摘要:
In an intake air heater of an engine, in which a fuel containing alcohol is employed, the amount of hot air increases, as the concentration of alcohol in the fuel increases. Although the latent heat of alcohol is about seven times as large as that of gasoline, the amount of intake air is controlled in relation to the concentration of alcohol in the fuel, so that the intake air is heated, as a function of a concentration of alcohol, using an alcohol sensor.
摘要:
A heated fuel intake system for an internal combustion engine for introducing warmed air to the engine and air to a fuel supply circuit in a carburetor comprises a heat stove from which the warmed air is introduced into an air cleaner to heat the air to a temperature equal to or higher than a first predetermined temperature. The introduction of the warmed air from the heat stove is interrupted by a first valve unit when the temperature of the air to be fed to the engine has exceeded the temperature equal to or higher than the first predetermined temperature. The introduction of the warmed air into the air cleaner is again initiated when the temperature of the air inside the air cleaner becomes a value equal to a second predetermined temperature higher than the first predetermined temperature and, simultaneously therewith, an air-fuel ratio leaner is operated to introduce an additional air to compensate for the increased richness of the combustible mixture.
摘要:
A one-way throttling valve for use in the vacuum line of a pneumatic membrane actuator which controls the combustion air temperature of a carburetor-euipped internal combustion engine by means of an air flow proportioning flapper admitting cold raw air and/or preheated raw air into a duct junction upstream of the intake filter, the throttling valve having a tiny throttling orifice which remains open, while the throttling valve itself is closed, thereby delaying the removal of negative pressure from the pneumatic actuator. The one-way throttling valve may be arranged in one of the two vacuum line connectors of the valve housing of a thermostat relief valve.
摘要:
A device for automatically regulating the intake air temperature of a carburetor-equipped internal combustion engine whose air intake system includes a flow proportioning pivotable flapper in a duct junction admitting cold raw air and/or preheated raw air to the air intake filter, depending on the ambient temperature, the flapper position being controlled by a pneumatic membrane actuator receiving negative pressure from the engine intake manifold, via a vacuum line with a thermostat-controlled pressure relief valve which reads the temperature of the raw air mixture. In the cold air intake duct is arranged a temperature-responsive unit, in the form of either a wax thermostat or a bimetallic spiral and disc cam, which serves as a position-adjustable stop thereby preventing the flapper from completely closing the warm air intake duct, when the engine takes in cold air, operating at full load.
摘要:
The ratio of preheated inlet air to ambient inlet air supplied to an internal combustion engine is controlled by a proportioning valve operated by a vacuum motor. Operating pressure for the motor is controlled by valve means responsive to the inlet air temperature for normally preventing changes in the motor operating pressure, but which selectively connects the motor via a predetermined restriction with essentially atmospheric pressure, or with sub-atmospheric pressure in the engine inlet air induction passage downstream of the throttle valve, when said inlet temperature is correspondingly above or below a predetermined operating range, whereby the operating pressure for the vacuum motor and actuation of the proportioning valve are functions of an algebraic integration of the time intervals that the inlet air temperature varies from the predetermined operating range.
摘要:
A rotary piston engine incorporating a regenerator and valve system for heating input air at constant volume after compression to increase engine efficiency. A catalyst may be added to the regenerator and supplementary air may be injected into the system to reduce the emission of pollutants.
摘要:
In an internal combustion engine air intake control system in which a valve is actuated by a vacuum motor in response to engine intake vacuum so as to control an admixture of heated air with ambient air in an engine air intake passage, and in which the action of said intake vacuum on said motor is modified by a thermo-responsive air bleed valve which bleeds air into said motor at a rate which increases with intake air temperature, a thermo-responsive non-return valve is disposed in the bleed valve housing and is constructed and arranged so that, when the engine is cold the non-return valve is closed but permits fluid flow from said vacuum motor to said vacuum source but not in the opposite direction, but, when the engine has warmed up, opens and permits free communication in either direction between said vacuum motor and said vacuum source, this arrangement ensuring that sudden acceleration of the engine before it has warmed up will not result in a sudden surge of cold air being delivered to the engine.
摘要:
A method and apparatus for the mixture preparation of internal combustion engines in which an adaptation of the suction air temperature to the varying operating and load conditions of internal combustion engines for motor vehicles is achieved; possibly exclusively preheated air is thereby supplied to the internal combustion engine by way of the suction system in the partial load range while exclusively fresh air flows into the combustion engine in the full load range whereby the warm air serving for the mixture formation has a substantially constant temperature over the entire range of its admixture.
摘要:
Improvement in a system for controlling fluid temperature comprising a member movable between positions in which the temperature is respectively increased and decreased, and an actuator linked to the member and mounted to communicate with the fluid to adjust the position of the member in accordance with temperature changes in the fluid, the improvement being in the actuator, which comprises a housing; a diaphragm mounted in the housing to define a control chamber therein, the diaphragm having a valving portion and having a piston portion linked to the member and mounted to reciprocate in the housing, to move the member between its positions, the housing having an opening on one side of the diaphragm for connection to a source of regulating pressure, the valving portion being adjacent the opening and movable between sealed and unsealed positions with respect thereto; and a temperature sensitive element mounted to apply force to the valving portion dependent upon the fluid temperature, so that the balance of forces on the valving portion, including force attributable to the regulating pressure, will determine the position of the valving portion, and, in turn, the pressure in the chamber and the positions of the piston portion and the member.
摘要:
An apparatus automatically sensing and regulating intake air temperatures for combustion engines equipped with a carburetor or with a propane gas fuel operated fuel injector. The temperature of the intake air entering the engine is sensed by a bimetallic valve element, which simultaneously operates a flapper valve by means of the engine intake vacuum. The flapper valve automatically proportions the amount of raw cold intake air and preheated intake air for optimum engine operation.