Dongfeng LoongGine Engine parts pressure sensor exhaust pipe with connector assembly 3541130-E9300

As an integrated assembly combining an exhaust pipe pressure sensor and a dedicated connector, its core function is to accurately collect exhaust gas pressure data from the engine’s exhaust pipe and transmit stable signals to the ECU for real-time engine control. It operates on the piezoresistive sensing principle: the built-in pressure-sensitive silicon chip deforms when exposed to exhaust gas pressure, altering its electrical resistance. This resistance change is converted into a standard analog signal (0.5-4.5V DC) via the assembly’s internal signal processing module. The integrated connector then transmits this signal to the ECU without signal loss—unlike separate sensor-connector setups that risk signal interference. The ECU uses this data to adjust critical parameters (e.g., turbocharger boost pressure, EGR valve opening, fuel injection quantity), optimizing engine power, fuel efficiency, and emission compliance (meeting China’s National VI emission standards)

The assembly features a integrated, robust design with material selection optimized for harsh exhaust environments:

Exhaust Pipe Sensing Interface: The pipe-mounted sensing probe is made of heat-resistant stainless steel (316L), capable of withstanding continuous high temperatures up to 350℃ (the maximum exhaust temperature of LoongGine engines) and resisting corrosion from exhaust gas byproducts (e.g., sulfur oxides). The probe’s thread (M16×1.5) is precision-machined for tight sealing with the exhaust pipe, preventing exhaust gas leakage.

Sensor Housing: The sensor body uses high-strength engineering plastic (PA66+GF30) with flame-retardant and anti-aging properties, protecting internal circuits from engine compartment vibrations and oil contamination.

Integrated Connector: The connector adopts a IP67 waterproof/dustproof design with a rubber sealing ring and snap-in locking structure. It is made of PBT plastic (heat-resistant up to 150℃) to ensure stable signal transmission even in high-temperature, humid engine environments, and the terminal pins are plated with tin-copper for anti-corrosion and low contact resistance

Tailored to meet the rigorous demands of diesel engine operation, the assembly boasts reliable performance metrics:

Pressure Measurement Range: Covers 0-1.2 MPa, fully matching the normal exhaust pressure range of Dongfeng LoongGine engines (0.2-1.0 MPa under full-load conditions) and providing a safety margin for extreme working scenarios (e.g., uphill driving with heavy loads).

Measurement Accuracy: ±2.0% FS (Full Scale), ensuring minimal signal deviation—critical for the ECU to avoid control errors (e.g., unstable idle speed, excessive fuel consumption).

Response Time: ≤80 ms, enabling rapid feedback of sudden exhaust pressure changes (e.g., during acceleration) to support real-time engine adjustment.

Environmental Resistance: Operates stably in temperatures ranging from -40℃ to 120℃ (sensor housing) and resists oil, coolant, and dust ingress (per IP67 standard), maintaining performance in harsh conditions like cold northern winters or dusty construction sites

The assembly is widely applied in Dongfeng LoongGine-powered vehicles and machinery, including:

Dongfeng heavy-duty trucks for long-distance cargo transportation (where fuel efficiency and emission compliance are critical for fleet operations);

Medium-duty trucks and urban buses (requiring stable performance under frequent stop-start cycles);

LoongGine-equipped engineering machinery (e.g., excavators, wheel loaders) operating in high-vibration, high-temperature, and dusty environments.

In terms of installation, it offers significant advantages:

Integrated "Plug-and-Play" Design: Combining the sensor, exhaust pipe interface, and connector into one assembly eliminates the need for separate wiring or adapter installation. It directly replaces the original part, matching the exhaust pipe’s mounting points and ECU connector—no modifications to the engine or exhaust system are required.

Simplified Installation Process: Using standard tools (e.g., torque wrench for the probe thread, pliers for connector locking), installation can be completed in 25-35 minutes, reducing maintenance time compared to split-component setups.

Pre-Calibrated & Reliable: The sensor is factory-calibrated to LoongGine’s engine parameters, ensuring accurate performance out of the box. Under normal use, it has a service life of over 80,000 km, lowering replacement frequency and maintenance costs for users