Car knowledge quiz 1. 15 car knowledge quiz (relatively simple)

What are the advantages and disadvantages between SOHC and DOHC? DOHC is designed to make the angle of the flap more suitable for the shape of the combustion chamber, so the overall flap area can be increased, each flap is lighter and the inertial mass is reduced, so the steam intake efficiency can be improved. On the contrary, SOHC has only one camshaft, which limits the angle of flap, has higher basic inertia and worse high-speed running performance. However, due to its simple structure, the maintenance cost is more suitable than DOHC. 2. What's the difference between torque and horsepower? What is the use of both? Engine torque is the power to push the vehicle, whether it is static acceleration, climbing or resisting air resistance at high speed, it is handled by engine torque. Horsepower is the physical quantity of torque multiplied by revolutions. Horsepower is very suitable to describe the effect of engine on vehicles, because it contains the element of speed. In the United States, because SINUNIT is not used, it is necessary to multiply the torque by the number of revolutions and then by an odd constant, which becomes metric horsepower. In fact, horsepower is really as simple as the number of revolutions multiplied by the torque, except that the number of revolutions is calculated in radian per second and the torque is calculated in Nm. 3. How are the horsepower and torque units such as 3.BHP, PS, HP, IBFT and Kgm converted? Basically, BHP, PS and HP don't need to be converted, they all refer to horsepower. Even if the test methods are different, they cannot be converted by means. As for the torque kgm and ib-ft, they can be converted, which is very simple. 1 kg equals 2.2 pounds, 1 m equals 3.29 feet, so 1 kg equals 7.22 pound feet, or 662. OHC is further developed on the basis of OHV. OHC is better than OHV in thermal efficiency, horsepower, fuel consumption and balance. The main advantage of OHV is its cheapness. If someone tells you that OHV will provide better torque, it is a lie. OHC can be designed to have better low torque than OHV. The question is whether it is necessary. 5.5 What's the difference? German industrial standard and JIS output value? The JIS test method in Japan and DIN test method in Germany are to connect the engine to a dynamometer instead of using a treadmill. The main difference between JIS and DIN is that JIS will remove all loads connected to the engine, so the measured value will be larger, while DIN engine will connect the water impeller and Moto, and the value will be smaller. Although their testing principles are very similar, both of them use dynamometer to measure braking force, but we still can't directly convert from JIS to DIN, because their measuring machines are completely different. PS is a common horsepower unit in Japanese books, but it does not represent JIS. Usually, individual test methods will be described separately. Bhp and hp are abbreviations of brake horsepower and horsepower, which are easy to understand and are both horsepower units. Bhp refers to testing by braking the engine. In fact, even if different methods are used to test, the horsepower figures are only a few percent different. 6. What is the cylinder diameter x piston stroke? Cylinder diameter x piston stroke is a way to describe cylinder volume. Compared with writing a paper directly, it can better understand the design of the engine and show some basic characteristics of the engine. For example, the stroke value is greater than the diameter, indicating that the engine is biased towards high torque output; Instead, it focuses on the characteristics of greater horsepower. 7. What is a wind drum? Air drum has several meanings in automobile terminology, such as the shell of air filter, servo booster of vacuum servo braking, or compressed air reservoir of heavy truck. 8. Why do different types of burners have to keep a specific nozzle gap? How to measure these gaps? The gap between nozzle electrodes is related to the shape of engine combustion chamber, the direction of steam flow, charging time in ignition circuit, flashover voltage and so on. The most common problem of improper nozzle clearance is to affect the stability of idle speed and the output at high speed. If you want to measure the gap, you can buy a set of filling ruler from the hardware store to measure the plug gap and adjust the plug gap. You can use needle-nosed pliers. 9. How often should the nozzle be replaced? And why is the burner made of platinum? If the amount of gasoline supplied by the engine and the ignition time are normal, and the engine oil does not enter the combustion chamber due to internal wear, a set of burners can be used for 20 thousand kilometers. However, if the engine is weak, ignition is difficult or there are abnormal changes, the burner should be checked. Platinum is a metal with heat resistance and high conductivity, and it is certainly suitable for manufacturing burners. 10. What's the difference between mushroom shock absorber and general shock absorber? Mushroom-shaped air partition is more suitable for high-speed driving because of its large flow. April 29, 200617:13 night wind 1 1. What are the advantages and disadvantages of bipolar burner? Bipolar burner, when igniting, the fire jumps from the positive pole to the two poles at the same time, covering a wide range of sparks. However, due to the split of electricity, the energy of a single spark is naturally halved. At the same time, the bipolar burner may also have a negative impact on the flow of air and combustion mixture in the engine, so whether to use the bipolar burner should be related to the design of the engine. That is to say, your engine is a bipolar burner required by the manufacturer, so it is naturally suitable to use the 5000.0000000105 burner in design. The degree of cold and hot is indeed different, that is, the size of the insulating layer on the anode will affect the electrode temperature when the burner works. However, the climate varies from place to place, and the temperature difference to the south is not great. Don't change the model recommended by the manufacturer unless the engine has carbon deposition problems. As for the lamp cap wire, performance is not necessarily related to the wire diameter, and low resistance does not interfere with the radio, so it is a good lamp cap. What is a rotary engine? The difference between the 5438+03 rotary engine and the traditional reciprocating engine is that the part that generates power is the rotating rotor, not the piston that moves up and down. At present, a large number of rotary engines are produced for automobiles, only Mazda Wankel engine. Wankel engine still uses the traditional four-stroke principle to generate electricity, that is, inhaling the mixture of gasoline and air, pressurizing, igniting and burning to generate electricity. And then exhaust the exhaust gas. However, these four working sequences are all completed by changing the combustion chamber volume through the eccentric rotation of the triangular rotor in the widened 8-shaped cavity. The center of the triangular rotor is connected with the crankshaft passing through the rotor through gears, which changes eccentric motion into concentric motion and becomes the output power of the engine. What are the characteristics of rotary engine and general engine? The biggest advantages of rotary engine are few parts, small size and light weight.

