Vehicle catalytic heating system and hybrid vehicle

Abstract

The present disclosure relates to a vehicle catalytic heating system and a hybrid vehicle, and belongs to the technical field of vehicles. In the vehicle catalytic heating system, a catalytic converter is connected to an exhaust port of an engine; a temperature detection module is electrically connected to a control module, used for detecting the temperature inside the catalytic converter and sending the temperature to the control module; a heating module is located between the exhaust port of the vehicle engine and the catalytic converter; the control module is electrically connected to the engine and the heating module, respectively, and is used for: obtaining an electric quantity state value of a vehicle power battery, determining the size of the electric quantity state value and an electric quantity threshold value, determining the size of a temperature and a temperature threshold value, and controlling the heating module to heat and controlling the engine to not start with oil injection in the case that the electric quantity state value is less than the electric quantity threshold value and the temperature is less than the temperature threshold value. By adopting the present disclosure, the catalytic converter can effectively decompose harmful substances in exhaust gas under the cold start condition of the engine, and the vehicle exhaust emission can meet the standard.

Description

TECHNICAL FIELD

[0001] The present disclosure relates to the technical field of vehicles, in particular to a vehicle catalytic heating system and a hybrid vehicle. BACKGROUND

[0002] At present, for a hybrid vehicle, a catalytic converter is usually arranged at the rear end of the exhaust port of the vehicle engine, and the harmful substances in the exhaust gas are decomposed by the catalyst so that the exhaust gas meets the emission standard.

[0003] However, in the cold start working condition of the engine, the temperature difference between the working temperature and the optimum temperature of the catalyst is large due to the low internal temperature of the catalytic converter, which makes the catalytic converter unable to effectively decompose the harmful substances in the exhaust gas, resulting in that the vehicle exhaust emission does not meet the standard. SUMMARY

[0004] The present disclosure provides a vehicle catalytic heating system and a hybrid vehicle, which can solve the technical problems in the related art. The technical solution is as follows:

[0005] In a first aspect, the present disclosure provides a vehicle catalytic heating system, which comprises an engine, a catalytic converter, a temperature detection module, a heating module and a control module.

[0006] The catalytic converter is in communication with the exhaust port of the engine.

[0007] The temperature detection module is electrically connected with the control module, and is configured to detect the temperature inside the catalytic converter and send the temperature to the control module.

[0008] The heating module is located between the exhaust port of the vehicle engine and the catalytic converter.

[0009] The control module is electrically connected with the engine and the heating module, and is configured to:

[0010] obtain an electric quantity state value of a vehicle power battery, determine the size of the electric quantity state value and an electric quantity threshold value, determine the size of the temperature and a temperature threshold value, and control the heating module to heat and control the engine not to start when the electric quantity state value is less than the electric quantity threshold value and the temperature is less than the temperature threshold value.

[0011] In a possible implementation, the control module comprises an engine control unit and a hybrid power control unit which are electrically connected.

[0012] The engine control unit is electrically connected with the temperature detection module, and is configured to:

[0013] receive the temperature sent by the temperature detection module and send the temperature to the hybrid power control unit.

[0014] The hybrid control unit is electrically connected with the engine and the heating module respectively, and is configured to:

[0015] obtain a state of charge value of a vehicle power battery, determine a size of the state of charge value and a charge threshold value, determine a size of the temperature and a temperature threshold value, and control the heating module to heat and control the engine to not start in an oil injection mode in a case that the state of charge value is less than the charge threshold value and the temperature is less than the temperature threshold value.

[0016] In a possible implementation, the hybrid control unit is further configured to:

[0017] In a case that the temperature is greater than or equal to the temperature threshold value and the state of charge value is less than the charge threshold value or, send a start signal to the engine control unit, the start signal being configured to instruct the engine control unit to control the engine to start in the oil injection mode.

[0018] In a possible implementation, the catalytic converter comprises a first-stage catalytic converter and a second-stage catalytic converter connected in communication, the first-stage catalytic converter is connected in communication with an exhaust port of the engine, and the temperature detection module is located between the first-stage catalytic converter and the second-stage catalytic converter.

[0019] In a possible implementation, the heating module comprises a first electrode, a second electrode, and an electric heating disc.

[0020] The first electrode and the second electrode are electrically connected with the power battery respectively.

