Vehicle fuel oil warm air control system and vehicle

Abstract

The invention discloses a vehicle fuel oil warm air control system and a vehicle, and belongs to the technical field of vehicle fuel oil warm air control. The vehicle fuel oil warm air control system comprises a warm air supply unit, a fuel oil warm air switch, an air volume control unit, a cab turnover switch, a protection unit and a power supply unit; the power supply unit comprises a plurality of power sources used for providing working current for the warm air supply unit. The fuel oil warm air switch is used for starting or stopping the warm air function of the warm air supply unit, and the air volume control unit is used for controlling the air volume of the warm air supply unit. The cab turnover switch is closed when the cab is in a turnover state or a cab locking state is abnormal; the protection unit is connected between the fuel oil warm air switch and the warm air supply unit, so that the warm air function of the warm air supply unit is started, the air volume is set to a preset level, and when the cab turnover switch is turned off, a circuit between the fuel oil warm air switch and the warm air supply unit is conducted. According to the design of the protection unit, protection of the warm air supply unit under various risk conditions is achieved.

Description

Technical Field

[0001] The present invention relates to a vehicle fuel warm air control system and a vehicle, belonging to the technical field of vehicle fuel warm air control. Background Art

[0002] The currently disclosed fuel warm air control systems mainly focus on the structural composition, precise control of fuel supply and return, temperature control based on ambient temperature or inlet and outlet air temperatures, innovation in aspects such as delayed cooling and preheating utilization, and functional innovation with interlock protection features such as restart after shutdown and sensors not working during shutdown and timely discharging. However, they lack protection against the risk of dry burning in the case of water shortage when the cab is flipped or other abnormal states in the on-vehicle fuel warm air system, resulting in functional deficiencies. Summary of the Invention

[0003] The purpose of the present invention is to provide a vehicle fuel warm air control system and a vehicle, which can achieve the protection of the warm air supply unit under various risk conditions.

[0004] To achieve the above purpose, the present invention is implemented by adopting the following technical solutions: In a first aspect, the present invention provides a vehicle fuel warm air control system, including a warm air supply unit, a fuel warm air switch, an air volume control unit, a cab flip switch, a protection unit, and a power supply unit; The power supply unit includes multiple power sources for providing working current to the warm air supply unit, and a power supply control component capable of conducting or cutting off the circuit between each power source and the warm air supply unit; The fuel warm air switch is used to turn on or off the warm air function of the warm air supply unit, and the air volume control unit is used to control the air volume of the warm air supply unit; the cab flip switch closes when the cab is in a flipped state or the cab locking state is abnormal, and disconnects when the cab is in an unflipped state and the cab locking state is normal; The protection unit is connected between the fuel warm air switch and the warm air supply unit, so that when the preset warm air opening conditions are met, the circuit between the fuel warm air switch and the warm air supply unit is conducted, and when the preset warm air opening conditions are not met, the circuit between the fuel warm air switch and the warm air supply unit is disconnected; the warm air opening conditions include: the warm air function of the warm air supply unit is turned on and the air volume is turned to a preset level, and the cab flip switch is disconnected.

[0005] Further, the power supply unit includes a power supply relay, a constant power supply, and an auxiliary power supply. The power supply control component is a power supply relay. The common terminal contact of the power supply relay is connected to the positive pin of the working power supply of the warm air supply unit. The normally closed contact of the power supply relay is connected to the constant power supply, and the normally open contact of the power supply relay is connected to the auxiliary power supply.

[0006] Further, the warm air supply unit is a water heating main unit.

