What is the difference between primary and secondary air?
What is the difference between primary and secondary air?
Definition. Primary air: Air supplied to the burner with the fuel that controls the rate of combustion as well as the amount of fuel that can be burned. Secondary: Air supplied to the combustion process that controls combustion efficiency; How completely the fuel is burned.
How does the secondary air system work in a car?
The secondary-air non-return valve stops exhaust gas, condensate or pressure peaks in the exhaust system (e.g. misfiring) causing damage to the secondary-air pump. The secondary-air shut-off valve ensures that secondary-air is only routed to the exhaust manifold in the cold starting phase.
What do you need to know about secondary air injection?
Although generic, the specific repair steps may vary depending on make/model. Secondary Air Injection is an emission control that uses an air pump (either electric or turned by the drive belt) to move fresh air into the exhaust manifold (s) or exhaust ports when the engine is in open loop and pre-catalytic converter when in closed loop.
What are the functions of a secondary air pump?
1 Air filter 2 Secondary-air pump 3 Secondary-air valve with shut-off and nonreturn function 4 Solenoid switching valve 5 Cylinder 6 Lambda sensor 7 Catalytic converter
Definition. Primary air: Air supplied to the burner with the fuel that controls the rate of combustion as well as the amount of fuel that can be burned. Secondary: Air supplied to the combustion process that controls combustion efficiency; How completely the fuel is burned.
Where is the secondary air filter on a car?
There is a separate integrated air filter if the air is not drawn in from the intake system but rather directly from the engine compartment. Secondary-air valves are fitted between the secondary-air pump and the exhaust manifold. Use is made of different versions.
What do you need to know about a secondary air pump?
If you’re wondering what a secondary air injection pump is, you’re not alone. In this article, we’ll go over the purpose of the secondary are pump as well as the symptoms you should watch for that indicate the pump is failing. What Does a Secondary Air Pump Do? What Does a Secondary Air Pump Do?
How to identify the secondary air engine on a Land Rover?
Watch Jim as he demonstrates how to identify the secondary air engine on Land Rover Discovery Series II 1999 – 2004 and Range Rover 4.0 and 4.6 1995 – 2002 model vehicles.
