Governor controlled on a basis of load detection

• US 6,460,421 B1
• Filed: 06/28/2000
• Issued: 10/08/2002
• Est. Priority Date: 06/30/1999
• Status: Expired due to Fees

• Current Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd. (Yanmar Holdings Co., Ltd.)
• Original Assignee: Kanzaki Kokyukoki Mfg. Co., Ltd. (Yanmar Holdings Co., Ltd.)
• Inventors: Inoue, Toru, Hasegawa, Toshiyuki
• Primary Examiner(s): Fuller, Benjamin R.
• Assistant Examiner(s): Thompson, Jewel V.
• Application Number:
  US09/604,813
• Time in Patent Office: 832 Days
• Field of Search: 738/622.6, 731/182, 607/11, 137/355.16, 746/74, 123/140, 123/376
• US Class Current: 73/862.29
• CPC Class Codes: F02D 1/045 characterised by arrangement of springs or weights
• CPC Class Codes: F02D 11/04 characterised by mechanical control linkages F02D11/06 takes precedence
• CPC Class Codes: F02D 2009/0267 for simultaneous action of a governor and an accelerator lever on the throttle

Abstract

A governor comprising an output setting means for setting an output value for an engine, an output adjusting means for adjusting an engine output based on a value set by the output setting means, and a load detecting means. The load detecting means is provided in a transmission system for driving a vehicle for detecting an amount of load torque generated through rotational resistance applied on the axles that is transmitted from the axles to the engine through the transmission system. The governor is a load detecting type governor in which the engine output is controlled to increase in response to the generated load torque detected by the load detecting means by displacing a position of the output adjusting means, as defined by the output setting means, to an output increasing side in accordance with a detected value of load torque and to maintain the engine output in the position, as defined by the output setting means, even upon detection of load torque by the load detecting means when the set value of the output setting means is an initial value or in a specified low output set region including the initial value. Further, the governor operates to increase a response speed of the output adjusting means with respect to load detection of the load detecting means as the set value of the output setting means increases beyond the initial value or the specified low output set region including the initial value.

Claims

1. A load detecting governor mechanism for a vehicle engine, comprising:

an output setting device for setting an output value for the engine,

an output adjusting device for adjusting an output of the engine based on a value set by the output setting device,

a load detecting device provided on a transmission system for driving a vehicle extending from the engine to axles, for detecting an amount of load torque generated through rotational resistance applied on the axles and transmitted from the axles to the engine through the transmission system, and

a governor link mechanism interlockingly connecting the output setting device, the output adjusting device and the load detecting device with one another,

wherein the engine output is controlled to increase in response to the generated load torque by displacing a position of the output adjusting device as defined by the output setting device to an output increasing side in accordance with a selected value when load torque is detected by the load detecting device, and

wherein the governor link mechanism is constructed so that the output adjusting device is maintained at the position as defined by the output setting device even upon detection of load torque by the load detecting device when the set value of the output setting device is an initial value or in a specified low output set region including the initial value.

2. The load detecting governor mechanism as recited in claim 1, wherein a response speed of the output adjusting device with respect to load detection of the load detecting device is increased with increases in the set value by the output setting device beyond the initial value or the specified low output set region including the initial value.

3. The load detecting governor mechanism as recited in claim 1, wherein the governor link mechanism is provided with a movable member that is linked to the output adjusting device and that is displaced on a basis of the set value of the output setting device,

wherein the movable member is further connected to the load detecting device and the output setting device is further displaced to the output increasing side by further displacing a position of the movable member as defined by the set value of the output setting device upon detection of load torque by the load detecting device, and

wherein the governor link mechanism is provided with a play between the load detecting device and the movable member such that the movable member is not displaced upon detection of load even though the load torque is detected by the load detecting device when the set value of the output setting device is the initial value or in the specified low output set region including the initial value.

4. The load detecting governor mechanism as recited in claim 3, wherein the play between the load detecting device and the movable member is decreased and vanished with increases in the set value of the output setting device beyond the low output set region.

5. The load detecting governor mechanism as recited in claim 3, wherein the movable member is incorporated in a housing in which the transmission system is incorporated.

6. A load detecting governor mechanism for a vehicle engine, comprising:

an output setting device for setting an output value for the engine,

an output adjusting device for adjusting an output of the engine based on a value set by the output setting device,

a revolution speed detecting device for detecting an output revolution speed of the engine,

a load detecting device provided in a transmission system for driving a vehicle extending from the engine to axles, for detecting an amount of load torque generated through rotational resistance applied on the axles and transmitted from the axles to the engine through the transmission system, and

a governor link mechanism including a first link and a second link, wherein the first link operatively connects the output adjusting device with the revolution speed detecting device so as to displace the output adjusting device to an output decreasing side accompanying increases in the detected value of the revolution speed detecting device,

wherein the second link operatively connecting the output setting device with the load detecting device so as to be displaced in one direction with increases in the set value of the output setting device, is further displaced in the one direction upon detection of load torque by the load detecting device, and

wherein the first link and the second link are linked such that a displacement direction of the second link accompanying the increase in detected value of the revolution detecting device are opposite wit respect to each other, and that the first link is displaced upon displacement of the second link by an amount decrement by the displacement amount on a basis of detection of the revolution speed detecting device.

7. The load detecting governor mechanism as claimed in claim 6, wherein an elastic member is interposed between the first link and the second link.

8. The load detecting governor mechanism as claimed in claim 6, wherein the governor link mechanism is provided with a play between the load detecting device and the second link such that the second link is not displaced upon detection of load even though load torque is detected by the load detecting device when the set value of the output setting device is the initial value or in the specified low output set region including the initial value.

9. The load detecting governor mechanism as claimed in claim 8, wherein the play between the load detecting device and the second link is decreased and vanished with increases in the set value of the output setting device beyond the initial value or the specified low output set region including the initial value.