[0007] Further, the protection unit includes a tipping protection relay and a warm air protection relay; The common terminal contact of the tipping protection relay is connected to the normally open contact on the fuel warm air switch for connecting the warm air supply unit. The common terminal contact of the tipping protection relay is simultaneously connected in parallel with the positive pole of the coil of the tipping protection relay. The negative pole of the coil of the tipping protection relay is connected to one end contact of the cab tipping switch, and the other end contact of the cab tipping switch is grounded. The normally closed contact of the tipping protection relay is connected to the common terminal contact of the warm air protection relay, and the normally open contact of the warm air protection relay is connected to the start signal pin of the warm air supply unit; The positive and negative poles of the coil of the warm air protection relay adopt any one of the following two connection relationships: The first connection relationship: The positive pole of the coil of the warm air protection relay is connected to the auxiliary power supply, and the negative pole of the coil of the warm air protection relay is connected to the air volume control unit; The second connection relationship: The positive pole of the coil of the warm air protection relay is connected to the air volume control unit, and the negative pole of the coil of the warm air protection relay is connected to the ground.

[0008] Further, it also includes a controller. The negative pole of the coil of the tipping protection relay is also connected to the protection pin of the controller, and the controller is used to execute a preset tipping protection relay control method.

[0009] Further, it also includes a first reverse protection diode. The first reverse protection diode is connected between the negative pole of the coil of the tipping protection relay and the protection pin of the controller, and is set to conduct unidirectionally from the negative pole of the coil of the tipping protection relay to the protection pin of the controller.

[0010] Further, the controller is used to receive the vehicle inclination angle and the vehicle driving state. When the vehicle continuously stays in the state of going uphill or downhill at a vehicle inclination angle greater than the preset inclination threshold, and the duration of this state exceeds the preset protection time, the controller outputs a protection signal, causing the tipping protection relay to close, causing the normally closed contact of the tipping protection relay to open, thereby disconnecting the line between the fuel warm air switch and the warm air supply unit.

[0011] Further, the fuel warm air switch includes a first contact circuit and a second contact circuit; The normally open contact of the first contact circuit is grounded, and the common terminal contact is connected to the heating indication pin of the warm air supply unit; The normally open contact of the second contact circuit is the normally open contact on the fuel warm air switch for connecting the warm air supply unit, and the common terminal contact of the second contact circuit is connected to the power supply unit.

[0012] Further, it further includes a second anti-reverse diode, which is connected between the negative pole of the coil of the tipping protection relay and one end contact of the cab tipping switch, and is set to conduct unidirectionally from the negative pole of the coil of the tipping protection relay to one end contact of the cab tipping switch.

[0013] In a second aspect, the present invention provides a vehicle, including a vehicle body and the vehicle fuel warm air control system according to any one of the first aspect. Wherein, the normally closed contact of the power supply relay is connected to the vehicle's constant power supply, the normally open contact of the power supply relay is connected to the vehicle's ACC power supply, the positive pole of the power supply relay is connected to the vehicle's ON power supply, and one end contact of the cab tipping switch that is not connected to the negative pole of the coil of the tipping protection relay is connected to the vehicle ground.

[0014] Compared with the prior art, the beneficial effects achieved by the present invention are as follows: In the vehicle fuel warm air control system provided by the present invention, a post-added protection unit is provided between the fuel warm air switch and the warm air supply unit. And only when the warm air function of the warm air supply unit is turned on, the air volume is turned up to a preset level, and the cab tipping switch is turned off, the circuit between the fuel warm air switch and the warm air supply unit will be conducted. Only at this time can the warm air function of the warm air supply unit be turned on through the fuel warm air switch. Therefore, it can play a protective role in the following risk situations: 1. When the warm air function is not turned on and the air volume is not strong enough, if the independent warm air is turned on, the combustion heat cannot be effectively transferred, which easily leads to overheating of the combustion chamber of the fuel independent warm air, resulting in frequent adjustment of the combustion power, which is likely to lead to low combustion efficiency and an increase in incompletely burned components such as carbon monoxide; 2. When repairing the cab, when the cab is in a tipping state or the locking state of the cab is abnormal, due to the change in the tilt angle and no one in the cab uses the warm air, there is a coolant cavity in the heat conduction space around the combustion chamber at this time, and the heat conduction is insufficient, which easily leads to overheating of the combustion chamber and danger; A controller is also provided. When the vehicle is driving on a long and steep uphill or downhill, there will also be a coolant cavity causing overheating. At this time, the controller outputs a protection signal, causing the tipping protection relay to close, the normally closed contact on the tipping protection relay to open, and the circuit between the fuel warm air switch and the warm air supply unit to disconnect, realizing the protection function.

