Technical Information · Finger Sensor : 1, 2, 3 or 4 Cables Signal Ground Signal Signal - + Heater...
Transcript of Technical Information · Finger Sensor : 1, 2, 3 or 4 Cables Signal Ground Signal Signal - + Heater...
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Technical Information
Lambda Sensor
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Why do cars have Lambda Sensor?
Engine works closer to Stoichiometric Mixture Less CO2 emission Reduction of Fuel consumption
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Storage Requirements
Relative Humidity : 0 to 60 % Stock Time : maximum 2 years Stock Temperature : - 40ºC to + 100 ºC Handle with care. The Sensors have fragile ceramic internal components.
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Lambda Concept
Lambda (λ) = Instantaneous A/F ratio
Stoichiometric A/F ratio
λ = 1 ideal ( signal = 450mV ) λ < 1 Lean mixture ( signal below 450mV ) λ > 1 Rich mixture ( signal above 450mV )
Stoichiometric A/F ratio for different fuels:
Gasoline 1 4.7 : 1 ( 14.7 parts of air to 1 part of gasoline ) Ethanol 9 : 1 ( 9 parts of air to 1 part of ethanol ) Diesel 15.2 : 1 ( 15.2 parts of air to 1 part of diesel )
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Sensor Signal for Lambda Factor
1 0,9 0,7 1,1 1,3
0
mV
100
200
300
400 450
500
600
700
800
900
Rich Mixture
Lean Mixture
Oxygen Sensor
Ideal Range
1000
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Operation
Rich Mixture Lean Mixture
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Installing Positions related to Catalytic Converter
1000 mV
0 mV
Before
After
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Finger Sensor : 1, 2, 3 or 4 Cables
Signal Ground Signal Signal
+ - Heater
+ - Heater
Signal
Ground
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Planar Sensor : 4 Cables
+ -
Heater
Signal Ground
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Finger
Planar
W G
B W
External differences - Finger X Planar
W W
B G
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Electrical differences - HEATER
Finger Planar
Integrated Heater
Resistance : 8 to 10 Ohms
Separated Heater
Resistance : 3 to 6 Ohms
(Some Toyota and Honda cars: 12 to 14 Ohms)
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Connections
COMPLETE with Connector UNIVERSAL without Connector
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Why?
• Coolant Sensor Failure • Engine Misfiring • Spark Plug Wire Failure • Spark Plugs Failure • Any Fuel Injection Malfunction • Valve Dripping • Fuel Pressure Regulator • Low Fuel Pump Flow • Ignition Timing not in Synch
CONTAMINATION
Carbonized Sensor RICH MIXTURE
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• Clogged Air Filter
CONTAMINATION - RICH MIXTURE
• Bad Spark Plug • Bad Spark Cables • Coil with misfire
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• Problems in the Electronic Injection
CONTAMINATION - RICH MIXTURE
• Defective MAF or MAF Sensors
• Misfires
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Why?
• Fuel Contamination • Lead (Pb) • Indicates Lean Mixture • Increased HC/CO emissions
CONTAMINATION
Silicon Poisoning
Why?
• Piston Rings Leaking • Blocked Air Filter • Delayed Lub Oil Exchange ? • Consumption above 0.7 L / 1.000 km
Oil saturation
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Filtro de ar
CONTAMINATION - OIL SATURATION
• Clogged Breather (PCV) or Blow-by
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CONTAMINATION
Why?
• Cylinder Head Gasket ? • Internal Coolant Leakages
Simptoms: • Indicates Rich Mixture • Reduces Signal Frequency
Anti-Freezing Poisoning
Why?
• Leaded Fuel
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Checking period = 40.000 km Useful Life Span* = 100.000 km
LIFE TIME WARRANTY
* The Lambda sensors are designed to last a Life Span of 200.000 Km in Cars with optimal condition Engines.
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Main Components
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Exclusive Design
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Exclusive Design
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The End