Hybrid power engine and motor vehicle
By introducing a compressed air supply device into the methanol engine, the problem of difficult starting of the methanol engine in low-temperature environments has been solved, achieving efficient and clean operation of the engine and improving combustion efficiency and energy utilization efficiency.
Patent Information
- Application Number
- CN202511085778.1
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-08-04
- Publication Date
- 2025-11-28
AI Technical Summary
Methanol fuel does not readily volatilize at low temperatures, making injection difficult, which affects combustion and start-up performance. Furthermore, the large spray particles result in poor combustion efficiency.
A compressed air supply device is introduced into the hybrid engine to drive the piston movement to start the engine. The engine is then driven by adjusting the fuel supply device and ignition device through the controller, thus achieving pneumatic engine start-up. The engine then switches to methanol fuel combustion mode.
Achieving smooth engine start-up in low-temperature environments improves fuel combustion efficiency, enhances energy utilization efficiency, reduces emissions and requirements on turbocharger systems, and enables efficient and clean applications.
Smart Images
Figure CN121024786A_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present disclosure belongs to the technical field of engines, and particularly relates to a hybrid engine and a motor vehicle. BACKGROUND
[0002] Methanol fuel is not easy to evaporate in a low-temperature environment due to its low vapor pressure. Related research results show that when the ambient temperature is lower than 16 DEG C, methanol fuel does not evaporate. Moreover, methanol fuel has the physical and chemical properties of large latent heat of vaporization, and will absorb a large amount of heat in the engine cylinder when injected, further reducing the temperature in the engine cylinder, making it difficult for the injected methanol fuel to evaporate, ultimately failing to form a combustible mixture, affecting the combustion performance and emission performance of the methanol engine. In a low-temperature environment, a spark-ignition methanol engine is prone to difficult starting. In addition, under low load conditions, the injection pressure of methanol fuel is low, and the spray particles are large, resulting in poor combustion efficiency. SUMMARY
[0003] The present disclosure provides a hybrid engine and a motor vehicle, aiming to at least partially solve the technical problem of difficult starting of a methanol engine in a low-temperature environment in the related art.
[0004] At least one embodiment of the present disclosure provides a hybrid engine, comprising:
[0005] an engine cylinder, the engine cylinder being provided with an ignition device and a piston closely fitted with a cylinder wall of the engine cylinder, the piston serving as an output power transmission assembly of the hybrid engine;
[0006] a fuel supply device, the fuel supply device storing methanol fuel, and the fuel supply device being coupled with a first intake port of the engine cylinder; and
[0007] a compressed air supply device, the compressed air supply device being coupled with a second intake port of the engine cylinder;
[0008] wherein, when the hybrid engine is started, the compressed air supply device is started, the fuel supply device and the ignition device are closed, so that the piston is driven to reciprocate by compressed air provided by the compressed air supply device, so that the hybrid engine outputs a first power.
[0009] In the hybrid engine provided by at least one embodiment of the present disclosure, the hybrid engine further comprises a controller configured to:
[0010] Upon receiving the engine start instruction, a pre-set engine start procedure is executed, wherein the engine start procedure is configured to control the compressed air supply device to start, the fuel supply device and the ignition device to shut down, and the hybrid engine to start in a pneumatic manner; and
[0011] Upon starting of the hybrid engine, in response to receiving an engine running instruction, a pre-set engine running procedure is executed, wherein the engine running procedure is configured to adjust the states of the fuel supply device, the compressed air supply device and the ignition device based on the engine speed and engine torque of the hybrid engine, so that the methanol fuel particles ejected by the fuel supply device do not exceed a set size and the actual output power of the hybrid engine matches the required power.
[0012] In the hybrid engine provided by at least one embodiment of the present disclosure, the engine start procedure comprises:
[0013] identifying whether the fuel supply device and the ignition device are both in a shut-down state;
[0014] if yes, controlling the compressed air supply device to start; and
[0015] if no, controlling the fuel supply device or the ignition device that is not shut down to shut down, and issuing a pre-warning when the fuel supply device or the ignition device cannot be shut down.
[0016] In the hybrid engine provided by at least one embodiment of the present disclosure, when the hybrid engine starts, the controller is further configured to:
[0017] obtaining an ambient temperature in which the hybrid engine is located; and
[0018] when the ambient temperature is lower than a set temperature, issuing first notification information for representing that the hybrid engine enters a cold start mode.