[0015] The protection unit is set as a reverse protection relay and a warm air protection relay connected in series before and after the contact. This post-added protection method has high adaptability. Using the cab tilt switch as the control and protection method for cab tilt maintenance detection can be flexibly implemented, allowing for retrofitting without changing the original equipment functions, making it more convenient to upgrade the protection function of existing vehicles. Additionally, through the combined action of the cab tilt switch and the protection unit, the protection ability against tilt and overheating is achieved. Multiple reverse protection diodes are set to achieve multiple protections and the function of preventing signal cross-current. In summary, a vehicle fuel warm air control system provided by the present invention has the advantages of convenient retrofitting, without the need to modify the original equipment design, low retrofitting cost, sensitive and effective protection functions, and rich protection-related factors, and can be effective for various protection factors such as cab tilt, vehicle tilt, air volume size, warm air mode, and protection time. Brief Description of the Drawings

[0016] Figure 1 It is a schematic structural diagram of a vehicle fuel warm air control system provided by the embodiment. Detailed Embodiments

[0017] The present invention will be further described below with reference to the drawings. The following embodiments are only used to more clearly illustrate the technical solutions of the present invention and cannot be used to limit the protection scope of the present invention.

[0018] Embodiment 1

[0019] This embodiment provides a vehicle fuel warm air control system, which includes a warm air supply unit, a fuel warm air switch, an air volume control unit, a cab tilt switch, a protection unit, and a power supply unit. The power supply unit includes multiple power sources for providing working current to the warm air supply unit, and a power supply control component capable of conducting or cutting off the lines between each power source and the warm air supply unit. The fuel warm air switch is used to turn on or off the warm air function of the warm air supply unit, and the air volume control unit is used to control the air volume of the warm air supply unit. The cab tilt switch closes when the cab is in a tilted state or the cab locking state is abnormal, and disconnects when the cab is in a non-tilted state and the cab locking state is normal. The protection unit is connected between the fuel warm air switch and the warm air supply unit, such that when the preset warm air opening conditions are met, the line between the fuel warm air switch and the warm air supply unit is conducted, and when the preset warm air opening conditions are not met, the line between the fuel warm air switch and the warm air supply unit is disconnected. The warm air opening conditions include: the warm air function of the warm air supply unit is turned on, the air volume is turned on to a preset level, and the cab tilt switch is disconnected.

[0020] The present invention provides protection by arranging an added protection unit between the fuel warm air switch and the warm air supply unit. Moreover, only when the warm air function of the warm air supply unit is turned on, the air volume is turned to a preset level, and the cab tilting switch is turned off, the circuit between the fuel warm air switch and the warm air supply unit will be conducted. Only then can the warm air function of the warm air supply unit be turned on through the fuel warm air switch. Therefore, it can play a protective role in the following risk situations: 1. When the warm air function is not turned on and the air volume is not strong enough, if the independent warm air is turned on, the combustion heat cannot be effectively transferred, which easily leads to overheating of the combustion chamber of the fuel independent warm air, resulting in frequent adjustment of the combustion power, low combustion efficiency, and increased components such as carbon monoxide due to incomplete combustion; 2. When the cab is being repaired, the cab is in a tilted state, or the cab locking state is abnormal. Due to the change in the tilt angle and no one in the cab using the warm air, there is a coolant cavity in the heat conduction space around the combustion chamber due to the angle tilt at this time, and the heat conduction is insufficient, which easily leads to overheating of the combustion chamber and danger.

[0021] Embodiment 2

[0022] As Figure 1 shown, this embodiment provides a vehicle fuel warm air control system, including a water heating main unit, a warm air protection relay, a tilting protection relay, a cab tilting switch, a controller, a power supply relay, a DC power supply, a first anti-reverse diode, a second anti-reverse diode, and a fuel warm air switch.

