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A pickup truck and exhaust system combination is designed for a pickup truck having a cab and a bed extending rearwardly therefrom. The bed has a load floor bounded by a front wall adjacent the cab and a pair of side walls. The bed has an opening defined therein. The truck has an engine and an exhau

A pickup truck and exhaust system combination is designed for a pickup truck having a cab and a bed extending rearwardly therefrom. The bed has a load floor bounded by a front wall adjacent the cab and a pair of side walls. The bed has an opening defined therein. The truck has an engine and an exhaust pipe extending rearwardly under the cab to an outlet end. A flexible exhaust coupler has a first end in fluid communication with the outlet end of the exhaust pipe and a second end in fluid communication with the first end. A hollow elongated collector is disposed on the floor of the truck bed adjacent the front wall. The collector has a first end and an opposed second end with the midportion therebetween. The collector also has an inlet defined in the midportion, with the inlet being connected to the second end of the coupler through the opening in the bed. The collector also has a first outlet defined in the first end and a second outlet defined in the second end, with the outlets being in fluid communication with the inlet. First and second tubular exhaust stacks have lower ends connected to the first and second outlets and extend generally vertically upwardly therefrom to open upper ends.

대표청구항 ▼

A pickup truck and exhaust system combination is designed for a pickup truck having a cab and a bed extending rearwardly therefrom. The bed has a load floor bounded by a front wall adjacent the cab and a pair of side walls. The bed has an opening defined therein. The truck has an engine and an exhau

A pickup truck and exhaust system combination is designed for a pickup truck having a cab and a bed extending rearwardly therefrom. The bed has a load floor bounded by a front wall adjacent the cab and a pair of side walls. The bed has an opening defined therein. The truck has an engine and an exhaust pipe extending rearwardly under the cab to an outlet end. A flexible exhaust coupler has a first end in fluid communication with the outlet end of the exhaust pipe and a second end in fluid communication with the first end. A hollow elongated collector is disposed on the floor of the truck bed adjacent the front wall. The collector has a first end and an opposed second end with the midportion therebetween. The collector also has an inlet defined in the midportion, with the inlet being connected to the second end of the coupler through the opening in the bed. The collector also has a first outlet defined in the first end and a second outlet defined in the second end, with the outlets being in fluid communication with the inlet. First and second tubular exhaust stacks have lower ends connected to the first and second outlets and extend generally vertically upwardly therefrom to open upper ends. 3. A steering control system for a tracklaying vehicle according to claim 1 or 2, wherein a plurality of kinds of characteristic diagrams, each of which step-wise varies for every hydraulic pressure characteristic, are prepared and a desired characteristic diagram is selected from them. 4. A steering control system for a tracklaying vehicle, which has a clutch and brake provided for each of right and left driving wheels, electronic proportional control valves for controlling the clutches and brakes, a steering lever, a steering command signal generator for generating a steering command signal according to the operation amount of the steering lever, and a controller for issuing a steering control signal to one of the electronic proportional control valves in response to an output from the steering command signal generator, which further comprises tractive force detecting means for detecting the tractive force of the vehicle and pitch angle detecting means for detecting the pitch angle of the vehicle inclining back and forth, and wherein if it is determined by the tractive force detecting means and the pitch angle detecting means that the vehicle is not in a high-load drive state but in a descent travel state, the controller outputs a steering control signal to one of the electronic proportional control valves to obtain a hydraulic pressure characteristic which eliminates a zone in which a clutch and a brake are released at the same time and sets the upper limit of hydraulic pressure at the time of brake engagement to a first value, the first value being lower than the upper limit of hydraulic pressure when the vehicle is in a flat ground travel state. 5. A steering control system for a tracklaying vehicle according to claim 4, which further comprises rotation detecting means for detecting the rotation of an engine, and wherein if it is determined by the rotation detecting means that the engine is in its low rotational speed state, the controller outputs a steering control signal to one of the electronic proportional control valves to obtain a hydraulic pressure characteristic which sets the upper limit of hydraulic pressure at the time of brake engagement to a second value, the second value being lower than the upper limit of hydraulic pressure when the vehicle is in the flat ground travel state and higher than the first value. 6. A steering control system for a tracklaying vehicle according to claim 4 or 5, wherein a plurality of kinds of characteristic diagrams, each of which step-wise varies for every hydraulic pressure characteristic, are prepared and a desired characteristic diagram is selected from them. 7. A steering control system for a tracklaying vehicle, which has a clutch and brake provided for each of right and left driving wheels, electronic proportional control valves for controlling the clutches and brakes, a steering lever, a steering command signal generator for generating a steering command signal according to the operation amount of the steering lever, and a controller for issuing a steering control signal to one of the electronic proportional control valves in response to an output from the steering command signal generator, which further comprises speed range detecting means for detecting the speed range of a transmission, and wherein if it is determined by the speed range detecting means that the transmission is placed in a low speed range, the controller outputs a steering control signal to one of the electronic proportional control valves to obtain a hydraulic pressure characteristic which sets the rate of change of hydraulic pressure with respect to lever stroke when hydraulic pressure changes from its upper limit to its lower limit at the time of brake engagement to a low value. 8. A steering control system for a tracklaying vehicle according to claim 7, wherein the rate of change of hydraulic pressure is set to a low value by setting the lower limit of hydraulic pressure when the tr ansmission is placed in a low speed range to a value higher than the low limit of hydraulic pressure when the transmission is in a high speed range. 9. A steering control system for a tracklaying vehicle according to claim 7 or 8, wherein a plurality of kinds of characteristic diagrams, each of which step-wise varies for every hydraulic pressure characteristic, are prepared and a desired characteristic diagram is selected from them.