirally arranged, and the exhaust branch heating belt is wrapped outside the water inlet pipe.

The outlet end of the water outlet pipe and the water inlet end of the water inlet pipe are connected to the fan heater through a heat exchange structure.

The automatic control device comprises an ECU (electronic control unit) connected to the engine, a water outlet thermometer is arranged on the water outlet pipe and electrically connected with the ECU, an environment thermometer used for detecting an external environment is further electrically connected with the ECU, and the valve is electrically connected with the ECU and is controlled by the ECU to be in an on-off state.

The valve is an electric exhaust butterfly valve.

After adopting above-mentioned structure, when ambient temperature is less than a certain value and coolant temperature is less than a certain value, the valve is opened completely, and when coolant temperature is higher than a certain numerical value, the valve is closed. When the valve is opened, the exhaust gas behind the exhaust tail pipe (SCR box) passes through the exhaust branch pipe, and the heat exchange structure heats the water inlet pipe, so that the temperature of the engine coolant is increased except the normal temperature rise, and the temperature of the coolant is increased rapidly. The friction torque of the engine is reduced due to the rapid rise of the temperature of the cooling liquid, the engine burns to generate a certain internal torque, and more output torque can be provided due to the reduction of the friction torque of the engine, so that the dynamic property and the economical efficiency of the engine can be rapidly optimized. After the temperature of the cooling liquid rises rapidly, heat is provided through the warm air blower, the vehicle window and the urea box are thawed rapidly, and the heating temperature of the cab is increased rapidly. The cooling liquid with lower temperature is heated by utilizing the self exhaust heat of the engine, the aim of saving energy is fulfilled without consuming other energy sources, the temperature of the cooling liquid can be quickly increased, the dynamic property and the economical efficiency of the engine can quickly reach the best, the vehicle windows and the urea box are quickly unfrozen, and the heating temperature of a cab is quickly increased.

Drawings

The invention will be further described with reference to the accompanying drawings:

fig. 1 is a schematic structural diagram of an embodiment of the present invention;

FIG. 2 is a block diagram of a process in operation of the embodiment of FIG. 1.

Detailed Description

As shown in fig. 1, the present invention provides an embodiment of a device for rapidly increasing the temperature of engine coolant in low temperature environment, because the basic structure of the engine is the prior art, the basic structure of the engine is not described in detail herein, and according to the working principle of the engine and the prior art, it is clear to those skilled in the art that the positions of the components mounted on the engine in the embodiment are known, and are not described in detail herein. The frame structure of the engine is shown in the figures and the embodiment, and for the sake of understanding, the prior art and related terms are introduced, the ECU: the electronic control unit, also called "traveling computer" or "vehicle computer", is used for all electrical control of the vehicle and the engine, the water inlet pipe and the water outlet pipe in the following process are circulated with cooling liquid, and the cooling liquid mainly comprises water, antifreeze, additives and other components. The device for rapidly improving the temperature of the engine coolant in the low-temperature environment in the embodiment comprises a water inlet pipe 2 and a water outlet pipe 3 which are connected to an engine 1, wherein the engine 1 is further connected with a fan heater 4, the engine is connected with an exhaust tail pipe 5, the exhaust tail pipe refers to an exhaust pipe section connected to the rear of an SCR (selective catalytic reduction) box, the exhaust tail pipe 5 is connected with an exhaust branch pipe 7, the exhaust branch pipe is connected to the exhaust tail pipe through a three-way joint, a valve 6 controlled by an automatic control device is arranged on the exhaust branch pipe 7, and in the embodiment, the valve 6 is an electric exhaust butterfly valve. The outflow end of the water outlet pipe and the water inlet end of the water inlet pipe are connected to the fan heater 4 through a heat exchange structure in the prior art, for example, the cooling liquid enters a pipe side, and the air of the fan heater enters a shell side, so that the air and the cooling liquid exchange heat, and the specific structure of the fan heater is not described in detail herein.

Referring to fig. 1, a heat exchange structure capable of exchanging heat with the water inlet pipe 2 is provided on a section of the exhaust branch pipe 7 located behind the valve 6. The heat exchange structure comprises an exhaust branch heating belt 71 which is spirally arranged, the exhaust branch heating belt 71 is wrapped outside the water inlet pipe, and the spiral arrangement has the advantages that the exhaust branch heating belt 71 can be tightly wrapped on the water inlet pipe, so that the contact area between the heating belt and the water inlet pipe is increased, and the heat exchange efficiency is improved.

Referring to fig. 1 and 2, the automatic control device comprises an ECU connected to the engine, a water outlet thermometer is mounted on the water outlet pipe and electrically connected with the ECU, the ECU is also electrically connected with an environment thermometer for detecting the external environment, and the valve is electrically connected with the ECU and controlled by the ECU to be in an on-off state. Namely, the operation mechanism of the whole device is as follows: when the ambient temperature is lower than a certain value and the temperature of the cooling liquid is lower than a certain value, the temperature signal is transmitted to the ECU, the valve is controlled to be completely opened through the ECU, and when the temperature of the cooling liquid is higher than a certain value, the valve of the water outlet thermometer is closed. When the valve is opened, the exhaust gas after the tail pipe (SCR tank) passes through the spiral exhaust branch pipe heating belt 71 to heat the engine intake pipe, so that the temperature of the engine coolant rises rapidly under the influence of high-temperature exhaust gas in addition to the normal temperature rise. The friction torque of the engine is reduced due to the rapid rise of the temperature of the cooling liquid, the engine burns to generate a certain internal torque, and more output torque can be provided due to the reduction of the friction torque of the engine, so that the dynamic property and the economical efficiency of the engine can be rapidly optimized. After the temperature of the cooling liquid rises rapidly, heat is provided through the warm air blower, the vehicle window and the urea box are thawed rapidly, and the heating temperature of the cab is increased rapidly

The utility model discloses do not receive the restriction of above-mentioned embodiment, at this technical field personnel, based on the utility model discloses the simple replacement of the equivalent change of concrete structure and method step is all in the protection scope of the utility model.

Claims

1. The utility model provides a device of quick engine coolant temperature that promotes of low temperature environment, is connected with tail pipe, its characterized in that including connecting inlet tube and the outlet pipe on the engine: the exhaust tail pipe is connected with an exhaust branch pipe, a valve controlled by an automatic control device is installed on the exhaust branch pipe, and a heat exchange structure capable of exchanging heat with the water inlet pipe is arranged on the section, located behind the valve, of the exhaust branch pipe.

2. The apparatus for rapidly increasing the temperature of the engine coolant in the low-temperature environment according to claim 1, wherein: the heat exchange structure comprises an exhaust branch heating belt which is spirally arranged, and the exhaust branch heating belt is wrapped outside the water inlet pipe.

3. The apparatus for rapidly increasing the temperature of the engine coolant in the low-temperature environment according to claim 1, wherein: the outlet end of the water outlet pipe and the water inlet end of the water inlet pipe are connected to the fan heater through a heat exchange structure.

4. The apparatus for rapidly increasing the temperature of the engine coolant in a low-temperature environment according to any one of claims 1 to 3, wherein: the automatic control device comprises an ECU (electronic control unit) connected to the engine, a water outlet thermometer is arranged on the water outlet pipe and electrically connected with the ECU, an environment thermometer used for detecting an external environment is further electrically connected with the ECU, and the valve is electrically connected with the ECU and is controlled by the ECU to be in an on-off state.

5. The apparatus for rapidly increasing the temperature of the engine coolant in the low-temperature environment according to claim 4, wherein: the valve is an electric exhaust butterfly valve.