2. Car tips

I only have a little common sense about car maintenance.

Automobile maintenance includes internal maintenance and external maintenance. External maintenance refers to the anti-aging maintenance of automobile surface and body paint primer, such as automobile painting, automobile waxing, automobile tires, tire pressure measurement, automobile cleaning and car washing, and automobile film pasting. , can play the role of car primer or car maintenance. Inside refers to the car, such as interior cleaning, sauna disinfection, engine cleaning, air conditioning cleaning, oil replacement, glass water, automobile chassis armor, etc. Are ways to maintain cars. There are also routine maintenance items: oil change every 5,000 km/time, fuel filter every 25,000 km/time, spark plug every 25,000 km/time, brake fluid every 40,000 km/time, air conditioning filter screen, automatic transmission oil and filter screen and manual transmission oil every 80,000 km/time, battery cleaning every 2-3 years and oil cleaning every 25,000 km/time. Throttle 15000km/ time, door lock, hinge, sunroof, hood lock, trunk lock, etc. 1000 km/inspection and lubrication.

3. Traffic safety knowledge 100.

First of all, walking instructions

1, pedestrians must take the sidewalk, and those without sidewalks must take the roadside;

2. Pedestrians are not allowed to chase and run in the roadway, and they are not allowed to suddenly turn and cross when the vehicle approaches;

3, are not allowed to pick up the car on the road, chasing the car, are not allowed to forcibly pulled up or parabolic hit the car;

4, are not allowed to play on the road, frolicking;

5. Preschool children must be led by adults when walking in the street or expressway;

Second, the travel instructions

1, vehicles are not allowed to call in the middle of the road;

2, motor vehicles are not allowed to be any part of the body out of the window; 3, when riding, are not allowed to stand, not allowed to eat in the car;

4. Don't get on or off by force, get off first and then get on, wait in line and get on in order; After getting off the bus, wait for the vehicle to leave. If you want to cross the road, you must walk safely.

5. Do not take overloaded vehicles or vehicles without passenger and sports licenses;

Third, riding instructions.

1, children under the age of twelve are not allowed to ride bicycles or tricycles on the road;

2. Before turning, slow down, turn around, reach out and don't turn suddenly;

3. Hands are not allowed to leave the handle and climb other vehicles or objects;

4. Vehicles are not allowed to drive in parallel, chase each other or meander;

5. Always check the performance of the car. You can't ride a bike when there is something wrong with its bell, brakes or other parts. You should repair it in time.

6, no umbrellas, no cycling with people;

7, are not allowed to learn to ride a bike on the road;

8, are not allowed to park in the driveway or compete with motor vehicles;

4. Automobile knowledge contest

It is really challenging to hold a city-wide automobile knowledge contest. . Ha ha. . .

The main steps are those steps, and the details can be slowly pondered.

