Powertrain Systems

Delphi Mechanical Throttle Bodies and Electronic Throttle Controls for Small Engines control airflow to the engine. They feature a butterfly valve in the throttle body which opens and closes the passage into the intake manifold to increase or decrease the volume of incoming air.

• Delphi Mechanical Throttle Bodies offer a simpler alternative to electronic systems while maintaining excellent durability and reliability. They are mechanically linked to the accelerator and are constructed of aluminum or composite materials. Delphi Mechanical Throttle Bodies are also designed to provide the manufacturer with packaging flexibility.
  
• Delphi Electronic Throttle Controls are regulated by an electronic signal from the engine management system. They are designed to replace mechanical governor systems with electronic control capability. Delphi's Electronic Throttle Controls offer more precise system air control versus mechanical systems to enable application of advanced engine technologies that can help improve engine efficiency. They can be tailored to meet customer needs for airflow, response time and system feedback.

Delphi Mechanical Throttle Body with Integrated Throttle Position Sensor, Inlet Air Control and Manifold Absolute Pressure/Manifold Air Temperature Sensor is Delphi’s most highly integrated mechanical air control device. 

Delphi Mechanical Throttle Body Benefits

• Offers integrated idle air control options, including an Idle Air Control Valve (IACV) or an idle air control bypass adjustment screw
• Optional integrated sensors can be used for more advanced engine control and diagnostics:
• Throttle Position Sensor (TPS)
• Manifold Absolute Pressure/Manifold Air Temperature Sensor (MAP/MAT) Sensor
• Throttle control interfaces include cable over cam or multiple lever linkage

Delphi Electronic Throttle Controls Benefits

• No throttle cable routings provide enhanced packaging flexibility
• Non-contact sensor option provides increased durability and reliability compared to contact sensor designs
• Contact sensor is physically separated from the gearbox to avoid dust contamination of the sensor and reduce shaft position variation for improved warranty performance
• Stiff casting design helps minimize vibration for improved motor and sensor durability
• No metal-to-metal contact in the gear train helps reduce contamination in the gear train and the sensor
• Various bearing configurations are available (needle, ball, and brush) to meet specific customer design requirements
• Lip seal options improve sealing to help avoid moisture penetration
• Electronic technology enables the engine to respond faster to load changes (compared with mechanical governor systems)
• Electronics enable flexibility in program application; the same throttle body could be used in multiple engine programs
• This "high tech" feature can help enhance the technology imagery of the manufacturer’s small engine product
• Available in a wide range of bore sizes

Typical Applications

Delphi Mechanical Throttle Bodies and Electronic Throttle Controls for Small Engines are designed for one- and two-cylinder (In-Line and "V") gasoline engines, from 10 hp to 42 hp.  They can also be used in flexible fuel applications.

Delphi Mechanical Throttle Bodies and Electronic Throttle Controls for Small Engines can be used for motorcycles, motor scooters, commercial products such as lawn mowers and stationary power generators, power sports products such as all-terrain vehicles, and marine engines.

Performance Advantages

Delphi's Mechanical Throttle Bodies for small engine non-automotive applications are integral to electronic fuel injection systems, which offer a significant improvement in performance, fuel economy and emissions reduction compared to conventional carbureted systems.

Delphi is leveraging its experience as a leading manufacturer of automotive engine air control valves to develop the next generation of electronic throttle controls for non-automotive engine applications.  Delphi's Electronic Throttle Controls eliminate mechanical governor systems while, as part of an electronic fuel injection system, they help increase fuel economy up to 10-15 percent depending on the application.  They offer increased packaging flexibility and significant improvement in engine air control compared to conventional carbureted systems.

The Delphi Advantage

Delphi has a long history of manufacturing throttle bodies for the automotive industry with many millions on the road today.  Delphi manufactures throttle bodies at facilities in the United States, Brazil, China, Korea, Poland, India and Mexico, with additional developmental research and support facilities worldwide.  Delphi offers proven experience for a wide range of non-automotive engine products including motorcycles, marine engines and power equipment.

As a global leader in engine management systems technology, Delphi can help manufacturers around the world meet emissions requirements, improve fuel economy and enhance performance.  Delphi is a source for high value solutions and our expertise is built into every product.  Delphi's flexible engineering approach encourages collaboration.  And, Delphi has a thorough understanding of markets around the world and a global network of resources.