DEARBORN, Mich. — Ford Motor Company and Toyota Motor said on Monday that they would jointly develop a gas-electric hybrid fuel system for pickup trucks and sport utility vehicles aimed at keeping larger models affordable as the automakers work to meet stricter fuel-economy standards.

The companies said they did not plan to collaborate on developing the vehicles themselves, instead using the hybrid system they develop to power separate models under the Ford and Toyota brands. The resulting hybrid trucks would go on sale later this decade, they said, without providing a more specific timeframe.

“Clearly Ford and Toyota will remain competitors,” said Derrick Kuzak, Ford’s group vice president for research and development. “By working together, we will be able to offer our customers more affordable technology sooner.”

In addition, Ford and Toyota said they intended to collaboratively develop new technology for information and entertainment systems in vehicles, with the goal of offering more Internet-based services and useful data to drivers. The companies already are among the industry’s leaders in this area, known as telematics, and their partnership could give them enough leverage to essentially dictate the standards that other automakers use to wirelessly connect mobile phones and other devices to vehicles.