[0021] In a possible implementation, the control module is electrically connected with the power battery, and is configured to, in a case that the state of charge value is less than the charge threshold value and the temperature is less than the temperature threshold value, control the first electrode and the second electrode to be electrically connected with the electric heating disc respectively.

[0022] In a possible implementation, the vehicle catalytic heating system further comprises a muffler, and the muffler is connected in communication with an exhaust port of the catalytic converter.

[0023] In a possible implementation, the vehicle catalytic heating system further comprises a supercharger, and two ends of the supercharger are connected in communication with an exhaust port of the engine and an air inlet of the catalytic converter respectively.

[0024] In a possible implementation, the charge threshold value is 18%, and the temperature threshold value is 350℃.

[0025] In a second aspect, the embodiments of the present disclosure provide a hybrid vehicle, and the hybrid vehicle comprises the vehicle catalytic heating system in the first aspect and possible implementations thereof.

[0026] The technical solutions provided by the embodiments of the present disclosure have at least the following beneficial effects:

[0027] The vehicle catalytic heating system provided by the embodiments of the present disclosure comprises a catalytic converter and an engine exhaust port. A temperature detection module is electrically connected to the control module and is configured to detect the temperature inside the catalytic converter and send the temperature to the control module. A heating module is located between the engine exhaust port and the catalytic converter. The control module is electrically connected to the engine and the heating module, and is configured to: obtain the state of charge value of the vehicle power battery, determine the size of the state of charge value and the charge threshold value, determine the size of the temperature and the temperature threshold value, and control the heating module to heat and control the engine to not start in the case that the state of charge value is less than the charge threshold value and the temperature is less than the temperature threshold value. In this way, in the cold start working condition of the engine, if the temperature inside the catalytic converter is less than the temperature threshold value, the control module controls the heating module to heat, so that the internal temperature of the catalytic converter rises to the optimum temperature, so that the catalytic converter can effectively decompose harmful substances in the exhaust gas, and ensure that the vehicle exhaust emission meets the standard. Compared with the related art, in the vehicle catalytic heating system provided by the embodiments of the present disclosure, the control module controls the engine to not start and the engine to idle, so that the external air flows to the heating module after passing through the engine, and then enters the catalytic converter to raise the internal temperature of the catalytic converter. Compared with the related art, the vehicle catalytic heating system provided by the embodiments of the present disclosure does not need to be provided with an air pump, and accordingly, an air flow channel does not need to be designed, which can reduce the design difficulty and save the cost.

[0028] It should be understood that the foregoing general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. BRIEF DESCRIPTION OF DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings needed in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present disclosure, and other drawings can be obtained by those skilled in the art without creating laborious work.

[0030] Figure 1 is a structural schematic diagram of a vehicle catalytic heating system according to an embodiment of the present disclosure;

[0031] Figure 2 is a flowchart of controlling the engine to not start according to an embodiment of the present disclosure.

[0032] LEGEND

[0033] 100. power battery

[0034] 1. engine

[0035] 2. catalytic converter

[0036] 21. first stage catalytic converter; 22. second stage catalytic converter; 23. housing

[0037] 3. temperature detection module

[0038] 4. heating module

[0039] 41. first electrode; 42. second electrode; 43. electric heating disc

[0040] 5. control module

[0041] 51. engine control unit; 52. hybrid control unit

[0042] 6. muffler

[0043] 7. supercharger DETAILED DESCRIPTION

[0044] In order to make the objects, technical solutions and advantages of the present disclosure clearer, the following will further describe the embodiments of the present disclosure in conjunction with the accompanying drawings.

[0045] Unless otherwise defined, technical terms or scientific terms used herein should be understood as having the same meaning as commonly understood by one of ordinary skill in the art to which this disclosure belongs. The terms "first", "second", "third" and similar terms used herein do not denote any order, quantity, or importance, but are used to distinguish different components. Similarly, the terms "one" or "a" or similar terms do not denote a quantity restriction, but mean that there is at least one. The terms "include" or "contain" or similar terms mean that the elements or objects appearing before the "include" or "contain" cover the elements or objects listed after the "include" or "contain" and their equivalents, and do not exclude other elements or objects. The terms "connect" or "connected" or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms "up", "down", "left", "right", and the like are only used to indicate relative positional relationships, and when the absolute positions of the described objects change, the relative positional relationships may also change accordingly.

