Shandong Shengyue Technology Development Co.,Ltd is one of the most professional dongfeng truck throttle switch 37n-50140-a (jk203) manufacturers and suppliers in China. Please feel free to buy high quality genuine auto parts at competitive price from our factory.
Dongfeng TRUCK Throttle Switch 37N-50140-A (JK203)
FUNCTION
1. Signal Conversion: Translates the driver's physical action of depressing the accelerator pedal into electrical voltage signals, transmitting them in real-time to the engine control unit (ECU) to precisely regulate fuel injection volume and engine speed.
2. Dual-Channel Redundancy: Features two independent internal signal channels that cross-verify each other. Should one channel fail, the system automatically activates a backup mode to prevent a loss of vehicle control.
3. Critical State Detection:
Idle Detection: Upon release of the pedal, signals the ECU to enter the idle state.
Full-Load Detection: When the pedal is rapidly depressed to the floor, transmits an "urgent acceleration" signal to trigger maximum power output (e.g., for overtaking or hill climbing).
4. Fault Protection: Upon detecting any anomaly, the system immediately illuminates the fault indicator light and forces the vehicle into "Limp Mode" (limiting speed to a safe, low level), ensuring the vehicle can be safely driven to a service facility.
Installation Location
It is installed directly on the cab floor, near the accelerator pedal's mounting bracket or pivot shaft.
Connection Method:
Mechanical Linkage: This switch is typically connected to the accelerator pedal's pivot shaft via a connecting rod, a rocker arm, or a direct snap-fit mechanism.
Follower Principle: When the pedal is depressed, the pedal shaft rotates; this rotation drives an internal cam or contact within the switch to move in tandem, thereby triggering a signal.
Performance Advantages
| Advantage Dimension | Core Technical Feature | Actual Performance & Value |
|---|---|---|
| 1. Safety Redundancy | Dual-channel independent signal design (Main signal + Reverse linear backup signal) |
• Fault Tolerance: Automatically switches to backup signal if one channel fails. • Loss-of-Control Prevention: Forces "limp-home mode" to ensure safe low-speed exit. • Compliance: Meets China IV/V/VI emission and safety standards. |
| 2. Control Precision | High-precision Hall/Resistor sensor (Linearity 0.5V-4.5V) |
• No Dead Zones: Smooth signal transition from 0% to 100% throttle opening. • Smooth Start: Precise control of minimal fuel injection to prevent jerking. • Rapid Response: Instant power delivery for overtaking or acceleration. |
| 3. Functional Integration | Analog + Digital Dual-Mode (Integrated idle/full-load micro-switches) |
• Smart Idle: Triggers idle signal instantly upon release to prevent stalling. • Power Burst: Full-load switch activates on full depression for instant torque boost. • Compact Design: Reduces wiring nodes, lowering failure rates. |
| 4. Environmental Adaptability | High Protection (IP67) + Vibration Resistance | • Rugged Design: Withstands long-term vibration, extreme temperatures (-40°C to 85°C). • EMI Shielding: Shielded harness ensures clean, error-free signals. • Long Lifespan: Wear-resistant materials reduce replacement frequency. |
| 5. Maintenance Efficiency | Standard OEM Match + Diagnostic Friendly | • Plug-and-Play: No complex modification needed; quick calibration after replacement. • Clear Diagnostics: Supports standard fault codes (e.g., P0120, P2138) for rapid troubleshooting. • Reduced Downtime: Shortens repair time, boosting vehicle operational efficiency. |
DETAILS
| DESCRIPTION | Throttle Switch | PART NUMBER | 37N-50140-A (JK203) |
| WEIGHT |
0.5KG |
VOLUME | 150mm x 70mm x 50mm |
| TRUCK MOLDE | SINOTRUK | QUALITY | Copy,High Copy, OEM,Original |
| MOQ | 1 | WARRANTY | 1 year |
| PAYMENT | TT/WESTEN UNION | SHIPMENT | by air/sea/railway |
| BRAND | SINOSACHS | PLACE OF ORIGIN | JINAN CITY,CHINA |
| STOCK | IN STOCK | APPLICABLE SITE | CABIN |
| PACKAGE | Carton/Woodenbox | PORT OF LANDING | Qingdao Port,China |
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