What does EGR stand for in automobiles?

[OLouis]

Automotive EGR stands for Exhaust Gas Recirculation system, which refers to redirecting a portion of the engine's exhaust gases back to the intake manifold, where they mix with fresh air-fuel mixture before re-entering the cylinders. The function of the EGR valve is to reduce nitrogen oxide emissions in the exhaust. Symptoms of a faulty EGR valve include: 1. Difficulty starting the engine and poor acceleration; 2. Failing emission tests during annual inspections; 3. Black smoke from the vehicle's exhaust pipe; 4. Unstable idle or stalling at idle; 5. Flashing check engine light; 6. Engine oil burning; 7. Increased fuel consumption. Causes of EGR valve failure: 1. Quality issues with the exhaust gas recirculation system itself; 2. Improper maintenance; 3. Problems with fuel quality; 4. Aging of the exhaust valve. The EGR valve, or Exhaust Gas Recirculation valve, is a mechatronic product installed on gasoline engines to control the amount of exhaust gas recirculated back into the intake system.

[DelRachel]

I've been driving for decades and know cars well. EGR stands for Exhaust Gas Recirculation system, which recirculates a portion of exhaust gases from the exhaust pipe back into the intake manifold for re-combustion. Its primary purpose is to lower combustion chamber temperatures and reduce harmful nitrogen oxide emissions, which is crucial in regions with strict environmental regulations. However, EGR valves often get clogged because carbon buildup can easily block the passages. Symptoms include unstable engine idle, such as shaking or misfiring, and possibly slightly increased fuel consumption. If the check engine light comes on, it indicates a problem that requires timely cleaning or part replacement. I always remind friends to regularly check fuel quality and avoid using poor-quality gasoline to prevent clogging. If left unrepaired, excessive emissions may damage the engine's internal structure. Addressing this promptly saves money in the long run and ensures safety.

[LeEmmett]

When I first started driving this car, I didn't know about the EGR system. Later, black smoke came out of the exhaust and the car lacked power. After taking it to the shop, I found out it was an EGR fault. Simply put, this system recycles some exhaust gases for reuse, which helps control exhaust pollution (good for the air) and also aids in smooth engine operation. However, if it gets clogged or the valve sticks, it can cause problems. The usual solutions are to remove and clean the carbon deposits or replace the part entirely. I recommend learning some basic knowledge so you don't panic if the warning light comes on—just take it for repairs. Overall, its purpose is designed by major automakers to meet emission standards, and it's commonly installed in new vehicles.

[AshlynFitz]

I value environmental protection and understand that the car's EGR system is designed to reduce nitrogen oxides in exhaust emissions, serving as an emission control device that enables cleaner and more efficient combustion. It works by recirculating a small portion of exhaust gases back into the engine for reburning, lowering temperatures and preventing pollution, which plays a significant role in the global push for green mobility. When functioning well, it helps meet emission standards and can even improve fuel efficiency slightly. However, neglecting maintenance—such as not changing the oil or allowing it to clog—can trigger warning lights and affect driving performance. My personal opinion is to pay attention to the latest advancements in this system when purchasing a car, contributing to a more sustainable society.