A sliding gate is a type of gate that operates by sliding horizontally along a track. It is commonly used for driveways, entrances, and other areas where a traditional swinging gate may not be practical or space-efficient.
Sliding gates are typically made of metal, such as steel or aluminum, and can be automated or operated manually. They are often equipped with wheels or rollers that allow them to slide smoothly along the track.
Automated sliding gates are controlled by an electric motor that opens and closes the gate. They can be operated using a variety of methods, including remote controls, keypads, or sensors. Some sliding gates also have safety features, such as obstacle detection sensors, to prevent accidents or damage.
Sliding gates offer several advantages over other types of gates. They require less space to operate since they don't swing open or closed. This makes them ideal for properties with limited space or steep driveways. They are also more secure and harder to force open compared to swinging gates.
However, sliding gates do have some limitations. They require a level and smooth surface for the gate to slide properly. They can also be more expensive to install and maintain compared to other types of gates.
Overall, sliding gates are a popular choice for homeowners and businesses looking for a convenient, secure, and space-saving gate solution.
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Steyr series car preheating circuit
Correct use of diesel engine intake preheating device
Diesel engines have been widely used in automobiles, especially commercial vehicles, because of their high thermal efficiency and good economics. In the low temperature environment, due to the high viscosity of the oil, the starting torque of the diesel engine is large, the initial temperature of the cylinder wall is low, the fuel atomization is poor, and the compressed air temperature does not reach the auto-ignition temperature of the fuel. Therefore, the diesel engine has a problem of low temperature starting. In order to ensure that the diesel engine can be started quickly under low temperature conditions, a preheating device such as a flame preheater and an electric heating intake preheater is generally used on the diesel engine.
Flame preheater
The flame preheater uses electric energy to heat the resistance wire to ignite the diesel to form a flame, and heats the airflow of the engine intake manifold, thereby improving the low temperature starting performance of the diesel engine. The Steyr series of engines WD615 series 67, 77, 68 and other models have adopted a flame preheater. The device installs a glow plug at the inlet of the intake pipe of the diesel engine, and the diesel fuel inlet connector is installed on the glow plug. When the power is turned on, the resistance wire in the glow plug is heated, the shaft is heated and extended, and the ball valve is opened, and the diesel is opened. It flows out and burns on fire, forming a flame to preheat the air.
1. Working principle
The drawing shows the structure of the Steyr series diesel car preheating circuit. When the key switch S1 is closed, the preheating temperature sensor B8 mounted on the engine water passage is turned on. If the engine temperature is higher than 23 °C at this time, the preheating indicator does not light, the flame preheating circuit does not work; if the engine temperature is lower than 23 °C, the temperature sensor transmits the temperature signal to the electronic flame preheating controller A24, and A24 enters the work. The state, the preheating indicator lights up, the relay contacts in the electronic flame preheating controller are closed, and the heating plugs R3 and R4 are supplied with power, and the heating time is randomly set according to different temperatures. When the heating element of the glow plug reaches 850 to 900 ° C, the power supply is switched to the intermittent state, and the warm-up indicator light starts to flash. After pressing the S6 start button, the preheating solenoid valve Y21 is turned on, and the fuel enters the glow plug through the oil pipeline. After being atomized by the atomization chamber, the heating element is ignited into a flame to heat the air in the intake manifold, so that the engine starts quickly. After the engine is started, the voltage of the generator D+ terminal rises rapidly to 28V. After the electronic flame preheating controller receives the signal, the glow plug automatically shuts off the oil circuit solenoid valve after warming up for a period of time with different temperatures. Power supply, stop working; if the engine is not started within 30s, the flame preheater circuit stops working.
2. Common fault diagnosis
(1) After the key switch S1 is closed, the preheating indicator light is always on. The cause of the fault is that the connection wire of the preheating indicator to the electronic flame preheating controller is short-circuited; the temperature sensor is damaged or the connecting wire is broken; the electronic flame The preheat controller is faulty.
(2) After the key switch S1 is closed, the preheating indicator does not light. The test light can be used to check whether the “L†terminal of the preheating controller has power. If there is no power, the fault is on the bulb and the connecting wire. Check the socket T pin with a multimeter. For the grounding resistance, the resistance should be several thousand ohms. Check the resistance of the temperature sensor with a multimeter to be greater than 1040 Ω. If the resistance is too small, the temperature sensor is damaged and should be replaced. After eliminating the above factors, it can be concluded that the fault is in the electronic flame preheat controller.