[0019] In the hybrid engine provided by at least one embodiment of the present disclosure, the engine running procedure comprises:
[0020] obtaining an engine speed and an engine torque of the hybrid engine;
[0021] When the engine speed is lower than a first set speed, or when the engine speed is higher than a second set speed and the engine torque is less than a first set torque, the fuel supply device and the ignition device are controlled to shut off. The control parameters of the compressed air supply device are adjusted based on the current engine power demand, causing the hybrid engine to output a second power, wherein the first set speed is less than or equal to the second set speed; and...
[0022] When the engine speed is higher than the second set speed and the engine torque is greater than the second set torque, the fuel supply device is started, the ignition device is ignited, and the control parameters of the compressed air supply device and the fuel supply device are adjusted based on the current engine power demand, so that the hybrid engine outputs a third power, wherein the first set torque is less than or equal to the second set torque.
[0023] In a hybrid power engine provided in at least one embodiment of this disclosure, after the hybrid power engine is started, the controller is further configured to:
[0024] When the engine speed is lower than a first set speed, or when the engine speed is higher than a second set speed and the engine torque is less than a first set torque, a second notification message is issued to indicate that the hybrid engine is in aerodynamic mode; and,
[0025] When the engine speed is higher than the second set speed and the engine torque is greater than the second set torque, a third notification message is issued to indicate that the hybrid engine is in hybrid mode.
[0026] In at least one embodiment of the hybrid power engine provided in this disclosure, the compressed air supply device includes:
[0027] A compressed air storage device, wherein the compressed air storage device stores compressed air, and the pressure of the compressed air is greater than 10 standard atmospheres;
[0028] A compressed air nozzle, the compressed air nozzle being disposed in the engine cylinder; and...
[0029] A compressed air pipeline, one end of which is connected to the compressed air storage device, and the other end of which is connected to the compressed air nozzle.
[0030] In at least one embodiment of the hybrid engine provided in this disclosure, the compressed air supply device further includes:
[0031] A compressed air rail is provided for mounting a plurality of the compressed air nozzles, and one end of the compressed air rail is connected to the other end of the compressed air pipeline.
[0032] A solenoid valve, disposed in the compressed air pipeline, is used to control the timing and quantity of compressed air injection; and,
[0033] A heating device is provided in the compressed air pipeline to heat the compressed air entering the engine cylinder to a level above the flash point of methanol.
[0034] In a hybrid engine provided in at least one embodiment of this disclosure, the engine cylinder includes a cylinder head, the fuel supply device includes a plurality of methanol nozzles, and the plurality of methanol nozzles and the plurality of compressed air nozzles are all integrated on the cylinder head.
[0035] At least one embodiment of this disclosure also provides a motor vehicle, the motor vehicle including the hybrid engine provided as in any embodiment of this disclosure.
[0036] The embodiments of this disclosure provide a hybrid power engine and motor vehicle that, compared to related technologies, innovatively add a compressed air supply device to the methanol engine architecture, successfully upgrading the original single-power methanol engine into a pneumatic-methanol internal combustion hybrid power engine. This enables a dual-mode operation of air and methanol, improving the combustion efficiency of methanol fuel. During engine startup, only the compressed air supply device is activated. This upgrade not only expands the engine's power sources but also optimizes its operating mode, effectively solving the technical problem of methanol engines struggling to start in low-temperature environments, allowing the hybrid power engine to start smoothly in cold conditions. After engine startup, the high-pressure compressed air injected into the engine cylinders increases the airflow within the cylinders. During engine operation, the methanol spray mixes rapidly and evenly under the disturbance of the airflow, improving fuel efficiency. The hybrid power engine can flexibly switch power supply modes under different operating conditions, improving energy utilization efficiency, reducing methanol engine emissions and the requirements for the turbocharger system, achieving efficient and clean applications. It is expected to improve performance while reducing energy consumption and emissions, bringing new development directions and application prospects to the field of power systems.
[0037] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit this disclosure. Attached Figure Description
[0038] To more clearly illustrate the technical solutions in the embodiments of this disclosure, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this disclosure. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0039] Figure 1 A schematic diagram of the composition of a hybrid power engine provided for at least one embodiment of this disclosure;
[0040] Figure 2 A schematic diagram of the composition of another hybrid power engine provided for at least one embodiment of this disclosure;
[0041] Figure 3 A schematic diagram illustrating the composition of yet another hybrid power engine provided for at least one embodiment of this disclosure;
[0042] Figure 4 A schematic diagram of the engine operation process during the operation of a hybrid engine provided in at least one embodiment of this disclosure;
[0043] Figure 5 A schematic diagram of the operating mode of a hybrid engine provided in at least one embodiment of this disclosure;
[0044] Figure 6 This is a structural block diagram of a motor vehicle provided for at least one embodiment of the present disclosure.
