Transmission controlled power enrichment override apparatus

Claim 2

In combination with an internal combustion engine and a carburetor providing an air fuel mixture thereto: a. fuel metering valve means having a member movable in response to engine vacuum to normally provide a variable metered fuel rate to said engine in response to varying fuel enrichment demands, b. fuel metering valve stop means having a first position out of the path of travel of said member permitting unrestrained movement of the same and a second position in the path of travel of said member so as to limit the fuel enrichment of said first means irrespective of the vacuum signal; and c. means responsive to vehicle speed operative to position said stop means in said first position under low speed conditions and in said second position under higher speed conditions.

Claim 3

In combination with an internal combustion engine and a carburetor for providing an air fuel mixture thereto: a. fuel metering valve means operable to normally provide a variable metered fuel rate to said engine in response to varying fuel enrichment demands, said fuel metering valve means being positionable to provide a flow area condition intermediate a minimum flow area condition and a maximum flow area condition; and b. fuel metering valve override means responsive to a signal indicating vehicle speed and including energizable solenoid means and transmission controlled switch means for energizing said solenoid, said transmission controlled switch means having a first condition to cause said solenoid to normally allow said metering valve means to be positioned in said intermediate flow area condition and a second condition to cause said solenoid means to position said metering valve means in said minimum flow area condition.

Claim 4

In combination with an internal combustion engine and a carburetor for providing an air fuel mixture thereto: a. fuel metering valve means operable to normally provide a variable metered fuel rate to said engine in response to varying fuel enrichment demands, said fuel metering valve means being positionable to provide a flow area condition intermediate a minimum flow area condition and a maximum flow area condition; and b. fuel metering valve override means responsive to a signal indicating vehicle speed and including energizable solenoid means and transmission controlled switch means for energizing said solenoid, said transmission controlled switch means having a first condition to cause said solenoid to normally allow said metering valve means to be positioned in said intermediate flow area condition and a second condition to cause said solenoid means to position said metering valve means in said minimum flow area condition.

Claim 5

In combination with an internal combustion engine for providing a source of vacuum and a carburetor for providing an air fuel mixture to said engine: a. a vacuum unit for advancing the timing of ignition in said engine when said vacuum is communicated to said vacuum unit; b. fuel metering valve means operable to normally provide a variable metered fuel rate to said engine in accordance with varying fuel enrichment demands, said fuel metering valve means being positionable to provide a flow area condition intermediate a minimum flow area condition and a maximum flow area condition; c. solenoid means operable to normally allow said metering valve means to be positioned in said intermediate flow area condition and to otherwise override said fuel metering valve means by positioning said fuel metering valve means in said minimum flow area condition; and d. control means responsive to a signal indicating vehicle speed for controlling said solenoid and said vacuum advance unit and having a first condition operable to normally prevent said vacuum from being communicated to said vacuum unit while also causing said solenoid means to normally allow said metering valve means to be positioned in said intermediate flow area condition and a second condition for permitting said vacuum to be communicated to said vacuum unit while also causing said solenoid to position said metering valve means in said minimum flow area condition.

Claim 6

In combination with an internal combustion engine for providing a source of vacuum and a carburetor for providing an air fuel mixture to said engine: a. a vacuum unit for advancing the timing of ignition in said engine when said vacuum is communicated to said vacuum unit; b. fuel metering valve means operable to normally provide a variable metered fuel rate to said engine in accordance with varying fuel enrichment demands, said fuel metering valve means being positionable to provide a flow area condition intermediate a minimum flow area condition and a maximum flow area condition; c. solenoid means operable to normally allow said metering valve means to be positioned in said intermediate flow area condition and to otherwise override said fuel metering valve means by positioning said fuel metering valve means in said minimum flow area condition; and d. control means responsive to a signal indicating vehicle speed for controlling said solenoid and said vacuum advance unit and having a first condition operable to normally prevent said vacuum from being communicated to said vacuum unit while also causing said solenoid means to normally allow said metering valve means to be positioned in said intermediate flow area condition and a second condition for permitting said vacuum to be communicated to said vacuum unit while also causing said solenoid to position said metering valve means in said minimum flow area condition.

Claim 7

In combination with an internal combustion engine for providing a source of vacuum signals and a carburetor for providing an air fuel mixture to said engine: a. a transmission with an input connected to said engine and an output connected to a load, said transmission having variable drive ratio means for varying the ratio of the speed of the output to the speed of the input from a high drive ratio to lower drive ratios; b. fuel metering valve means operable to normally provide a variable metered fuel rate of said engine in accordance with varying fuel enrichment demands, said fuel metering valve means being positionable to provide a flow area condition intermediate a minimum flow area condition and a maximum flow area condition; c. solenoid means operable to normally allow said fuel metering valve means to be positioned in said intermediate flow area condition and to otherwise override said fuel metering valve means by positioning said metering valve means in said minimum flow area condition; and d. transmission controlled switch means having a first condition for causing said solenoid means to normally allow said fuel metering valve means to be positioned in said intermediate flow area condition and a second condition when said transmission is in said high drive ratio to cause said solenoid means to position said fuel metering valve means in said minimum flow area condition.

Claim 8

In combination with an internal combustion engine for providing a source of vacuum signals and a carburetor for providing an air fuel mixture to said engine: a. a transmission with an input connected to said engine and an output connected to a load, said transmission having variable drive ratio means for varying the ratio of the speed of the output to the speed of the input from a high drive ratio to lower drive ratios; b. fuel metering valve means operable to normally provide a variable metered fuel rate of said engine in accordance with varying fuel enrichment demands, said fuel metering valve means being positionable to provide a flow area condition intermediate a minimum flow area condition and a maximum flow area condition; c. solenoid means operable to normally allow said fuel metering valve means to be positioned in said intermediate flow area condition and to otherwise override said fuel metering valve means by positioning said metering valve means in said minimum flow area condition; and d. transmission controlled switch means having a first condition for causing said solenoid means to normally allow said fuel metering valve means to be positioned in said intermediate flow area condition and a second condition when said transmission is in said high drive ratio to cause said solenoid means to position said fuel metering valve means in said minimum flow area condition.

Claim 9

In combination with an internal combustion engine providing a source of vacuum, said engine connected with the input of an associated transmission the output of which is connected to a load, said transmission having a variable ratio drive means for varying the ratio of the speed of the output to the speed of the input from a high drive ratio to lower drive ratios: a. fuel delivery means for providing fuel to said engine and including a fuel delivery passage, a fuel flow orifice in said passage and a fuel metering rod translatable in said orifice to effect a flow area intermediate a minimum flow area and a maximum flow area, said minimum flow area allowing sufficient fuel to be provided to said engine for normally operating said transmission in said high drive ratio; b. fluid motor means connected with said metering rod and communicating with said source of vacuum for positioning said fuel metering rod to effect said minimum flow area when said vacuum is above a predetermined vacuum and for positioning said metering rod to effect said intermediate flow area as said vacuum drops below said predetermined vacuum while said transmission drive ratios are less than said high drive ratio; c. transmission controlled switch means responsive to said variable drive ratio means and having a first condition when said transmission is in said high drive ratio and a second condition when said transmission is in said lower drive ratios; and d. metering rod positioning means responsive to said conditions of said transmission controlled switch and including a solenoid having an armature that when said switch means is in said first condition is translatable between a first position in which said metering rod effects said minimum flow area and a second position in which said fluid motor is allowed to position said metering rod to effect said intermediate flow area in response to said vacuum.

Claim 10

In combination with an internal combustion engine providing a source of vacuum, said engine connected with the input of an associated transmission the output of which is connected to a load, said transmission having a variable ratio drive means for varying the ratio of the speed of the output to the speed of the input from a high drive ratio to lower drive ratios: a. fuel delivery means for providing fuel to said engine and including a fuel delivery passage, a fuel flow orifice in said passage and a fuel metering rod translatable in said orifice to effect a flow area intermediate a minimum flow area and a maximum flow area, said minimum flow area allowing sufficient fuel to be provided to said engine for normally operating said transmission in said high drive ratio; b. fluid motor means connected with said metering rod and communicating with said source of vacuum for positioning said fuel metering rod to effect said minimum flow area when said vacuum is above a predetermined vacuum and for positioning said metering rod to effect said intermediate flow area as said vacuum drops below said predetermined vacuum while said transmission drive ratios are less than said high drive ratio; c. transmission controlled switch means responsive to said variable drive ratio means and having a first condition when said transmission is in said high drive ratio and a second condition when said transmission is in said lower drive ratios; and d. metering rod positioning means responsive to said conditions of said transmission controlled switch and including a solenoid having an armature that when said switch means is in said first condition is translatable between a first position in which said metering rod effects said minimum flow area and a second position in which said fluid motor is allowed to position said metering rod to effect said intermediate flow area in response to said vacuum.

Claim 11

In combination with an internal combustion engine providing a source of vacuum, said engine connected with the input of an associated transmission the output of which is connected to a load, said transmission having a variable ratio drive means for varying the ratio of the speed of the output to the speed of the input from a high drive ratio to lower drive ratios: a. a carburetor for providing said air fuel flow to said engine and having a fuel delivery passage, a fuel flow orifice in said passage and a fuel metering rod translatable in said orifice to effect a flow area intermediate a minimum flow area and a maximum flow area, said minimum flow area allowing sufficient fuel to be provided to said engine for normally operating said transmission in said high drive ratio; b. fluid motor means in said carburetor connected with said metering rod and communicating with said source of vacuum for positioning said fuel metering rod to effect said minimum flow area when said vacuum is above a predetermined vacuum and for positioning said metering rod to effect said intermediate flow area as the vacuum drops below said predetermined vacuum while said transmission drive ratios are said lower drive ratios; c. transmission controlled switch means connected with a source of electrical energy and responsive to said transmission drive ratios, said switch means having a closed condition when said variable drive ratio is said high drive ratio and a normally open condition when said drive ratio is said lower drive ratios; and d. metering rod positioning means mounted on said carburetor and responsive to said conditions of said transmission controlled switch, said metering rod positioning means including a solenoid that is normally de-energized when said transmission controlled switch is in said normally-open condition and that is energized when said switch is in said closed condition, said solenoid having an armature that when said switch is in said first condition is translatable between a first position in which said metering rod effects said minimum flow area and a second position in which said fluid motor is allowed to position said metering rod to effect said intermediate flow area.

Claim 12

In combination with an internal combustion engine providing a source of vacuum, said engine connected with the input of an associated transmission the output of which is connected to a load, said transmission having a variable ratio drive means for varying the ratio of the speed of the output to the speed of the input from a high drive ratio to lower drive ratios: a. a carburetor for providing said air fuel flow to said engine and having a fuel delivery passage, a fuel flow orifice in said passage and a fuel metering rod translatable in said orifice to effect a flow area intermediate a minimum flow area and a maximum flow area, said minimum flow area allowing sufficient fuel to be provided to said engine for normally operating said transmission in said high drive ratio; b. fluid motor means in said carburetor connected with said metering rod and communicating with said source of vacuum for positioning said fuel metering rod to effect said minimum flow area when said vacuum is above a predetermined vacuum and for positioning said metering rod to effect said intermediate flow area as the vacuum drops below said predetermined vacuum while said transmission drive ratios are said lower drive ratios; c. transmission controlled switch means connected with a source of electrical energy and responsive to said transmission drive ratios, said switch means having a closed condition when said variable drive ratio is said high drive ratio and a normally open condition when said drive ratio is said lower drive ratios; and d. metering rod positioning means mounted on said carburetor and responsive to said conditions of said transmission controlled switch, said metering rod positioning means including a solenoid that is normally de-energized when said transmission controlled switch is in said normally-open condition and that is energized when said switch is in said closed condition, said solenoid having an armature that when said switch is in said first condition is translatable between a first position in which said metering rod effects said minimum flow area and a second position in which said fluid motor is allowed to position said metering rod to effect said intermediate flow area.

Claim 13

In combination with an internal combustion engine for providing a source of Vacuum, said engine connected to the input of an associated transmission the output of which is connected to a load, said transmission having a variable ratio drive means for driving said output from said input and for varying the ratio of the speed of said output relative to the speed of said input from a high drive ratio to lower drive ratios; a vacuum unit for advancing the timing of ignition in said engine when vacuum signals are applied thereto, a vacuum conduit connected between said vacuum unit and said engine and valve means in said vacuum conduit movable between a closed position wherein transmission of vacuum to said vacuum unit is prevented and an open position wherein transmission of vacuum to said vacuum unit is permitted: a. fuel delivery means including a fuel delivery passage, a fuel flow orifice in said passage and a fuel metering rod translatable in said orifice to effect a flow area intermediate a minimum flow area and a maximum flow area, said minimum flow area allowing sufficient fuel to be provided to said engine for normally operating said transmission in said high drive ratio; b. fluid motor means connected with said metering rod and communicating with said induction passage for positioning said fuel metering rod to effect said minimum flow area when said vacuum is above a predetermined vacuum and for positioning said metering rod to effect said intermediate flow area as said vacuum drops below said predetermined vacuum while said transmission is in said lower drive ratios; c. metering rod positioning means translatable between a first position in which said metering rod effects said minimum flow area and a second position in which said fluid motor is allowed to position said metering rod to effect said intermediate flow area; and d. transmission controlled switch means connected with said metering rod positioning means and with said valve means in said vacuum conduit, said switch means having a high drive ratio condition when said transmission is in said high drive ratio for causing said metering rod positioning means to be translated to said first position from said second position while also shifting said valve means to said closed position from said open position and said switch means also having a low drive ratio condition when said transmission is in said lower drive ratios for causing said metering rod positioning means to be normally positioned in said first position and for causing said valve means to be normally positioned in said closed position, whereby with said switch means in said high ratio condition said vacuum advance unit advances the timing of ignition in said engine while said fuel delivery means effect said miminum flow area.

Claim 14

In combination with an internal combustion engine for providing a source of Vacuum, said engine connected to the input of an associated transmission the output of which is connected to a load, said transmission having a variable ratio drive means for driving said output from said input and for varying the ratio of the speed of said output relative to the speed of said input from a high drive ratio to lower drive ratios; a vacuum unit for advancing the timing of ignition in said engine when vacuum signals are applied thereto, a vacuum conduit connected between said vacuum unit and said engine and valve means in said vacuum conduit movable between a closed position wherein transmission of vacuum to said vacuum unit is prevented and an open position wherein transmission of vacuum to said vacuum unit is permitted: a. fuel delivery means including a fuel delivery passage, a fuel flow orifice in said passage and a fuel metering rod translatable in said orifice to effect a flow area intermediate a minimum flow area and a maximum flow area, said minimum flow area allowing sufficient fuel to be provided to said engine for normally operating said transmission in said high drive ratio; b. fluid motor means connected with said metering rod and communicating with said induction passage for positioning said fuel metering rod to effect said minimum flow area when said vacuum is above a predetermined vacuum and for positioning said metering rod to effect said intermediate flow area as said vacuum drops below said predetermined vacuum while said transmission is in said lower drive ratios; c. metering rod positioning means translatable between a first position in which said metering rod effects said minimum flow area and a second position in which said fluid motor is allowed to position said metering rod to effect said intermediate flow area; and d. transmission controlled switch means connected with said metering rod positioning means and with said valve means in said vacuum conduit, said switch means having a high drive ratio condition when said transmission is in said high drive ratio for causing said metering rod positioning means to be translated to said first position from said second position while also shifting said valve means to said closed position from said open position and said switch means also having a low drive ratio condition when said transmission is in said lower drive ratios for causing said metering rod positioning means to be normally positioned in said first position and for causing said valve means to be normally positioned in said closed position, whereby with said switch means in said high ratio condition said vacuum advance unit advances the timing of ignition in said engine while said fuel delivery means effect said miminum flow area.