Browse

Property For Sale Property For Rent

Used Cars Others

Antiques Collectibles Apparel Baby Kids Items Books， Movies And Music Electronics Free Stuff Garden Outdoor Health Beauty Home Goods Home Improvement Supplies Musical Instruments Office Supplies Others Pet Supplies Sporting Goods Ticket Toys Games Transportation

Business Crafts Design And Web Events Home Improvement Legal Lessons Personal Pets Photography Repair And Technical Support Wellness Writing， Translation， And Transcription Others

Activities & Groups Artists & Musicians Classes & Lessons Events Friendship & Networking Lost & Found Rideshare Sports Teams Volunteers Travel & Travel Partners Skills & Language Swap Other

What is the principle of a continuously variable transmission?

2 Answers

ConnorRose

09/03/25 5:25am

Working principle of continuously variable transmission: Most continuously variable transmissions use thyristors as control elements to control the conduction time of AC circuits, thereby regulating the working current of the load. Currently, CVT technology is developing rapidly, and major automobile manufacturers are strengthening research and development in this field. Especially in the future where hybrid vehicles have broad prospects, the position and role of CVT are irreplaceable, and it will be the major trend in the development of future transmissions. The main characteristics of continuously variable transmission are as follows: 1. Low cost: simple structure, small size, and fewer parts, making the cost of mass production definitely lower than that of current ordinary automatic transmissions; 2. Reduced fuel consumption and emissions: It has a wide working speed ratio range, making it easy to form an ideal match with the engine, thereby improving the combustion process and reducing fuel consumption and emissions; it has high transmission efficiency, less power loss, and high economic efficiency.

Was this review help?

17

0

Share

McElliana

09/15/25 6:56am

I've always been fascinated by automotive technology, especially things like continuously variable transmissions (CVT). Its working principle is quite ingenious, achieving seamless gear changes through a system of two movable pulleys. One pulley is connected to the engine, the other to the wheels, linked by a metal belt or chain. When you press the accelerator to speed up, the hydraulic system adjusts the pulley positions: when the pulleys move closer, the belt's running radius decreases, resulting in a lower gear ratio suitable for starting; when the pulleys move apart, the radius increases, the gear ratio rises, and the car speeds up. The entire process is continuous, without the jerky shifts of traditional automatic transmissions, allowing the engine to maintain optimal RPMs for efficiency. This makes driving incredibly smooth and fuel-efficient. I've learned some details online—many modern cars like the Toyota Corolla use this design, which is simple and reliable in structure. However, it's important to monitor belt wear during maintenance, as slippage can occur at high speeds if neglected. Overall, this technology makes driving much easier, especially in stop-and-go city traffic where it feels particularly effortless.

Was this review help?

15

2

Share

Expand All

More Forum Discussions

When driving, should you shift gears first or pull the handbrake first?

When driving, you should shift gears first. The specific reasons are as follows: 1. In a car's transmission, both the P (Park) and N (Neutral) gears disconnect the power transfer between the input and output shafts. However, the difference is that the P gear has an additional pawl gear mechanism at the end of the output shaft. 2. The pawl is fixed to the transmission housing, while the gear is fixed to the end of the output shaft. When the transmission is shifted into P gear, the pawl is pressed down to engage with the gear, achieving a locking effect. At this point, both wheels cannot rotate in the same direction simultaneously, preventing the vehicle from moving forward or backward. 3. The principle of the handbrake stopping the vehicle is by clamping the rear brake discs, preventing the rear wheels from rotating. Mechanical cable-type handbrakes use a steel cable to pull the brake caliper, which then clamps the brake disc, while electronic handbrakes operate a servo motor on the brake caliper to clamp the brake disc.

What types of vehicles can be driven with an A1 driver's license?

A1 license allows driving large passenger vehicles (passenger vehicles with a length exceeding 6 meters or designed to carry more than 19 passengers). Requirements for upgrading to an A1 license: Must have held a B1 or B2 license for at least five years, with no record of full penalty points in the last three consecutive scoring cycles prior to application; or must have held an A2 license for at least two years, with no record of full penalty points in the last scoring cycle prior to application. Other vehicle types that can be driven with an A1 license include: A3 (city buses), B1 (medium-sized passenger vehicles), B2 (large trucks), C1 (small cars), C2 (small automatic transmission cars), C3 (low-speed trucks), C4 (three-wheeled vehicles), M (wheeled self-propelled machinery). Only an A2 license permits driving full trailers and semi-trailers, which an A1 license does not cover.

Should You Press the Clutch When Making a U-Turn in Subject 3?

