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Automobile Engineering
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Automobile Engineering (English)
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Automobile Engineering
23 Oct, 05:12
Comprehensive list of parameters related to an engine, its systems, and sensors:
1. Electrical Parameters
Resistance:
Starter Motor Solenoid: 0.4 to 2 ohms
Ignition Coil Primary: 0.5 to 2 ohms
Ignition Coil Secondary: 6,000 to 15,000 ohms
Coolant Temperature Sensor: Changes based on temperature (e.g., 200-500 ohms at high temp)
Crankshaft Position Sensor: Varies depending on the sensor (500-1,500 ohms)
Oxygen Sensor Heater Circuit: 4 to 40 ohms
Throttle Position Sensor: Typically 1-10 ohms
Voltage:
Battery Voltage: 12.6V (fully charged) / 14.0-14.5V (when charging)
Sensor Output (e.g., TPS, MAP): 0.5 to 4.5V
Current:
Starter Motor Draw: 100-200 amps (depending on engine size)
Fuel Pump Current: Typically 5-10 amps
2. Pressure Parameters
Fuel Pressure:
Petrol Engine (Fuel Injected): 30-60 psi
Diesel Engine (Common Rail): 20,000 to 30,000 psi
Oil Pressure:
At Idle: 10-20 psi
At Higher RPM: 40-70 psi
Manifold Absolute Pressure (MAP): 0.5 to 1.5 bar (7-22 psi)
Exhaust Backpressure: Typically below 3 psi, but depends on engine and load
3. Vacuum Parameters
Intake Manifold Vacuum:
At Idle (Petrol Engine): 17-22 inHg (inches of Mercury)
During Deceleration: Up to 25 inHg
Brake Booster Vacuum: Similar to intake manifold vacuum, typically 17-22 inHg
EGR System Vacuum: 15-20 inHg when EGR valve is activated
4. Temperature Parameters
Engine Coolant Temperature:
Operating Range: 190°F to 220°F (88°C to 105°C)
Exhaust Gas Temperature (EGT):
Petrol Engine: 1,300°F to 1,600°F (700°C to 870°C)
Diesel Engine: 600°F to 1,200°F (315°C to 650°C)
Intake Air Temperature (IAT): Typically between 30°F to 120°F (-1°C to 50°C), depending on ambient conditions
5. Airflow and Mass Parameters
Mass Air Flow (MAF) Sensor:
Typical Output: 2 to 7 grams/sec at idle, 15 to 30 grams/sec at higher RPMs
Throttle Airflow: Variable, based on throttle position and engine load
6. Position and Speed Parameters
Crankshaft Position Sensor:
Rotational Speed: Typically 700 to 3,500 RPM (varies with engine type)
Camshaft Position Sensor: Similar to crankshaft sensor but operates once per engine cycle
Vehicle Speed Sensor (VSS): Pulses based on wheel rotation, often 8,000 to 10,000 pulses per mile
7. Other Parameters
Oxygen Sensor Voltage:
Upstream (Pre-Cat): 0.1 to 0.9V (switching between lean and rich conditions)
Downstream (Post-Cat): Steadier voltage, close to 0.45V
Knock Sensor Output: Varies based on engine knock, typically 0.5 to 3.5V
This list covers a wide range of parameters and sensor readings that are commonly measured in automotive engines, especially in fuel-injected and electronically controlled engines like MPFI systems.
1. Electrical Parameters
Resistance:
Starter Motor Solenoid: 0.4 to 2 ohms
Ignition Coil Primary: 0.5 to 2 ohms
Ignition Coil Secondary: 6,000 to 15,000 ohms
Coolant Temperature Sensor: Changes based on temperature (e.g., 200-500 ohms at high temp)
Crankshaft Position Sensor: Varies depending on the sensor (500-1,500 ohms)
Oxygen Sensor Heater Circuit: 4 to 40 ohms
Throttle Position Sensor: Typically 1-10 ohms
Voltage:
Battery Voltage: 12.6V (fully charged) / 14.0-14.5V (when charging)
Sensor Output (e.g., TPS, MAP): 0.5 to 4.5V
Current:
Starter Motor Draw: 100-200 amps (depending on engine size)
Fuel Pump Current: Typically 5-10 amps
2. Pressure Parameters
Fuel Pressure:
Petrol Engine (Fuel Injected): 30-60 psi
Diesel Engine (Common Rail): 20,000 to 30,000 psi
Oil Pressure:
At Idle: 10-20 psi
At Higher RPM: 40-70 psi
Manifold Absolute Pressure (MAP): 0.5 to 1.5 bar (7-22 psi)
Exhaust Backpressure: Typically below 3 psi, but depends on engine and load
3. Vacuum Parameters
Intake Manifold Vacuum:
At Idle (Petrol Engine): 17-22 inHg (inches of Mercury)
During Deceleration: Up to 25 inHg
Brake Booster Vacuum: Similar to intake manifold vacuum, typically 17-22 inHg
EGR System Vacuum: 15-20 inHg when EGR valve is activated
4. Temperature Parameters
Engine Coolant Temperature:
Operating Range: 190°F to 220°F (88°C to 105°C)
Exhaust Gas Temperature (EGT):
Petrol Engine: 1,300°F to 1,600°F (700°C to 870°C)
Diesel Engine: 600°F to 1,200°F (315°C to 650°C)
Intake Air Temperature (IAT): Typically between 30°F to 120°F (-1°C to 50°C), depending on ambient conditions
5. Airflow and Mass Parameters
Mass Air Flow (MAF) Sensor:
Typical Output: 2 to 7 grams/sec at idle, 15 to 30 grams/sec at higher RPMs
Throttle Airflow: Variable, based on throttle position and engine load
6. Position and Speed Parameters
Crankshaft Position Sensor:
Rotational Speed: Typically 700 to 3,500 RPM (varies with engine type)
Camshaft Position Sensor: Similar to crankshaft sensor but operates once per engine cycle
Vehicle Speed Sensor (VSS): Pulses based on wheel rotation, often 8,000 to 10,000 pulses per mile
7. Other Parameters
Oxygen Sensor Voltage:
Upstream (Pre-Cat): 0.1 to 0.9V (switching between lean and rich conditions)
Downstream (Post-Cat): Steadier voltage, close to 0.45V
Knock Sensor Output: Varies based on engine knock, typically 0.5 to 3.5V
This list covers a wide range of parameters and sensor readings that are commonly measured in automotive engines, especially in fuel-injected and electronically controlled engines like MPFI systems.
Automobile Engineering
21 Oct, 07:39
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