[0046] To adapt to the emission reduction trend, the emission reduction research of hybrid vehicles has become the mainstream of the industry. For hybrid vehicles, a catalyst is usually arranged at the rear end of the exhaust port of the vehicle engine, and the catalyst is used to decompose harmful substances in the exhaust gas, so that the exhaust gas meets the emission standard. In this process, the temperature inside the catalyst needs to be kept near the optimum temperature of the catalyst. In the related technology, a heating disc and an air pump are arranged between the exhaust port of the engine and the air inlet of the catalyst. When the engine is cold started, the air pump works to make external air pass through the heating disc, and the air temperature rises after entering the catalyst, thereby increasing the internal temperature of the catalyst. However, in the above structure, the arrangement of the air pump needs to design an air flow channel additionally, and the arrangement cost is high.

[0047] The embodiment of the present disclosure provides a vehicle catalytic heating system, as shown in Figure 1 Figure 1 is a structural schematic diagram of the vehicle catalytic heating system), which comprises an engine 1, a catalyst 2, a temperature detection module 3, a heating module 4 and a control module 5.

[0048] The catalyst 2 is in communication with the exhaust port of the engine 1. The temperature detection module 3 is electrically connected with the control module 5, and is used to detect the temperature inside the catalyst 2 and send the temperature to the control module 5. The heating module 4 is located between the exhaust port of the vehicle engine 1 and the catalyst 2. The control module 5 is electrically connected with the engine 1 and the heating module 4 respectively, and is used to: acquire an electric quantity state value of a vehicle power battery, determine the size of the electric quantity state value and an electric quantity threshold value, determine the size of the temperature and a temperature threshold value, and control the heating module 4 to heat and control the engine 1 not to start with oil injection in the case that the electric quantity state value is less than the electric quantity threshold value and the temperature is less than the temperature threshold value. The no-oil-injection start means that the engine 1 is in idle operation, and air is delivered to the catalyst 2 without generating exhaust gas generated by gasoline combustion.

[0049] In this way, in the working condition of the cold start of the engine, if the temperature inside the catalyst 2 is less than the temperature threshold value, the control module 5 controls the heating module 4 to heat, so that the internal temperature of the catalyst 2 rises to the optimum temperature, thereby enabling the catalyst to effectively decompose harmful substances in the exhaust gas and ensuring that the vehicle exhaust emission meets the standard.

[0050] In addition, compared with the way of using an additional air pump to promote air to flow into the catalyst 2 in the related technology, in the vehicle catalytic heating system provided by the embodiment of the present disclosure, the control module 5 controls the engine 1 to start without oil injection, and the engine 1 is in idle operation, so that the external air flows to the heating module 4 after passing through the engine 1, and the air temperature rises after entering the catalyst 2, thereby increasing the internal temperature of the catalyst 2. Compared with the related technology, the vehicle catalytic heating system provided by the embodiment of the present disclosure does not need to arrange an air pump, and accordingly, an air flow channel does not need to be designed, which can reduce the design difficulty and save the cost.​

[0051] Figure 2 is a flowchart of a process of controlling the engine to start without fuel injection by the control module 5 according to an embodiment of the present disclosure. Referring to Figure 2 , the process includes:

[0052] In step 101, the SOC of the vehicle power battery is obtained, and the SOC is compared with a power threshold.

[0053] In some possible embodiments, as shown in Figure 1 , the control module 5 includes an engine control unit 51 (ECU) and a hybrid control unit 52 (HCU) electrically connected.

[0054] The engine control unit 51 is electrically connected with the temperature detection module 3, and the hybrid control unit 52 is electrically connected with the engine 1 and the heating module 4 respectively.

[0055] In implementation, the engine control unit 51 is configured to receive the temperature sent by the temperature detection module 3 and send the temperature to the hybrid control unit 52. The hybrid control unit 52 is configured to obtain the SOC of the vehicle power battery, compare the SOC with the power threshold, compare the temperature with a temperature threshold, and control the heating module 4 to heat and control the engine 1 to start without fuel injection when the SOC is less than the power threshold and the temperature is less than the temperature threshold.