[0045] Figure Labels
[0046] 1-Motor vehicle; 100-Hybrid power engine; 10-Engine cylinder; 20-Fuel supply device; 30-Compressed air supply device; 101-Ignition device; 102-Piston; 201-Methanol storage device; 202-Methanol rail; 203-Methanol nozzle; 301-Compressed air storage device; 302-Compressed air nozzle; 303-Compressed air rail; 304-Compressed air pipeline; 305-Solenoid valve. Detailed Implementation
[0047] The present disclosure will be further described in detail below with reference to the accompanying drawings and embodiments. It should be particularly noted that the following embodiments are for illustrative purposes only and do not limit the scope of the disclosure. Similarly, the following embodiments are only some, not all, embodiments of the present disclosure, and all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this disclosure.
[0048] The terms "first," "second," and "third" used in the embodiments of this disclosure are for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first," "second," and "third" may explicitly or implicitly include at least one of that feature.
[0049] In the description of this disclosure, "multiple" means at least two, such as two or three, unless otherwise expressly and specifically limited.
[0050] In this disclosure, the terms "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this disclosure. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.
[0051] The terms “comprising” and “having”, and any variations thereof, used in this disclosure are intended to cover non-exclusive inclusion. For example, a process, hybrid engine, system, product, or device that includes a series of steps or units is not limited to the steps or units listed, but may optionally include steps or units not listed, or may optionally include other steps or components inherent to such processes, hybrid engines, products, or devices.
[0052] In this disclosure, the term "methanol flash point" refers to the lowest temperature at which a mixture of methanol fuel and air can momentarily ignite upon approaching a flame under specified test conditions. It is one of the important indicators for measuring the flammability of methanol fuel.
[0053] Figure 1 This is a schematic diagram illustrating the composition of a hybrid power engine provided for at least one embodiment of this disclosure. Figure 1 As shown, the hybrid power engine may include an engine cylinder 10, a fuel supply device 20, and a compressed air supply device 30.
[0054] The engine cylinder 10 is equipped with an ignition device 101 and a piston 102 that is tightly fitted with the cylinder wall of the engine cylinder 10. The piston 102 serves as the output power transmission component of the hybrid power engine.
[0055] The fuel supply device 20 stores methanol fuel and is connected to the first air intake of the engine cylinder 10.
[0056] The compressed air supply device 30 stores compressed air and is connected to the second air intake of the engine cylinder 10.
[0057] When the hybrid engine starts, the compressed air supply device 30 is activated, while the fuel supply device 20 and the ignition device 101 are deactivated. The piston 102 is driven by the compressed air supplied by the compressed air supply device 30, so that the hybrid engine outputs the first power.
[0058] It should be noted that the fuel supply device 20 may also include other gases besides methanol fuel, and the embodiments of this disclosure do not limit this. The hybrid engine has two power sources: one is the power driven by the combustion of traditional methanol fuel, which generates mechanical energy by burning methanol fuel to provide continuous and strong power output to the vehicle. In scenarios requiring long-distance driving or high power output, fuel power can ensure stable vehicle power performance. The other is compressed air drive, also known as air single mode. During engine start-up, compressed air provides initial driving force to drive piston 102 to start the hybrid engine. Compressed air, also known as high-pressure air, can be set to, but is not limited to, 20-30 MPa, and the embodiments of this disclosure do not limit this.
[0059] During implementation, when the hybrid engine cold-starts in low-temperature environments, it enters pneumatic mode, also known as air-only mode. In this mode, compressed air directly drives the piston to perform work, eliminating the need for methanol fuel ignition and fundamentally solving the problem of methanol engines' difficulty in starting at low temperatures. In pneumatic mode, compressed air enters engine cylinder 10, the ignition device 101 does not ignite, and the fuel supply device 20 does not provide methanol spray. When the hybrid engine is running, it can be driven by the power generated from traditional methanol fuel combustion, or by the simultaneous activation of the fuel supply device 20 and the compressed air supply device 30. Due to the addition of compressed air drive, it enters hybrid mode, also known as air + methanol dual mode.
