How Does a Fuel Gauge Work?

1 Answers
BrantleyAnn
07/29/25 11:22am
Automobile fuel gauge operates as follows: a float is installed in the fuel tank. As the fuel level decreases, the float on the fuel surface also descends, thereby driving the fuel gauge's pointer to indicate the remaining fuel. Working principle of the fuel gauge: The movement of the fuel gauge pointer is controlled by the amount of current passing through a variable resistor. When the fuel tank is full, the float-metal rod-wiper combination results in a low resistance value of the variable resistor. With the switch turned on, a large current flows, causing the fuel gauge pointer to rise significantly. Conversely, when the fuel tank is empty, the float-metal rod-wiper combination leads to a high resistance value of the variable resistor, resulting in a small current flow, which causes the fuel gauge pointer to drop. Main components of the fuel gauge: The fuel gauge primarily consists of two main parts: the measurement unit and the display unit. The measurement unit is responsible for measuring the fuel quantity in the tank, while the display unit shows the fuel quantity on the fuel gauge.
Was this review help?
11
4
Share
More Forum Discussions

What is the range of the BYD Han?

The range of the BYD Han is 550 kilometers. The BYD Han is a mid-to-large-sized 4-door 5-seater sedan with body dimensions of 4960mm in length, 1910mm in width, and 1495mm in height, with a wheelbase of 2920mm. It features front-engine four-wheel drive, with a front MacPherson strut independent suspension and a rear multi-link independent suspension. The BYD Han is equipped with a 245-horsepower permanent magnet synchronous single motor and a 6-speed dual-clutch transmission, delivering a maximum power of 321 kilowatts and a maximum torque of 650 Newton-meters. The rear motor has a maximum power of 180 kilowatts and a maximum torque of 330 Newton-meters.
18
2
Share

What are the hazards of installing a radiator bug screen?

Generally, it affects heat dissipation. Here are the relevant explanations: 1. Reason for affecting heat dissipation: Because the radiator bug screen is a very fine protective mesh, its installation will inevitably affect the radiator's ability to cool through airflow impact, leading to a decrease in the radiator's heat dissipation efficiency. 2. Specific hazards: These protective screens are usually quite fine and are installed in front of the radiator, effectively blocking many debris. However, precisely because of their fineness, they can obstruct the radiator when the vehicle is in motion. In other words, while the radiator could originally cool through the high-speed airflow generated by the vehicle's movement, the presence of this protective screen weakens the airflow. As a result, the radiator's heat dissipation efficiency is directly reduced.
15
3
Share

Is the Mercedes-Benz G-Class Equipped with a Column Shifter?

Mercedes-Benz G-Class is equipped with a column shifter. Below is relevant information about column shifters: 1. Definition: A column shifter gets its name because the gear lever is pulled towards the driver's chest when shifting. There are two types of gear lever arrangements in cars: floor-mounted shifters and column shifters. A column shifter refers to the gear lever located at the lower right side of the steering wheel. The gear arrangement pattern is the same as that of a conventional automatic transmission. Most common column shifters are found in automatic transmission vehicles. 2. Common Models: In China, commonly seen American cars with column shifters include the Buick GL8 and older Regal models. German Mercedes-Benz also frequently uses column shifters, such as in the C, E, R, S, ML, and GL series. The three currently available models under the British Rolls-Royce brand (Phantom, Ghost, Wraith) also use column shifters.
14
4
Share

What Are the Insurance Company's Standards for Door Replacement?

The standard for door replacement must be agreed upon by both parties. If an agreement cannot be reached, the matter can only be resolved by filing a lawsuit in court, where a professional appraisal agency will be commissioned to determine whether replacement is necessary. Below are the relevant details: 1. Insurance Claims: Insurance claims refer to the process where, in the event of an insured incident causing property damage or personal injury to the policyholder, or when other insured incidents specified in the policy require payment of insurance benefits, the insurance company fulfills its obligation to compensate or pay according to the contract. This directly reflects the function and responsibility of insurance. In case of an accident, the insurance company will compensate according to the contract terms. If the compensation is deemed unreasonable, legal action can be pursued. 2. Specific Standards: Minor paint damage or slight deformations typically do not qualify for replacement, as they can be easily repaired and restored. Replacement is only considered when the damage is severe, such as significant bending or deformation that is difficult to restore through repair, or when the repair process is excessively complex.
19
4
Share

How to open the fuel tank cap of the Trumpchi GS5?

The method to open the fuel tank cap of the Trumpchi GS5 is: Press the fuel tank cap switch button located below the left side of the steering wheel, and the fuel tank cap will automatically pop open. The Trumpchi GS5 is a mid-size 5-door, 5-seat SUV with body dimensions of: length 4695mm, width 1885mm, height 1726mm, wheelbase 2710mm, and a fuel tank capacity of 55 liters. The Trumpchi GS5 is equipped with a 1.5T turbocharged engine and a 6-speed automatic transmission, delivering a maximum power of 124 kW and a maximum torque of 265 Nm. It features front-wheel drive, with a front suspension using MacPherson independent suspension and a rear suspension using multi-link independent suspension.
3
0
Share

What is the idle speed of the Baojun 510?

Baojun 510's idle speed is between 550 and 800 RPM. The Baojun 510 is a compact 5-door, 5-seat SUV with the following dimensions: length 4220mm, width 1740mm, height 1615mm, and a wheelbase of 2550mm. It features front-wheel drive, with a MacPherson strut independent front suspension and a torsion beam non-independent rear suspension. The Baojun 510 is equipped with a 1.5L naturally aspirated engine paired with a 6-speed manual transmission, delivering a maximum power of 73 kW at 5800 RPM and a maximum torque of 135 Nm between 3600 and 5200 RPM.
10
3
Share
Cookie
Cookie Settings
© 2025 Servanan International Pte. Ltd.