[0056] Specifically, the hybrid control unit 52 can be electrically connected with a BMS (Battery Management System) in the hybrid vehicle, and the hybrid control unit 52 obtains power indication information sent by the BMS, wherein the power indication information includes the SOC of the vehicle power battery.

[0057] In an example, the BMS can send the power indication information to the hybrid control unit 52 according to a preset period, which can be 1 second or 0.5 second. The skilled person can set it according to actual needs, and the present disclosure does not limit it.

[0058] In an example, the BMS can send the power indication information to the hybrid control unit 52 when the SOC of the power battery changes, for example, when the SOC of the power battery decreases from 30% to 29%, the BMS sends the power indication information to the hybrid control unit 52.

[0059] In implementation, the hybrid control unit 52 determines the size of the state of charge value and the state of charge threshold value, aiming to avoid the power battery of the vehicle in the state of depletion. The hybrid vehicle includes the extended-range hybrid vehicle and the plug-in hybrid vehicle, wherein the engine in the extended-range hybrid vehicle is only used for power generation to supplement the power battery, and the engine in the plug-in hybrid vehicle is not only used for power generation to supplement the power battery, but also used to output torque to the wheels to drive the vehicle. Whether it is an extended-range hybrid vehicle or a plug-in hybrid vehicle, when the power battery is in a low state of charge, the power battery is in the state of depletion, which has an impact on the service life of the power battery and the overall output power of the battery. Therefore, it is necessary to keep the power battery in a high state of charge, and the minimum state of charge value that keeps the power battery from being in the state of depletion can be used as the state of charge threshold value.

[0060] Exemplarily, the specific value of the state of charge threshold value can be 18%.

[0061] In an example, the hybrid control unit 52 sends a state of charge indication information acquisition signal to the BMS, and the BMS sends the state of charge indication information to the hybrid control unit 52 after receiving the state of charge indication information acquisition signal sent by the hybrid control unit 52.

[0062] In an example, the hybrid control unit 52 can determine the target state of charge threshold value based on the current speed of the vehicle.

[0063] In implementation, when the speed of the vehicle is greater than the speed threshold value, the hybrid control unit 52 can determine the target state of charge threshold value corresponding to the speed range of the speed of the vehicle based on the pre-stored size relationship between the speed range and the state of charge threshold value.

[0064] The hybrid control unit 52 can pre-establish the corresponding relationship between the speed range and the state of charge threshold value and store it. The greater the value corresponding to the speed range, the greater the specific value of the state of charge threshold value. For example, the corresponding relationship between the speed range and the focal length established when the speed threshold value is 40 km / h is shown in Table 1, and Table 1 is only an example. In actual implementation, the related technical personnel can set it themselves:

[0065] Table 1

[0066] Speed range Charge threshold 40 km / h - 50 km / h 18％ 50 km / h - 60 km / h 19％ 60 km / h - 70 km / h 20％ 70 km / h - 80 km / h 21％ 80 km / h - 90 km / h 22％ 95 km / h - 100 km / h 23％

[0067] Step 102, receiving the temperature sent by the temperature detection module 3, and determining the size of the temperature and the temperature threshold value.

[0068] It can be understood that step 102 and step 101 can be performed simultaneously. The order of step 102 and step 101 can be set by the technical personnel according to the actual needs, and the embodiments of the present disclosure do not limit this.

[0069] Specifically, the temperature detection module 3 can be a temperature sensor, and the temperature detection module 3 is electrically connected to the engine control unit 51. The temperature sensor is configured to detect the internal temperature of the catalytic converter 2 and send the temperature to the engine control unit 51. Then, the engine control unit 51 sends the temperature to the hybrid power control unit 52, and the hybrid power control unit 52 compares and determines the size relationship between the internal temperature of the catalytic converter 2 and the temperature threshold.

[0070] Exemplarily, the temperature threshold can be 350℃.

[0071] In an example, after receiving the temperature sent by the temperature detection module 3, the engine control unit 51 can store the specific value of the temperature, and then send the temperature to the hybrid power control unit 52 after completing the storage. The hybrid power control unit 52 receives the temperature sent by the temperature detection module 3 and determines the size of the temperature and the temperature threshold.

[0072] Step 103, in the case that the state of charge value is less than the charge threshold and the temperature is less than the temperature threshold, the heating module is controlled to heat, and the engine is controlled not to start with oil injection.

