What is the difference between DC and AC igniters?

1 Answers
VonSarah
07/25/25 1:40pm
The differences between DC and AC igniters are as follows: 1. Power supply method: AC igniters are powered by the stator coil of a magneto, while DC igniters are powered by a battery or rectifier. You can determine whether it is an AC or DC igniter by checking whether the power supply line to the igniter comes from the magneto or the battery. 2. Shutdown method: AC igniters shut down by short-circuiting the ignition signal line to ground. The igniter has a shutdown wire connected to the shutdown switch, and closing the shutdown switch grounds and shorts the circuit to shut down. On the other hand, DC igniters shut down by cutting off the DC power supply, which is achieved by closing the shutdown switch to disconnect the power.
Was this review help?
12
1
Share
More Forum Discussions

How to Calculate Car Fuel Consumption?

Introduction to car fuel consumption calculation methods is as follows: 1. Analysis based on engine fuel power stroke: The most direct factor affecting fuel consumption is engine speed. For each revolution of the engine, one cylinder injects fuel (in a four-cylinder engine), meaning higher speed leads to greater fuel consumption. However, engine speed varies during driving, making it too volatile and complex for calculating vehicle fuel consumption. 2. Vehicle travel distance: Expressed as fuel consumption per 100 kilometers, this is currently the mainstream method for calculating car fuel consumption. Various vehicle parameter indicators use this metric to evaluate whether a car is fuel-efficient. Both methods mentioned above cannot or are inconvenient for comprehensively reflecting a vehicle's fuel consumption index, especially the second mainstream calculation method, which fails to account for fuel consumption when the vehicle is stationary. Therefore, using a time-based indicator to measure a vehicle's comprehensive fuel consumption index is more reasonable.
3
1
Share

What are the symptoms of water in the air filter?

The engine may experience poor acceleration, dullness, and insufficient fuel supply. More information about the air filter is as follows: 1. Waterproof performance of the air filter: The air contains a large amount of moisture, especially on rainy days when the moisture content is even higher. If the air filter's waterproof performance is poor, it can easily become damp. Once damp, the air filter can obstruct the smooth intake of air into the engine, potentially leading to blockages. 2. Filtration accuracy of the air filter: If the filtration accuracy is not high enough, even small dust particles and impurities can be sucked into the compressor in large quantities, affecting the service life of components such as the oil separator, engine oil, oil filter, and bearings. 3. Air permeability of the air filter: If the air filter's permeability is poor, it can also obstruct the smooth intake of air into the compressor, making it prone to blockages and consuming more energy.
3
5
Share

How often should the canister purge solenoid valve be replaced?

There is no fixed replacement interval for the canister purge solenoid valve. Its condition can be assessed by measuring the resistance of the solenoid valve. If the measured value deviates from the standard, the solenoid valve should be replaced. Below is more information about the canister purge solenoid valve: 1. Function: It is a device designed to reduce the emission of gasoline vapors from the fuel tank and carburetor. 2. Structure: The automotive activated carbon canister is typically designed as a long "box" connected between the fuel tank and the engine intake manifold. The "box" is equipped with an intake port and an exhaust port, usually located on the same side. Inside the canister, it is divided into two or three chambers to extend the path of the fuel vapor, thereby improving adsorption and desorption efficiency. These chambers are filled with granular activated carbon, specially processed to effectively adsorb fuel vapor molecules.
17
2
Share

How Long After Passing Subject 4 to Get the License?

You can get the license on the same day after passing Subject 4. Here are some important notes for the Subject 4 exam: 1. Follow the exam room rules: If someone is making noise while waiting, they will be immediately expelled from the exam room and disqualified from taking the exam that day. 2. Obey the staff's instructions: Raise your hand if you have any questions, and don't hesitate to ask the examiner. Don't be afraid. Someone couldn't get their fingerprint recorded but was too scared to ask, and the examiner got angry and left. 3. Verify your personal information after sitting down: If the information doesn't match yours, check if it's your seat. If it's not, find your correct seat. If the seat is correct but the information is wrong, report it immediately. Someone answered 15 questions before realizing it wasn't them, and both people failed as a result.
15
3
Share

What to Do When the Engine Won't Start?

Here are the solutions for when the engine won't start: 1. Power off and restart; Just like a mobile phone, turning it off and on again can solve many problems. If the car won't start, try powering off and restarting first. When you find that the car won't start, open the hood and locate the battery. 2. Jump-start; This type of power bank can not only charge your phone but also jump-start your car, and even charge a laptop, because car power banks have an additional 12V output port. 3. Replace the battery; The battery is a wear-and-tear part of the car, with a lifespan of only 3 to 4 years. Even if there are no issues, it should be replaced when it reaches the end of its life.
17
1
Share

What car is bodge?

bodge is Baoqi Automobile. The following is the relevant introduction of Baoqi Automobile: 1. Business scope: including three types of automobile maintenance (body cleaning and maintenance, tire dynamic balance and repair); automobile information consulting services; annual inspection of motor vehicles and license plate procedures agency; sales: automobile parts, mechanical equipment, hardware, automobile decorations; self-operated and agency import and export business of various commodities and technologies, etc. 2. Passenger car models: mainly include: ordinary passenger cars, convertible passenger cars, luxury passenger cars, small passenger cars, convertibles, hatchback passenger cars, station wagons, multi-purpose passenger cars, short-head passenger cars, off-road passenger cars, and special passenger cars.
20
1
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.