Engine control device for mower

• US 4,928,458 A
• Filed: 06/19/1989
• Issued: 05/29/1990
• Est. Priority Date: 06/20/1988
• Status: Expired due to Term

• Current Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Original Assignee: Honda Giken Kogyo Kabushiki Kaisha (Honda Motor Company)
• Inventors: Muroya, Fumio, Kotani, Yoshiaki
• Primary Examiner(s): Novosad, Stephen J.
• Application Number:
  US07/367,582
• Time in Patent Office: 344 Days
• Field of Search: 56/11.8, 56/11.7, 56/10.8, 56/10.2, 56/10.5, 56/11.5, 56/14.7, 56/14.8, 56/16.7, 56/16.9, 56/DIG. 15
• US Class Current: 56/11.8
• CPC Class Codes: A01D 2101/00 Lawn-mowers
• CPC Class Codes: A01D 34/6806 Driving mechanisms for the cutters A01D34/76
• CPC Class Codes: B60Y 2200/223 Ridable lawn mowers

Abstract

A control device in a mower in which an engine output is transmitted to a cutter blade through a coupling of a clutch for performing mowing. A blade engagement switch is provided for sending a drive signal for engaging the cutter blade. A first control device receives the signal and electrically increases a degree of opening of a throttle valve of the engine. A second control device is provided for electrially performing coupling and decoupling of the clutch. A first timer circuit actuates the first control device a predetermined period upon closure of the blade engagement switch. A second timer circuit actuates the second control device to provide coupling of the clutch at a predetermined timing within the predetermined period after closure of the blade engagement switch.

Claims

1. A control device in a mower in which an engine output is transmitted to a cutter blade through a coupling of a clutch for performing mowing, the control device comprising:

a blade engagement switch for sending a drive signal for engaging the cutter blade;

a first control means for electrically increasing a degree of opening of a throttle valve of the engine;

a second control means for electrically performing coupling and decoupling of the clutch;

a first timer circuit for actuating the first control means for a predetermined period upon closure of the blade engagement switch; and

a second timer circuit for actuating the second control means to provide coupling of the clutch at a predetermined timing within the predetermined period after closure of the blade engagement switch.

2. The control device according to claim 1, wherein the first control means comprises a solenoid which forcibly moves the throttle valve toward its opening direction in response to an output signal from said first timer circuit.

3. The control device according to claim 1 wherein the second control means comprises an electromagnetic clutch disposed at a power transmission path along which the engine output is transmitted to the cutter blade

4. The control device according to claim 2 wherein the second control means comprises an electromagnetic clutch disposed at a power transmission path along which the engine output is transmitted to the cutter blade.