First of all, there must be an "event organizing Committee"!

Make the division of labor in the organizing Committee more detailed, such as those in charge of the venue, financial accounting and contact leaders.

Personnel, personnel who contact experts, etc.

Secondly, there must be a special car to pick up and drop off the contestants, and there must be event sponsors. Contacting sponsors is a win-win situation.

Measures, the organizer of the event can spend less money, and the sponsor is equal to the city.

Made an advertisement.

Finally, you need to contact the speakers, rainbow doors and salutes in the competition venues. There are also prizes for the competition, Bao.

Including both material and spiritual aspects, there must be bonuses and prizes.

The most important thing is to make full preparations for this activity. Let's talk about automobile knowledge first, and have a sense of hierarchy.

Because of the understanding of cars, the differences between people are quite big, so don't be too professional.

And some fun.

In addition, don't ignore the influence of the media, notify newspapers and TV stations, and it is best to greet local influential websites and publicize them in place. Just give these to the staff of the organizing Committee.

Do your best! !

I hope this event can be held successfully! !

5. Automobile knowledge

It is very important to keep a good view in rainy days, because the driver's view is blocked and it is easy to cause traffic accidents.

1, turn on the wiper to clean the raindrops in time; 2. When the weather is dim, turn on the low beam lights, fog lights and position lights; 3. If there is fog on the glass and the line of sight is blocked, turn on the air conditioner in time to blow away the fog; 4. Keep the rearview mirror clear, turn on the heating function of the rearview mirror or add plastic sheets to cover the rain; 5. Pay attention to the surrounding road conditions and drive carefully. Slow down and drive carefully "ten accidents and nine fast", the road is slippery in rainy days, and drive carefully.

1, reduce the speed and keep a safe distance; 2. Drive carefully and always pay attention to the road conditions, especially when there are many pedestrians; 3, according to the road conditions, adjust the speed in time, unfamiliar with the road conditions should control the speed; 4. follow the car. For unfamiliar roads or difficult sections, drive cautiously along the route of the preceding vehicle; 5. Follow the car slowly, don't blindly overspeed, and ensure overtaking safety. Driving away from the big car in rainy days will bring many potential dangers to the small car, so the small car should stay away.

1, keep away from large vehicles; 2. Don't let large cars block the front sight; 3. Pay attention to the blind spot of sight of large vehicles to avoid danger; 4. Stay away from large vehicles and avoid the rain splashing from large vehicles to interfere with driving; 5. Don't follow blindly. Small cars may not be able to pass through the waterlogged sections where large cars can pass. Prevent the wheels from slipping. The road is slippery on rainy days, which makes driving very dangerous. It is necessary to prevent the wheels from slipping.

1, steady the steering wheel, don't panic, hold the steering wheel with both hands in balance; 2. Keep driving in a straight line and drive at low speed; 3. Don't turn sharply, step on the brakes to slow down; 4. Don't accelerate too fast, but slow down the acceleration; Wading skills It is inevitable to drive in rainy days, so pay attention to skills at this time. 1, don't wade rashly. If you encounter a stagnant road surface, you must first check the depth of the stagnant water; 2. Slow down at a constant speed, don't stop, don't pass at high speed; 3. Shift down first, pass slowly, and don't shift gears in the middle; 4. If you encounter a muddy section, you must follow the rut of the car in front; Never start the vehicle again in rainy days after the flameout, and be sure to pay attention to the water in the engine. If the vehicle is damaged, there is a great safety hazard.

1. Once the engine is turned off with water, do not try to start the vehicle; 2. Drag the vehicle to a place that does not hinder traffic and wait for it to be towed away; Wait for the rescue in the car, don't rush to repair it yourself, so as not to cause more losses. Watch out for pedestrians. It is inevitable that people's sight will be affected on rainy days. When driving, you must pay attention to pedestrians to avoid traffic accidents.

1, don't rush with pedestrians, pay attention to avoid; 2. Observe pedestrian dynamics to avoid approaching panic and slipping; 3. If it is inconvenient to avoid, stop and wait; 4, pay attention to sprinkler, slowly through, don't splash water on pedestrians. Don't risk driving in rainy days, safety first, don't risk driving to ensure safety.

1, if the rain is too heavy, don't get on the bus in a hurry; 2. Choose a safe road section or service area to rest, and then drive when the rain is light; 3. If you are unfortunately trapped in the car, unplug the seat headrest, tap the side glass with two sharp plugs, or insert the plugs between the glass and the door panel to break the glass.

