Should I generally use 92 or 95 octane gasoline?

What Causes the Smell of Gasoline When Starting a Car?

Car starting with a gasoline smell is mainly due to the vehicle's catalytic converter, specifically the following situations: Cold start when the catalytic converter temperature is insufficient: The catalytic converter requires a working temperature between 200-350°C to start functioning, and during normal operation, the temperature should be between 350-700°C. During a cold engine start, the catalytic converter's temperature is low and hasn't reached the working temperature. Therefore, it is normal to smell gasoline in the engine exhaust. Under normal circumstances, the engine RPM is relatively high during a cold start, one of the purposes being to quickly raise the catalytic converter's temperature. Poor combustion condition when the engine is warm: Normally, after gasoline is completely burned and purified by the catalytic converter, no noticeable smell should be present in the exhaust. However, when the engine's combustion condition is poor, an incorrect air-fuel ratio can lead to incomplete combustion of some gasoline, resulting in a possible gasoline smell. This means that the main reason for the gasoline smell when the engine is warm is that some gasoline is not burned. Issues such as engine misfire, severe carbon buildup on spark plugs or fuel injectors, malfunctioning ignition system, inaccurate ignition timing, or a dirty oxygen sensor can all contribute to the gasoline smell. Aging catalytic converter: In many older cars, the catalytic converter may be severely aged, and the oxygen sensor heavily clogged, rendering it ineffective for purification. In such cases, a gasoline smell may also be detected in the exhaust. The solution is to replace the catalytic converter, as general cleaning is often ineffective.

2

Share

Where to Recycle Three-Way Catalytic Converters?

Three-way catalytic converters can be recycled by local automotive recycling manufacturers. Below is more information about three-way catalytic converters: 1. Introduction: The three-way catalytic converter is the most important external purification device installed in a vehicle's exhaust system. It converts harmful gases such as CO, HC, and NOx emitted from vehicle exhaust into harmless carbon dioxide, water, and nitrogen through oxidation and reduction reactions. 2. Structure: The outer shell of a three-way catalytic converter is made of double-layer stainless steel plates forming a cylindrical shape. The interlayer between the double-layer thin plates contains insulating material, such as asbestos fiber felt. Inside, a purifying agent is placed between mesh partitions. The purifying agent consists of a carrier and a catalyst.

7

1

Share

Does a squeaking sound mean the brake pads need to be replaced?

A squeaking sound indicates that the brake pads need to be replaced. Below is relevant information about automotive brakes: 1. Introduction to brakes: Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other transportation tools, or machinery. The general principle of braking involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base to generate braking torque under external force. The braking device, also known as a decelerator, is a mechanical braking device that can slow down the vehicle. 2. Classification of brakes: Drum brakes (advantages and disadvantages of drum brakes), disc brakes, etc.

6

3

Share

What is the standard for measuring brake disc runout?

Brake disc runout is measured with a standard of flatness deviation exceeding 0.05 millimeters. Below is relevant information about automotive braking systems: 1. Introduction to Braking: Braking, also known as deceleration, refers to the action of stopping or reducing the speed of moving locomotives, vehicles, other transportation tools, or machinery. The general principle of braking involves fixing a wheel or disc on the high-speed shaft of the machine and installing corresponding brake shoes, bands, or discs on the machine base to generate braking torque under external force. The braking device is a mechanical deceleration system, also known as a retarder. 2. Classification of Braking Systems: Drum brakes (advantages and disadvantages), disc brakes, etc.

13

5

Share

What does 15gw mean?

15gw means GW is a unit (1GW=1000MW, 1MW=1000KW), which equals 15,000,000KW. The following is relevant information about automobiles: 1. Definition of automobile: According to China's latest national standard "Terms and Definitions of Motor Vehicles and Trailers" (GB/T3730.1-2001), an automobile is defined as: a non-track vehicle powered by an engine, with four or more wheels, mainly used for transporting people and/or goods; towing vehicles carrying people and/or goods; or for special purposes. 2. Introduction to domestic automobile brands: Domestic automobile brands include Hongqi, Changan, Great Wall, Chery, Geely, Roewe, BYD, etc.

19

4

Share

What is the concept of 1500mpa?

1500mpa refers to the concept of a car body having strong compressive resistance. The following is an introduction to automobiles: 1. Definition of an automobile: According to the latest national standard of China, "Terms and Definitions of Types of Automobiles and Trailers" (GB/T3730.1—2001), an automobile is defined as a non-track vehicle powered by an engine, with four or more wheels, mainly used for transporting people and/or goods; towing vehicles carrying people and/or goods; or for special purposes. 2. Introduction to domestic automobile brands: Domestic automobile brands include Hongqi, Chang'an, Great Wall, Chery, Geely, Roewe, BYD, etc.

17

0

Share

Should I generally use 92 or 95 octane gasoline?

What Causes the Smell of Gasoline When Starting a Car?

Where to Recycle Three-Way Catalytic Converters?

Does a squeaking sound mean the brake pads need to be replaced?

What is the standard for measuring brake disc runout?

What does 15gw mean?

What is the concept of 1500mpa?

Is Nissan French or Japanese?

Should the Mercedes S350 use 95 or 98 octane gasoline?

Which side should you overtake from when driving a motor vehicle?

What Causes Difficulty in Engaging Third and Fourth Gears?