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An apparatus for use in a system having a gas fuel supply and a combustor includes a fuel actuator, a controller; and a premixer. The controller generates a command signal indicative of actuation sought from the fuel actuator. The actuator receives gas fuel from the liquid fuel supply and provides l

An apparatus for use in a system having a gas fuel supply and a combustor includes a fuel actuator, a controller; and a premixer. The controller generates a command signal indicative of actuation sought from the fuel actuator. The actuator receives gas fuel from the liquid fuel supply and provides liquid fuel at a modulated rate of flow in response to the command signal. The premixer receives the fuel from the actuator, mixes the fuel with air, and provides the mixture to the combustor.

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An apparatus for use in a system having a gas fuel supply and a combustor includes a fuel actuator, a controller; and a premixer. The controller generates a command signal indicative of actuation sought from the fuel actuator. The actuator receives gas fuel from the liquid fuel supply and provides l

An apparatus for use in a system having a gas fuel supply and a combustor includes a fuel actuator, a controller; and a premixer. The controller generates a command signal indicative of actuation sought from the fuel actuator. The actuator receives gas fuel from the liquid fuel supply and provides liquid fuel at a modulated rate of flow in response to the command signal. The premixer receives the fuel from the actuator, mixes the fuel with air, and provides the mixture to the combustor. emaining, working cylinders being used so that high-temperature gas exhausted from said remaining cylinders is merged and mixed with unburned air exhausted from said at least one, halted-injection cylinder at a merge portion in an exhaust manifold of the cylinders to enable after-burning of a burnable component of the exhaust gas in the path upstream of said catalyst. 3. An exhaust gas purification apparatus for an internal combustion engine comprising: an HG absorbent for absorbing HG from exhaust gas generated by said internal combustion engine; a catalyst for removing HC released from said HG absorbent; and a catalyst-early-warming means for increasing the temperature of the catalyst early, right after a start of said internal combustion engine in order to activate the catalyst at an early time; said catalyst-early-warming means including: an exhaust-gas-heating control means for executing ignition retard control to raise the exhaust gas temperature making a rich component of the exhaust gas burnable inside a path on an upstream side of the catalyst through which the exhaust gas flows during execution of control to heat the catalyst at an early time; and a cylinder deactivation operation control means for halting injection of fuel into at least one cylinder of said internal combustion engine and operating the internal combustion engine by using remaining cylinders during execution of the control to heat the catalyst at an early time, whereby high-temperature gas exhausted from said remaining cylinders is mixed with oxygen of unburned air exhausted from said at least one, halted-injection cylinder to enable after-burning of a burnable component of the exhaust gas in the path, wherein the cylinder deactivation operation control means controls an air-fuel ratio of air-fuel mixture supplied to the remaining cylinders to a value close to a theoretical air-fuel ratio or a value slightly shifted to a lean side. 4. An exhaust gas purification apparatus for an internal combustion engine according to claim 3, wherein the cylinder deactivation operation control means carries out ignition a plurality of times in one combustion cycle of each of the remaining cylinders during a cylinder deactivation operation. 5. An exhaust gas purification apparatus for an internal combustion engine according to claim 3, wherein said exhaust-gas-heating control means commences ignition retard control after said cylinder deactivation operation control means has started a cylinder deactivation operation. 6. An exhaust gas purification apparatus for an internal combustion engine according to claim 3, wherein a cylinder deactivation operation is started at the same time or after said exhaust-gas-heating control means commences ignition retard control. 7. An exhaust gas purification apparatus for an internal combustion engine according to claim 3, wherein said cylinder deactivation operation control means changes a timing to start a cylinder deactivation operation in accordance with a driving state after a start of said internal combustion engine. 8. An exhaust gas purification apparatus for an internal combustion engine according to claim 3, wherein said cylinder deactivation operation control means sequentially changes one of the cylinders to serve as one of the halted-injection cylinders during a cylinder deactivation operation. 9. An exhaust gas purification apparatus as in claim 3, wherein an exhaust valve is provided for the halted-injection cylinder and a valve timing adjusting means adjusts the valve timing of the exhaust valve so that unburned air exhausted from the halted-injection cylinder is merged with high-temperature gas exhausted from at least one of the working cylinders at a merge portion upstream of the catalyst. stream of the fluid pump (11) is a load sensing priority flow control valve (15) having both a controlled flow outlet port (CF) and an excess flow outlet port (EF). The excess flow outlet port (EF) communicates with an inlet port (35) of the fluid controller (19), while the controlled flow outlet port (CF) communicates with a fluid inlet (63) of the compensation valve (21). As a result, when the steering actuator (17) is at the end of its travel, pressure will be communicated only through the compensation valve (21), and the operator will be unable to turn the steering wheel further in the same direction.