[0073] In implementation, after obtaining the state of charge value of the vehicle power battery, the hybrid power control unit 52 compares the state of charge value with the preset charge threshold, and compares the size relationship between the state of charge value and the preset charge threshold. At the same time, after obtaining the internal temperature of the catalytic converter 2, the hybrid power control unit 52 compares the temperature with the preset temperature threshold, and compares the size relationship between the temperature and the preset temperature threshold. In the case that the state of charge value is less than the charge threshold and the temperature is less than the temperature threshold, the heating module 4 is controlled to heat, and the engine 1 is controlled not to start with oil injection.

[0074] In this way, the engine 1 does not start with oil injection, that is, the engine 1 idles under the function of the starter, and the external air enters the engine 1 through the air inlet of the engine 1 and flows to the heating module 4 through the air outlet of the engine 1. These flowing air carries the heat provided by the heating module 4 to the inside of the catalytic converter 2, thereby providing the internal temperature of the catalytic converter 2.

[0075] In step 101-102, the hybrid control unit 52 is configured to determine the size of the state of charge value of the power battery and the size of the charge threshold value, and determine the size of the internal temperature of the catalytic converter and the size of the temperature threshold value. In step 103, the hybrid control unit 52 performs the above determination process, and in the case that the above temperature is greater than or equal to the temperature threshold value and the state of charge value is less than the charge threshold value or, the hybrid control unit 52 sends a start signal to the engine control unit 51, and in the case that the above state of charge value is greater than or equal to the charge threshold value or, the hybrid control unit 52 does not send a start signal to the engine control unit 51, and does not control the engine 1 to start without fuel injection.

[0076] The start signal is used to instruct the engine control unit 51 to control the engine 1 to start with fuel injection.

[0077] In implementation, if the hybrid control unit 52 determines that the internal temperature of the catalytic converter 2 is greater than or equal to the temperature threshold value, and the state of charge value of the power battery is less than the charge threshold value, it means that the internal temperature of the catalytic converter 2 is close to the optimal temperature of the catalyst at this time, and the engine can be started directly at this time. Normal, which can ensure that the exhaust emission meets the standard. If the hybrid control unit 52 determines that the state of charge value of the power battery is greater than or equal to the charge threshold value, it means that the remaining power of the power battery of the vehicle is still sufficient at this time, and the power battery will not be in a power shortage mode, so the engine does not need to be started at this time.

[0078] In one possible embodiment, the catalytic converter 2 is a multi-stage catalytic converter.

[0079] As shown in Figure 1 The catalytic converter 2 includes a first-stage catalytic converter 21 and a second-stage catalytic converter 22 connected in communication, the first-stage catalytic converter 21 is connected in communication with the exhaust port of the engine 1, and the temperature detection module 3 is located between the first-stage catalytic converter 21 and the second-stage catalytic converter 22.

[0080] In implementation, the first-stage catalytic converter 21 is configured to catalyze the exhaust gas generated by the engine 1 and decompose harmful substances in the exhaust gas, and the second-stage catalytic converter 22 is configured to capture the number and diameter of particulate matters in the exhaust gas after catalysis by the first-stage catalytic converter 21.

[0081] In this way, the temperature detection module 3 is located between the first-stage catalytic converter 21 and the second-stage catalytic converter 22, when the temperature at the position between the first-stage catalytic converter 21 and the second-stage catalytic converter 22 is greater than or equal to the temperature threshold value, the internal temperature of the first-stage catalytic converter 21 is necessarily greater than the temperature threshold value, that is, the internal temperature of the first-stage catalytic converter 21 is within the optimal temperature range, which can effectively catalyze and decompose harmful substances in the exhaust gas.

[0082] In one example, referring to Figure 1The catalytic converter 2 further comprises a shell 23 having a containing cavity, the first-stage catalytic converter 21 and the second-stage catalytic converter 22 are located in the containing cavity, the second-stage catalytic converter 22 is located on the side of the first-stage catalytic converter 21 away from the exhaust port of the engine 1, and the first-stage catalytic converter 21 and the second-stage catalytic converter 22 are connected with the shell 23 respectively. The temperature detection module 3 is connected with the shell 23, the detection end of the temperature detection module 3 is located in the shell 23 and between the first-stage catalytic converter 21 and the second-stage catalytic converter 22. In this way, the detection accuracy of the temperature detection module 3 can be improved.