[0060] Some embodiments of this disclosure also provide motor vehicles corresponding to the hybrid engine described above.
[0061] The hybrid power engine provided in at least one embodiment of this disclosure is applicable to any existing methanol-fueled engine application scenario, and the embodiments of this disclosure are not limited thereto. For example, the hybrid power engine can be used in methanol-fueled small car engine scenarios to meet the power needs of daily vehicle travel. The hybrid power engine can also be applied to methanol-fueled industrial power generation engine scenarios to provide stable power energy for factories and other locations. The hybrid power engine can also be adapted to methanol-fueled marine engine scenarios to ensure the normal navigation of ships on water.
[0062] Compared to related technologies, the hybrid engine proposed in this disclosure innovatively adds a compressed air supply device 30 to the methanol engine architecture, successfully upgrading the original single-power methanol engine into a pneumatic-methanol internal combustion hybrid engine. This enables dual-mode operation (air + methanol) and improves the combustion efficiency of methanol fuel. During engine startup, only the compressed air supply device 30 is activated. This upgrade not only expands the engine's power sources but also optimizes its operating mode, effectively solving the technical problem of methanol engines struggling to start in low-temperature environments, allowing the hybrid engine to start smoothly in cold conditions. After engine startup, the high-pressure compressed air injected into the engine cylinder 10 increases the airflow within the cylinder. During engine operation, the methanol spray mixes rapidly and evenly under the disturbance of the airflow, improving fuel efficiency. The hybrid engine can flexibly switch power supply modes under different operating conditions, improving energy utilization efficiency, reducing methanol engine emissions and requirements on the turbocharger system, achieving efficient and clean applications. It is expected to improve performance while reducing energy consumption and emissions, bringing new development directions and application prospects to the power system field.
[0063] The primary function of the engine cylinder 10 is to accommodate the movement of the piston 102 and provide space for the combustion process of methanol fuel. The piston 102 reciprocates within the engine cylinder, and this motion is transmitted to external transmission components, such as the crankshaft, via a connecting rod connected to the piston, thus converting linear motion into rotational motion. The top of the engine cylinder and the top of the piston together constitute the combustion chamber. The combustion chamber is the specific location where methanol fuel mixes with air and combustion occurs.
[0064] The main function of the fuel supply device 20 is to continuously, stably, and precisely supply the appropriate amount of fuel to the combustion chamber during engine operation, ensuring the efficient and stable operation of the hybrid engine. Under different engine operating conditions, this device can automatically adjust the methanol fuel supply to meet the engine's fuel requirements.
[0065] The main function of the compressed air supply device 30 is to provide sufficient power to the hybrid engine during engine startup. The compressed air in the compressed air supply device 30 ensures that the hybrid engine receives sufficient and appropriate power at the moment of startup, driving the piston to reciprocate through pneumatic means, thereby enabling the engine to start smoothly and transition to the engine operation stage, ensuring a smooth and efficient startup process.
[0066] In some embodiments, to ensure the combustion effect of methanol fuel, the fuel supply device 20 includes a methanol storage device 201, a methanol rail 202, and a methanol nozzle 203, such as... Figure 2 or Figure 3As shown, the methanol rail 202 is connected to the methanol storage device 201. The methanol nozzle 203 is installed on the methanol rail 202 and located in the engine cylinder. The methanol rail 202 plays a crucial role in transporting methanol throughout the fuel supply system. The methanol nozzle 203 precisely injects the methanol transported from the methanol rail 202 into the engine cylinder 10, thereby enabling the fuel to burn and generate power in the engine. The coordinated operation of these components completes the supply of methanol fuel to the engine.
[0067] In some embodiments, to ensure the hybrid engine can start normally under harsh operating conditions, the compressed air supply device 30 includes a compressed air storage device 301, a compressed air pipeline 304, and a compressed air nozzle 302, such as Figure 2 As shown. A compressed air storage device 301 stores compressed air at a pressure greater than 10 atmospheres. A compressed air nozzle 302 is disposed in the engine cylinder 10. One end of a compressed air line 304 connects to the compressed air storage device 301, and the other end connects to the compressed air nozzle 302. The compressed air nozzle 302 is designed to release compressed air from the compressed air storage device 301 into the engine cylinder 10 as needed during hybrid engine operation. This design aims to improve the performance of the hybrid engine, especially when additional power is required or when insufficient pressure is needed within the engine cylinder 10. To enhance the reliability and durability of the compressed air supply device 30, both the compressed air storage device 301 and the compressed air nozzle 302 are made of high-strength, corrosion-resistant materials. These materials can withstand the high temperatures, high pressures, and vibrations generated during engine operation, ensuring stable operation of the hybrid engine even in harsh environments.
