Caterpillar Inc.

Westport Power Inc.

Seahawk Robotics Inc.

Westport Fuel Systems Canada Inc.

Derek Puzzuoli

David Kalu Mumford

Joshua W Steffen

Victor Woo

Jordan C Haas

Steven Peddlesden

Josh Steffen

Wesley A Brown

Jason Clark

David K Mumford

The present invention discloses a wirelessly controlled vehicle that is configured to travel in air, on liquid and under liquid with an ability to communicate with a remote operator through wireless communication.

Wirelessly controlled flying and submerging vehicle

Disclosed are a fluid control system and method for controlling delivery of two variable pressure fluids to maintain a pressure bias between the two fluids within an end use device. The system employs an actively controlled vent valve which can be integrated into a fluid control module in preferred embodiments and is actuated to an open position to decrease fluid pressure in a first fluid supply line when a determined pressure differential reversal exceeds a predetermined threshold pressure differential reversal. The disclosed system is particularly useful in a high pressure direct injection (HPDI) multi-fueled engine system where the first fluid is a gaseous fuel and the second fluid is a liquid fuel. The fluid control system and method of controlling it provide for improved control of venting along with protecting system components from high back pressure and cross contamination of fluids.

High pressure fluid control system and method of controlling pressure bias in an end use device

An improved fuel system for a dual-fuel internal combustion engine. During normal operation, the primary fuel passes through a pressure regulator before arriving at a primary fuel rail. Further, pressurized secondary fuel is delivered to both a secondary fuel rail and to the pressure regulator for purposes of regulating the output pressure of the primary fuel that is delivered to the primary fuel rail. When the pressure at the primary fuel supply or between the primary fuel supply and the pressure regulator drops below a minimum operating pressure, the pressure regulator is isolated from the secondary fuel and the secondary fuel continues to be pressurized until it reaches a suitable pressure for operating in a limp mode. Then, the secondary fuel, which is pressurized to greater than a normal operating pressure, may be injected at the higher pressure for improved performance of the engine in the limp mode.

Control system and method for isolating high pressure pilot fuel in dual-fuel HPDI system

Growing community of inventors

Vancouver, Canada

Derek Puzzuoli