+ All Categories
Home > Automotive > Valeo - Electromagnetic valve actuation

Valeo - Electromagnetic valve actuation

Date post: 19-Jan-2015
Category:
Upload: valeo
View: 1,370 times
Download: 9 times
Share this document with a friend
Description:
The e-Valve system replaces the traditional camshaft system
Popular Tags:
1
The e-Valve system replaces the traditional camshaft system > Electromagnetic valve actuation © VALEO When the upper magnet is activated, the armature plate is held upright. The valve is in the closed position. The e-valve system operates each valve individually and independently of the crankshaft position and of the other valves. Magnet Cups CHARACTERISTICS n Fuel consumption reduced by 15-20 %. n CO2 emissions reduced by 15- 20 %. n Low-end torque increased by 15-20 %. n Optimization of air-fuel mixture. n Each engine valve operates independently from the others and independently from the piston position. When the upper magnet’s magnetic field is disrupted, the armature plate is pulled downward by springs. Actuation of the lower magnet maintains the valve in the opened position. Armature plate attached to the valve stem Springs Valve Decompression Actuator The flexible e-Valve system allows infinitely variable valve timing and valve opening duration. This control flexibility increases torque at low engine speeds and optimizes engine output when instant power is required. Compression The total independence of each valve allows the deactivation of some cylinders at low engine speeds. Therefore, the engine runs with half of the cylinders, with two cylinders instead of four cylinders in a 4 cylinder engine.
Transcript
Page 1: Valeo - Electromagnetic valve actuation

The e-Valve system replaces the traditional camshaft system> Electromagnetic valve actuation

© V

ALE

O

When the upper magnet is activated, the armature plate is held upright. The valve is in the closed position.

The e-valve system operates each valve individually and independently of the crankshaft position and of the other valves.

Magnet

Cups

CharaCTerisTiCsn Fuel consumption reduced by

15-20 %.n CO2 emissions reduced by 15-

20 %.n Low-end torque increased by

15-20 %.n Optimization of air-fuel mixture.n Each engine valve operates

independently from the others and independently from the piston position.

When the upper magnet’s magnetic field is disrupted, the armature plate is pulled downward by springs. Actuation of the lower magnet maintains the valve in the opened position.

Armature plate

attached to the

valve stem

Springs

Valve

Decompression

Actuator

The flexible e-Valve system allows infinitely variable valve timing and valve opening duration. This control flexibility increases torque at low engine speeds and optimizes engine output when instant power is required.

Compression

The total independence of each valve allows the deactivation of some cylinders at low engine speeds. Therefore, the engine runs with half of the cylinders, with two cylinders instead of four cylinders in a 4 cylinder engine.

Recommended