[0023] As Figure 1 shown, the pin 1 (working power supply positive pin) of the water heating main unit is connected to the common terminal contact of the power supply relay. The normally closed contact of the power supply relay is connected to the vehicle's constant power supply (directly connected to the power supply terminal of the lead-acid battery, such as 24V in a 24V platform, that is, Figure 1 the constant power supply 24V), and the normally open contact of the power supply relay is connected to the vehicle's DC power supply (the air conditioning system uses DC power as the main working power supply during driving, that is, Figure 1 the ACC 24V in

[0024] As Figure 1 shown, the pin 2 (working power supply negative pin) of the water heating main unit is grounded.

[0025] As Figure 1As shown, the pin 3 (power-on signal pin) of the water heating main unit is connected to the normally open contact of the warm air protection relay. The common terminal contact of the warm air protection relay is connected to the normally closed contact of the tipping protection relay. The positive terminal of the coil of the warm air protection relay is connected to the vehicle's ACC power supply, and the negative terminal of the coil is connected to the warm air knob on the control panel (low control). Or, depending on the high or low control state of the signal from the controller, the high control terminal of the coil is connected to the warm air knob, and the low control terminal is connected to the ground.

[0026] As Figure 1 shown, the common terminal contact of the tipping protection relay is connected to the normally open contact of the second contact circuit of the fuel warm air switch, and is also connected in parallel with the positive terminal of the coil of the tipping protection relay. The common terminal contact of the second contact circuit of the fuel warm air switch is connected to the ACC power supply. The negative terminal of the coil of the tipping protection relay is protected by a first anti-reverse diode and is connected to the contact of the cab tipping switch. The other contact of the cab tipping switch is connected to the vehicle ground (depending on the high or low control design of the cab tipping switch, this case is a low control grounding control design). Another path of the negative terminal of the coil of the tipping protection relay is protected by an independent second anti-reverse diode and is connected to the protection pin of the controller for implementing additional program control logic for protection.

[0027] The additional program control logic is implemented through the following process: During vehicle use, the cab is normally locked, but when the vehicle is in a long-term uphill or downhill driving state on a large slope, overheating may also occur due to coolant cavity. Therefore, another control line is connected in parallel at the negative terminal of the coil of the tipping protection relay, and an anti-crossing diode is also connected in series to the relevant vehicle controller. The controller is equipped with an inclination sensor or can receive the parameter value of the vehicle inclination sensor. According to the acceptable working inclination of the fuel warm air, a protection inclination value is set. When the vehicle is in an uphill or downhill state for a long time and is greater than the protection inclination value and exceeds the specified protection time, the controller outputs a protection signal, causing the tipping protection relay to close, disconnecting the normally closed signal contact, and forcing the fuel independent warm air start signal to disconnect and enter the protection mode. The protection inclination value and protection time can both be calibrated and adjusted through the controller program.

[0028] As Figure 1 shown, one contact of the first contact circuit of the fuel warm air switch is grounded (negative control in this case), and the other contact is connected to the pin 4 (heating indicator pin) of the water heating main unit.

[0029] As Figure 1 shown, the water heating main unit also has 2 pins respectively connected to the positive and negative driving control lines of the water pump for cooling, and the water heating main unit also has 2 pins respectively connected to the positive and negative driving control lines of the fuel pump for fuel supply.

[0030] The traditional control principle provides a control signal for the switch to start the operation of the water heating main engine. On this basis, the present invention adds a warm air protection relay and a tipping protection relay. Among them, the tipping protection relay uses normally closed contacts, and the warm air protection relay uses normally open contacts. The contacts of the two relays are connected in series front and back and are connected in series to the control circuit for controlling the fuel warm air start switch (that is, the circuit between the fuel warm air switch and the water heating main engine).

[0031] The coil of the warm air protection relay is controlled by the signal of the air-conditioning control panel. When the warm air function is turned on and the air volume is turned to the maximum gear, the control signal required for the closure of the warm air protection relay is output. See Figure 1 .

