123ArticleOnline Logo
Welcome to 123ArticleOnline.com!

ALL >> Automobiles >> View Article

Types Of Engine Sensors

By Author: Stephens H Robertson
Total Articles: 39

Engine sensors in a vehicle are incorporated to provide the correct amount of fuel for all operating conditions. A large number of input sensors are monitored by the engine control unit. Today, sensor technology has become common in modern vehicles. Sensors enhance safety of the people - both on board and on road, control vehicle emissions and make vehicles more efficient. In this article, we will discuss different types of engine sensors used in modern vehicles.

Mass Air Flow Sensor (MAF)
The MAF sensor (electric sensor) is an integral part of the engine system. It is controlled by a computer. It is located in a plastic covering between the engine and the air filter.

The purpose of MAF is to calculate the amount of air intake by the engine, in terms of volume and density. For measuring the volume and density of air, the sensor uses either a hot wire or a heated filament. After the measurement, it sends a voltage signal to the computer. With this, the computer can calculate the right amount of fuel needed to maintain the correct fuel mixture for every operating condition. If there is any fault in the MAF sensor, it may result in rough idle, stalling and poor fuel economy.

Throttle Position Sensor (TPS)
The Throttle Position Sensor (TPS) is a variable resistor attached or mounted on the throttle body and is operated by moving along with the throttle shaft or spindle. The TPS changes the resistances as the throttle opens and closes, and sends a voltage signal to the computer showing the angle or position of the throttle. Thus, the TPS causes the Electronic Control Unit (ECU) to use the data to measure the engine load, fuel delivery adjust timing, acceleration, deceleration when the engine is idle or in wide open throttle, and then makes the changes according to the operating conditions. Fuel rate is either increased or decreased to achieve this.

Coolant Temperature Sensor (CTS)
The Coolant Temperature Sensor (CTS) is a temperature dependent variable resistor located on the cylinder head or intake manifold. The CTS is an important sensor and the operating strategy of the engine depends on the signal it sends. So, it is called the “master” sensor.

The CTS measures the internal temperature of the engine coolant. It also senses the changes in temperature and sends a voltage signal to the Powertrain Control Module (PCM) for determining whether the engine is cold or warming up, is at normal operating temperature or is overheating.

Oxygen Sensor
The oxygen sensor is located on the exhaust manifold. This sensor monitors the amount of unburned oxygen present in the exhaust. When the fuel mixture is rich, most of the oxygen is exhausted during the combustion. So, only a little unburned oxygen will be left out in the exhaust. Difference in the oxygen levels creates an electrical potential, which causes the sensor to generate a voltage signal. This helps the ECU to check the quality of fuel mixture to make the changes accordingly. The sensor output will be high if the fuel mixture is rich, and the sensor output will be low if the fuel mixture is lean.

Manifold Absolute Pressure Sensor (MAP)
The MAP is a key sensor as it senses the engine load. It is mounted on the intake manifold. It monitors the difference between the air pressure in the intake manifold and outside. This sensor responds to the vacuum in the intake manifold and generates a voltage signal accordingly. It then sends the signal to the PCM. The input of the sensor is used for adjusting the fuel mixture and ignition timing, according to the changes.

Engine Speed Sensor (ESS)
The ESS is a sensor attached to the crankshaft of the car's engine. It is different from vehicle speed sensor. The ESS is used for monitoring the engine speed. In other words, it is meant for assessing the speed at which the crankshaft spins.

Voltage Sensor
The voltage sensor monitors the system voltage of the vehicle and reports it to PCM so that it can rise the idle speed of the vehicle, if the voltage is dropping.

Engine sensors are an important technological innovation. They lead to better performance, better quality and more years of driving experience.

Airtex Fuel Delivery Systems is the leading aftermarket supplier of mechanical and electric fuel pumps and modular reservoir assemblies (MRA). For over 50 years, the Airtex brand has been the benchmark of fuel delivery and cooling system components. Airtex fuel pump is an OE replacement pump. Airtex electric fuel pump and mechanical pump models are available for old and new cars.

Total Views: 103Word Count: 755See All articles From Author

Automobiles Articles

1. Buying A Used Or Pre Owned Vehicles For Sale In Chicago
Author: JerryHaggertySr

2. How To Obtain Stress-free Car Financing In West Chicago
Author: haggertyford58

3. Choppers Modified From Old Harley Davidson Is Trending
Author: Levi Fysh

4. Experience Chauffer Service In Executive Cars Throughout London
Author: Toby Pratt

5. Save Big With Easy-run’s Fall Special!
Author: Al Freilich

6. Fordzero Down Lease Specialscheap Way To Drive New Ford Car
Author: haggertyford85

7. Cad, Cam, Cnc And Robots For Manufacturing In Future
Author: CAD, CAM, CNC And Robots For Manufacturing In Futu

8. Career Options And Job Opportunities For Mechanical Engineers
Author: Career Options And Job Opportunities For Mechanica

9. October Is National Transport Month
Author: Batteries & More

10. The 2017 Vw Golf Alltrack 135 Tdi: A Volkswagen Dealers Brief Overview
Author: Aaron Reddall

11. Important Things To Keep In Mind When Your Car Breaks Down
Author: Paul Zervos

12. E-rickshaws Are The Perfect Way To Keep Your City Green.
Author: Power Electric Vehicle

13. The Audi Car Dealers Miami Offer Certified Pre Owned Cars In Competitive Price
Author: sandyleonk

14. Top Three Reasons To Consider Outsourcing Your Cad Project
Author: Top Three Reasons To Consider Outsourcing Your CAD

15. For An Updated Speed — the Cummins’ Compound Turbo Way
Author: Rip Rook

Login To Account
Login Email:
Forgot Password?
New User?
Sign Up Newsletter
Email Address: