Gasoline Engine with Glow Plug Heater for a Model Car

Abstract

A gasoline engine for a model car comprises a cylinder having a combustion chamber formed therein, a connecting seat positioned on the cylinder having a threaded bore in communication with the combustion chamber, a glow plug having a heater equipped therein and installed in the threaded bore of the connecting seat and a preheating net having a circular frame adapted to form in the connecting seat. The preheating net will maintain its temperature to preheat the injected mixture of gasoline and air which will be combusted completely to increase the efficiency of the gasoline engine.

Claims

1. A gasoline engine for a model car comprising: a cylinder having a combustion chamber formed therein; a connecting seat positioned on said cylinder having a threaded bore in communication with said combustion chamber; a glow plug having a heater equipped therein and installed in said threaded bore of said connecting seat; and a preheating net having a circular frame adapted to form in said connecting seat.

2. A gasoline engine for a model car as claimed in claim 1 wherein said preheating net further comprising a plurality of ribs extending from said circular frame.

3. A gasoline engine for a model car as claimed in claim 2 wherein said plurality of ribs extending toward the center of said preheating net to form a central plate right beneath said heater of said glow plug.

4. A gasoline engine for a model car as claimed in claim 1 wherein said glow plug further comprising a conical portion formed at one end thereof, and said connecting seat further comprising a conical bore to closely embrace said conical portion of said glow plug.

5. A gasoline engine for a model car as claimed in claim 1 said connecting seat further comprising a circular recess for the installation of said preheating net.

6. A gasoline engine for a model car as claimed in claim 1 wherein said preheating net is made of Nickel alloy.

7. A gasoline engine for a mold car as claimed in claim 1 wherein said preheating net can be integrally molded with the connecting seat.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Those and other advantage, object and features of the gasoline engine for a model car in accordance with the present invention will become more apparent from the below detailed description of the preferred embodiment with reference to the accompanying drawings, wherein:

[0012] FIG. 1 is a perspective exploded view of a conventional model car gasoline engine with a glow plug;

[0013] FIG. 2 is a perspective exploded view of a model car gasoline engine having a glow plug in accordance with an embodiment of the present invention;

[0014] FIG. 3 is a perspective exploded view of a connecting seat having a preheating net equipped thereon of a model car gasoline engine with a glow plug in accordance with an embodiment of the present invention;

[0015] FIG. 4 is a sectional view of a preheating net used in a gasoline engine of a model car in accordance with the embodiment of the present invention; and

[0016] FIG. 5 is a partial sectional view of a gasoline engine of a model car in accordance with the embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

[0017] Referring to FIG. 2 which shows a perspective exploded view of a model car gasoline engine with a glow plug in accordance with an embodiment of the present invention, the gasoline engine 10 has a cylinder 10 with a combustion chamber 12 formed therein and an opening 101. A plurality of screw holes 102 are formed at the peripheral upper surface of the cylinder 10. A connecting seat 13 is generally in the shape of a circular plate which will be fastened to the cylinder 10 with a plurality of screws 131. There is a washer 15 installed between the connecting seat 13 and the cylinder 10. The connecting seat 13 has a threaded bore 133 for a glow plug 14 to be fitted therein. The glow plug 14 is generally in a cylinder shape with its lower portion formed into a conical portion 142. At one end of the glow plug 14, there is equipped with an electrode 145 for heating a preheating net and a heater installed in the glow plug 14 to be more clearly described herein below. A heat sink 11 substantially in the shape of a sleeve is covered onto the gasoline engine 10.

[0018] In the connecting seat 13, there is installed a prehearing net 20. The construction and function of the preheating net can be seen and described as the same shown in FIG. 3 and FIG. 4 which are perspective exploded view and sectional view of a model car gasoline engine with a glow plug in accordance with an embodiment of the present invention. The preheating net 20 is made of a metal material which is preferably a nickel alloy in the present embodiment. The preheating net 20 is substantially in a circular shape to be fitted in a circular recess 132 of the connecting seat 13. The preheating net 20 comprises a circular frame 21 which comprises a plurality of ribs 22 extending therefrom and toward the center of the preheating net 20 to form a central plate 23. The central plate 23 is in a dimension suitably to shield the heater 141 of the glow plug 14. It is readily understood that the preheating net 20 can be integrally molded with the connecting seat 13.

[0019] The structure of the preheating net 20 and the glow plug 14 can be better understood in view of FIG. 5 which is a partial sectional view of a gasoline engine of a model car in accordance with the embodiment of the present invention. In FIG. 5, the glow plug 14 has a heater 141 equipped therein to be preheated by the electricity energy from the electrode 145. The glow plug 14 is substantially in the shape of a cylinder with its lower end formed into a conical portion 142 to communicate with the combustion chamber 12 of the cylinder 10 with a shrinkage cavity 143. The connecting seat 13 is formed with a conical bore 134 which is inserted by the glow plug 14. The conical portion 142 of the glow plug 14 is fitted tightly with the conical bore 134 of the connecting seat 13. The preheating net 20 is mounted on the peripheral surface of the cylinder 10 with a washer 15 and communicating with the combustion chamber 12. The central plate 23 of the preheating net 20 is positioned right under the heater 141 of the glow plug 14.

[0020] It is noted that the conical portion 142 is tightly in touch with the conical bore 134 of the connecting seat 13. The pressure in the combustion chamber 20 of the cylinder 10 will be sustained during the combustion of the mixture of gasoline and air. It is also noted that the central plate 23 of the preheating net 20 is positioned beneath the heater 141 of the glow plug 14. The mixture of gasoline and air in the combustion chamber 12 in a relatively low temperature will not directly spray on the heater 141. The preheating net 20 will maintain its temperature to preheat the injected mixture. Therefore, the mixture can be combusted completely thus increase the efficiency of the gasoline engine of the model car.

[0021] Although the gasoline engine, having a glow plug heater for a model car in accordance with the present invention, has been described by way of an embodiment, it is noted other changes, improvements and modifications can still be made without departing from the spirit and scope of the present invention.