[0083] In a possible embodiment, the heating module 4 comprises a first electrode 41, a second electrode 42 and an electric heating disc 43.

[0084] As shown in Figure 1 , the first electrode 41 and the second electrode 42 are electrically connected with the power battery 100 respectively.

[0085] In implementation, when the first electrode 41 and the second electrode 42 are electrically connected with the electric heating disc 43 to form a conductive path, the electric heating disc 43 is in working state, the heating module 4 converts electric energy into heat energy, when the first electrode 41 or the second electrode 42 is not electrically connected with the electric heating disc 43, the electric heating disc 43 is in non-working state.

[0086] In an example, as shown in Figure 1 , the control module 5 is electrically connected with the power battery 100. The control module 5 is used for controlling the first electrode 41 and the second electrode 42 to be electrically connected with the electric heating disc 43 when the electric quantity state value is less than the electric quantity threshold value and the temperature is less than the temperature threshold value.

[0087] In implementation, the hybrid power control unit 52 controls the first electrode 41 and the second electrode 42 to be electrically connected with the electric heating disc 43 when it is determined that the electric quantity state value of the power battery is less than the electric quantity threshold value and the internal temperature of the catalytic converter 2 is less than the temperature threshold value, and converts electric energy into heat energy by using the electric heating disc 43 to heat the air flowing through the heating module 4, so as to improve the internal temperature of the catalytic converter 2.

[0088] In a possible embodiment, the vehicle catalytic heating system further comprises a muffler 6.

[0089] As shown in Figure 1 , the muffler 6 is connected with the exhaust port of the catalytic converter 2. In this way, the noise of the exhaust gas flowing out of the catalytic converter 2 can be reduced, and the user experience can be improved.

[0090] In an example, the catalytic converter 2 comprises the first-stage catalytic converter 21, the second-stage catalytic converter 22 and the shell 23, and the outer wall of the muffler 6 is sealingly connected with the exhaust port of the shell 23. In this way, the leakage of the exhaust gas to the inside of the vehicle body can be avoided.

[0091] Optionally, the muffler 6 can be sealingly connected with one end of a pipe, and the other end of the pipe is sealingly connected with the exhaust port of the housing 23.

[0092] In implementation, the exhaust gas flows out of the exhaust port of the catalyst 2 at a high temperature, and if the exhaust gas at a high temperature directly enters the muffler 6, the muffler 6 can be overheated and fail. Therefore, the pipe is used to connect the muffler 6 with the exhaust port of the housing 23, so as to prolong the service life of the muffler 6.

[0093] The pipe diameter and length of the pipe can be set according to actual needs, and the embodiments of the present disclosure do not limit the pipe diameter and length of the pipe.

[0094] In a possible embodiment, the vehicle catalytic heating system further comprises a supercharger 7.

[0095] As shown in FIG. 4, the two ends of the supercharger 7 are respectively connected with the exhaust port of the engine 1 and the air inlet of the catalyst 2. In this way, the air flow through the heating module 4 can be increased, so that the internal temperature of the catalyst 2 can be rapidly increased. Figure 1 The embodiments of the present disclosure have at least the following beneficial effects:

[0096]

[0097] ​The embodiment of the present disclosure provides a vehicle catalytic heating system, in which a catalytic converter 2 is connected with an exhaust port of an engine 1. A temperature detection module 3 is electrically connected with a control module 5, and is used for detecting the temperature inside the catalytic converter 2 and sending the temperature to the control module 5. A heating module 4 is located between the exhaust port of the vehicle engine 1 and the catalytic converter 2. The control module 5 is electrically connected with the engine 1 and the heating module 4 respectively, and is used for: obtaining an electric quantity state value of a vehicle power battery, determining the size of the electric quantity state value and an electric quantity threshold value, determining the size of the temperature and a temperature threshold value, and controlling the heating module 4 to heat and controlling the engine 1 not to start in the case that the electric quantity state value is less than the electric quantity threshold value and the temperature is less than the temperature threshold value. In this way, in the working condition of cold start of the engine, if the temperature inside the catalytic converter 2 is less than the temperature threshold value, the control module 5 controls the heating module 4 to heat, so that the internal temperature of the catalytic converter 2 rises to the optimum temperature, so that the catalytic converter can effectively decompose harmful substances in the exhaust gas, and the vehicle exhaust emission can meet the standard. Moreover, compared with the method of using an additional air pump to promote air to carry heat into the catalytic converter 2 in the related art, in the vehicle catalytic heating system provided by the embodiment of the present disclosure, the control module 5 controls the engine 1 not to start, and the engine 1 idles, so that the external air flows to the heating module 4 after passing through the engine 1, and the air enters the catalytic converter 2 after the temperature of the air rises, so that the internal temperature of the catalytic converter 2 rises, compared with the related art, the vehicle catalytic heating system provided by the embodiment of the present disclosure does not need to be provided with an air pump, and accordingly, an air flow channel does not need to be designed, so that the design difficulty can be reduced and the cost can be saved.