[0032] When the warm air function is not turned on and the air volume is not strong enough, if the independent warm air is turned on, the combustion heat cannot be effectively transferred, which easily causes the combustion chamber of the fuel independent warm air to overheat, resulting in frequent adjustment of the combustion power, which easily leads to low combustion efficiency and an increase in components such as carbon monoxide that are not fully burned.

[0033] The coil control signal of the tipping protection relay is connected to the tipping switch of the cab rear suspension through the first anti-reverse diode. When the cab tipping lock body is not effectively locked, the tipping lock signal is in the off state. At this time, the tipping protection relay does not act, and the signal is in the normally closed point conduction state, which can ensure the normal transmission of the start signal of the circuit (the circuit between the fuel warm air switch and the water heating main engine).

[0034] When repairing the tipping cab or when the cab locking state is abnormal, due to the change in the tilt angle and there is no one using the warm air in the lifted cab, there is a coolant cavity in the heat conduction space around the combustion chamber due to the tilt angle at this time, and the heat conduction is insufficient, which easily causes the combustion chamber to overheat and be dangerous. At this time, the cab tipping switch is closed, then the tipping protection relay is closed, the normally closed contact is opened, and the warm air start signal is disconnected and enters the forced shutdown protection state.

[0035] Regarding a vehicle fuel warm air control system provided by the present invention, it has the following technical effects: 1. A serial relay protection can be connected in series to the start control signal as a highly adaptable post-added protection method; 2. The cab tipping switch is used as a control protection method for detecting the tilt and repair of the cab; 3. The tilt detection and protection are realized by the controller detecting the vehicle body tilt angle and the time exceeding the protection value, and it has the ability to adjust and set; 4. The multiple protection and signal anti-crosstalk functions are realized through the multi-path parallel diode circuit; 5. The air volume and warm air mode detection of the air-conditioning control panel are used as the start protection function; 6. It has the ability to be reformed with low cost and high flexibility; 7. Have the protection ability against tipping and overheating; 8. Have the protection ability for maintenance.

[0036] In summary, the design of the above circuit structure has the advantages of convenient modification, without the need to modify the original equipment design, low modification cost, sensitive and effective protection function, and rich protection-related factors, and can be effective for various protection factors such as cab flipping, vehicle tipping, air volume, heating mode, protection time, etc.

[0037] Embodiment 3

[0038] This embodiment provides a vehicle, including a vehicle body and the vehicle fuel air heater control system provided in Embodiment 1. Among them, the normally closed contact of the power supply relay is connected to the vehicle's constant power supply, the normally open contact of the power supply relay is connected to the vehicle's ACC power supply, the positive pole of the power supply relay is connected to the vehicle's ON power supply, and one end contact of the cab flipping switch that is not connected to the coil negative pole of the flipping protection relay is connected to the vehicle ground.

[0039] The above are only the preferred embodiments of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the technical principle of the present invention, several improvements and deformations can be made, and these improvements and deformations should also be regarded as the protection scope of the present invention.

Claims

1. A vehicle fuel warm air control system, characterized in that, It includes a warm air supply unit, a fuel warm air switch, an air volume control unit, a cab tilting switch, a protection unit, and a power supply unit; The power supply unit includes a plurality of power sources for supplying working current to the warm air supply unit, and a power supply control component capable of conducting or cutting off the circuit between each power source and the warm air supply unit; The fuel warm air switch is used to turn on or off the warm air function of the warm air supply unit, and the air volume control unit is used to control the air volume of the warm air supply unit; The cab tilting switch is closed when the cab is in a tilted state or the cab locking state is abnormal, and is disconnected when the cab is in a non-tilted state and the cab locking state is normal; The protection unit is connected between the fuel warm air switch and the warm air supply unit, so that when the preset warm air opening conditions are met, the circuit between the fuel warm air switch and the warm air supply unit is conducted, and when the preset warm air opening conditions are not met, the circuit between the fuel warm air switch and the warm air supply unit is disconnected; The warm air opening conditions include: the warm air function of the warm air supply unit is turned on and the air volume is turned to a preset level, and the cab tilting switch is disconnected.

