Internal-combustion engines – Engine speed regulator – Specific throttle valve structure
Patent
1997-01-10
1999-03-16
Solis, Erick R.
Internal-combustion engines
Engine speed regulator
Specific throttle valve structure
123399, F02D 910
Patent
active
058816950
DESCRIPTION:
BRIEF SUMMARY
BACKGROUND OF THE INVENTION
The present invention concerns a throttle valve system. It comprises a throttle valve housing, a valve stem, a valve disk, a disk adjustment mechanism, a gas mixture chamber, an angle detector, electronic controls, a temperature sensor, and a valve unit. The valve disk is mounted on the stem, which can be adjusted (rotated) within the gas mixture chamber inside the valve housing. The disk adjustment mechanism and the angle detector are at least partly attached to the stem. The controls are accommodated in the valve housing.
A throttle valve system of this type is known from the published international Application No. PCT/EP94/03825. It comprises a valve housing, a stem, a disk, a disk adjustment mechanism, motor controls, and an angle detector. The disk is mounted on the stem inside the valve housing. The disk adjustment mechanism and the rotating component of the angle detector are attached to the stem. The stationary component of the angle detector is accommodated in the valve housing.
A disk adjusting mechanism is known from the published German Patent Application 4,403,604 A1. An uncoupled throttle valve adjustment mechanism as mounted on a stem. The position of the stem is varied by controls in accordance with specific curves.
A throttle valve system may also include a temperature sensor mounted on the outside of the valve housing.
Although these systems are in themselves successful, they entail the drawback that all the electrical connections have to be separate. The systems are more expensive to install, likelier to fail, and more difficult to maintain.
The throttle valve system also includes a valve that forwards vapors from the fuel tank to a gas mixture chamber. This valve is of course remote from the valve housing and must communicate through a hose. The valve must be separately mounted and, like the outside temperature sensor, is separately connected to the controls.
SUMMARY OF THE INVENTION
The object of the present invention is to improve a throttle valve system to the extent that it will be easy to install and maintain as well as be more reliable.
This object is achieved, in accordance with the present invention, by a throttle valve system wherein the valve, the disk adjustment mechanism, the angle detector and the controls are all accommodated in the valve housing; wherein the valve communicates with the gas mixture chamber through a vapor outlet extending through the valve housing; wherein a plug is accommodated concentrically on the valve housing, and wherein the temperature sensor is accommodated in the plug.
The valve housing can accommodate a cable accommodation channel extending to the plug, the angle detector, the controls, and/or the disk adjustment mechanism. The cross-section of the channel can be round, square, or otherwise. It can extend through the valve housing such that it, at least to some extent, includes the valve housing's circumference. The channel can accordingly extend along a circle or part thereof.
The plug can have a housing that accommodates the temperature sensor in a practical way. The temperature sensor can be a negative temperature coefficient thermistor (NTC pill).
It is of advantage for the valve to be an electromagnetically controlled AKF component comprising an annular coil and armature. The metal armature travels back and forth inside the coil. The end of the armature facing the disk seat is sealed with elastomer. The armature and the seal interpenetrate.
The controls incorporated in the valve housing can comprise throttle mechanism controls and/or motor controls.
The throttle mechanism controls are accommodated to advantage in the valve housing and communicate with the disk adjustment mechanism and the angle detector through cables that extend into the disk housing through the cable accommodation channel.
The motor controls are preferably accommodated in the passenger compartment. It is of course also possible to install some or all of them in the accelerator pedal housing. Where best to install them depends on the particul
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patent: 5297521 (1994-03-01), Sasaki et al.
patent: 5513611 (1996-05-01), Ricouard
patent: 5718202 (1998-02-01), Bentz et al.
patent: 5738072 (1998-04-01), Bolte et al.
AB Elektronik GmbH
Solis Erick R.
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