[0068] As an alternative implementation, the compressed air storage device 301 may be a compressed air tank. The tank material must have sufficient strength and toughness to withstand the storage pressure of high-pressure air, while preventing material aging or corrosion due to long-term use or external environmental factors.
[0069] In some embodiments, the ignition device 101 may include a spark plug. When the ignition device is activated, the spark plug generates an electric spark, thereby igniting the combustible mixture in the engine cylinder 10, enabling the hybrid engine to operate normally.
[0070] In some embodiments, to precisely control the timing and amount of compressed air injection, the compressed air supply device 30 further includes a compressed air rail 303, a compressed air pipeline 304, and a solenoid valve 305, such as Figure 3As shown, several compressed air nozzles 302 are installed on the compressed air rail 303. One end of the compressed air pipeline 304 is connected to the compressed air storage device 301, and the other end of the compressed air pipeline 304 is connected to the compressed air rail 303. A solenoid valve 305 is installed in the compressed air pipeline 304 to control the timing and amount of compressed air injection. Figure 3 In the example shown, both methanol fuel and compressed air are injected directly into the cylinder.
[0071] In some embodiments, to further improve the combustion efficiency of methanol fuel, the compressed air supply device 30 also includes a heating device. The heating device is disposed in the compressed air pipeline 304 and is used to heat the compressed air entering the engine cylinder 10 to above the flash point of methanol. The heating device allows the compressed air entering the engine cylinder to reach specific temperature conditions, thereby increasing the methanol atomization performance across various power ranges, especially in the low-power range, enabling more efficient and stable combustion of methanol fuel and improving engine performance.
[0072] In some embodiments, to further create a more uniform air-fuel mixture, the engine cylinder 10 also includes a cylinder head, on which multiple methanol nozzles 203 and multiple compressed air nozzles 302 are integrated. This design causes strong airflow turbulence when compressed air is injected into the engine cylinder 10, allowing the methanol spray to mix rapidly with the air, forming a more uniform air-fuel mixture. This uniform air-fuel mixture helps improve combustion efficiency, reduces unburned methanol, and thus reduces pollutant emissions. A uniform air-fuel mixture ensures a more stable combustion process, reduces combustion fluctuations, and significantly improves engine power and torque output. By optimizing combustion, the engine can release more energy within the same cylinder volume, thereby improving overall performance. Furthermore, this integrated design not only reduces manufacturing costs but also reduces complexity and error rates during assembly.
[0073] In some embodiments, in order to achieve automatic control of the hybrid power engine, the hybrid power engine further includes a controller configured to perform the following steps S10-S20.
[0074] Step S10: After receiving the engine start command, execute the pre-set engine start procedure, wherein the engine start procedure is configured to control the compressed air supply device 30 to start, the fuel supply device 20 and the ignition device 101 to shut down, and drive the hybrid power engine to start pneumatically.
[0075] Step S20: After the hybrid engine starts, in response to receiving the engine operation command, a pre-set engine operation process is executed, wherein the engine operation process is configured to coordinate the state of the fuel supply device 20, the compressed air supply device 30 and the ignition device 101 based on the engine speed and engine torque of the hybrid engine, so that the methanol fuel particles injected by the fuel supply device 20 do not exceed the set size and the actual output power of the hybrid engine matches the required power.
[0076] In step S10, the hybrid power engine is started using a single-mode air pneumatic method. This design aims to use compressed air to get the hybrid power engine running first, avoiding reliance on methanol fuel ignition from the outset and effectively solving the engine cold start problem. Furthermore, in scenarios with high emission requirements during startup, starting pneumatically reduces initial methanol fuel emissions, achieving efficient and clean utilization. In step S20, based on the hybrid power engine's speed and torque, the states of the fuel supply device 20, compressed air supply device 30, and ignition device 101 are coordinated to ensure that the methanol fuel particles injected by the fuel supply device 20 do not exceed a set size, ensuring that the fuel injection state meets the engine's operating requirements. Simultaneously, because the actual output power of the hybrid power engine matches the required power, it ensures efficient operation under different working conditions, meeting the power demands of actual work and avoiding energy waste due to excessive power or insufficient power affecting normal equipment operation. Through the coordinated operation of steps S10-S20, the hybrid power engine achieves its transition from startup to stable operation, meeting the working requirements at different stages and achieving performance goals in terms of efficiency, stability, and environmental protection.