[0098] The embodiment of the present disclosure provides a hybrid vehicle, which comprises the vehicle catalytic heating system.

[0099] The above only describes optional embodiments of the present disclosure, and does not limit the present disclosure, and any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present disclosure shall be included in the protection scope of the present disclosure.

Claims

1. A catalytic heating system for a vehicle, characterized by, The vehicle catalytic heating system comprises an engine (1), a catalytic converter (2), a temperature detection module (3), a heating module (4) and a control module (5); The catalytic converter (2) is communicated with the exhaust port of the engine (1); The temperature detection module (3) is electrically connected with the control module (5), and is used for detecting the temperature inside the catalytic converter (2) and sending the temperature to the control module (5); The heating module (4) is located between the exhaust port of the engine (1) and the catalytic converter (2); The control module (5) comprises an engine control unit (51) and a hybrid power control unit (52) which are electrically connected; The engine control unit (51) is electrically connected with the temperature detection module (3), and is used for receiving the temperature sent by the temperature detection module (3) and sending the temperature to the hybrid power control unit (52); The hybrid power control unit (52) is electrically connected with the engine (1) and the heating module (4) respectively, and is used for obtaining the state of charge value of the vehicle power battery, determining the size of the state of charge value and the charge threshold value, determining the size of the temperature and the temperature threshold value, and controlling the heating module (4) to heat and controlling the engine (1) not to start in the case that the state of charge value is less than the charge threshold value and the temperature is less than the temperature threshold value.

2. The catalytic heating system for a vehicle according to claim 1, wherein The hybrid power control unit (52) is further used for: In the case that the temperature is greater than or equal to the temperature threshold value and the state of charge value is less than the charge threshold value, sending a start signal to the engine control unit (51), and the start signal is used to instruct the engine control unit (51) to control the engine (1) to start.

3. The catalytic heating system for a vehicle according to claim 1, wherein The catalytic converter (2) comprises a first-stage catalytic converter (21) and a second-stage catalytic converter (22) which are communicated, the first-stage catalytic converter (21) is communicated with the exhaust port of the engine (1), and the temperature detection module (3) is located between the first-stage catalytic converter (21) and the second-stage catalytic converter (22).

4. The catalytic heating system for a vehicle according to claim 1, wherein The heating module (4) comprises a first electrode (41), a second electrode (42) and an electric heating disc (43); The first electrode (41) and the second electrode (42) are electrically connected with the power battery (100) respectively.

5. The catalytic heating system for a vehicle according to claim 4, wherein The control module (5) is electrically connected with the power battery (100), and is used for controlling the first electrode (41) and the second electrode (42) to be electrically connected with the electric heating disc (43) respectively in the case that the state of charge value is less than the charge threshold value and the temperature is less than the temperature threshold value.

6. The catalytic heating system for a vehicle according to claim 1, wherein The vehicle catalytic heating system further comprises a muffler (6), and the muffler (6) is communicated with the exhaust port of the catalytic converter (2).

7. The catalytic heating system for a vehicle according to claim 1, wherein The vehicle catalytic heating system further comprises a supercharger (7), and two ends of the supercharger (7) are communicated with the exhaust port of the engine (1) and the air inlet of the catalytic converter (2) respectively.

8. The catalytic heating system for a vehicle according to any one of claims 1 to 7, characterized by, The charge threshold value is 18%, and the temperature threshold value is 350℃.

9. A hybrid vehicle characterized by comprising: The hybrid vehicle includes the vehicle catalytic heating system as claimed in any one of claims 1 to 8.

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