Search results
ryansautomotive.ie
- The EGR valve is placed on the exhaust manifold side for several reasons: keeps the additional volume of gas in the exhaust manifold, due to extra ducts, as minimum as possible in order to minimise the influence on the pressure waves; this preserves the kinetic energy of the exhaust gases, which translates into faster response of the turbocharger
x-engineer.org/exhaust-gas-recirculation-egr-architectures/Exhaust Gas Recirculation (EGR) complete guide - x-engineer.org
People also ask
Why is the EGR valve located on the exhaust manifold side?
What is an EGR valve?
Where is the EGR located in a car?
What is a high pressure EGR system?
How does a PCM control EGR flow?
Why do EGR valves fail?
The EGR valve is usually on a pipe that connects the exhaust manifold or intake manifold. The valve is typically at the top of the engine’s rear near the firewall on vehicles with a carburetor. To access the valve, you must disconnect the car battery’s negative terminal.
- High Pressure EGR
- Low Pressure EGR
- Hybrid (Combined), Dual Loop EGR
- Dedicated EGR
High pressure EGR, compared with a low pressure EGR system, is referred to as the “classic” EGR architecture. This architecture is the most widespread and has been used on diesel engines starting with Euro 2 pollutant emissionlimits. In a high pressure EGR system, the exhaust gas is taken before the turbine and reintroduced into the intake manifold...
Euro 6 standard reduced the NOxemissions limit to only 80 mg/km in the NEDC cycle, compared with 180 mg/km for Euro 5. This significant drop has imposed an increase of the EGR rates and the introduction of low pressure EGR systems. In a low pressure EGR system, the exhaust gas is taken after the turbine and reintroduced into the intake manifold bef...
Hybrid (combined) EGR system integrates both high pressure EGR and low pressure EGR on the same engine. This type of EGR architecture is also called dual loop EGR system. The advantage of this architecture is that combines the benefit of both low and high pressure EGR systems, switching between them depending on the operating point of the engine (s...
In spark ignitions engines, high levels of EGR rates (more than 15%) increase fuel efficiency and reduce pollutant emissions. The drawback is that high EGR rates can cause incomplete combustion and increased hydrocarbons (HC) emissions. To overcome this, the combustion stability can be improved by supplementing the air charge with either pure hydro...
The main function of an EGR valve is to allow the exhaust gases to flow from the exhaust manifold into the intake manifold. The vast majority of valves in production, up until Euro 3 emissions standards, had an inward opening poppet valve operated by a vacuum actuator.
Gasoline EGR valves divert the exhaust gases, much like the high pressure diesel equivalent. The vacuum created by cylinder depression, draws the exhaust gases in and the flow is regulated by the opening and closing of the EGR valve itself.
Oct 3, 2019 · How the engine computer or PCM controls the EGR system flow: The engine computer (PCM) opens or closes the EGR valve to control the flow within the EGR system. The EGR valve connects the exhaust manifold to the intake manifold.
Jun 4, 2024 · The EGR is usually located on the inlet manifold of the engine, although sometimes it can be located lower down near the exhaust manifold. It operates by recirculating exhaust gas back into the engine through the intake.
Aug 8, 2019 · You’ll always find the EGR valve on the intake manifold. This is a major component of your engine, so finding it shouldn’t be too hard when you know what you’re looking for. Open up the hood of your vehicle and look at the top side, closest to the windshield.