6. Some basic knowledge about cars

A car is a trackless trolley-bus, which is driven by its own power device and has four or more wheels.

Two, the design and technical characteristics of the bus are mainly used to carry passengers and their carry-on luggage and/or temporary items, including the driver's seat, and the bus has a maximum of 9 seats.

Thirdly, the engine is the power device of the automobile, which consists of two mechanisms and five systems: crank-connecting rod mechanism, valve train, cooling system, oil supply system, lubrication system, ignition system and starting system, but the diesel engine has one less ignition system than the gasoline engine.

1. cooling system: generally composed of water tank, water pump, radiator, fan, thermostat, water thermometer and drain switch. There are two cooling methods for automobile engines, namely air cooling and water cooling. Generally, automobile engines are mostly water-cooled.

2. Lubrication system: The engine lubrication system consists of oil pump, filter screen, oil filter, oil circuit, pressure limiting valve, oil gauge, pressure sensitive plug and dipstick.

3. Fuel supply system:

The fuel system of gasoline engine includes fuel tank, gasoline meter, gasoline pipe, gasoline filter, gasoline pump, carburetor, air filter and so on.

The fuel system of diesel engine includes main components such as fuel injection pump, fuel injector and governor, and auxiliary devices such as diesel tank, fuel transfer pump, oil-water separator, diesel filter, fuel injection advance device, high and low pressure oil pipes, etc.

4. Starting system: starter, battery, etc.

5. Ignition system: spark plug, high voltage wire, high voltage coil, distributor, ignition switch, etc.

6. Crank-connecting rod mechanism: connecting rod, crankshaft, bearing bush, flywheel, piston, piston ring, piston pin, crankshaft oil seal, etc.

7. Valve mechanism: cylinder head, valve cover camshaft, valve intake manifold, exhaust manifold, air filter, muffler, three-way catalytic supercharger, etc.

Four, automobile braking system can be divided into hand braking system, dynamic braking system and servo braking system. The braking system with the driver's body as the only braking energy source is called hand braking system; A system that brakes completely by converting the engine power into potential energy in the form of air pressure or hydraulic pressure is called a dynamic braking system.

V. Automotive electrical equipment consists of power supply and electrical equipment. The power supply includes storage battery and generator; Electrical equipment includes the starting system of engine, the ignition system of gasoline engine and other electrical equipment.

Six, the engine torque refers to the engine torque output from the crankshaft. Under the condition of constant power, it is inversely proportional to the engine speed. The faster the engine speed, the smaller the torque, and vice versa, which reflects the load capacity of the car in a certain range.

Seven, the role of the automobile starter is to convert electrical energy into mechanical energy, drive the crankshaft to rotate and start the engine. When using the starter, it should be noted that the starting time should not exceed 5 seconds each time, the interval between each use should not be less than 10- 15 seconds, and it should be used continuously for no more than 3 times.

Extended data:

1, automobile body structure mainly includes: body shell (body in white), doors, windows, front panel parts, interior and exterior decorative parts and body accessories, seats, ventilation, heating, air conditioning, air conditioning devices, etc. Trucks and special vehicles also include trucks and other equipment.

2. The car body is installed on the frame of the chassis for drivers and passengers to ride or load goods. The body of passenger cars and buses is generally a whole structure, and the body of freight cars is generally composed of cab and cargo box.

3. Components that generate a force (braking force) that hinders the movement or movement trend of the vehicle. The brake commonly used in the history of automobile development is called friction brake, which generates braking torque by using the friction between the working surface of fixed parts and rotating parts. It has two structural forms: drum brake and disc brake.

4, the tire is one of the important parts of the car, it is in direct contact with the road surface, and together with the automobile suspension * * * reduces the impact of the car when driving, ensuring the car has good ride comfort and ride comfort; Ensure the good adhesion between the wheels and the road surface, and improve the traction, braking and passability of the car; Bearing the weight of the car, people pay more and more attention to the important role of tires in the car.

5. The cylinder working volume of an automobile refers to the gas volume swept by the piston from the top dead center to the bottom dead center, also known as the single cylinder displacement, which depends on the cylinder diameter and piston stroke. Engine displacement is the sum of the working volumes of each cylinder, which is generally expressed in milliliters (CC). The engine displacement is one of the most important structural parameters, which can represent the size of the engine better than the cylinder diameter and the number of cylinders. Many indexes of the engine are closely related to the displacement.