You do not need to press the clutch when making a U-turn in Subject 3. Specific steps for making a U-turn in Subject 3: Upon hearing the voice prompt "Please make a U-turn ahead," observe the road conditions. If there is sufficient distance from the vehicle ahead or no vehicle in front, press the brake to slow down. When the speed drops below 10 km/h, shift to 1st gear, turn on the left turn signal, glance at the left rearview mirror to confirm rear traffic safety, and after 3 seconds, perform the lane change operation, gradually moving into the U-turn lane. Situations where U-turns are not allowed in Subject 3: Do not make a U-turn on a pedestrian crossing, nor stop and wait on it. You must pass the pedestrian crossing before making a U-turn. If making a U-turn at a traffic light intersection where the center line near your side is solid, wait for the green light and cross the stop line to make the U-turn.

What is the normal RPM for a car engine when it is just started?

When starting the car, the engine RPM of 1200 to 1500 is normal. More knowledge about car starting is as follows: 1. After the car starts, there is a high idle speed process, especially in winter, which is more obvious. This is a phenomenon controlled by the on-board computer (for vehicles with electronic throttle control systems). When the engine reaches a certain temperature, the idle speed will return to normal. This helps accelerate the engine temperature to the normal working condition when starting a cold car. 2. There may be slight abnormal noises when starting the car engine. If the noises disappear after a few minutes of warming up, this does not affect the vehicle's driving. Because after the vehicle has been parked overnight, the engine oil in various components has flowed back to the oil pan, so it is best to warm up the car for a few minutes in the morning. One reason is to allow the oil to be evenly supplied to all components, and the other is to raise the engine temperature for better performance.

How Many Cylinders Does a 1.5t Engine Have?

1.5t engines come in both 3-cylinder and 4-cylinder configurations. Below are the differences between 3-cylinder and 4-cylinder cars: Difference in Stability: Four-cylinder cars clearly offer much better stability compared to three-cylinder cars. This is because the four-cylinder engine operates with each cylinder working separately, allowing the forces and counterforces to cancel each other out, significantly reducing engine vibration. Three-cylinder engines lack one cylinder, meaning there is a moment during operation when no cylinder is firing, resulting in noticeably more vibration. Consequently, the stability of three-cylinder engines is naturally inferior to that of four-cylinder, six-cylinder, and eight-cylinder engines. Difference in Structure: Three-cylinder engines have a simpler structure, are more compact, lighter in weight, and easier to arrange in a vehicle. Four-cylinder engines have a relatively more complex structure with one additional cylinder. In terms of structural design, three-cylinder engines have one fewer cylinder than four-cylinder engines, and correspondingly fewer camshaft attachments.

What happens if spark plugs are never replaced?

Effects of not replacing spark plugs: If spark plugs are damaged, it can directly cause issues such as leakage in the vehicle's ignition system, increased fuel consumption, reduced power, and most importantly, difficulty in ignition, affecting the normal operation of the vehicle. Severe erosion of spark plugs, including blistering, damage, or melting of the electrodes, indicates that the spark plugs are ruined and should be replaced. Methods to determine if spark plugs are damaged: Remove the spark plugs and observe their appearance to assess their condition. Normal spark plugs have insulator skirts and electrodes that appear gray-white, gray-yellow, or light brown. A properly functioning spark plug has a reddish-brown insulator skirt, an electrode gap between 0.8-0.9mm, and no signs of electrode burn. If the spark plugs are covered in oil or deposits but are not damaged, they can continue to be used after cleaning off the oil and deposits. If the spark plugs are severely damaged, showing signs such as blistering, black streaks, cracks, or melted electrodes, the cause of the damage should be identified. After troubleshooting, replace the spark plugs with new ones. Additionally, if the spark plugs appear black as if smoked, it indicates the wrong heat range was chosen or the mixture is too rich, with oil seeping up.

Trending Ranking

What are the vehicle inspection exhaust emission standards?

How Long After Booking Can You Take the Driving Test Subject Three?

When did the National V emission standards come into effect?

What is the effect of polishing?

Precautions for Changing to Snow Tires

Is the Sharan an imported model?

What Items Are Included in an Emergency Rescue Kit

How to Activate One-Touch Power Window on Civic?

Is it necessary to replace the missing control arm bushings?

Does the 2021 BMW 3 Series Burn Engine Oil?

More Forum Discussions

What does 'use-with' mean on the air conditioner?

What Are the Reasons for Poor Car Acceleration?

Should You Shift to 1st Gear When Going Downhill?

What kind of water should be added to a car?

Help

Cookie

Cookie Settings

© 2025 Servanan International Pte. Ltd.