[0077] In some embodiments, in order to ensure the safe start of the hybrid engine, the engine start process in step S10 is refined into the following sub-steps S101-S103.
[0078] Sub-step S101: Identify whether both the fuel supply device 20 and the ignition device 101 are in the off state.
[0079] Sub-step S102: If so, start the compressed air supply device 30.
[0080] Sub-step S103: If not, control the unclosed fuel supply device 20 or ignition device 101 to shut down, and issue a warning if the fuel supply device 20 or ignition device 101 cannot be shut down.
[0081] Sub-step S101 is the initial judgment step in the engine start-up process. Its purpose is to confirm whether the initial states of the two key components, fuel supply device 20 and ignition device 101, are both closed. If they are in the open state, directly starting the engine may cause safety problems or abnormal operation, so this judgment is a crucial basis for subsequent operations. When sub-step S101 concludes that both fuel supply device 20 and ignition device 101 are in the closed state, sub-step S102 is executed, controlling the compressed air supply device 30 to start, pushing the piston to move, etc., providing the necessary power support for a smooth engine start. When sub-step S101 concludes that not both fuel supply device 20 and ignition device 101 are in the closed state, i.e., at least one is in the open state, step S103 is executed, first controlling the open fuel supply device 20 or ignition device 101 to close, this is to ensure that all components are in a safe initial state before engine start. If the fuel supply device 20 or ignition device 101 fails to shut off, an early warning will be issued to promptly notify relevant personnel of potential hazards so that appropriate measures can be taken to prevent an accident from occurring.
[0082] In some embodiments, in order to facilitate the operation and maintenance of the hybrid engine by the operator, the controller is further configured to perform the following steps S01-sub-step S02 before or during the engine start-up process.
[0083] Step S01: Obtain the ambient temperature of the hybrid engine.
[0084] Step S02: When the ambient temperature is lower than the set temperature, issue a first notification message to indicate that the hybrid engine has entered the cold start mode.
[0085] Accurate ambient temperature data must be obtained in step S01 before step S02, which involves temperature-based judgment, can proceed. The first notification information in step S02 indicates that the hybrid engine has entered cold start mode, and is used to determine and provide information about the engine's start-up mode under specific temperature conditions. This first notification information is crucial for operators because the engine's operating characteristics and maintenance requirements may differ from those in normal start-up mode. Operators can take appropriate operational or maintenance measures based on this information. Through the close coordination of these two steps, the entire process achieves intelligent judgment and information prompts for the hybrid engine's start-up mode based on ambient temperature.
[0086] Figure 4 This is a schematic diagram of the engine operation process during the operation of a hybrid engine provided in at least one embodiment of this disclosure. To improve the spray performance of the methanol engine under various operating conditions, such as... Figure 4As shown, the engine operation process in step S20 is further refined into the following sub-steps S201-S203.
[0087] Sub-step S201: Obtain the engine speed and engine torque of the hybrid engine.
[0088] Sub-step S202: When the engine speed is lower than the first set speed, or the engine speed is higher than the second set speed and the engine torque is less than the first set torque, control the fuel supply device 20 and the ignition device 101 to shut off, and adjust the control parameters of the compressed air supply device 30 based on the current engine power demand, so that the hybrid engine outputs the second power, wherein the first set speed is less than or equal to the second set speed.
[0089] Sub-step S203: When the engine speed is higher than the second set speed and the engine torque is greater than the second set torque, control the fuel supply device 20 to start, control the ignition device 101 to ignite, and adjust the control parameters of the compressed air supply device 30 and the fuel supply device 20 based on the current engine power demand, so that the hybrid engine outputs a third power, wherein the first set torque is less than or equal to the second set torque.
[0090] Among them, the engine speed and engine torque obtained in sub-step S201 are crucial for subsequent judgment of the engine's operating status and the corresponding operating measures. They are the basic data inputs for the entire control logic.