(3) The preheating indicator is normal, but there is no preheating. The cause of the failure is the glow plug burnout, the wire break between the controller and the glow plug, the fuse F34 blown, the temperature sensor failure and the preheat controller. damage. Remedy: Turn on the ignition switch and check the preheat plug wire for power with the test light. If there is electricity, the glow plug will not burn when the glow plug is not hot, and the glow plug needs to be replaced. If there is no power, check whether the FGK terminal of the preheating controller has power. If there is power, the line is open. If there is no power, the power circuit and the input signal circuit are faulty. Check if the preheating controller power fuse, terminal block 31 grounding, temperature sensor, etc. are faulty.
Electric heating intake preheater
The electric heating intake preheater uses an electric heating element to heat the intake air flow. The commonly used heating element is a ceramic preheater PTC. The PTC is made by utilizing the characteristic that the resistance of the ceramic semiconductor material changes with temperature.
1. Working principle
PTC ceramic electric heating intake preheating system is installed on diesel vehicles such as Dongfeng EQ1118GA, Liberation CA1121J and Liberation CA1122. The system is mainly composed of PTC preheater, preheating controller (with built-in buzzer), preheat switch, pre- It consists of a thermal relay and a preheating indicator (installed in the preheat switch).
The working process is as follows: open the main power switch, after the ignition lock is turned to the ON gear, press the preheat switch, the power supply circuit of the preheating controller is turned on, the preheating controller starts to work, and the preheating indicator lights up, The thermal relay contacts are closed and the preheater starts to work. After the preheating controller is warmed up for 6 minutes, the intake air preheating indicator light flashes and the buzzer is roaring, indicating that the engine can be started. The preheater power-off protection time is set to 12 min. When the warm-up time exceeds 12 minutes, the driver still does not turn off the preheater, the preheater power is automatically cut off, the buzzer stops roaring, and the indicator light changes from blinking to steady, reminding the driver to turn off the preheater switch.
2. Common fault diagnosis
(1) Press the preheat switch, the preheat indicator does not light. Under normal conditions, press the preheat switch and the indicator should light. The cause of the indicator light is not bright: the preheating fuse is blown due to the grounding of the wire; the fuse and the controller wire plug connector are loose or the contact is poor; the preheating switch indicator light is damaged; the preheating controller is damaged or the wire is connected incorrectly.
(2) When the warm-up time exceeds 6 minutes, the indicator light does not flash. When the warm-up time exceeds 6 minutes, the indicator light should flash and the buzzer will roar. If the indicator does not flash, the cause of the fault may be a fault in the internal circuit of the preheat controller. In this case, replace the preheat controller.
(3) The fusible link is blown. The fusible link is set to prevent the positive lead wire of the preheater from being burned by the iron. The causes of the fusible link being blown are: the positive lead wire is broken and the preheating relay is connected to the column. Remedy: The segmentation method can be used to eliminate the fault. When the main switch of the power supply is turned on, the fusible link is blown, indicating that the battery to the preheating relay has a ground fault on one of the lines; when the preheater switch is turned on, the fusible link burns. Broken, indicating that there is a ground fault in the other line of the preheating relay to the positive terminal of the preheater.
(4) The main reasons for the preheater not heating are: the fusible link is blown; the preheating controller to the preheating relay wire plug is disconnected or the wire is broken; the preheating relay contact is not closed; the preheater is damaged or the preheater The anode is broken; the battery is seriously depleted.
Remedy: Check the green and white wires of the preheating controller to the preheating relay with the test light. Under normal circumstances, the test light should be on. If the test light is not lit, it indicates that the fault is on the preheating control circuit. It should be checked whether the plugs of the wires are correctly inserted and secured, and whether the wires are open and excluded according to the situation; if the test light is on, the fault is in the preheating circuit, and the test is available. The lamp separately checks the two posts of the preheating relay. If the test lamp is not lit, it indicates that the fusible link is blown or the positive lead is broken. The grounding fault should be eliminated and the fusible link should be replaced. If one test light is on, the other is not lit. If the preheat relay contact does not pick up, replace the preheat relay. If the test light on the preheating wire connection Post is bright, the preheater is damaged. When determining that the preheater is damaged, check if the preheater negative lead is missing or open.