TH56093B - Wiring configuration for throttle housings in light vehicles - Google Patents

Abstract

DC60 (19/04/60) A wiring configuration for the throttle body in a light vehicle is designed to accommodate the power unit as it swings and to limit the space available for wiring routing, thereby improving the efficiency of the wiring connections. In a light vehicle 1 provided with a power unit 5 comprising an internal combustion engine 2 and a transmission 3 and oscillatingly mounted to the body frame 4 beneath the seat 6, the wiring configuration for the throttle body in the light vehicle 1 includes a throttle body 52 positioned between the power unit and the seat, an orifice sensor 68 for sensing the level of the throttle opening position, positioned at the end of the throttle shaft 64 positioned axially across the width of the vehicle, an actuator 70 for controlling the throttle body mounted to the throttle body in close proximity to the orifice sensor, a coupler for routing the first wire 80 of the orifice sensor, and a coupler for routing the second wire 81 of the actuator. The first and second wiring harness connectors 80,81 are also mounted separately in the fore/aft direction to intersect with respect to the shaft. This throttle body wiring configuration, revised 19/04/2017, is designed to accommodate the oscillating power unit and to limit the space available for wiring routing, thereby improving the efficiency of the wiring connections. In a small vehicle 1 provided with a power unit 5, which includes an internal combustion engine 2 and a transmission 3, and is oscillatingly mounted to the body frame 4 beneath the seat 6, the throttle body wiring configuration in a small vehicle 1 includes a throttle body 52 located between the power unit and the seat. An opening sensor 68 for detecting the throttle opening level is provided at the end of the throttle shaft 64 and is aligned along the width of the vehicle. An actuator 70 for controlling the throttle body is mounted to the throttle body in close proximity to the opening sensor, and a first wiring coupler 80 of the opening sensor and a second wiring coupler 81 of the actuator, wherein the first and second wiring couplers 80, 81 are mounted separately in the same fore/aft direction so as to intersect with respect to the throttle shaft. -------------------------------------------------------------------------

Claims (9)

All rights reserved which will not appear on the advertisement page: Edited 19/04/2017 1. A small vehicle provided with a power unit (5) and a throttle body wiring configuration in said small vehicle (1), wherein said power unit (5) includes, as an integral part, the internal combustion engine (2) and the transmission (3) for the rear wheels (34), the power unit (5) is swivelingly mounted on the body frame (4) and is located beneath the seat (6), wherein the wiring configuration further comprises: a throttle body (52) controlling the intake air volume of the internal combustion engine (2) and is located between the power unit (5) and the seat (6); and wherein said wiring configuration further comprises: an opening sensor (68) detecting the level of the throttle opening and is provided at the end of the throttle shaft (64) of the throttle body (52), wherein the throttle shaft (64) is oriented axially along the width of the vehicle; The actuator (70) which controls the throttle body (52) and is mounted to the throttle body (52), in close proximity to the opening sensor (68), in the same orientation as the opening sensor (68); and a first wiring coupler (80) which connects the opening sensor (68) to the external component, and a second wiring coupler (81) which connects the actuator (70) to the external component, wherein the first and second wiring couplers (80), (81) are arranged separately along the fore/aft direction so as to intersect with respect to the axis of the throttle shaft (64). 2. The small vehicle of claim 1, wherein: the opening sensor (68) and the actuator (70) are arranged in an upward/downward direction on the throttle body (52); and the second wiring coupler (81) of the actuator (70) is positioned away from the intake path (52a) of the throttle body (52) and is tilted at an acute angle so as to approach the intake path (52a). 3. The small vehicle according to claim 2, wherein: the small vehicle (1) is provided with a suspension (40) located beneath the power unit (5), for securing the power unit (5) on the body frame; and the throttle body (52) is positioned immediately above the suspension (40) and above the power unit (5). 4. The small vehicle according to claim 3, wherein: the body frame (4) of the small vehicle includes a pair of left and right rear frames (20L, 20R) and a cross member (21) mounted between them; the cross member (21) is positioned in front of the first and second wiring couplers (80, 81); and the wires from both of the wiring couplers (80, 81) are directed to a region enclosed by the cross member (21), the pair of left and right rear frames (20L, 20R), and the top surface of the power unit (5). 5. The small vehicle of claim 4, wherein the wiring is locally deflected rearward towards the rear of the vehicle, is deflected forward again in a U-shape so as to span the vehicle in the direction of the front width of the rear wheels (34), and is coupled to the wiring of the starter motor (82) which is arranged on the top surface of the power unit (5). 6. The small vehicle according to claim 4 or 5, wherein the cross member (21) is curved so as to extend upwards towards the front of the vehicle. 7. The small vehicle according to any one of claims 4 to 6, wherein one rear frame of the pair of left and right rear frames (20L, 20R) is formed at a different position in the upward/downward direction from the other rear frame so that the cross member (21) is positioned close to both of the wiring couplers (80, 81). 8. The small vehicle of claim 2, wherein: one of the opening sensors (68) and the actuator (70) is provided with a mounting member (71) aligned with each other in the forward/aft direction of the vehicle; and the other of the opening sensors (68) and the actuator (70) is provided with a mounting member (69) aligned with each other in the upward/downward direction between the mounting members (71). 9. A small vehicle of claim 1 or 8, wherein: the throttle body (52) is held by an intake manifold (53) formed independently of the cylinder head (42) of the internal combustion engine (2); and the area in which the attachment device for attaching the intake manifold (53) to the cylinder head (42) is inserted overlaps the first and second wiring harnesses (80, 81) when viewed from the width of the vehicle and is positioned closer to the center of the vehicle than the wiring harnesses (80, 81) when viewed from the top/bottom direction. 1. A small vehicle of claim 9, wherein the wires of both wiring harnesses (80, 81) are connected closer to the intake manifold side (53) than the mating surface between the intake manifold (53) and the throttle body (52). -------------------------------------------------------------------------