[0091] When the engine speed is lower than the first set speed (i.e., the hybrid engine is operating in the low-speed range), or when the engine speed is higher than the second set speed and the engine torque is less than the first set torque (i.e., the hybrid engine is operating in the high-speed, low-torque range), step S202 is executed, entering the air-only pneumatic mode. At this time, the fuel supply device 20 and ignition device 101 are shut off, and the control parameters of the compressed air supply device 30, such as the air injection quantity, are adjusted according to the current engine power demand. The purpose of sub-step S201 is to allow the hybrid engine to output secondary power in the low-power range. It should be noted that in the low-speed or high-speed, low-torque ranges, to address the problem of poor methanol fuel atomization performance in the low-power range, high-pressure compressed air directly drives the piston 102, which can effectively solve the problem of poor methanol fuel atomization performance in the low-power range and also solve the emission problem. In this operating mode, compressed air enters the engine cylinder 10, the ignition device 101 does not ignite, and the methanol supply device does not supply methanol.
[0092] When the engine speed exceeds the second set speed and the engine torque exceeds the second set torque, meaning the hybrid engine is operating in the high-speed, high-torque range, step S203 is executed, entering the air + methanol dual-mode hybrid mode. High-pressure air injection and methanol injection combine to effectively solve the problem of poor spray performance. In air + methanol dual-mode, compressed air and methanol fuel enter engine cylinder 10, and the ignition device ignites. Through sub-steps S201-S203, refined control of the hybrid engine under different operating conditions is achieved. Based on different combinations of parameters such as engine speed and torque, the operating states of each device are rationally adjusted to meet the engine's different power output requirements. The aforementioned speed and torque setting relationship is a crucial premise of this control logic, defining the engine's operating mode switching conditions under different speed and torque ranges.
[0093] It should be noted that using a compressed air supply device, compared to related technologies that use a turbocharger in the intake air path, can significantly improve the spray performance of a hybrid engine. This is because the pressure ratio of a turbocharger is typically several times that of atmospheric pressure, while compressed air is tens of times that of atmospheric pressure, thus resulting in a more uniform mixing process.
[0094] In some embodiments, in order to better manage and control the operating mode of the hybrid engine, the controller is also configured to perform the following steps S30 and S40 while executing the engine operation process.
[0095] Step S30: When the engine speed is lower than the first set speed, or the engine speed is higher than the second set speed and the engine torque is less than the first set torque, issue a second notification message to indicate that the hybrid engine is in aerodynamic mode.
[0096] Step S40: When the engine speed is higher than the second set speed and the engine torque is greater than the second set torque, issue a third notification message to indicate that the hybrid engine is in hybrid mode.
[0097] Step S30 sets two conditions for triggering the second notification message. The first condition is that the engine speed is lower than a first set speed; the second condition is that the engine speed is higher than a second set speed and the engine torque is lower than a first set torque. If either of these conditions is met, the controller will issue a second notification message indicating that the hybrid engine is in aerodynamic mode, signifying that the hybrid engine has entered a low-power mode. Step S40 sets the conditions for triggering the third notification message. This step specifies that when the engine speed is higher than a second set speed and the engine torque is greater than a second set torque, the controller will issue a third notification message indicating that the hybrid engine is in hybrid mode, signifying that the hybrid engine has entered a high-power mode. Through steps S30 and S40, the controller can accurately determine the mode of the hybrid engine based on different combinations of engine speed and torque, and issue corresponding notification messages. This provides important information for the coordinated operation of the entire system and for operators to understand the engine status, helping to better manage and control the operating mode of the hybrid engine and improve system operating efficiency and stability.
[0098] Figure 5 This is a schematic diagram illustrating the operating modes of a hybrid engine provided in at least one embodiment of this disclosure. Figure 5 As shown, during engine operation, this hybrid engine has two power modes. The first is pneumatic mode, also known as air-only mode, which is used when the hybrid engine is in a low-power state. The second is hybrid mode, also known as air + methanol dual mode, which is used when the hybrid engine is in a high-power state. The switching between these two modes can be determined based on engine speed and engine torque, as shown in sub-steps S201-S203.
[0099] Figure 6 This is a structural block diagram of a motor vehicle provided for at least one embodiment of the present disclosure. For example... Figure 6 As shown, the motor vehicle 1 includes a hybrid power engine 100 as described in the above embodiment.
[0100] Although embodiments of the present disclosure have been shown and described above, it is to be understood that the above embodiments are exemplary and should not be construed as limiting the present disclosure. Those skilled in the art can make changes, modifications, substitutions and variations to the above embodiments within the scope of the present disclosure.
