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What Components Make Up an Electronically Controlled Fuel Injection System?

1 Answers

DeParker

07/30/25 3:49am

Electronically Controlled Fuel Injection System, commonly known as EFI (Electronic-Fuel-Injection), is colloquially referred to as gasoline injection. It primarily consists of three major components: the air supply system (air circuit), the fuel supply system (fuel circuit), and the control system (electrical circuit). Below is a detailed introduction to each component: 1. Main function of the air supply system: To provide the necessary air for the engine and control the air supply during normal operation. It generally includes components such as the air filter, throttle valve, air valve, intake manifold, and intake pipe. Additionally, to regulate the air intake as needed, the intake system is equipped with an air intake detection device. 2. Main function of the fuel supply system: The fuel injector supplies the required fuel for combustion to the cylinder, and the injector sprays fuel based on computer commands. It typically consists of the fuel tank, fuel pump, fuel filter, pressure regulator, and fuel injector. 3. Main function of the control system: Based on signals from various sensors, the computer performs comprehensive analysis and processing, controlling fuel injection volume and other parameters through actuators to ensure optimal engine performance. The control system mainly comprises sensors, input/output circuits, and a microcomputer, with the ECU (Engine Control Unit) serving as the core of the control system.

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What brand is Nitto?

Nitto's full name is Nitto Tire, known as NittoTire in Chinese. Here is more information about Nitto Tire: 1. Nitto Tire was established in the 1940s, primarily producing automotive tire products. In the 1970s, Nitto Tire entered the U.S. market and set up its first tire sales center in California. 2. Nitto Tire's product catalog mainly provides tire products for three types of vehicles: off-road vehicles, street cars, and racing cars. Among them, the off-road vehicle tires include four models: Dragon Claw (MT), Stone Fist (MT), Iron Python (AT), and Sky Rope (HT).

Will a Dash Cam Record When Turned Off?

A dash cam will not record when turned off. However, if it is equipped with parking monitoring functionality, the dash cam will automatically power off when the vehicle is turned off. If the vehicle experiences an impact or detects movement in front of it, the parking monitoring feature will immediately activate and record the surrounding footage. In this scenario, even if the dash cam is turned off, it may still capture video recordings. Below is more information about dash cams: 1. A dash cam is a device that records video and audio data during vehicle operation. 2. The primary function of a dash cam is similar to an aircraft's black box. Installing a dash cam helps traffic police accurately and quickly handle accidents, enabling faster clearance of the scene and smoother traffic flow.

What Causes an Automatic Transmission to Fail to Shift into D Gear?

Introduction to the causes and solutions for an automatic transmission failing to shift into D gear: 1. Malfunction in the shift lever assembly: The solution is to have the vehicle repaired at a 4S shop to fix the shift lever assembly. 2. Failure of the P-gear lock solenoid valve inside the shift lever and malfunction of the brake switch: The solution is to have the vehicle repaired at a 4S shop to fix the solenoid valve and brake switch. Note: When the shift lever is in the D gear position, the gears inside the transmission automatically switch between the lowest and highest gears based on factors such as vehicle speed and throttle opening, following the preset shifting pattern. In most cases, the D gear can be used for driving.

What does the S gear in an automatic transmission car represent?

S gear stands for Sport mode. When the gear is shifted to S position, the transmission can shift freely, but the shifting timing is delayed, keeping the engine at high RPM for a longer period. This allows the car to operate at lower gears with higher RPM for extended durations, resulting in greater torque output and acceleration. Here is more information about S gear: 1. Due to its powerful performance, S gear is typically used when overtaking or climbing hills. After completing these maneuvers, it's advisable to switch back to the more economical D gear, as S mode consumes significantly more fuel due to increased fuel injection at high RPM. It also causes more wear on the transmission and isn't necessary for daily driving. 2. Although S gear isn't used frequently, it does have benefits for the vehicle. Cars that often drive in congested urban areas tend to accumulate more carbon deposits in the engine. Periodically using S gear helps remove these deposits, improving fuel economy and extending engine life.

What is the best mileage for the first car maintenance?

New car first maintenance is at three months or 5,000 kilometers, whichever comes first. The items for the first car maintenance include the following: 1. Change the engine oil and oil filter. Since the period before the first maintenance is the running-in period of the vehicle, the gradually running-in engine will mix mechanical impurities such as dust, metal wear, and carbon deposits into the engine oil during operation. Changing the engine oil and oil filter during the first maintenance is crucial. If the debris and impurities generated by the engine operation are not removed in time, it may cause abnormal damage to the internal parts of the cylinder. 2. Tighten the nuts. During the first maintenance of a new car, the nuts in various parts of the car should be checked. This is because many vehicles leave the factory with some screws not particularly tight. During the first maintenance, the screws will be tightened according to the specified torque. 3. Chassis inspection. During the first maintenance, the car will be lifted to check the chassis for scratches, bottoming, corrosion, oil leakage, etc. 4. Tire inspection. Mainly check whether the tire wear is consistent. If the wear is severe, it means the vehicle may have a tendency to deviate. In addition, tire pressure should be checked and appropriately supplemented. 5. Computer system check. Through the computer system check, car problems can be comprehensively detected.

How Often Should Clutch Plates Be Replaced?

Automobile clutch plates do not have a fixed replacement cycle. Their service life is largely related to the driver's habits and road conditions. Generally, clutch plates are replaced every 100,000 kilometers. The following situations indicate that the clutch plates need to be replaced: 1. When the vehicle is parked and does not stall during a hill start: First, park the vehicle, engage the handbrake, start the engine, and shift into second gear to simulate a hill start. Gently press the accelerator while slowly releasing the clutch. Normally, the vehicle should stall immediately. If the vehicle hesitates for 3 to 5 seconds before stalling or does not stall at all, it indicates that the clutch plate is worn thin and is slipping. 2. Severely worn clutch plates, due to poor engagement and slipping, will cause a lag in the matching between the engine and transmission, with the RPM dropping very slowly. 3. While driving, shift into fourth gear and release the clutch. If the RPM takes more than 2 seconds to drop, it's a sign of clutch plate wear.

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