BRIEF DESCRIPTION OF THE SEVERAL VIEWS OF THE DRAWINGS
FIG. 1 is a vertical and sectional right side view of a device driving a fuel-injection pump used for an engine in accordance with a first embodiment of the present invention;
FIG. 2 shows a timer used for the engine shown in FIG. 1. FIG. 2(A) is a vertical and sectional right side view, FIG. 2(B) is a sectional view taken along a line B-B in FIG. 2(A) and FIG. 2(C) is a sectional view taken along a line C-C in FIG. 2(A);
FIG. 3 is an explanatory view of the timer shown in FIG. 2. FIG. 3(A) is a vertical sectional view taken along a line A-A in FIG. 3(B). FIG. 3(B) is a top plan view. FIG. 3(C) is a partly cut side view. FIG. 3(D) is a sectional view taken along a line D-D of FIG. 3(A). FIG. 3(E) is a view when seen in a direction indicated by an arrow (E) in FIG. 3(B). And FIG. 3(F) is a sectional view taken along a line F-F in FIG. 3(E);
FIG. 4 shows a state of a temperature-sensing operation means of the timer shown in FIG. 2 in which the temperature-sensing operation means senses a temperature to operate. FIG. 4(A) shows an operation state when starting the engine during the cold term. FIG. 4(B) shows another operation state while the engine is warm;
FIG. 5 shows an advancement limiting state of the timer shown in FIG. 2. FIG. 5(A) shows a state when starting the engine during the cold term. FIG. 5(B) shows another state while the engine is warm.
FIG. 6 is a graph which shows a characteristic of the advancement limiting state of the timer shown in FIG. 2. FIG. 6(A) shows a state when starting the engine during the cold term. FIG. 6(B) shows another state while the engine is warm.
FIG. 7 is a schematic view showing a top plan view of the engine shown in FIG. 1 as a whole;
FIG. 8 is a view explaining essential portions of an engine in accordance with a second embodiment of the present invention;
FIG. 9(A) is a view when seen in a direction indicated by an arrow IX in FIG. 8(A), FIG. 9(B) is a sectional view taken along a line B-B in FIG. 9(A) and FIG. 9(C) is a sectional view taken along a line C-C in FIG. 9(A);
FIG. 10 is a sectional view taken along a line X-X in FIG. 8(A) and explains how an eccentric cam mechanism operates; and
FIG. 11 is a view explaining how the timer used for the engine shown in FIG. 8 operates. FIG. 11(A) explains an advancing operation of the timer and FIG. 11(B) explains an advancement-cancellation operation.
Patent Application
20070227502
