Abstract:
A method and apparatus pump fuel to a fuel injection system in an internal combustion engine. The method comprises steps of pumping a liquid fuel to a first pressure, using the liquid fuel at the first pressure as a hydraulic fluid for driving a gaseous fuel pump, and pumping a gaseous fuel to a second pressure with the gaseous fuel pump.
Abstract:
A method and apparatus pump fuel to a fuel injection system in an internal combustion engine. The method comprises steps of pumping a liquid fuel to a first pressure, using the liquid fuel at the first pressure as a hydraulic fluid for driving a gaseous fuel pump, and pumping a gaseous fuel to a second pressure with the gaseous fuel pump.
Abstract:
A fuel injection device, wherein a plurality of high-pressure fuel feed parts each comprising a supply pump part and fuel metering part are disposed, in parallel with each other, between a feed pump part sucking fuel from a fuel tank and a common rail so that the injection of a specified amount of fuel can be maintained even if one high-pressure pump fails, whereby, even if one high-pressure fuel feed parts stops, a common rail pressure can be maintained by the other high-pressure fuel feed part.
Abstract:
A fuel system for a diesel engine having a plurality of combustion chambers, the engine having ignition cackle occurring in at least one combustion chamber includes a standard fuel injector being associated with each of the non-cackling combustion chambers, and a non-standard fuel injector being associated with each of the cackling combustion chambers, each of the non-standard fuel injectors having an increased pilot volume of fuel, the increased pilot volume of fuel having a quantity of fuel therein for injection into the associated combustion chamber. A non-standard fuel injector and a method for affecting cackle are also included.
Abstract:
A fuel system for a diesel engine having a plurality of combustion chambers, the engine having ignition cackle occurring in at least one combustion chamber includes a standard fuel injector being associated with each of the non-cackling combustion chambers, and a non-standard fuel injector being associated with each of the cackling combustion chambers, each of the non-standard fuel injectors having an increased pilot volume of fuel, the increased pilot volume of fuel having a quantity of fuel therein for injection into the associated combustion chamber. A non-standard fuel injector and a method for affecting cackle are also included.
Abstract:
A fuel system is described which comprises a high pressure fuel pump arranged to supply fuel under pressure to a plurality of injectors. A backleak connection line is arranged to return fuel from the injectors to a fuel reservoir. A venturi pump is connected to the backleak connection line and is arranged to draw fuel from the line to reduce the fuel pressure therein.
Abstract:
An objective of the present invention is to provide a fuel injection pump wherewith, in addition to main injection, pre-injection is made possible in the vicinity of top dead center in the exhaust stroke, and wherewith, by regulating the pre-stroke, defined as the stroke from bottom dead center of a plunger 2 to the commencement of fuel line pressurization, it is possible to freely control both the pre-injection volume and the pre-injection timing relative to the main injection. Attention having been given to the combining of a pre-stroke varying mechanism together with a two-stage injection mechanism, the present invention is a fuel injection pump that is made so that a pre-stroke is regulated by changing the relative positions, in the axial direction, of a plunger 2 that sends fuel under pressure and a control sleeve 3 that fits around the outside of the plunger 2 so as to slide freely thereon. The cam 4 that drives the plunger 2 comprises a main cam nose 20 for main injection use and a pre cam nose 21 for pre-injection use.
Abstract:
A vehicle speed limiting system for a vehicle having an engine which includes a plurality of fuel injectors coupled to a low volume fuel injection pump operative to successively trigger a flow of fuel directly to the individual fuel injectors. The vehicle speed is converted to a speed signal which, when it reaches a preset limit, is utilized by the system control to close a fuel control valve through which fuel normally passes to the injection pump. The system is characterized by a low fuel residual upon cutoff by the fuel control so that the engine speed is quickly slowed for lack of fuel.
Abstract:
In one aspect of the present invention, a method for detecting an electrical fault condition of a driver circuit is disclosed. The driver circuit is used to energize an electrohydraulic device that regulates fluid pressure. The method detects the fault condition, and responsively switches from a normal fluid pressure control strategy to a fault mode fluid pressure control strategy in order to continue to control the fluid pressure during the fault condition.
Abstract:
A fuel pumping apparatus for supplying fuel to an engine incudes an angularly adjustable throttle for determining the amount of fuel supplied to the engine. The setting of the throttle in normal operation is determined by an actuator which is controlled by an electronic control system. A mechanical governor is provided which is coupled to the throttle member by a sliding link and this acts to prevent the speed of the engine exceeding a predetermined value. In the event of failure of the actuator or control system a pivotal arm is moved to an emergency run position in which the actuator is decoupled from the throttle member and the force exerted by the governor spring of the mechanical governor is reduced to allow the engine to operate at a reduced speed.