2. The vehicle fuel air heater control system according to claim 1, wherein The power supply unit includes a power supply relay, a constant power supply, and an auxiliary power supply. The power supply control component is a power supply relay. The common terminal contact of the power supply relay is connected to the positive pin of the working power supply of the warm air supply unit. The normally closed contact of the power supply relay is connected to the constant power supply, and the normally open contact of the power supply relay is connected to the auxiliary power supply.

3. The vehicle fuel air heater control system according to claim 1, wherein The warm air supply unit is a water heating main unit.

4. The vehicle fuel air heater control system according to claim 1, wherein The protection unit includes a tilting protection relay and a warm air protection relay; The common terminal contact of the tilting protection relay is connected to the normally open contact on the fuel warm air switch for connecting the warm air supply unit. The common terminal contact of the tilting protection relay is also connected in parallel with the positive pole of the coil of the tilting protection relay. The negative pole of the coil of the tilting protection relay is connected to one end contact of the cab tilting switch. The other end contact of the cab tilting switch is grounded. The normally closed contact of the tilting protection relay is connected to the common terminal contact of the warm air protection relay. The normally open contact of the warm air protection relay is connected to the start signal pin of the warm air supply unit; The positive and negative poles of the coil of the warm air protection relay adopt any one of the following two connection relationships: The first connection relationship: the positive pole of the coil of the warm air protection relay is connected to the auxiliary power supply, and the negative pole of the coil of the warm air protection relay is connected to the air volume control unit; The second connection relationship: the positive pole of the coil of the warm air protection relay is connected to the air volume control unit, and the negative pole of the coil of the warm air protection relay is connected to the ground.

5. The vehicle fuel air heater control system according to claim 4, wherein, It further includes a controller, and the negative pole of the coil of the tilting protection relay is also connected to the protection pin of the controller. The controller is used to execute a preset control method for the tilting protection relay.

6. The vehicle fuel heater control system according to claim 5, characterized in that, It further includes a first anti-reverse diode. The first anti-reverse diode is connected between the negative pole of the coil of the tilting protection relay and the protection pin of the controller, and is set to conduct unidirectionally from the negative pole of the coil of the tilting protection relay to the protection pin of the controller.

7. The vehicle fuel heater control system according to claim 5, wherein The controller is used to receive the vehicle inclination angle and the vehicle driving state. When the vehicle continuously climbs or descends at a vehicle inclination angle greater than a preset inclination threshold, and the duration of this state exceeds a preset protection time, the controller outputs a protection signal, causing the flip protection relay to close, and the normally closed contact of the flip protection relay to disconnect, thereby disconnecting the line between the fuel warm air switch and the warm air supply unit.

8. The vehicle fuel air heater control system according to claim 4, wherein The fuel warm air switch includes a first contact circuit and a second contact circuit; The normally open contact of the first contact circuit is grounded, and the common terminal contact is connected to the heating indication pin of the warm air supply unit; The normally open contact of the second contact circuit is the normally open contact on the fuel warm air switch for connecting the warm air supply unit, and the common terminal contact of the second contact circuit is connected to the power supply unit.

9. The vehicle fuel air heater control system according to claim 4, wherein It further includes a second anti-reverse diode, which is connected between the negative pole of the coil of the flip protection relay and one end contact of the cab flip switch, and is set to conduct unidirectionally from the negative pole of the coil of the flip protection relay to one end contact of the cab flip switch.

10. A vehicle, characterized in that, It includes a vehicle body and the vehicle fuel warm air blower control system according to any one of claims 1 to 9. Among them, the normally closed contact of the power supply relay is connected to the vehicle's constant power supply, the normally open contact of the power supply relay is connected to the vehicle's ACC power supply, the positive pole of the power supply relay is connected to the vehicle's ON power supply, and one end contact of the cab flip switch that is not connected to the negative pole of the coil of the flip protection relay is grounded to the vehicle body.

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