Dominion Parts
Dominion Parts
Explore our high-performance system configurations, precision-manufactured parts, and industrial filtration solutions built for strict OEM specifications.
Designed for global B2B procurement officers. We address raw delivery pipelines, engineering validation, system cost matching, and high-level compliance.
Strict implementation of IATF 16949 systems, comprehensive batch-level traceability, and meticulous inbound sampling protocols to ensure stable, reliable operation.
Safety stock planning for core SKUs allows us to prioritize urgent procurement orders with rapid global shipping methods.
Over 10 senior application engineers match systems based on dynamic engine models, OEM reference numbers, or 3D schematics.
Flexible commercial terms (DDP, FOB, EXW, CIF) with complete export compliance documentation, customs declaration support, and tax handling.
ISO/CE certification with active deployments in mining excavators, port cranes, diesel power grids, and high-vibration off-road equipment.
Reduce Total Cost of Ownership (TCO) with OEM-level reliability. Maintain competitive price margins without sacrificing component operational lifespan.
Broad industrial component scope across heavy drivetrains, engine mechanics, and high-pressure injection systems.
From custom cylinder heads to crankshafts, pistons, valves, and manifold systems engineered for heavy-duty industrial application standards.
Fully assembled industrial power plants and matching auxiliary systems designed for remote mining setups, generators, and construction drives.
Durable components engineered for track-driven machinery, material handlers, earthmovers, and harsh environmental profiles.
High-integrity hydraulic pumps, sealing gaskets, precision bearings, and custom valves configured for continuous load profiles.
Fuel injectors, common rail electronics, matching high-pressure pumps, and precision sensors designed for modern low-emission powertrains.
Equipped with robotic CNC cells, high-capacity foundry lines, and international quality management certifications.
Advanced foundry equipped with German KW sand molding, low-pressure, high-pressure, and gravity casting lines. Annual capacity exceeds one million units of engine blocks and housings.
30 automated lines with 1,000+ CNC machining centers, precision honing rigs, and automated robotic loaders to ensure dimensional tolerances of +/- 0.005mm.
German-imported LEITZ CMM systems, SPECTRO chemical analyzers, Talyrond profile systems, and VDA 6.3-certified laboratories to verify raw material composition and design compliance.
With three decades of proven engineering history, Dominion specializes in manufacturing high-precision powertrain and control components, including custom Throttle Position Sensors (TPS).
Our plants integrate advanced materials science with strict Quality Assurance protocols, making us a key supplier for automotive, agricultural, industrial, and high-vibration marine applications.
A Throttle Position Sensor (TPS) acts as a critical interface within modern electronic throttle control systems. It monitors the precise angular position of the throttle butterfly valve and transmits real-time electrical signals to the Engine Control Unit (ECU). Accurate readings are vital for fuel injection calibration, ignition timing, emission control, and transmission shift point mapping.
Historically, contact-based potentiometers were the industry standard, relying on physical wiper arms sliding across resistive carbon tracks. However, continuous friction causes mechanical wear, signal degradation, and eventual contact failure—particularly in high-vibration construction machinery and commercial vehicles.
The transition toward electrification and autonomous machines has reshaped the sensor landscape. At Dominion, our research and development teams focus on the following key areas:
While Hall-effect sensors rely on permanent magnets, they can be vulnerable to interference from stray magnetic fields generated by high-voltage electric vehicle (EV) drivetrains. Inductive sensors use high-frequency alternating currents in printed circuit board coils to detect metallic targets. This offers excellent magnetic immunity, making it ideal for hybrid electric vehicles (HEVs) and battery-powered powertrains.
Under ISO 26262 (Functional Safety for Road Vehicles), throttle systems must meet strict Automotive Safety Integrity Levels (ASIL-C or ASIL-D). Modern custom TPS designs incorporate dual redundant outputs. These channels operate in opposition—for instance, one output climbs from 0.5V to 4.5V while the second drops from 4.5V to 0.5V. If the curves do not match, the ECU immediately flags a fault and switches the engine to a safe limp-home mode, preventing unexpected acceleration.
Traditional analog voltage signals are susceptible to electromagnetic interference (EMI) and line resistance drops. Our roadmap prioritizes digital output protocols such as SENT (SAE J2716). This standard transmits diagnostic data alongside position signals, allowing the sensor to communicate sensor health, temperature, and internal calibration errors directly to the ECU.
Custom throttle position sensors are used across various heavy industries, each with unique performance requirements:
| Sector | Primary Challenge | Custom Solutions Required |
|---|---|---|
| Construction & Mining | High-amplitude vibrations, dust, mud, and water ingress. | IP69K sealing, reinforced PBT housings, and potting compounds. |
| Commercial Fleets | Long duty cycles, high uptime requirements. | Heavy-duty return springs, gold-plated contacts. |
| Marine Drivetrains | Saltwater corrosion, thermal shock. | 316 Stainless steel shafts, marine-grade epoxy seals. |
| Off-Road Powersports | Extremely compact spaces, high ambient heat. | Ultra-low-profile custom packaging, up to 150°C rating. |
As a leading custom TPS manufacturer based in China, Dominion leverages a mature industrial ecosystem to balance cost-efficiency with high quality. Our Industry 4.0 model relies on three key pillars:
Our proximity to major specialty polymer and magnetic component suppliers minimizes delays in raw material procurement. This integration reduces lead times for tooling, prototypes, and mass production runs compared to western facilities.
Each custom TPS is calibrated using automated optical inspection (AOI) and multi-point electrical testing. Advanced testing rigs cycle the sensors through their full angular range while verifying linearity under temperature extremes (-40°C to 150°C). This data is logged to ensure batch-level traceability.
Whether you require a low-volume pilot run for niche machinery or high-volume runs for automotive programs, our automated production lines can scale rapidly. This flexibility minimizes up-front investment while maintaining consistent unit costs.
Procuring custom electronic components globally requires clear communication, detailed documentation, and robust logistical execution. Dominion supports enterprise buyers with the following services:
Technical answers, design specifications, and ordering details for engineering and purchasing managers.
Explore our heavy-duty component inventory, including mechanical casting assemblies, replacement parts, and high-durability system gaskets.
