Hpdi Technology LP

Hpdi Technology Limited Partnership

Westport Power Inc.

Westport Fuel Systems Canada Inc.

Jian Huang

Sandeep Munshi

Philip G Hill

Gordon P McTaggart-Cowan

Duran Cheung

Ashish Singh

Richard J Ancimer

Kenneth R Mann

Dale W Goudie

David R Wager

David Mumford

Michael C Wickstone

Gordon Mctaggart-Cowan

Kevin D Lee

Kevin Derek Lee

An apparatus includes a pressure regulator, an in-cylinder fuel injector and a controller programmed to, when fueling with a first gaseous fuel, command the regulator to regulate the pressure of the first gaseous fuel to a first injection pressure; and command the injector to inject within 90 CA° of TDC during a compression stroke an injected quantity of a first gaseous fuel into the combustion chamber at the first injection pressure, and when fueling with a second gaseous fuel, to command the regulator to regulate the pressure of the second gaseous fuel to a second injection pressure; and command the injector to inject within 90 CA° of TDC during the compression stroke an injected quantity of a second injected gaseous fuel.

Apparatus and method for regulating and injecting gaseous fuel into an internal combustion engine

An apparatus and method for injection of a pilot fuel into an internal combustion engine includes a variety of steady state, transient and other techniques to reduce an injection quantity of the pilot fuel and/or a carbon content of the pilot fuel.

Apparatus and method for injecting a pilot fuel into an internal combustion engine

An improved apparatus for injecting and igniting fuel in an internal combustion engine includes a nozzle with a bore and a tip at a distal end. The bore includes a longitudinal axis and an annular valve seat. A needle reciprocates within the bore and in combination with the annular valve seat forms an injection valve where in a closed position the needle abuts the annular valve seat and in an open position the needle is spaced apart from the annular valve seat. A retainer axially protrudes from the tip of the nozzle along the longitudinal axis thereof whereby an annular mixing space extends between the retainer and the tip of the nozzle. There is an igniter secured to the nozzle that includes a positive-ignition source forming an ignition zone within a portion of the annular mixing space. Nozzle arrangements include those with both pilot hole and main holes in the nozzle extending between the plenum and outside the nozzle where the main hole longitudinal axis bypasses the retainer and a pilot fuel jet from the pilot hole(s) is retained and redirected such that an ignitable fuel-air mixture is formed within the annular mixing space. Nozzle arrangements also include nozzles with a plurality of main holes and no separate pilot holes in which the main longitudinal axis bypasses the retainer such that a main fuel jet is scraped by the retainer and scraped fuel is retained and redirected such that an ignitable fuel-air mixture is formed within the annular mixing space. The igniter is actuated to ignite the ignitable fuel-air mixtures.

Apparatuses and methods for fuel injection and ignition in an internal combustion engine

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Surrey, Canada

Jian Huang