Claims
1. A hybrid power engine, characterized in that, include: An engine cylinder, wherein the engine cylinder is provided with an ignition device and a piston that fits tightly with the cylinder wall of the engine cylinder, the piston serving as the output power transmission component of the hybrid engine; A fuel supply device storing methanol fuel and connected to the first air intake of the engine cylinder; and, A compressed air supply device, wherein the compressed air supply device is connected to the second air inlet of the engine cylinder; When the hybrid engine starts, the compressed air supply device is activated, while the fuel supply device and the ignition device are deactivated, so that the piston is driven to reciprocate by the compressed air supplied by the compressed air supply device, thereby enabling the hybrid engine to output the first power.
2. The hybrid power engine according to claim 1, characterized in that, The hybrid power engine also includes a controller, which is configured to: Upon receiving an engine start command, a pre-set engine start procedure is executed, wherein the engine start procedure is configured to control the compressed air supply device to start, the fuel supply device and the ignition device to shut down, thereby pneumatically driving the hybrid engine to start; and, After the hybrid engine starts, in response to receiving an engine operation command, a pre-set engine operation process is executed, wherein the engine operation process is configured to coordinately adjust the states of the fuel supply device, the compressed air supply device, and the ignition device based on the engine speed and engine torque of the hybrid engine, so that the methanol fuel particles injected by the fuel supply device do not exceed a set size and the actual output power of the hybrid engine matches the required power.
3. The hybrid power engine according to claim 2, characterized in that, The engine start-up process includes: Identify whether both the fuel supply device and the ignition device are in the off state; If so, the compressed air supply device is activated; and, If not, shut down the fuel supply device or the ignition device that is not shut down, and issue a warning if the fuel supply device or the ignition device cannot be shut down.
4. The hybrid power engine according to claim 3, characterized in that, When the hybrid engine starts, the controller is also configured to: Obtain the ambient temperature of the hybrid engine; and, When the ambient temperature is lower than the set temperature, a first notification message is issued to indicate that the hybrid engine has entered the cold start mode.
5. The hybrid power engine according to claim 2, characterized in that, The engine operation process includes: Obtain the engine speed and engine torque of the hybrid engine; When the engine speed is lower than a first set speed, or when the engine speed is higher than a second set speed and the engine torque is less than a first set torque, the fuel supply device and the ignition device are controlled to shut off, and the control parameters of the compressed air supply device are adjusted based on the current engine power demand, so that the hybrid engine outputs a second power, wherein the first set speed is less than or equal to the second set speed; and, When the engine speed is higher than the second set speed and the engine torque is greater than the second set torque, the fuel supply device is started, the ignition device is ignited, and the control parameters of the compressed air supply device and the fuel supply device are adjusted based on the current engine power demand, so that the hybrid engine outputs a third power, wherein the first set torque is less than or equal to the second set torque.
6. The hybrid power engine according to claim 5, characterized in that, After the hybrid engine starts, the controller is further configured to: When the engine speed is lower than the first set speed, or when the engine speed is higher than the second set speed and the engine torque is less than the first set torque, a second notification message is issued to indicate that the hybrid engine is in aerodynamic mode. as well as, When the engine speed is higher than the second set speed and the engine torque is greater than the second set torque, a third notification message is issued to indicate that the hybrid engine is in hybrid mode.
7. The hybrid power engine according to any one of claims 1-6, characterized in that, The compressed air supply device includes: A compressed air storage device, wherein the compressed air storage device stores compressed air, and the pressure of the compressed air is greater than 10 standard atmospheres; A compressed air nozzle, the compressed air nozzle being disposed in the engine cylinder; and... A compressed air pipeline, one end of which is connected to the compressed air storage device, and the other end of which is connected to the compressed air nozzle.
8. The hybrid power engine according to claim 7, characterized in that, The number of compressed air nozzles is multiple, and the compressed air supply device further includes: A compressed air rail is provided for mounting a plurality of the compressed air nozzles, and one end of the compressed air rail is connected to the other end of the compressed air pipeline. A solenoid valve, disposed in the compressed air pipeline, is used to control the timing and quantity of compressed air injection; and, A heating device is provided in the compressed air pipeline to heat the compressed air entering the engine cylinder to a level above the flash point of methanol.
9. The hybrid power engine according to claim 7, characterized in that, The engine cylinder includes a cylinder head, and the fuel supply device includes multiple methanol nozzles, wherein the multiple methanol nozzles and the multiple compressed air nozzles are all integrated on the cylinder head.
10. A motor vehicle, characterized in that, The motor vehicle includes a hybrid engine as described in any one of claims 1 to 9.